添加一些关于midi播放的项目

2025-03-24 14:30:56 +08:00
parent e31eb22077
commit 498b4ef13b
699 changed files with 186162 additions and 1 deletions
@@ -0,0 +1,77 @@
+/******************************************************************************
+*
+* @brief Implement generic NV32 startup code. 
+*
+*******************************************************************************/
+
+#include "common.h"
+
+#pragma section = ".data"
+#pragma section = ".data_init"
+#pragma section = ".bss"
+#pragma section = "CodeRelocate"
+#pragma section = "CodeRelocateRam" 
+
+/********************************************************************/
+void
+common_startup(void)
+{
+//    extern char __DATA_ROM[];
+//    extern char __DATA_RAM[];
+//    extern char __DATA_END[];
+  
+    /* Declare a counter we'll use in all of the copy loops */
+    uint32 n;
+ 
+ 
+    /* Addresses for VECTOR_TABLE and VECTOR_RAM come from the linker file */  
+    extern uint32 __VECTOR_TABLE[];
+    extern uint32 __VECTOR_RAM[];
+
+    /* Copy the vector table to RAM */
+    if (__VECTOR_RAM != __VECTOR_TABLE)
+    {
+        for (n = 0; n < 48 ; n++)     //  for small memory space, excluding flash configuration field
+          
+            __VECTOR_RAM[n] = __VECTOR_TABLE[n];
+    }
+    /* Point the VTOR to the new copy of the vector table */
+    write_vtor((uint32)__VECTOR_RAM);    
+
+    /* Get the addresses for the .data section (initialized data section) */
+    uint8* data_ram = __section_begin(".data");
+    uint8* data_rom = __section_begin(".data_init");
+    uint8* data_rom_end = __section_end(".data_init");
+    
+    /* Copy initialized data from ROM to RAM */
+    n = data_rom_end - data_rom;
+    while (n--)
+      *data_ram++ = *data_rom++;
+ 
+ 
+    /* Get the addresses for the .bss section (zero-initialized data) */
+    uint8* bss_start = __section_begin(".bss");
+    uint8* bss_end = __section_end(".bss");
+    
+    /* Clear the zero-initialized data section */
+    n = bss_end - bss_start;
+    while(n--)
+      *bss_start++ = 0;    
+    
+    /* Get addresses for any code sections that need to be copied from ROM to RAM.
+     * The IAR tools have a predefined keyword that can be used to mark individual
+     * functions for execution from RAM. Add "__ramfunc" before the return type in
+     * the function prototype for any routines you need to execute from RAM instead 
+     * of ROM. ex: __ramfunc void foo(void);
+     */
+    uint8* code_relocate_ram = __section_begin("CodeRelocateRam");
+    uint8* code_relocate = __section_begin("CodeRelocate");
+    uint8* code_relocate_end = __section_end("CodeRelocate");
+    
+    /* Copy functions from ROM to RAM */
+    n = code_relocate_end - code_relocate;
+    while (n--)
+      *code_relocate_ram++ = *code_relocate++;
+
+}
+/********************************************************************/