添加一些关于midi播放的项目
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terryLP
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lemcu.org GPL Exception version 1.0
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-----------------------------------
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As an additional permission, if Lemcusb library is statically linked with one or more of the following
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software libraries, then, these software libraries are not subjected to the TERMS AND CONDITIONS of
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GNU General Public License version 3.0.
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(1) Silicon Laboratories Inc's "emlib", "emdrv", any software supplied as part of application note and/or examples.
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(2) ARM Limited's "CMSIS".
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They are bound by their own terms and conditions as specified by their authors.
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The Lemcusb is Copyright (C) 2014 http://lemcu.org
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You may use, distribute and copy the Lemcusb under the terms of
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GNU General Public License version 3.0, which is displayed below.
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-------------------------------------------------------------------------
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GNU GENERAL PUBLIC LICENSE
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Version 3, 29 June 2007
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|
||||
Moreover, your license from a particular copyright holder is
|
||||
reinstated permanently if the copyright holder notifies you of the
|
||||
violation by some reasonable means, this is the first time you have
|
||||
received notice of violation of this License (for any work) from that
|
||||
copyright holder, and you cure the violation prior to 30 days after
|
||||
your receipt of the notice.
|
||||
|
||||
Termination of your rights under this section does not terminate the
|
||||
licenses of parties who have received copies or rights from you under
|
||||
this License. If your rights have been terminated and not permanently
|
||||
reinstated, you do not qualify to receive new licenses for the same
|
||||
material under section 10.
|
||||
|
||||
9. Acceptance Not Required for Having Copies.
|
||||
|
||||
You are not required to accept this License in order to receive or
|
||||
run a copy of the Program. Ancillary propagation of a covered work
|
||||
occurring solely as a consequence of using peer-to-peer transmission
|
||||
to receive a copy likewise does not require acceptance. However,
|
||||
nothing other than this License grants you permission to propagate or
|
||||
modify any covered work. These actions infringe copyright if you do
|
||||
not accept this License. Therefore, by modifying or propagating a
|
||||
covered work, you indicate your acceptance of this License to do so.
|
||||
|
||||
10. Automatic Licensing of Downstream Recipients.
|
||||
|
||||
Each time you convey a covered work, the recipient automatically
|
||||
receives a license from the original licensors, to run, modify and
|
||||
propagate that work, subject to this License. You are not responsible
|
||||
for enforcing compliance by third parties with this License.
|
||||
|
||||
An "entity transaction" is a transaction transferring control of an
|
||||
organization, or substantially all assets of one, or subdividing an
|
||||
organization, or merging organizations. If propagation of a covered
|
||||
work results from an entity transaction, each party to that
|
||||
transaction who receives a copy of the work also receives whatever
|
||||
licenses to the work the party's predecessor in interest had or could
|
||||
give under the previous paragraph, plus a right to possession of the
|
||||
Corresponding Source of the work from the predecessor in interest, if
|
||||
the predecessor has it or can get it with reasonable efforts.
|
||||
|
||||
You may not impose any further restrictions on the exercise of the
|
||||
rights granted or affirmed under this License. For example, you may
|
||||
not impose a license fee, royalty, or other charge for exercise of
|
||||
rights granted under this License, and you may not initiate litigation
|
||||
(including a cross-claim or counterclaim in a lawsuit) alleging that
|
||||
any patent claim is infringed by making, using, selling, offering for
|
||||
sale, or importing the Program or any portion of it.
|
||||
|
||||
11. Patents.
|
||||
|
||||
A "contributor" is a copyright holder who authorizes use under this
|
||||
License of the Program or a work on which the Program is based. The
|
||||
work thus licensed is called the contributor's "contributor version".
|
||||
|
||||
A contributor's "essential patent claims" are all patent claims
|
||||
owned or controlled by the contributor, whether already acquired or
|
||||
hereafter acquired, that would be infringed by some manner, permitted
|
||||
by this License, of making, using, or selling its contributor version,
|
||||
but do not include claims that would be infringed only as a
|
||||
consequence of further modification of the contributor version. For
|
||||
purposes of this definition, "control" includes the right to grant
|
||||
patent sublicenses in a manner consistent with the requirements of
|
||||
this License.
|
||||
|
||||
Each contributor grants you a non-exclusive, worldwide, royalty-free
|
||||
patent license under the contributor's essential patent claims, to
|
||||
make, use, sell, offer for sale, import and otherwise run, modify and
|
||||
propagate the contents of its contributor version.
|
||||
|
||||
In the following three paragraphs, a "patent license" is any express
|
||||
agreement or commitment, however denominated, not to enforce a patent
|
||||
(such as an express permission to practice a patent or covenant not to
|
||||
sue for patent infringement). To "grant" such a patent license to a
|
||||
party means to make such an agreement or commitment not to enforce a
|
||||
patent against the party.
|
||||
|
||||
If you convey a covered work, knowingly relying on a patent license,
|
||||
and the Corresponding Source of the work is not available for anyone
|
||||
to copy, free of charge and under the terms of this License, through a
|
||||
publicly available network server or other readily accessible means,
|
||||
then you must either (1) cause the Corresponding Source to be so
|
||||
available, or (2) arrange to deprive yourself of the benefit of the
|
||||
patent license for this particular work, or (3) arrange, in a manner
|
||||
consistent with the requirements of this License, to extend the patent
|
||||
license to downstream recipients. "Knowingly relying" means you have
|
||||
actual knowledge that, but for the patent license, your conveying the
|
||||
covered work in a country, or your recipient's use of the covered work
|
||||
in a country, would infringe one or more identifiable patents in that
|
||||
country that you have reason to believe are valid.
|
||||
|
||||
If, pursuant to or in connection with a single transaction or
|
||||
arrangement, you convey, or propagate by procuring conveyance of, a
|
||||
covered work, and grant a patent license to some of the parties
|
||||
receiving the covered work authorizing them to use, propagate, modify
|
||||
or convey a specific copy of the covered work, then the patent license
|
||||
you grant is automatically extended to all recipients of the covered
|
||||
work and works based on it.
|
||||
|
||||
A patent license is "discriminatory" if it does not include within
|
||||
the scope of its coverage, prohibits the exercise of, or is
|
||||
conditioned on the non-exercise of one or more of the rights that are
|
||||
specifically granted under this License. You may not convey a covered
|
||||
work if you are a party to an arrangement with a third party that is
|
||||
in the business of distributing software, under which you make payment
|
||||
to the third party based on the extent of your activity of conveying
|
||||
the work, and under which the third party grants, to any of the
|
||||
parties who would receive the covered work from you, a discriminatory
|
||||
patent license (a) in connection with copies of the covered work
|
||||
conveyed by you (or copies made from those copies), or (b) primarily
|
||||
for and in connection with specific products or compilations that
|
||||
contain the covered work, unless you entered into that arrangement,
|
||||
or that patent license was granted, prior to 28 March 2007.
|
||||
|
||||
Nothing in this License shall be construed as excluding or limiting
|
||||
any implied license or other defenses to infringement that may
|
||||
otherwise be available to you under applicable patent law.
|
||||
|
||||
12. No Surrender of Others' Freedom.
|
||||
|
||||
If conditions are imposed on you (whether by court order, agreement or
|
||||
otherwise) that contradict the conditions of this License, they do not
|
||||
excuse you from the conditions of this License. If you cannot convey a
|
||||
covered work so as to satisfy simultaneously your obligations under this
|
||||
License and any other pertinent obligations, then as a consequence you may
|
||||
not convey it at all. For example, if you agree to terms that obligate you
|
||||
to collect a royalty for further conveying from those to whom you convey
|
||||
the Program, the only way you could satisfy both those terms and this
|
||||
License would be to refrain entirely from conveying the Program.
|
||||
|
||||
13. Use with the GNU Affero General Public License.
|
||||
|
||||
Notwithstanding any other provision of this License, you have
|
||||
permission to link or combine any covered work with a work licensed
|
||||
under version 3 of the GNU Affero General Public License into a single
|
||||
combined work, and to convey the resulting work. The terms of this
|
||||
License will continue to apply to the part which is the covered work,
|
||||
but the special requirements of the GNU Affero General Public License,
|
||||
section 13, concerning interaction through a network will apply to the
|
||||
combination as such.
|
||||
|
||||
14. Revised Versions of this License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions of
|
||||
the GNU General Public License from time to time. Such new versions will
|
||||
be similar in spirit to the present version, but may differ in detail to
|
||||
address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Program specifies that a certain numbered version of the GNU General
|
||||
Public License "or any later version" applies to it, you have the
|
||||
option of following the terms and conditions either of that numbered
|
||||
version or of any later version published by the Free Software
|
||||
Foundation. If the Program does not specify a version number of the
|
||||
GNU General Public License, you may choose any version ever published
|
||||
by the Free Software Foundation.
|
||||
|
||||
If the Program specifies that a proxy can decide which future
|
||||
versions of the GNU General Public License can be used, that proxy's
|
||||
public statement of acceptance of a version permanently authorizes you
|
||||
to choose that version for the Program.
|
||||
|
||||
Later license versions may give you additional or different
|
||||
permissions. However, no additional obligations are imposed on any
|
||||
author or copyright holder as a result of your choosing to follow a
|
||||
later version.
|
||||
|
||||
15. Disclaimer of Warranty.
|
||||
|
||||
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
|
||||
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
|
||||
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
|
||||
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
|
||||
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
|
||||
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
|
||||
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||
|
||||
16. Limitation of Liability.
|
||||
|
||||
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
|
||||
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
||||
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
|
||||
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
|
||||
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
|
||||
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
|
||||
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
|
||||
SUCH DAMAGES.
|
||||
|
||||
17. Interpretation of Sections 15 and 16.
|
||||
|
||||
If the disclaimer of warranty and limitation of liability provided
|
||||
above cannot be given local legal effect according to their terms,
|
||||
reviewing courts shall apply local law that most closely approximates
|
||||
an absolute waiver of all civil liability in connection with the
|
||||
Program, unless a warranty or assumption of liability accompanies a
|
||||
copy of the Program in return for a fee.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
How to Apply These Terms to Your New Programs
|
||||
|
||||
If you develop a new program, and you want it to be of the greatest
|
||||
possible use to the public, the best way to achieve this is to make it
|
||||
free software which everyone can redistribute and change under these terms.
|
||||
|
||||
To do so, attach the following notices to the program. It is safest
|
||||
to attach them to the start of each source file to most effectively
|
||||
state the exclusion of warranty; and each file should have at least
|
||||
the "copyright" line and a pointer to where the full notice is found.
|
||||
|
||||
<one line to give the program's name and a brief idea of what it does.>
|
||||
Copyright (C) <year> <name of author>
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
Also add information on how to contact you by electronic and paper mail.
|
||||
|
||||
If the program does terminal interaction, make it output a short
|
||||
notice like this when it starts in an interactive mode:
|
||||
|
||||
<program> Copyright (C) <year> <name of author>
|
||||
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
||||
This is free software, and you are welcome to redistribute it
|
||||
under certain conditions; type `show c' for details.
|
||||
|
||||
The hypothetical commands `show w' and `show c' should show the appropriate
|
||||
parts of the General Public License. Of course, your program's commands
|
||||
might be different; for a GUI interface, you would use an "about box".
|
||||
|
||||
You should also get your employer (if you work as a programmer) or school,
|
||||
if any, to sign a "copyright disclaimer" for the program, if necessary.
|
||||
For more information on this, and how to apply and follow the GNU GPL, see
|
||||
<http://www.gnu.org/licenses/>.
|
||||
|
||||
The GNU General Public License does not permit incorporating your program
|
||||
into proprietary programs. If your program is a subroutine library, you
|
||||
may consider it more useful to permit linking proprietary applications with
|
||||
the library. If this is what you want to do, use the GNU Lesser General
|
||||
Public License instead of this License. But first, please read
|
||||
<http://www.gnu.org/philosophy/why-not-lgpl.html>.
|
||||
@@ -0,0 +1,35 @@
|
||||
/****************************************************************************
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __C_COMPAT_H__
|
||||
#define __C_COMPAT_H__
|
||||
|
||||
|
||||
#if defined ( __ICCARM__ )
|
||||
#define RAMFUNC __ramfunc
|
||||
#else
|
||||
#define RAMFUNC __attribute__((__long_call__)) __attribute__((section(".functioninRAM"))) __attribute__ ((noinline))
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,381 @@
|
||||
/****************************************************************************
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#include "usb.h"
|
||||
//#include "em_device.h"
|
||||
//#include "em_cmu.h"
|
||||
//#include "em_int.h"
|
||||
//#include "em_timer.h"
|
||||
#include "gpio.h"
|
||||
#include "usb_internal_ll.h"
|
||||
#include "usb_stack.h"
|
||||
#include "usb_helperfunctions.h"
|
||||
|
||||
|
||||
void usb_reset_received(void)
|
||||
{
|
||||
uint32_t cnt;
|
||||
uint32_t *ptr;
|
||||
|
||||
GPIOA->PSOR = (1<<1);
|
||||
|
||||
/* zero intitialize endpoint buffers and len/status fields */
|
||||
ptr = (uint32_t *)usb_ep_buffers;
|
||||
for (cnt=0; cnt < (sizeof(usb_ep_buffers)>>2); cnt++)
|
||||
{
|
||||
*ptr++ = 0;
|
||||
}
|
||||
|
||||
/* preinitialize DATA PIDS for IN endpoints */
|
||||
usb_ep_buffers[USB_EPBUF_OFFSET_EP0IN_BUF] = 0x4B;
|
||||
usb_ep_buffers[USB_EPBUF_OFFSET_EP1IN_BUF] = 0x4B;
|
||||
|
||||
/* reset usb device address to 0 (will be changed during enumeration) */
|
||||
usbstack_init();
|
||||
GPIOA->PSOR = (1<<1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Pinout information:
|
||||
* PA2 = D-
|
||||
* PA3 = D+
|
||||
* PA1 = debug output (to scope)
|
||||
*/
|
||||
|
||||
/*
|
||||
* Pre-condition: GPIO clock enabled
|
||||
*
|
||||
*/
|
||||
void usb_init(void)
|
||||
{
|
||||
usb_reset_received();
|
||||
|
||||
/* Pinout: PA1 = USB connect line (1k5 resistor to PC0)
|
||||
PA2 = D-
|
||||
PA3 = D+
|
||||
*/
|
||||
/* set PA0 low (disconnected) Will enable the pulldown */
|
||||
GPIOA->PCOR = (1 << 2);
|
||||
/* Pin PA0 is configured to Input enabled with pull-down */
|
||||
//GPIO->P[0].MODEL = (GPIO->P[0].MODEL & ~_GPIO_P_MODEL_MODE0_MASK) | GPIO_P_MODEL_MODE0_INPUTPULL;
|
||||
|
||||
/* Pin PC0 is configured to Input enabled */
|
||||
//GPIO->P[2].MODEL = (GPIO->P[2].MODEL & ~_GPIO_P_MODEL_MODE0_MASK) | GPIO_P_MODEL_MODE0_INPUT;
|
||||
/* Pin PC1 is configured to Input enabled */
|
||||
// GPIO->P[2].MODEL = (GPIO->P[2].MODEL & ~_GPIO_P_MODEL_MODE1_MASK) | GPIO_P_MODEL_MODE1_INPUT;
|
||||
|
||||
/* set output state of PC0 PC1 (D- D+) to 1 0 */
|
||||
GPIOA->PSOR = (1<<2); /* D- = 1 */
|
||||
GPIOA->PCOR = (1<<3); /* D+ = 0 */
|
||||
|
||||
/* Pin PE13 is configured to Push-pull */
|
||||
//GPIO->P[4].MODEH = (GPIO->P[4].MODEH & ~_GPIO_P_MODEH_MODE13_MASK) | GPIO_P_MODEH_MODE13_PUSHPULL;
|
||||
|
||||
/* setup PC1 interrupt on rising edge (D+ first SYNC bit) */
|
||||
/* Configure PC1 interrupt on rising edge */
|
||||
// GPIO_IntConfig(gpioPortC, 1, true, false, true);
|
||||
/* Set Interrupt priority to highest */
|
||||
// NVIC_SetPriority(GPIO_ODD_IRQn, 0);
|
||||
/* Enable GPIO_EVEN interrupt vector in NVIC */
|
||||
// NVIC_EnableIRQ(GPIO_ODD_IRQn);
|
||||
}
|
||||
|
||||
void usb_connect(void)
|
||||
{
|
||||
GPIOA->PSOR = (1 << 3);
|
||||
//GPIO->P[0].MODEL = (GPIO->P[0].MODEL & ~_GPIO_P_MODEL_MODE0_MASK) | GPIO_P_MODEL_MODE0_PUSHPULL;
|
||||
}
|
||||
|
||||
void usb_disconnect(void)
|
||||
{
|
||||
/* Pin PA0 is configured to Input enabled with pull-down */
|
||||
// GPIO->P[0].MODEL = (GPIO->P[0].MODEL & ~_GPIO_P_MODEL_MODE0_MASK) | GPIO_P_MODEL_MODE0_INPUTPULL;
|
||||
/* set PA0 low (disconnected) Will enable the pulldown */
|
||||
GPIOA->PCOR = (1 << 3);
|
||||
}
|
||||
|
||||
bool usb_check_resetcondition(void)
|
||||
{
|
||||
return ( (GPIOA->PDIR & 0x00000006) == 0x00 );
|
||||
}
|
||||
|
||||
/* check if a setup packet was received */
|
||||
bool usb_setup_available(void)
|
||||
{
|
||||
return (usb_ep_buffers[USB_EPBUF_OFFSET_SETUP_BUF + USB_EPBUF_SUBOFFSET_STAT] & (1 << 0)) != 0x00;
|
||||
}
|
||||
|
||||
/* IDEA: The reordering / Bitreversal can be done in place to save some RAM */
|
||||
void usb_setup_get_data(setupData_t *psetupdata)
|
||||
{
|
||||
uint32_t i, j;
|
||||
uint8_t dat;
|
||||
uint8_t setupdat[8];
|
||||
volatile uint8_t *SETUP_BUF;
|
||||
|
||||
SETUP_BUF = &usb_ep_buffers[USB_EPBUF_OFFSET_SETUP_BUF];
|
||||
for (i=0; i<8; i++) /* walk through all bytes */
|
||||
{
|
||||
j = i+1;
|
||||
j = (j & 0xfC) | (3-(j & 0x03)); /* reverse byteorder => TODO: This can be done in the .s file using the REV instruction (single cycle) */
|
||||
dat = SETUP_BUF[j];
|
||||
dat = bitreverse(dat); /* reverse bits*/
|
||||
setupdat[i] = dat; /* store data */
|
||||
}
|
||||
usb_ep_buffers[USB_EPBUF_OFFSET_SETUP_BUF + USB_EPBUF_SUBOFFSET_STAT] &= ~(1 << 0); /* flag setup data as empty */
|
||||
|
||||
psetupdata->bmRequestType = setupdat[0];
|
||||
psetupdata->bRequest = setupdat[1];
|
||||
psetupdata->wValue = setupdat[2];
|
||||
psetupdata->wValue |= setupdat[3] << 8;
|
||||
psetupdata->wIndex = setupdat[4];
|
||||
psetupdata->wIndex |= setupdat[5] << 8;
|
||||
psetupdata->wLength = setupdat[6];
|
||||
psetupdata->wLength |= setupdat[7] << 8;
|
||||
}
|
||||
|
||||
bool usb_ep_in_buf_empty(uint32_t epnum)
|
||||
{
|
||||
if (epnum)
|
||||
{
|
||||
return (usb_ep_buffers[USB_EPBUF_OFFSET_EP1IN_BUF + USB_EPBUF_SUBOFFSET_STAT] & (1 << 0)) == 0x00;
|
||||
}
|
||||
else
|
||||
{
|
||||
return (usb_ep_buffers[USB_EPBUF_OFFSET_EP0IN_BUF + USB_EPBUF_SUBOFFSET_STAT] & (1 << 0)) == 0x00;
|
||||
}
|
||||
}
|
||||
|
||||
/* TODO/IDEA: check parameters like len. This can be done e.g. with ASSERTIONS, so
|
||||
* that checks can be disabled later to save time & space
|
||||
*/
|
||||
void usb_ep_in_commit_pkt(uint32_t epnum, bool firstpkt, const uint8_t *pbuf, uint32_t len)
|
||||
{
|
||||
uint32_t i;
|
||||
uint8_t dat;
|
||||
uint16_t crc_value;
|
||||
volatile uint8_t *EP0IN_BUF;
|
||||
|
||||
if (!len)
|
||||
{
|
||||
GPIOA->PSOR = (1<<8);
|
||||
GPIOA->PCOR = (1<<8);
|
||||
}
|
||||
|
||||
if (epnum)
|
||||
{
|
||||
EP0IN_BUF = &usb_ep_buffers[USB_EPBUF_OFFSET_EP1IN_BUF];
|
||||
}
|
||||
else
|
||||
{
|
||||
EP0IN_BUF = &usb_ep_buffers[USB_EPBUF_OFFSET_EP0IN_BUF];
|
||||
}
|
||||
|
||||
if (firstpkt)
|
||||
{
|
||||
EP0IN_BUF[0] = 0x4B; /* first IN packet is always transmitted with DATA1 PID */
|
||||
}
|
||||
else
|
||||
{
|
||||
EP0IN_BUF[0] ^= 0x88; /* Following packets toggle between DATA0 and DATA1 PID */
|
||||
}
|
||||
|
||||
crc_value = 0xffff;
|
||||
for (i=0; i<len; i++)
|
||||
{
|
||||
dat = *pbuf++;
|
||||
EP0IN_BUF[i+1] = dat;
|
||||
crc_value = crc16(crc_value, dat);
|
||||
}
|
||||
|
||||
crc_value = ~crc_value; /* this is described in the USB spec. */
|
||||
|
||||
/* ADD CRC */
|
||||
EP0IN_BUF[1+len+0] = crc_value & 0xff; /* CRC low */
|
||||
EP0IN_BUF[1+len+1] = crc_value >> 8; /* CRC high */
|
||||
|
||||
/* set packet length */
|
||||
EP0IN_BUF[USB_EPBUF_SUBOFFSET_LEN] = len + 1 +2; /* DATAx PID + CRC16 */
|
||||
|
||||
/* Flag endpoint as "ready" for transmission. This needs to be done as the last step */
|
||||
EP0IN_BUF[USB_EPBUF_SUBOFFSET_STAT] |= (1 << 0);
|
||||
}
|
||||
|
||||
bool usb_ep_out_data_available(uint32_t epnum)
|
||||
{
|
||||
if (epnum == 0x00)
|
||||
{
|
||||
return (usb_ep_buffers[USB_EPBUF_OFFSET_EP0OUT_BUF + USB_EPBUF_SUBOFFSET_STAT] & (1 << 0)) != 0x00;
|
||||
}
|
||||
else
|
||||
{
|
||||
return (usb_ep_buffers[USB_EPBUF_OFFSET_EP1OUT_BUF + USB_EPBUF_SUBOFFSET_STAT] & (1 << 0)) != 0x00;
|
||||
}
|
||||
}
|
||||
|
||||
uint32_t usb_ep_out_get_data(uint32_t epnum, uint8_t *pbuf)
|
||||
{
|
||||
uint32_t i, j, len;
|
||||
uint8_t dat, bytecount;
|
||||
volatile uint8_t *EP0OUT_BUF;
|
||||
|
||||
if (epnum == 0)
|
||||
{
|
||||
EP0OUT_BUF = &usb_ep_buffers[USB_EPBUF_OFFSET_EP0OUT_BUF];
|
||||
}
|
||||
else
|
||||
{
|
||||
EP0OUT_BUF = &usb_ep_buffers[USB_EPBUF_OFFSET_EP1OUT_BUF];
|
||||
}
|
||||
|
||||
len = EP0OUT_BUF[USB_EPBUF_SUBOFFSET_LEN];
|
||||
bytecount = ((len + 7) >> 3) - 1 - 2; /* -PID -CRC16 */
|
||||
|
||||
for (i=0; i<bytecount; i++) /* walk through all bytes */
|
||||
{
|
||||
j = i+1;
|
||||
j = (j & 0xfC) | (3-(j & 0x03)); /* reverse byteorder => TODO: This can be done in the .s file using the REV instruction (single cycle) */
|
||||
dat = EP0OUT_BUF[j];
|
||||
dat = bitreverse(dat); /* reverse bits*/
|
||||
*pbuf++ = dat; /* store data */
|
||||
}
|
||||
|
||||
//bytecount = 0;
|
||||
|
||||
if (bytecount > 0)
|
||||
{
|
||||
volatile int i;
|
||||
i=0;
|
||||
}
|
||||
|
||||
/* flag endpoint as empty. Needs to be done as last step */
|
||||
EP0OUT_BUF[USB_EPBUF_SUBOFFSET_STAT] &= ~(1 << 0);
|
||||
//usb_ep_buffers[USB_EPBUF_OFFSET_EP0OUT_BUF + USB_EPBUF_SUBOFFSET_STAT] &= ~(1 << 0);
|
||||
|
||||
return bytecount;
|
||||
}
|
||||
|
||||
void usb_ep_stall(uint32_t epnum)
|
||||
{
|
||||
usb_ep_buffers[epnum + USB_EPBUF_SUBOFFSET_STAT] |= (1 << 1);
|
||||
}
|
||||
|
||||
void usb_ep_unstall(uint32_t epnum)
|
||||
{
|
||||
usb_ep_buffers[epnum + USB_EPBUF_SUBOFFSET_STAT] &= ~(1 << 1);
|
||||
}
|
||||
|
||||
bool usb_ep_is_stalled(uint32_t epnum)
|
||||
{
|
||||
return (usb_ep_buffers[epnum + USB_EPBUF_SUBOFFSET_STAT] & (1 << 1));
|
||||
}
|
||||
|
||||
/* send a package via EP0IN which is longer as 7 bytes */
|
||||
void usb_ep_in_commit_pkt_long(uint32_t epnum, const uint8_t *pbuf, uint8_t len, bool sendshortpkt)
|
||||
{
|
||||
bool first;
|
||||
uint8_t curlen;
|
||||
|
||||
first = (epnum == 0x00); /* EP0IN packets always start with DATA1 PID, while EP1IN PID toggles between DATA0/1 */
|
||||
|
||||
curlen = 0;
|
||||
|
||||
while (len)
|
||||
{
|
||||
curlen = len;
|
||||
if (curlen > 8)
|
||||
{
|
||||
curlen = 8;
|
||||
}
|
||||
while (!usb_ep_in_buf_empty(epnum)); /* wait until endpoint buffer is free */
|
||||
usb_ep_in_commit_pkt(epnum, first, pbuf, curlen);
|
||||
len -= curlen;
|
||||
pbuf += curlen;
|
||||
first = false;
|
||||
}
|
||||
if (!sendshortpkt)
|
||||
{
|
||||
return;
|
||||
}
|
||||
if ((curlen == 8) || (curlen == 0)) /* in case the last packet has 8 bytes a short packet needs to be sent to signalize the host, that this was the last packet*/
|
||||
{
|
||||
while (!usb_ep_in_buf_empty(epnum)); /* wait until endpoint buffer is free */
|
||||
usb_ep_in_commit_pkt(epnum, false, pbuf, 0);
|
||||
}
|
||||
}
|
||||
|
||||
/* receive a package via EP0OUT. It is allowed to be longer than 8 bytes */
|
||||
/* important: ensure, that pbuf has a buffer size with a multiple of 8 Bytes */
|
||||
/* returns received length */
|
||||
uint8_t usb_ep_out_get_data_long(uint8_t *pbuf, uint8_t maxlen)
|
||||
{
|
||||
uint8_t curlen, len;
|
||||
|
||||
curlen = 8;
|
||||
len = 0;
|
||||
do
|
||||
{
|
||||
if (usb_ep_out_data_available(0))
|
||||
{
|
||||
curlen = usb_ep_out_get_data(0, pbuf); /* TODO: Handle this within usb_stack.c. It is part of control transfers. setup */
|
||||
pbuf += curlen;
|
||||
if (len >= maxlen) /* at least a little bit of protection against buffer overruns */
|
||||
{
|
||||
pbuf -= curlen;
|
||||
}
|
||||
len += curlen;
|
||||
}
|
||||
} while ( (curlen == 8) && (len < maxlen) ); /* a short packet indicates the last packet */
|
||||
return len;
|
||||
}
|
||||
|
||||
/* Handle a Control transfer without data stage => transmits a ACK in status stage */
|
||||
void usb_control_acknowledge(void)
|
||||
{
|
||||
uint8_t response[8];
|
||||
while (!usb_ep_in_buf_empty(0x00))
|
||||
;
|
||||
usb_ep_in_commit_pkt(0, true, response, 0);
|
||||
}
|
||||
|
||||
/* Handle a Control IN transfer */
|
||||
bool usb_control_dataIn(const uint8_t *pbuf, uint8_t len)
|
||||
{
|
||||
usb_ep_in_commit_pkt_long(0, pbuf, len, false);//true);
|
||||
/* wait for status stage - acknowledge from HOST*/
|
||||
while ( !usb_ep_out_data_available(0) )
|
||||
{
|
||||
}
|
||||
usb_ep_buffers[USB_EPBUF_OFFSET_EP0OUT_BUF + USB_EPBUF_SUBOFFSET_STAT] &= ~(1 << 0); /* ignore ACK (OUT packet) */
|
||||
return true;
|
||||
}
|
||||
|
||||
/* Handle a Control OUT transfer */
|
||||
uint8_t usb_control_dataOut(uint8_t *pbuf, uint8_t maxlen)
|
||||
{
|
||||
maxlen = usb_ep_out_get_data_long(pbuf, maxlen);
|
||||
usb_control_acknowledge();
|
||||
return maxlen;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* TODO: Combine the functions */
|
||||
@@ -0,0 +1,137 @@
|
||||
/****************************************************************************//*
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __USB_H__
|
||||
#define __USB_H__
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include "usb_config.h"
|
||||
|
||||
/* public interface to virtual USB peripheral & Stack */
|
||||
|
||||
/* some definitions for USB descriptors */
|
||||
#define DESCRIPTOR_DEVICE (0x01) /* Get device descriptor: Device */
|
||||
#define DESCRIPTOR_CONFIGURATION (0x02) /* Get device descriptor: Configuration */
|
||||
#define DESCRIPTOR_STRING (0x03) /* Get device descriptor: String */
|
||||
#define DESCRIPTOR_INTERFACE (0x04)
|
||||
#define DESCRIPTOR_ENDPOINT (0x05)
|
||||
|
||||
#ifdef USB_ENABLE_HID
|
||||
#define DESCRIPTOR_HID (0x21) /* Get descriptor: HID */
|
||||
#define DESCRIPTOR_REPORT (0x22) /* Get descriptor: Report */
|
||||
#endif
|
||||
|
||||
#define EPTYPE_CONTROL (0x00)
|
||||
#define EPTYPE_INTERRUPT (0x03)
|
||||
|
||||
|
||||
/* Some defines for endpoint function parameters => TODO, will be used in a later stage */
|
||||
#define USB_EPSETUP (0)
|
||||
#define USB_EP0OUT (16)
|
||||
#define USB_EP0IN (32)
|
||||
#if USB_ENABLE_EP1OUT_EP1IN == 1
|
||||
#define USB_EP1OUT (48)
|
||||
#define USB_EP1IN (64)
|
||||
#endif
|
||||
|
||||
|
||||
/* struct, which is used for control transfers */
|
||||
typedef struct
|
||||
{
|
||||
uint8_t bmRequestType;
|
||||
uint8_t bRequest;
|
||||
uint16_t wLength;
|
||||
uint16_t wValue;
|
||||
uint16_t wIndex;
|
||||
} setupData_t;
|
||||
|
||||
|
||||
|
||||
/* Initialize USB and all used peripherals
|
||||
It startes with the USB peripheral disconnected from PC.
|
||||
Call usb_connect after initialization.
|
||||
*/
|
||||
void usb_init(void);
|
||||
|
||||
void usb_connect(void);
|
||||
|
||||
void usb_disconnect(void);
|
||||
|
||||
bool usb_check_resetcondition(void);
|
||||
|
||||
void usb_reset_received(void);
|
||||
|
||||
|
||||
|
||||
/* check, if a setup packet was received */
|
||||
bool usb_setup_available(void);
|
||||
|
||||
/* read setup data. Setup data does have a fixed length of 8 Bytes */
|
||||
void usb_setup_get_data(setupData_t *psetupdata);
|
||||
|
||||
|
||||
|
||||
/* check, if data can be written to ep0in buffer (== buffer is empty) */
|
||||
bool usb_ep_in_buf_empty(uint32_t epnum);
|
||||
|
||||
|
||||
/* write data to ep0in buffer */
|
||||
void usb_ep_in_commit_pkt(uint32_t epnum, bool firstpkt, const uint8_t *pbuf, uint32_t len);
|
||||
|
||||
|
||||
|
||||
/* check, if received data is in OUT endpoint */
|
||||
bool usb_ep_out_data_available(uint32_t epnum);
|
||||
|
||||
/* get data from EPxOUT. Length [bytes] is returned. */
|
||||
uint32_t usb_ep_out_get_data(uint32_t epnum, uint8_t *pbuf);
|
||||
|
||||
/* stall endpoint */
|
||||
void usb_ep_stall(uint32_t epnum);
|
||||
|
||||
/* remove stall condition from endpoint */
|
||||
void usb_ep_unstall(uint32_t epnum);
|
||||
|
||||
/* returns true if endpoint is stalled */
|
||||
bool usb_ep_is_stalled(uint32_t epnum);
|
||||
|
||||
/* receive a package via EP0OUT. It is allowed to be longer than 8 bytes */
|
||||
/* important: ensure, that pbuf has a buffer size with a multiple of 8 Bytes */
|
||||
/* returns received length */
|
||||
uint8_t usb_ep_out_get_data_long(uint8_t *pbuf, uint8_t maxlen);
|
||||
|
||||
/* send a package via EP0IN which is longer as 7 bytes */
|
||||
//void usb_ep_in_commit_pkt_long(uint32_t epnum, const uint8_t *pbuf, uint8_t len);
|
||||
void usb_ep_in_commit_pkt_long(uint32_t epnum, const uint8_t *pbuf, uint8_t len, bool sendshortpkt);
|
||||
|
||||
|
||||
|
||||
/* Handle a Control transfer without data stage => transmits a ACK in status stage */
|
||||
void usb_control_acknowledge(void);
|
||||
|
||||
/* Handle a Control IN transfer */
|
||||
bool usb_control_dataIn(const uint8_t *pbuf, uint8_t len);
|
||||
|
||||
/* Handle a Control OUT transfer */
|
||||
uint8_t usb_control_dataOut(uint8_t *pbuf, uint8_t maxlen);
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,40 @@
|
||||
/***************************************************************************//*
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __USB_CONFIG_H__
|
||||
#define __USB_CONFIG_H__
|
||||
|
||||
/* Set to 1 to enable 2 additional endpoints.
|
||||
If set to 0, only control transfers will be supported, because only EP0OUT and EP0IN are present
|
||||
*/
|
||||
#define USB_ENABLE_EP1OUT_EP1IN (1)
|
||||
|
||||
#define USB_ENABLE_HID
|
||||
|
||||
/*
|
||||
Enable this define, if the USB low level protocol handling should be done in RAM.
|
||||
This is e.g. mandatory if Flash programming is used, otherwise USB will not be
|
||||
responsive anymore when flash is erased or programmed, because Flash accesses will
|
||||
be stalled.
|
||||
*/
|
||||
#define USB_PROTOCOL_HANDLING_IN_RAM
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,162 @@
|
||||
/***************************************************************************//*
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __USB_DESCRIPTORS_H__
|
||||
#define __USB_DESCRIPTORS_H__
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include "usb.h"
|
||||
|
||||
/* include this file only once! */
|
||||
|
||||
#define WBVAL(x) (x & 0xFF),((x >> 8) & 0xFF)
|
||||
|
||||
|
||||
/* report descriptor for HID keyboard */
|
||||
const uint8_t hid_report_descriptor[] =
|
||||
{
|
||||
0x05, 0x01, 0x09,
|
||||
0x06, 0xA1,
|
||||
0x01, 0x05,
|
||||
0x07, 0x19,
|
||||
0xE0, 0x29, 0xE7,
|
||||
0x15, 0x00,
|
||||
0x25, 0x01,
|
||||
0x75, 0x01, 0x95, 0x08, 0x81, 0x02, 0x95, 0x01,
|
||||
0x75, 0x08, 0x81, 0x01, 0x95, 0x03, 0x75, 0x01,
|
||||
0x05, 0x08, 0x19, 0x01, 0x29, 0x03, 0x91, 0x02,
|
||||
0x95, 0x05, 0x75, 0x01, 0x91, 0x01, 0x95, 0x06,
|
||||
0x75, 0x08, 0x15, 0x00, 0x26, 0xFF, 0x00, 0x05,
|
||||
0x07, 0x19, 0x00, 0x2A, 0xFF, 0x00, 0x81, 0x00,
|
||||
0xC0
|
||||
};
|
||||
|
||||
|
||||
const uint8_t device_descriptor[] =
|
||||
{
|
||||
0x12, /* descriptor length */
|
||||
0x01, /* descriptor type */
|
||||
WBVAL(0x0110), /* USB version */
|
||||
0x00, /* Devices class */
|
||||
0x00, /* Device sub class */
|
||||
0x00, /* Device sub sub class */
|
||||
0x08, /* max packet size (for EP0IN/OUT) */
|
||||
WBVAL(0x10C4), /* VID (low, high) */
|
||||
WBVAL(0x8944), /* PID */
|
||||
WBVAL(0x0100), /* DID */
|
||||
0x01, /* manufacturer string index */
|
||||
0x02, /* product string index */
|
||||
0x00, /* serial number string index */
|
||||
0x01 /* number of configurations */
|
||||
};
|
||||
|
||||
const uint8_t config_0_descriptor[] =
|
||||
{
|
||||
0x09, /* length of config descriptor */
|
||||
DESCRIPTOR_CONFIGURATION, /* descriptor type */
|
||||
0x12+7+9, 0x00, /* Config + Interface + Endpoints length (low, high) */
|
||||
0x01, /* number of interfaces */
|
||||
0x01, /* interface number */
|
||||
0x00, /* configuration string index */
|
||||
0xA0, /* attributes (buspowered = Bit7, Selfpowered = Bit6, RemoteWakeup = Bit 5) */
|
||||
50, /* power requirement (multiply by 2 to get current in mA) */
|
||||
|
||||
/* interface descriptor */
|
||||
0x09, /* length of interface descriptor */
|
||||
DESCRIPTOR_INTERFACE, /* descriptor type */
|
||||
0x00, /* Index of this interface (starts at 0) */
|
||||
0x00, /* Alternate setting */
|
||||
0x01, /* Number of Endpoints */
|
||||
0x03, /* Interface class */
|
||||
0x01, /* Interface sub class */
|
||||
0x01, /* Interface sub sub class */
|
||||
0x00, /* Interface descriptor string index */
|
||||
|
||||
/* HID descriptor - Keyboard */
|
||||
0x09, /* Length of this descriptor */
|
||||
DESCRIPTOR_HID, /* bDescriptorType */
|
||||
WBVAL(0x0100), /* 1.00 */ /* bcdHID */
|
||||
0x00, /* bCountryCode */
|
||||
0x01, /* bNumDescriptors */
|
||||
0x22, /* bDescriptorType */
|
||||
WBVAL(sizeof(hid_report_descriptor)), /* wDescriptorLength */
|
||||
|
||||
/* EP1IN */
|
||||
0x07, /* length of endpoint descriptor */
|
||||
DESCRIPTOR_ENDPOINT, /* descriptor type */
|
||||
0x81, /* Endpoint number and direction (Bit 7) */
|
||||
EPTYPE_INTERRUPT, /* Endpoint type */
|
||||
0x08, 0x00, /* Max packet size of this Endpoint (Low, High) */
|
||||
0x18 /* Polling Interval */
|
||||
};
|
||||
|
||||
const uint8_t string_0_descriptor[] =
|
||||
{
|
||||
0x04, /* length of string descriptor */
|
||||
DESCRIPTOR_STRING, /* descriptor type */
|
||||
0x09,
|
||||
0x04
|
||||
};
|
||||
|
||||
const uint8_t string_1_descriptor[] =
|
||||
{
|
||||
0x14, /* length of string descriptor */
|
||||
DESCRIPTOR_STRING, /* descriptor type */
|
||||
'L', 0,
|
||||
'E', 0,
|
||||
'M', 0,
|
||||
'C', 0,
|
||||
'U', 0,
|
||||
'.', 0,
|
||||
'O', 0,
|
||||
'R', 0,
|
||||
'G', 0,
|
||||
};
|
||||
|
||||
const uint8_t string_2_descriptor[] =
|
||||
{
|
||||
0x1A, /* length of string descriptor */
|
||||
DESCRIPTOR_STRING, /* descriptor type */
|
||||
'I', 0,
|
||||
't', 0,
|
||||
' ', 0,
|
||||
'w', 0,
|
||||
'o', 0,
|
||||
'r', 0,
|
||||
'k', 0,
|
||||
's', 0,
|
||||
' ', 0,
|
||||
':', 0,
|
||||
'-', 0,
|
||||
')', 0,
|
||||
};
|
||||
|
||||
const uint8_t hid_descriptor[] =
|
||||
{
|
||||
0x09,
|
||||
DESCRIPTOR_HID,
|
||||
0x10, 0x01, /* USB version */
|
||||
0x00, /* Localization*/
|
||||
};
|
||||
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,63 @@
|
||||
/****************************************************************************
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __USB_HELPERFUNCTIONS_H__
|
||||
#define __USB_HELPERFUNCTIONS_H__
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
/* from bit twiddling hacks. Did not check efficiency.
|
||||
My guess is, that the standard assembly way using 8 consecutive ROR/ROL instructions is faster!
|
||||
so: TODO check and optimize
|
||||
*/
|
||||
static inline uint8_t bitreverse(uint8_t b)
|
||||
{
|
||||
return ((b * 0x0802LU & 0x22110LU) | (b * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16;
|
||||
}
|
||||
|
||||
|
||||
/* TODO: Make this nice and efficient! Maybe implement this directly in CM0+ assembly
|
||||
using uint32_t instead of uint8_t can also speed things up
|
||||
See: http%3A%2F%2Fwww.usb.org%2Fdevelopers%2Fwhitepapers%2Fcrcdes.pdf&ei=
|
||||
AKrAUtuBD4WMtQakyoCwAQ&usg=AFQjCNE71tY6EAUjJKXWbjtbNvDTiOKKlg&bvm=bv.
|
||||
58187178,d.Yms&cad=rja
|
||||
*/
|
||||
static uint16_t crc16(uint16_t crc, uint8_t c)
|
||||
{
|
||||
uint8_t i;
|
||||
|
||||
for (i=0; i<8; i++)
|
||||
{
|
||||
if ((crc ^ c) & 1)
|
||||
{
|
||||
crc = (crc >> 1) ^ 0xa001; /* 0xa001*/
|
||||
}
|
||||
else
|
||||
{
|
||||
crc >>= 1;
|
||||
}
|
||||
c >>= 1;
|
||||
}
|
||||
return crc;
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,104 @@
|
||||
/****************************************************************************
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#include "usb_stack.h"
|
||||
#include "usb.h"
|
||||
#include "usb_helperfunctions.h"
|
||||
#include "usb_config.h"
|
||||
#include "usb_hid.h"
|
||||
|
||||
//#include "em_device.h" /* removeme. Only needed for debugging */
|
||||
|
||||
|
||||
|
||||
#ifdef USB_ENABLE_HID
|
||||
|
||||
/* HID requests */
|
||||
#define HID_GET_REPORT (0x01) /* mandatory */
|
||||
#define HID_GET_IDLE (0x02) /* optional */
|
||||
#define HID_GET_PROTOCOL (0x03) /* mandatory for BOOT devices */
|
||||
#define HID_SET_REPORT (0x09) /* mandatory if USB device does not use EP1OUT */
|
||||
#define HID_SET_IDLE (0x0a) /* optional */
|
||||
#define HID_SET_PROTOCOL (0x0b) /* mandatory for BOOT devices */
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
bool usbhid_got_setup_cmd(const setupData_t *psetupdata)
|
||||
{
|
||||
uint8_t response[8];
|
||||
bool doStall;
|
||||
|
||||
doStall = false;
|
||||
|
||||
switch(psetupdata->bRequest)
|
||||
{
|
||||
case HID_GET_REPORT:
|
||||
doStall = !HID_GetReport(psetupdata->wValue >> 8);
|
||||
break;
|
||||
case HID_SET_REPORT:
|
||||
doStall = !HID_SetReport(psetupdata->wValue >> 8);
|
||||
if (!doStall)
|
||||
{
|
||||
//usb_control_acknowledge(); //TODO: REMOVE UNCOMMENT!!!
|
||||
}
|
||||
break;
|
||||
case HID_GET_PROTOCOL:
|
||||
doStall = !HID_GetProtocol(response);
|
||||
if (!doStall)
|
||||
{
|
||||
usb_control_dataIn(response, 1);
|
||||
}
|
||||
break;
|
||||
case HID_SET_PROTOCOL:
|
||||
doStall = !HID_SetProtocol(psetupdata->wValue >> 8); /* low byte of value is interface number */
|
||||
if (!doStall)
|
||||
{
|
||||
usb_control_acknowledge();
|
||||
}
|
||||
break;
|
||||
case HID_GET_IDLE:
|
||||
doStall = !HID_GetIdle(response);
|
||||
if (!doStall)
|
||||
{
|
||||
usb_control_dataIn(response, 1);
|
||||
}
|
||||
break;
|
||||
case HID_SET_IDLE:
|
||||
doStall = !HID_SetIdle(psetupdata->wValue >> 8); /* low byte of value is interface number */
|
||||
if (!doStall)
|
||||
{
|
||||
usb_control_acknowledge();
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (doStall)
|
||||
{
|
||||
usb_ep_stall(USB_EP0OUT);
|
||||
usb_ep_stall(USB_EP0IN);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,61 @@
|
||||
/***************************************************************************//*
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __USB_HID_H__
|
||||
#define __USB_HID_H__
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include "usb.h"
|
||||
#include "usb_config.h"
|
||||
|
||||
#ifdef USB_ENABLE_HID
|
||||
|
||||
|
||||
/* HID Report Types */
|
||||
#define HID_RPRT_INPUT (0x01)
|
||||
#define HID_RPRT_OUTPUT (0x02)
|
||||
#define HID_RPRT_FEATURE (0x03)
|
||||
|
||||
|
||||
/* HID Requests functions, need to be defined by the user! */
|
||||
/* They are not implemented as callback functions to get */
|
||||
/* a more efficient code.*/
|
||||
/* The functions should false, if they were not handled */
|
||||
/* return TRUE if function was handled */
|
||||
extern bool HID_GetReport (uint8_t reportType);
|
||||
extern bool HID_SetReport (uint8_t reportType);
|
||||
extern bool HID_GetIdle (uint8_t *pIdleTime);
|
||||
extern bool HID_SetIdle (uint8_t idleTime);
|
||||
extern bool HID_GetProtocol (uint8_t *pProtocol);
|
||||
extern bool HID_SetProtocol (uint8_t protocol);
|
||||
|
||||
|
||||
|
||||
bool usbhid_got_setup_cmd(const setupData_t *psetupdata);
|
||||
|
||||
|
||||
|
||||
#else
|
||||
#warning "HID disabled, but hid includes compiled"
|
||||
#endif
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,484 @@
|
||||
//****************************************************************************
|
||||
//
|
||||
// Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
// Copyright (C) 2014 http://lemcu.org
|
||||
//
|
||||
// This library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU General Public License version 3.0 as
|
||||
// published by the Free Software Foundation and appearing in the file
|
||||
// LICENSE.txt included in the packaging of this file.
|
||||
//
|
||||
// In addition, as a special exception, http://lemcu.org gives you certain
|
||||
// additional rights. These rights are described in the lemcu.org GPL
|
||||
// Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
// package.
|
||||
//
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY// without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
//
|
||||
//**************************************************************************/
|
||||
|
||||
#if defined ( __IAR_SYSTEMS_ASM__ )
|
||||
NAME usb_internal_bitbangusb
|
||||
|
||||
;; For a description of the purpose of the following part, look here:
|
||||
;; http://supp.iar.com/Support/?note=80737&from=search+result
|
||||
;; (TOPIC: IAR assembler ramfunction)
|
||||
#define SHT_PROGBITS 0x1
|
||||
#define SHF_WRITE 0x1
|
||||
#define SHF_EXECINSTR 0x4
|
||||
RSEG MYCODE:CODE:NOROOT(2)
|
||||
SECTION_TYPE SHT_PROGBITS, SHF_WRITE | SHF_EXECINSTR
|
||||
THUMB
|
||||
EXTERN usb_protocol_handle
|
||||
|
||||
PUBLIC GPIO_ODD_IRQHandler
|
||||
PUBLIC usb_transmit
|
||||
PUBLIC protocol_handled
|
||||
#else
|
||||
.syntax unified
|
||||
.arch armv6-m
|
||||
|
||||
.SECTION .functioninRAM
|
||||
|
||||
.thumb
|
||||
.thumb_func
|
||||
|
||||
.extern usb_protocol_handle
|
||||
|
||||
|
||||
|
||||
.global GPIO_ODD_IRQHandler
|
||||
.global usb_transmit
|
||||
.global protocol_handled
|
||||
|
||||
|
||||
.type GPIO_ODD_IRQHandler, %function // IMPORTANT FOR GCC to get lsb of address set to 1
|
||||
.type protocol_handled, %function // IMPORTANT FOR GCC to get lsb of address set to 1
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
|
||||
#define USBEP_OFS_SETUP ( 0)
|
||||
#define USBEP_OFS_EP0OUT (16)
|
||||
#define USBEP_OFS_EP0IN (32)
|
||||
#define USBEP_OFS_EP1OUT (48)
|
||||
#define USBEP_OFS_EP1IN (64)
|
||||
|
||||
#define USBEP_SOFS_STAT (12)
|
||||
#define USBEP_SOFS_LEN (13)
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
// This is the Interrupt handler, triggered by a rising edge on D+ (PC1)
|
||||
// It is implemented in assembly to minimize latency
|
||||
// (=> avoid branch from C code to ASM and addition of veneer code)
|
||||
|
||||
// This is called for each received USB data packet. received data is unstuffed.
|
||||
// The data is decoded to R8, R9, R10
|
||||
// Each data byte is in reversed bitorder. For data bytes, the bitorder
|
||||
// needs to be reversed. For PIDs, etc. bitorder reversal is not mandatory
|
||||
// The received bitcount is written to R11
|
||||
// BYTE ORDER:
|
||||
// R8. 24-31 Byte 0
|
||||
// R8. 16-23 Byte 1
|
||||
// R8. 8-15 Byte 2
|
||||
// R8. 0- 7 Byte 3
|
||||
// R9. 24-31 Byte 4
|
||||
// R9. 16-23 Byte 5
|
||||
// R9. 8-15 Byte 6
|
||||
// R9. 0- 7 Byte 7
|
||||
// R10.24-31 Byte 8
|
||||
// R10.16-23 Byte 9
|
||||
// R10. 8-15 Byte 10
|
||||
// R10. 0- 7 Byte 11
|
||||
//
|
||||
// An interupt saves the following register on stack:
|
||||
// - R0-R3, R12
|
||||
// - LR, PC & xPSR
|
||||
GPIO_ODD_IRQHandler:
|
||||
|
||||
NOP
|
||||
NOP
|
||||
|
||||
MOV r0, r8
|
||||
MOV r1, r9
|
||||
MOV r2, r10
|
||||
MOV r3, r11
|
||||
PUSH {r0-r7}
|
||||
MOV r0, LR
|
||||
PUSH {r0}
|
||||
|
||||
|
||||
MOVS r3, #3
|
||||
MOVS r4, #0xff // preload with 0xff to avoid bitunstuffing after start
|
||||
MOVS r5, #0x80
|
||||
LSLS r5, r5, #24
|
||||
MOVS r0, #0
|
||||
MOV r11, r0
|
||||
MOVS r1, #1
|
||||
MOV r12, r1
|
||||
|
||||
// r1 = 1
|
||||
// r3 = 3
|
||||
// r5 = (1<<13)
|
||||
// r7 = &GPIO_PE_DOUTSET
|
||||
|
||||
LDR r7, GPIO_PC_DIN // r7 = address of register GPIO_PC_DIN
|
||||
|
||||
// wait until a 1 is detected. Unfolded loop to be able to detect a timeout condition
|
||||
usb_sync_wait_while_0:
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BEQ usb_sync_found
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BEQ usb_sync_found
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BEQ usb_sync_found
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BEQ usb_sync_found
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BEQ usb_sync_found
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BEQ usb_sync_found
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BEQ usb_sync_found
|
||||
|
||||
B protocol_handled // State was zero for more than 1 bittime => exit (timeout condition)
|
||||
|
||||
|
||||
usb_sync_found:
|
||||
// delay 1 bittime
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BNE usb_sync_wait_while_0
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BNE usb_sync_wait_while_0
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BNE usb_sync_wait_while_0
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BNE usb_sync_wait_while_0
|
||||
LDR r0, [r7] // read port state
|
||||
TST r0, r1
|
||||
BNE usb_sync_wait_while_0
|
||||
NOP
|
||||
|
||||
// check, if bitstate is still 1 (=> if 2 consecutive 1 bits received)
|
||||
LDR r2, [r7] // read port state
|
||||
TST r2, r1
|
||||
BNE usb_sync_wait_while_0
|
||||
|
||||
BL _delay_13
|
||||
|
||||
// here: We are in the middle of the very first bit of this packet
|
||||
// r0 = port state current
|
||||
// r1 = 1
|
||||
// r2 = port state old
|
||||
// r3 = 3
|
||||
// r4/5/6 = received data (parallel)
|
||||
// r7 = address of GPIO_PC_DIN
|
||||
// r11 = bitcounter
|
||||
MOVS r1, #0
|
||||
|
||||
rcv_bits: LDR r0, [r7] // read port state
|
||||
ANDS r0, r3 // check for SE0 and mask out unneeded bits
|
||||
BEQ se0_detected // end of receive loop!
|
||||
EORS r2, r0 // NRZ decoding (XOR bitstate with old bitstate) => inverts data, USB uses NRZI!
|
||||
LSRS r2, r2, #1
|
||||
ADCS r4, r4, r4 // Shift carry into receive chain
|
||||
ADCS r5, r5, r5
|
||||
ADCS r6, r6, r6
|
||||
ADD r11, r11, r12 // increment bitcounter
|
||||
MOV r2, r0 // Store old bitstate
|
||||
NOP
|
||||
LSLS r1, r1, #1 // Shift bitunstuffing EOR mask
|
||||
LSLS r0, r4, #26 // Mask out last 6 received bits
|
||||
EORS r0, r0, r1 // check if 6 consecutive 0s have been received
|
||||
BNE rcv_bits
|
||||
|
||||
// here we get when bitunstuffing needs to be done
|
||||
// 15/16 cycles over
|
||||
NOP //16
|
||||
LDR r2, [r7] // 1 // read port state to save it as "old" bitstate
|
||||
BL _delay_11 //12
|
||||
MOVS r1, #1 //13 // save bitunstuffing EOR mask
|
||||
LSLS r1, r1, #26 //14
|
||||
B rcv_bits //16
|
||||
|
||||
|
||||
|
||||
|
||||
se0_detected:
|
||||
// left align data (rough: 32 Bit steps)
|
||||
MOV r0, r11
|
||||
CMP r0, #64
|
||||
BHI se0_detected_align_0
|
||||
|
||||
MOVS r6, r5
|
||||
MOVS r5, r4
|
||||
SUBS r4, r4, r4 // not mandatory
|
||||
|
||||
CMP r0, #32
|
||||
BHI se0_detected_align_0
|
||||
|
||||
MOVS r6, r5
|
||||
MOVS r5, r4
|
||||
SUBS r4, r4, r4 // not mandatory
|
||||
|
||||
// left align data (fine alignment: 0..31 bits)
|
||||
se0_detected_align_0: MOV r0, r11
|
||||
MOVS r1, #31
|
||||
ANDS r1, r1, r0 // r1 = bitcount & 31
|
||||
|
||||
CMP r1, #0
|
||||
BEQ se0_alginment_done
|
||||
|
||||
MOVS r0, #0
|
||||
MVNS r0, r0 // r0 = 0xffffffff
|
||||
LSRS r0, r0, r1 // 8 => 0x00ffffff, 24 => 0x000000ff r0 = Mask of bytes to copy from lower word to upper one
|
||||
|
||||
RORS r6, r6, r1 //
|
||||
BICS r6, r6, r0 // r6 = r6 and not r0 (reset lower bytes to 0)
|
||||
|
||||
RORS r5, r5, r1 //
|
||||
MOVS r2, r5
|
||||
ANDS r2, r2, r0
|
||||
ORRS r6, r6, r2 //
|
||||
BICS r5, r5, r0 // r6 = r6 and not r0 (reset lower bytes to 0)
|
||||
|
||||
RORS r4, r4, r1 //
|
||||
MOVS r2, r4
|
||||
ANDS r2, r2, r0
|
||||
ORRS r5, r5, r2
|
||||
BICS r4, r4, r0 // not mandatory
|
||||
|
||||
|
||||
|
||||
// Invert data (NRZ => NRZI)
|
||||
se0_alginment_done: MVNS r0, r4
|
||||
MOV r10, r0
|
||||
MVNS r0, r5
|
||||
MOV r9, r0
|
||||
MVNS r0, r6
|
||||
MOV r8, r0
|
||||
|
||||
LDR r0, LABEL_USB_PROT_HDL
|
||||
BX r0 // Jump to protocol state machine code located in Flash
|
||||
|
||||
|
||||
protocol_handled:
|
||||
// This was for debugging. enable it, if you want to debug host packets only
|
||||
// MOVS r5, #255
|
||||
//delayloop:
|
||||
// SUBS r5, r5, #1
|
||||
// BNE delayloop
|
||||
|
||||
// acknowledge GPIO interrupt
|
||||
LDR r6, GPIO_IFC
|
||||
MOVS r5, #2
|
||||
STR r5, [r6]
|
||||
|
||||
POP {r0}
|
||||
MOV LR, r0
|
||||
|
||||
POP {r0-r7}
|
||||
MOV r8, r0
|
||||
MOV r9, r1
|
||||
MOV r10, r2
|
||||
MOV r11, r3 // r0-r3 are restored by ISR return
|
||||
BX LR // return
|
||||
|
||||
|
||||
////////////////////////////////////////
|
||||
|
||||
|
||||
#if defined ( __IAR_SYSTEMS_ASM__ )
|
||||
DATA
|
||||
ALIGNROM 2
|
||||
GPIO_PC_DIN: DC32 0x40006064 ; GPIO_PC_DIN
|
||||
GPIO_PE_DOUTSET DC32 0x400060a0 ; GPIO_PE_DOUTSET.DOUTSET
|
||||
GPIO_IFC: DC32 0x4000611c ; GPIO.IFC
|
||||
LABEL_USB_PROT_HDL: DC32 usb_protocol_handle
|
||||
//GPIO_PB_TOGGLE: DC32 0x4000603C ; REMOVEME
|
||||
|
||||
#else
|
||||
.BALIGN 4
|
||||
GPIO_PC_DIN: .INT 0x40006064 // GPIO_PC_DIN
|
||||
GPIO_PE_DOUTSET: .INT 0x400060a0 // GPIO_PE_DOUTSET.DOUTSET
|
||||
GPIO_IFC: .INT 0x4000611c // GPIO.IFC
|
||||
LABEL_USB_PROT_HDL: .INT usb_protocol_handle
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
#if defined ( __IAR_SYSTEMS_ASM__ )
|
||||
CODE
|
||||
THUMB
|
||||
#else
|
||||
.SECTION .functioninRAM
|
||||
.THUMB
|
||||
#endif
|
||||
// This function transmits a USB packet as response to the host
|
||||
// Used for : ACK, NAK, STALL, DATA0 & DATA1 PIDs
|
||||
// Parameters:
|
||||
// r0/r1/r2 = Data to transmit
|
||||
// r5 = Bitcount
|
||||
// The Bitorder of the transmission is the right one (no bitreversal as in receive function)
|
||||
// transmit order:
|
||||
// r0.0-7 => r0.8-15 => r0.16-23 => r0.24-31 =>
|
||||
// r1.0-7 => r1.8-15 => r1.16-23 => r1.24-31 =>
|
||||
// r2.0-7 => r2.8-15 => r2.16-23 => r2.24-31
|
||||
usb_transmit:
|
||||
MOV r7, LR
|
||||
PUSH {r7}
|
||||
// Switch PC0 & PC1 to output
|
||||
LDR r7, GPIO_PC_BASE
|
||||
LDR r3, [r7, #4] // read pin mode low register
|
||||
ADDS r3, r3, #0x33 // mode Input = 0x11, Output = 0x44
|
||||
STR r3, [r7, #4] // writepin mode low register
|
||||
// IO state = push pull & IDLE (D-=1 D+=0)
|
||||
|
||||
// 1.) Send SYNC Byte
|
||||
MOVS r3, #0x03 // bitmask for toggling IO pin
|
||||
MOVS r4, #7
|
||||
usb_tx_syncloop: STR r3, [r7, #24] // Toggle IOs to transmit a 0
|
||||
BL _delay_12
|
||||
SUBS r4, r4, #1
|
||||
BNE usb_tx_syncloop
|
||||
//15
|
||||
// transmit a "1" - last bit of SYNC sequence
|
||||
BL _delay_12
|
||||
|
||||
// 2.) Send data given in registers r0/r1/r2 and bitcount in r5
|
||||
// Here all bits get transmitted. Bitstuffing is also applied
|
||||
// The minimal version of this would only need 6 cycles
|
||||
MOVS r4, #5 // consecutive 1-Bit counter (used for bitstuffing). Last transmitted Bit was 1, so initialize it with 5 rather than 6
|
||||
MOVS r6, #32 // Needed to check if a new 32 Bit word should be transmitted
|
||||
usb_tx_bitloop: LSRS r0, r0, #1 // shift out bit to carry flag for transmitting
|
||||
BCS usb_txbitloop_send1 //do nothing if bit is 1 (only a zero causes toggling
|
||||
usb_txbitloop_send0: STR r3, [r7, #24] // Toggle IOs to transmit a 0
|
||||
MOVS r4, #6 // Reset 1-Bit counter
|
||||
B usb_txbitloop_sent1
|
||||
usb_txbitloop_send1: SUBS r4, #1
|
||||
BEQ usb_tx_sendstuffbit
|
||||
usb_tx_bitstutt_ret: NOP // equalize execution time for 2 branch paths
|
||||
usb_txbitloop_sent1: SUBS r5, r5, #1
|
||||
BEQ usb_tx_send_eop // final word transmitted
|
||||
SUBS r6, r6, #1
|
||||
BEQ usb_txbit_nextword
|
||||
NOP
|
||||
NOP
|
||||
NOP
|
||||
NOP
|
||||
B usb_tx_bitloop
|
||||
|
||||
// select next word for transmission
|
||||
usb_txbit_nextword: MOVS r0, r1
|
||||
MOVS r1, r2
|
||||
MOVS r6, #32
|
||||
B usb_tx_bitloop
|
||||
|
||||
// Send stuffbit
|
||||
// 4 cycles over since last bit
|
||||
usb_tx_sendstuffbit: BL _delay_11
|
||||
MOVS r4, #6 // Reset 1-Bit counter
|
||||
STR r3, [r7, #24] // Toggle IOs to transmit a 0
|
||||
B usb_tx_bitstutt_ret
|
||||
|
||||
// send EOP (2*SE0)
|
||||
// 7 cycles over since last bit
|
||||
usb_tx_send_eop:
|
||||
BL _delay_9
|
||||
STR r3, [r7, #20] // write to GPIO_PC_DOUTCLR to set D+ and D- to LOW
|
||||
BL _delay_10
|
||||
BL _delay_10
|
||||
BL _delay_10
|
||||
|
||||
MOVS r1, #1
|
||||
STR r1, [r7, #16] // Set D- back to HIGH
|
||||
|
||||
// Switch PC0 & PC1 to input
|
||||
LDR r7, GPIO_PC_BASE
|
||||
LDR r0, [r7, #4] // read pin mode low register
|
||||
SUBS r0, r0, #0x33 // set from 0x44 to 0x11 (push pull to input)
|
||||
STR r0, [r7, #4] // writepin mode low register
|
||||
|
||||
// // delay some time for easier debugging
|
||||
// MOVS r5, #255
|
||||
//delayloop_x: MOVS r4, #6 // reset 1-bit counter
|
||||
// SUBS r5, r5, #1
|
||||
// BNE delayloop_x
|
||||
POP {r0}
|
||||
MOV LR, r0
|
||||
BX LR
|
||||
|
||||
// some delay functions:
|
||||
_delay_14: NOP
|
||||
_delay_13: NOP
|
||||
_delay_12: NOP
|
||||
_delay_11: NOP
|
||||
_delay_10: NOP
|
||||
_delay_9: NOP
|
||||
_delay_8: NOP
|
||||
_delay_7: NOP
|
||||
_delay_6: NOP
|
||||
_delay_5: BX LR
|
||||
|
||||
|
||||
#if defined ( __IAR_SYSTEMS_ASM__ )
|
||||
|
||||
DATA
|
||||
ALIGNROM 2
|
||||
GPIO_PC_BASE: DC32 0x40006048 ; GPIO_PC_DIN - This is redundant, has already been defined in the RX function
|
||||
GPIO_PE_DOUTSET_ DC32 0x400060a0 ; GPIO_PE_DOUTSET.DOUTSET
|
||||
|
||||
END
|
||||
|
||||
#else
|
||||
|
||||
.BALIGN 4
|
||||
GPIO_PC_BASE: .INT 0x40006048 // GPIO_PC_DIN - This is redundant, has already been defined in the RX function
|
||||
GPIO_PE_DOUTSET_: .INT 0x400060a0 // GPIO_PE_DOUTSET.DOUTSET
|
||||
|
||||
.END
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
TODO:
|
||||
- Flag endpoint status based on Host reply
|
||||
- interpret CRC5 ??
|
||||
- detect RESET condition on bus (very long SE0 phase, check USB spec. for duration). This should reset the usb address
|
||||
- RESET = SE0 for >= 10ms
|
||||
|
||||
- codesize optimization:
|
||||
* use branches to identical code secitions
|
||||
*/
|
||||
|
||||
@@ -0,0 +1,59 @@
|
||||
/****************************************************************************
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
/*
|
||||
* Low level internal functions.
|
||||
* These functions are internal.
|
||||
*/
|
||||
|
||||
//#include "em_device.h"
|
||||
#include <stdint.h>
|
||||
//#include "em_chip.h"
|
||||
//#include "em_int.h"
|
||||
#include "gpio.h"
|
||||
//#include "em_cmu.h"
|
||||
|
||||
#include "usb_config.h"
|
||||
|
||||
/* Endpoint buffers
|
||||
Offset 0: SETUP packets
|
||||
Offset 16: EP0OUT
|
||||
Offset 32: EP0IN
|
||||
(Offset 48: EP1OUT)
|
||||
(Offset 64: EP1IN)
|
||||
|
||||
Offsets within one of theese buffers:
|
||||
0-11: Raw data
|
||||
Offset 12: _STAT Status empty/filled (0x00/0x01)
|
||||
Offset 13: _LEN Length of data in buffer
|
||||
14 & 15 are free for future used - would be added anyway by codegen tools for alignment
|
||||
*/
|
||||
volatile uint8_t usb_ep_buffers[ (3+2*USB_ENABLE_EP1OUT_EP1IN)*16 ];
|
||||
|
||||
/* low level protocol handling state */
|
||||
/* Bit 0- 7 = state machine index*/
|
||||
/* Bit 8-15 = last received USB Address (bitreversed: a0 a1 a2 a3 a4 a5 a6 0) */
|
||||
/* Bit 16-23 = last received USB Endpoint (bitreversed: e0 e1 e2 e3 0 0 0 0) */
|
||||
/* Bit 24-31 = not used yet */
|
||||
uint32_t USB_PROT_STATE;
|
||||
|
||||
|
||||
|
||||
@@ -0,0 +1,60 @@
|
||||
/***************************************************************************//*
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __USB_INTERNAL_H__
|
||||
#define __USB_INTERNAL_H__
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include "usb_config.h"
|
||||
|
||||
#define USB_EPBUF_OFFSET_SETUP_BUF ( 0)
|
||||
#define USB_EPBUF_OFFSET_EP0OUT_BUF (16)
|
||||
#define USB_EPBUF_OFFSET_EP0IN_BUF (32)
|
||||
#define USB_EPBUF_OFFSET_EP1OUT_BUF (48)
|
||||
#define USB_EPBUF_OFFSET_EP1IN_BUF (64)
|
||||
|
||||
#define USB_EPBUF_SUBOFFSET_STAT (12)
|
||||
#define USB_EPBUF_SUBOFFSET_LEN (13)
|
||||
|
||||
|
||||
/* Endpoint buffers
|
||||
Offset 0: SETUP packets
|
||||
Offset 16: EP0OUT
|
||||
Offset 32: EP0IN
|
||||
(Offset 48: EP1OUT)
|
||||
(Offset 64: EP1IN)
|
||||
|
||||
Sub-offsets within one of these buffers:
|
||||
0-11: Raw data
|
||||
Offset 12: _STAT Status empty/filled (0x00/0x01)
|
||||
Offset 13: _LEN Length of data in buffer
|
||||
14 & 15 are free for future used - would be added anyway by codegen tools for alignment
|
||||
*/
|
||||
|
||||
|
||||
/* Endpoint buffers */
|
||||
extern volatile uint8_t usb_ep_buffers[ (3+2*USB_ENABLE_EP1OUT_EP1IN)*16 ];
|
||||
|
||||
extern uint32_t USB_PROT_STATE;
|
||||
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,329 @@
|
||||
#include "usb_config.h"
|
||||
|
||||
#if defined ( __IAR_SYSTEMS_ASM__ )
|
||||
NAME usb_internal_prot_handling
|
||||
#ifdef USB_PROTOCOL_HANDLING_IN_RAM
|
||||
#define SHT_PROGBITS 0x1
|
||||
#define SHF_WRITE 0x1
|
||||
#define SHF_EXECINSTR 0x4
|
||||
RSEG MYCODE:CODE:NOROOT(2)
|
||||
SECTION_TYPE SHT_PROGBITS, SHF_WRITE | SHF_EXECINSTR
|
||||
THUMB
|
||||
#else
|
||||
section CODE:CODE (2)
|
||||
CODE
|
||||
#endif
|
||||
|
||||
THUMB
|
||||
|
||||
EXTERN usb_dev_address
|
||||
EXTERN USB_PROT_STATE
|
||||
EXTERN usb_ep_buffers
|
||||
EXTERN protocol_handled
|
||||
EXTERN usb_transmit
|
||||
|
||||
|
||||
PUBLIC usb_protocol_handle
|
||||
#else
|
||||
.syntax unified
|
||||
.arch armv6-m
|
||||
#ifdef USB_PROTOCOL_HANDLING_IN_RAM
|
||||
.THUMB
|
||||
.section .functioninRAM
|
||||
#else
|
||||
.BALIGN 4
|
||||
.TEXT
|
||||
#endif
|
||||
.THUMB
|
||||
|
||||
.EXTERN usb_dev_address
|
||||
.EXTERN USB_PROT_STATE
|
||||
.EXTERN usb_ep_buffers
|
||||
.EXTERN protocol_handled
|
||||
.EXTERN usb_transmit
|
||||
|
||||
|
||||
.GLOBAL usb_protocol_handle
|
||||
|
||||
.type usb_protocol_handle, %function // IMPORTANT FOR GCC to get lsb of address set to 1
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
|
||||
/* Endpoint buffer offsets and suboffsets*/
|
||||
#define USBEP_OFS_SETUP ( 0)
|
||||
#define USBEP_OFS_EP0OUT (16)
|
||||
#define USBEP_OFS_EP0IN (32)
|
||||
#define USBEP_OFS_EP1OUT (48)
|
||||
#define USBEP_OFS_EP1IN (64)
|
||||
#define USBEP_SOFS_STAT (12)
|
||||
#define USBEP_SOFS_LEN (13)
|
||||
|
||||
|
||||
/* some internal C-Style MACROs */
|
||||
#define REV2(x) ((((x)&1)<<1) | (((x)>>1)&1))
|
||||
#define REV4(x) ((REV2(x)<<2) | (REV2((x)>>2)))
|
||||
#define REV8(x) ((REV4(x)<<4) | (REV4((x)>>4)))
|
||||
#define CREATE_PID(x) (x & 0x0F) | (((~x) & 0x0f)<<4)
|
||||
|
||||
/* define Bitreversed PIDs */
|
||||
#define USB_TOKEN_BR_OUT REV8(CREATE_PID( 0x01 ))
|
||||
#define USB_TOKEN_BR_IN REV8(CREATE_PID( 0x09 ))
|
||||
#define USB_TOKEN_BR_SETUP REV8(CREATE_PID( 0x0d ))
|
||||
#define USB_TOKEN_BR_DATA0 REV8(CREATE_PID( 0x03 ))
|
||||
#define USB_TOKEN_BR_DATA1 REV8(CREATE_PID( 0x0b ))
|
||||
#define USB_TOKEN_BR_ACK REV8(CREATE_PID( 0x02 ))
|
||||
#define USB_TOKEN_BR_NAK REV8(CREATE_PID( 0x0a ))
|
||||
|
||||
/* define PIDs used for transmit (not bitreversed) */
|
||||
#define USB_TOKEN_ACK CREATE_PID( 0x02 )
|
||||
#define USB_TOKEN_NAK CREATE_PID( 0x0a )
|
||||
#define USB_TOKEN_STALL CREATE_PID( 0x0e )
|
||||
|
||||
|
||||
|
||||
// The following registers are saved externally on stack:
|
||||
// r0-r11
|
||||
// Registers that are not allowed to be modified:
|
||||
// r12, LR
|
||||
|
||||
// Input data:
|
||||
// -----------
|
||||
// r11 = received bitcount
|
||||
// r8...r10 = received data
|
||||
//
|
||||
|
||||
// Output data:
|
||||
// ------------
|
||||
// none
|
||||
|
||||
// A complete packet was received.
|
||||
// Now do some protocol handling
|
||||
// 1.) Identify PID R8.24-31
|
||||
usb_protocol_handle:
|
||||
|
||||
LDR r7, ASM_USB_PROT_STATE // r7 = pointer to protocol state variable
|
||||
LDRB r6, [r7] // r6 = state machine state
|
||||
LDRB r5, [r7, #1] // r5 = Address from state variable
|
||||
LDRB r4, [r7, #2] // r4 = Endpoint from state variable
|
||||
LDR r3, ASM_USB_DEV_ADDRESS
|
||||
LDRB r3, [r3] // r3 = USB Addresss of this device
|
||||
MOV r0, r8
|
||||
LSRS r0, r0, #24 // r0 now contains the PID only
|
||||
CMP r0, #USB_TOKEN_BR_SETUP // sends address and endpoint as parameter
|
||||
BEQ pid_setup
|
||||
CMP r0, #USB_TOKEN_BR_DATA0
|
||||
BEQ pid_data0
|
||||
CMP r0, #USB_TOKEN_BR_DATA1
|
||||
BEQ pid_data1
|
||||
CMP r0, #USB_TOKEN_BR_IN // sends address and endpoint as parameter
|
||||
BEQ pid_in
|
||||
CMP r0, #USB_TOKEN_BR_OUT // sends address and endpoint as parameter
|
||||
BEQ pid_out
|
||||
|
||||
jump_exit: LDR r0, LBL_PROT_HANDLED
|
||||
BX r0
|
||||
|
||||
|
||||
|
||||
////////////// Protocol handling statemachine
|
||||
// r7 = pointer to protocol state variable
|
||||
// r6 = state machine state (Byte 0)
|
||||
// r5 = Address & endpoint from state variable (Byte 1)
|
||||
pid_setup: MOVS r0, #0
|
||||
STRB r0, [r7] // Flag, that the next data package is a setup packet
|
||||
MOV r0, r8
|
||||
// extract address
|
||||
LSRS r1, r0, #16
|
||||
MOVS r2, #0xfe
|
||||
ANDS r1, r1, r2 // Mask out address bits a0-a6. Order: a0 a1 a2 a3 a4 a5 a6 0
|
||||
STRB r1, [r7, #1] // Store address in protocol state
|
||||
|
||||
// extract endpoint number
|
||||
LSRS r1, r0, #9
|
||||
MOVS r2, #0xf0
|
||||
ANDS r1, r1, r2
|
||||
STRB r1, [r7, #2] // Store endpoint in protocol state => TODO: APPLY MASK! Bitorder e0 e1 e2 e3 0 0 0 0
|
||||
|
||||
B jump_exit
|
||||
|
||||
pid_data0:
|
||||
pid_data1:
|
||||
// Check the usb address
|
||||
CMP r5, r3
|
||||
BNE jump_exit // This device is not addressed => Don't react on DATA PID
|
||||
|
||||
CMP r6, #0 // check if this is data is a setup phase or out phase
|
||||
BEQ pid_data_setup
|
||||
|
||||
// Here: data PID is for OUT phase
|
||||
|
||||
// Create pointer to addressed endpoint buffer
|
||||
LDR r6, ASM_USB_EP_BUFFERS
|
||||
|
||||
LDRB r1, [r7, #2] // Store endpoint in protocol state => TODO: APPLY MASK! Bitorder e0 e1 e2 e3 0 0 0 0
|
||||
CMP r1, #0
|
||||
BEQ pid_da_ep0_addressed
|
||||
ADDS r6, r6, #USBEP_OFS_EP1OUT
|
||||
B pid_da_ep1_addressed
|
||||
pid_da_ep0_addressed: ADDS r6, r6, #USBEP_OFS_EP0OUT
|
||||
pid_da_ep1_addressed:
|
||||
|
||||
LDRB r0, [r6, #USBEP_SOFS_STAT]
|
||||
// check if endpoint is stalled
|
||||
MOVS r2, #2
|
||||
TST r0, r2
|
||||
BNE send_STALL
|
||||
|
||||
// check if endpoint contains data
|
||||
MOVS r1, #1
|
||||
TST r0, r1 // if equal => Endpoint buffer is free
|
||||
BNE send_NAK
|
||||
|
||||
// here: buffer available and endpoint not stalled, so copy data to buffer...
|
||||
MOV r0, r8
|
||||
MOV r1, r9
|
||||
MOV r2, r10
|
||||
MOV r5, r6 // generate address to EP0buffer data
|
||||
STM r5!, {r0, r1, r2} // copy data to EP0OUT buffer
|
||||
MOV r0, r11 // EP0OUT_LEN is filled with the received bitcount (includes PID & CRC)
|
||||
STRB r0, [r6, #USBEP_SOFS_LEN]
|
||||
|
||||
LDRB r1, [r6, #USBEP_SOFS_STAT]
|
||||
MOVS r0, #1
|
||||
ORRS r1, r1, r0
|
||||
STRB r1, [r6, #USBEP_SOFS_STAT] // set "data available" flag for EP0OUT Buffer
|
||||
B send_ACK
|
||||
|
||||
pid_data_setup: LDR r6, ASM_USB_EP_BUFFERS // copy setup data to buffer
|
||||
MOV r0, r8
|
||||
MOV r1, r9
|
||||
MOV r2, r10
|
||||
MOV r5, r6 // generate address to EP0buffer data
|
||||
ADDS r5, r5, #USBEP_OFS_SETUP
|
||||
STM r5!, {r0, r1, r2} // copy data to SETUP buffer
|
||||
LDRB r1, [r6, #(USBEP_OFS_SETUP + USBEP_SOFS_STAT)]
|
||||
MOVS r0, #1
|
||||
ORRS r1, r1, r0
|
||||
STRB r1, [r6, #(USBEP_OFS_SETUP + USBEP_SOFS_STAT)] // set "data available" flag for SETUP BUFFER
|
||||
|
||||
// SEND ACK... This is the only option. NAK is not allowed in a setup phase
|
||||
B send_ACK
|
||||
|
||||
|
||||
pid_in: MOVS r0, #2
|
||||
STRB r0, [r7] // Flag, that an IN PID was received
|
||||
|
||||
// extract address
|
||||
MOV r0, r8
|
||||
LSRS r1, r0, #16
|
||||
MOVS r2, #0xfe
|
||||
ANDS r1, r1, r2 // Mask out address bits a0-a6. Order: a0 a1 a2 a3 a4 a5 a6 0
|
||||
STRB r1, [r7, #1] // Store address in protocol state
|
||||
|
||||
// check if USB Address is for this device
|
||||
CMP r1, r3
|
||||
BNE jump_exit // This device is not addressed => Don't react on DATA PID
|
||||
|
||||
// extract endpoint number
|
||||
LSRS r1, r0, #9
|
||||
MOVS r2, #0xf0
|
||||
ANDS r1, r1, r2
|
||||
STRB r1, [r7, #2] // Store endpoint in protocol state => TODO: APPLY MASK! Bitorder e0 e1 e2 e3 0 0 0 0
|
||||
|
||||
// build pointer to correct endpoint buffer
|
||||
LDR r5, ASM_USB_EP_BUFFERS
|
||||
CMP r1, #0
|
||||
BEQ pid_in_ep0_addressed
|
||||
ADDS r5, r5, #USBEP_OFS_EP1IN
|
||||
B pid_in_ep1_addressed
|
||||
pid_in_ep0_addressed: ADDS r5, r5, #USBEP_OFS_EP0IN
|
||||
pid_in_ep1_addressed:
|
||||
|
||||
// check stall condition
|
||||
LDRB r0, [r5, #USBEP_SOFS_STAT] // Bit0 = 0 = no data available => send NAK, Bit 0 = 1 = data availabe => send data
|
||||
MOVS r2, #2
|
||||
TST r0, r2
|
||||
BNE send_STALL // Check and handle Endpoint STALL condition
|
||||
|
||||
// check if data is available in addressed endpoint
|
||||
MOVS r1, #1
|
||||
TST r0, r1
|
||||
BEQ send_NAK
|
||||
// send Data. Important: First byte contains correct DATA PID (DATA0/DATA1)
|
||||
|
||||
PUSH {r5}
|
||||
LDM r5!, {r0, r1, r2}
|
||||
LDRB r5, [r5, #1] // => USBEP_SOFS_LEN
|
||||
LSLS r5, r5, #3 //Count of bits to transmit
|
||||
BL usb_transmit
|
||||
POP {r5}
|
||||
|
||||
LDRB r1, [r5, #USBEP_SOFS_STAT]
|
||||
MOVS r0, #0xfe
|
||||
ANDS r1, r1, r0
|
||||
STRB r1, [r5, #USBEP_SOFS_STAT] // Flag EP0IN as empty
|
||||
B jump_exit
|
||||
|
||||
|
||||
pid_out: MOVS r0, #1
|
||||
STRB r0, [r7] // Flag, that the next data package is for an endpoint
|
||||
MOV r0, r8
|
||||
// extract address
|
||||
LSRS r1, r0, #16
|
||||
MOVS r2, #0xfe
|
||||
ANDS r1, r1, r2 // Mask out address bits a0-a6. Order: a0 a1 a2 a3 a4 a5 a6 0
|
||||
STRB r1, [r7, #1] // Store address in protocol state
|
||||
|
||||
// extract endpoint number
|
||||
LSRS r1, r0, #9
|
||||
MOVS r2, #0xf0
|
||||
ANDS r1, r1, r2
|
||||
STRB r1, [r7, #2] // Store endpoint in protocol state => TODO: APPLY MASK! Bitorder e0 e1 e2 e3 0 0 0 0
|
||||
B jump_exit
|
||||
|
||||
|
||||
|
||||
// Status return functions (function => host)
|
||||
send_STALL: MOVS r0, #USB_TOKEN_STALL
|
||||
MOVS r5, #8 //Count of bits to transmit
|
||||
BL usb_transmit
|
||||
B jump_exit
|
||||
|
||||
send_NAK: MOVS r0, #USB_TOKEN_NAK
|
||||
MOVS r5, #8 //Count of bits to transmit
|
||||
BL usb_transmit
|
||||
B jump_exit
|
||||
|
||||
send_ACK: MOVS r0, #USB_TOKEN_ACK
|
||||
MOVS r5, #8 //Count of bits to transmit
|
||||
BL usb_transmit
|
||||
B jump_exit
|
||||
|
||||
|
||||
|
||||
#if defined ( __IAR_SYSTEMS_ASM__ )
|
||||
|
||||
DATA
|
||||
ALIGNROM 2
|
||||
ASM_USB_PROT_STATE: DC32 USB_PROT_STATE
|
||||
ASM_USB_EP_BUFFERS: DC32 usb_ep_buffers
|
||||
ASM_USB_DEV_ADDRESS: DC32 usb_dev_address
|
||||
LBL_PROT_HANDLED: DC32 protocol_handled
|
||||
|
||||
END
|
||||
#else
|
||||
|
||||
.BALIGN 4
|
||||
ASM_USB_PROT_STATE: .long USB_PROT_STATE
|
||||
ASM_USB_EP_BUFFERS: .long usb_ep_buffers
|
||||
ASM_USB_DEV_ADDRESS: .long usb_dev_address
|
||||
LBL_PROT_HANDLED: .long protocol_handled
|
||||
.END
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
@@ -0,0 +1,257 @@
|
||||
/****************************************************************************
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#include "usb_stack.h"
|
||||
#include "usb.h"
|
||||
#include "usb_descriptors.h"
|
||||
#include "usb_helperfunctions.h"
|
||||
|
||||
#ifdef USB_ENABLE_HID
|
||||
#include "usb_hid.h"
|
||||
#endif
|
||||
|
||||
|
||||
/* Standard Request codes for Control */
|
||||
#define SRQ_GET_STATUS (0x00) /* Standard Request : Get Status */
|
||||
#define SRQ_CLEAR_FEATURE (0x01) /* Standard Request : Clear Feature */
|
||||
#define SRQ_RESERVED1 (0x02) /* Standard Request : Reserved for future use */
|
||||
#define SRQ_SET_FEATURE (0x03) /* Standard Request : Set Feature */
|
||||
#define SRQ_RESERVED2 (0x04) /* Standard Request : Reserved for future use */
|
||||
#define SRQ_SET_ADDRESS (0x05) /* Standard Request : Set Address */
|
||||
#define SRQ_GET_DESCRIPTOR (0x06) /* Standard Request : Get Descriptor */
|
||||
#define SRQ_SET_DESCRIPTOR (0x07) /* Standard Request : Set Descriptor */
|
||||
#define SRQ_GET_CONFIGURATION (0x08) /* Standard Request : Get Configuration */
|
||||
#define SRQ_SET_CONFIGURATION (0x09) /* Standard Request : Set Configuration */
|
||||
#define SRQ_GET_INTERFACE (0x0a) /* Standard Request : Get Interface */
|
||||
#define SRQ_SET_INTERFACE (0x0b) /* Standard Request : Set Interface */
|
||||
#define SRQ_SYNCH_FRAME (0x0c) /* Standard Request : Synch Frame */
|
||||
|
||||
/* Status type codes used in SRQ_GET_STATUS request */
|
||||
#define STATUS_DEVICE (0x80) /* Get Status: Device */
|
||||
#define STATUS_INTERFACE (0x81) /* Get Status: Interface */
|
||||
#define STATUS_ENDPOINT (0x82) /* Get Status: End Point */
|
||||
|
||||
/* Feature type codes used in SRQ_SET_FEATURE request */
|
||||
#define FEATURE_DEVICE (0x00) /* Feature: Device */
|
||||
#define FEATURE_ENDPOINT (0x02) /* Feature: End Point */
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
uint8_t usb_dev_address; /* default address is 0x00 TODO: Reset to zero when a reset condition is present on BUS (SE0 long duration) */
|
||||
static uint8_t usb_dev_configuration;
|
||||
static uint8_t usb_dev_alternatesetting;
|
||||
static uint8_t usb_dev_Rwuen;
|
||||
static uint8_t usb_dev_selfpwr;
|
||||
|
||||
|
||||
|
||||
|
||||
void usbstack_init(void)
|
||||
{
|
||||
usb_dev_address = 0x00;
|
||||
usb_dev_configuration = 0;
|
||||
usb_dev_alternatesetting = 0;
|
||||
usb_dev_Rwuen = 0;
|
||||
usb_dev_selfpwr = 0;
|
||||
}
|
||||
|
||||
|
||||
bool usbstack_got_setup_cmd(const setupData_t *psetupdata)
|
||||
{
|
||||
uint8_t response[8];
|
||||
uint16_t clen;
|
||||
bool handled;
|
||||
|
||||
handled = true;
|
||||
|
||||
switch(psetupdata->bRequest)
|
||||
{
|
||||
case SRQ_SET_ADDRESS: /* This needs to be done within 50ms after receiving the setup packet! */
|
||||
usb_control_acknowledge();
|
||||
while (!usb_ep_in_buf_empty(0)); /* Wait until the complete setup transfer is finished, before setting the usb device address */
|
||||
usb_dev_address = bitreverse(psetupdata->wValue);
|
||||
/* set Address does not have an OUT stage */
|
||||
break;
|
||||
case SRQ_GET_DESCRIPTOR: // *** Get Descriptor
|
||||
switch (psetupdata->wValue >> 8)
|
||||
{
|
||||
case DESCRIPTOR_DEVICE: // Device
|
||||
clen = psetupdata->wLength;
|
||||
if (clen > sizeof(device_descriptor)) clen = sizeof(device_descriptor);
|
||||
usb_control_dataIn(device_descriptor, clen);
|
||||
break;
|
||||
case DESCRIPTOR_CONFIGURATION: // Configuration setupdat[2] contains configuration number
|
||||
clen = psetupdata->wLength;
|
||||
if (clen > sizeof(config_0_descriptor))
|
||||
{
|
||||
clen = sizeof(config_0_descriptor);
|
||||
}
|
||||
usb_control_dataIn(config_0_descriptor, clen); /* setupdat[2] specifies configurationnumber, currently fixed to 0 */
|
||||
|
||||
if (clen == 0x09)
|
||||
{
|
||||
volatile int i;
|
||||
i++;
|
||||
}
|
||||
|
||||
break;
|
||||
case DESCRIPTOR_STRING: // String setupdat[2] contains string index
|
||||
switch (psetupdata->wValue & 0xff)
|
||||
{
|
||||
case 0:
|
||||
clen = psetupdata->wLength;
|
||||
if (clen > sizeof(string_0_descriptor)) clen = sizeof(string_0_descriptor);
|
||||
usb_control_dataIn(string_0_descriptor, clen);
|
||||
break;
|
||||
case 1:
|
||||
clen = psetupdata->wLength;
|
||||
if (clen > sizeof(string_1_descriptor)) clen = sizeof(string_1_descriptor);
|
||||
usb_control_dataIn(string_1_descriptor, clen);
|
||||
break;
|
||||
case 2:
|
||||
clen = psetupdata->wLength;
|
||||
if (clen > sizeof(string_2_descriptor)) clen = sizeof(string_2_descriptor);
|
||||
usb_control_dataIn(string_2_descriptor, clen);
|
||||
break;
|
||||
default:
|
||||
usb_control_dataIn(response, 0);
|
||||
break;
|
||||
/* INFO: more/less string descriptors can be used. String descriptors are not mandatory! */
|
||||
}
|
||||
break;
|
||||
#ifdef USB_ENABLE_HID
|
||||
case DESCRIPTOR_REPORT:
|
||||
clen = psetupdata->wLength;
|
||||
if (clen > sizeof(hid_report_descriptor)) clen = sizeof(hid_report_descriptor);
|
||||
usb_control_dataIn(hid_report_descriptor, clen);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
usb_ep_stall(USB_EP0OUT);
|
||||
usb_ep_stall(USB_EP0IN);
|
||||
handled = false;
|
||||
}
|
||||
break;
|
||||
case SRQ_GET_INTERFACE:
|
||||
response[0] = usb_dev_alternatesetting;
|
||||
usb_control_dataIn(response, 1);
|
||||
break;
|
||||
case SRQ_SET_INTERFACE:
|
||||
usb_dev_alternatesetting = psetupdata->wValue;
|
||||
usb_control_acknowledge();
|
||||
break;
|
||||
case SRQ_SET_CONFIGURATION:
|
||||
usb_dev_configuration = psetupdata->wValue;
|
||||
usb_control_acknowledge();
|
||||
break;
|
||||
case SRQ_GET_CONFIGURATION:
|
||||
response[0] = usb_dev_configuration;
|
||||
usb_control_dataIn(response, 1);
|
||||
break;
|
||||
case SRQ_GET_STATUS:
|
||||
switch(psetupdata->bmRequestType)
|
||||
{
|
||||
case STATUS_DEVICE:
|
||||
response[0] = (usb_dev_Rwuen << 1) | usb_dev_selfpwr;
|
||||
response[1] = 0;
|
||||
usb_control_dataIn(response, 2);
|
||||
break;
|
||||
case STATUS_INTERFACE:
|
||||
response[0] = 0;
|
||||
response[1] = 0;
|
||||
usb_control_dataIn(response, 2);
|
||||
break;
|
||||
case STATUS_ENDPOINT:
|
||||
response[0] = 0; /* TODO: return if endpoint is stalled */
|
||||
response[1] = 0;
|
||||
usb_control_dataIn(response, 2);
|
||||
break;
|
||||
default:
|
||||
usb_ep_stall(USB_EP0OUT);
|
||||
usb_ep_stall(USB_EP0IN);
|
||||
handled = false;
|
||||
}
|
||||
break;
|
||||
case SRQ_CLEAR_FEATURE:
|
||||
switch(psetupdata->bmRequestType)
|
||||
{
|
||||
case FEATURE_DEVICE:
|
||||
if(psetupdata->wValue == 1)
|
||||
usb_dev_Rwuen = 0; /* Disable Remote Wakeup */
|
||||
else
|
||||
{
|
||||
usb_ep_stall(USB_EP0OUT);
|
||||
usb_ep_stall(USB_EP0IN);
|
||||
}
|
||||
usb_control_acknowledge();
|
||||
break;
|
||||
case FEATURE_ENDPOINT:
|
||||
if ( (psetupdata->wValue & 0x0f) == 0 )
|
||||
{
|
||||
usb_ep_unstall(USB_EP0OUT);
|
||||
usb_ep_unstall(USB_EP0IN);
|
||||
}
|
||||
else
|
||||
{
|
||||
usb_ep_unstall(USB_EP1OUT);
|
||||
usb_ep_unstall(USB_EP1IN);
|
||||
}
|
||||
usb_control_acknowledge();
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case SRQ_SET_FEATURE:
|
||||
switch(psetupdata->bmRequestType)
|
||||
{
|
||||
case FEATURE_DEVICE:
|
||||
if (psetupdata->wValue == 1)
|
||||
usb_dev_Rwuen = 1; /* enable remote wakeup */
|
||||
else
|
||||
{
|
||||
usb_ep_stall(USB_EP0OUT);
|
||||
usb_ep_stall(USB_EP0IN);
|
||||
}
|
||||
break;
|
||||
case FEATURE_ENDPOINT:
|
||||
if ( (psetupdata->wValue & 0x0f) == 0 )
|
||||
{
|
||||
usb_ep_stall(USB_EP0OUT);
|
||||
usb_ep_stall(USB_EP0IN);
|
||||
}
|
||||
else
|
||||
{
|
||||
usb_ep_stall(USB_EP1OUT);
|
||||
usb_ep_stall(USB_EP1IN);
|
||||
}
|
||||
break;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
usb_ep_stall(USB_EP0OUT);
|
||||
usb_ep_stall(USB_EP0IN);
|
||||
handled = false;
|
||||
}
|
||||
|
||||
|
||||
return handled;
|
||||
}
|
||||
@@ -0,0 +1,58 @@
|
||||
/****************************************************************************
|
||||
**
|
||||
** Lemcusb - Firmware USB driver for EFM32 Microcontroller
|
||||
** Copyright (C) 2014 http://lemcu.org
|
||||
**
|
||||
** This library is free software: you can redistribute it and/or modify
|
||||
** it under the terms of the GNU General Public License version 3.0 as
|
||||
** published by the Free Software Foundation and appearing in the file
|
||||
** LICENSE.txt included in the packaging of this file.
|
||||
**
|
||||
** In addition, as a special exception, http://lemcu.org gives you certain
|
||||
** additional rights. These rights are described in the lemcu.org GPL
|
||||
** Exception version 1.0, included in the file GPL_EXCEPTION.txt in this
|
||||
** package.
|
||||
**
|
||||
** This library is distributed in the hope that it will be useful,
|
||||
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __USB_STACK_H__
|
||||
#define __USB_STACK_H__
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include "usb.h"
|
||||
|
||||
|
||||
/* These defines can be used to mask out the bmRequestType bits */
|
||||
#define USB_SETUP_BM_DIRECTION (0x80)
|
||||
#define USB_SETUP_BM_TYPE (0x60)
|
||||
#define USB_SETUP_BM_RECIPIENT (0x1f)
|
||||
|
||||
#define USB_SETUP_DIR_DEV_TO_HOST (0x80)
|
||||
|
||||
#define USB_SETUP_TYPE_STANDARD (0 << 5)
|
||||
#define USB_SETUP_TYPE_CLASS (1 << 5)
|
||||
#define USB_SETUP_TYPE_VENDOR (2 << 5)
|
||||
|
||||
#define USB_SETUP_DEVICE (0x00)
|
||||
#define USB_SETUP_INTERFACE (0x01)
|
||||
#define USB_SETUP_ENDPOINT (0x02)
|
||||
#define USB_SETUP_OTHER (0x03)
|
||||
|
||||
void usbstack_init(void);
|
||||
|
||||
|
||||
/* call this function when setup data was received
|
||||
TODO: allow user to call this also, when no setup data was received.
|
||||
I think the best way is to let the user only call functions from this file and not from usb.h */
|
||||
bool usbstack_got_setup_cmd(const setupData_t *psetupdata);
|
||||
|
||||
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
Reference in New Issue
Block a user