添加一些关于midi播放的项目
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terryLP
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/**************************************************************************!
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* 技术讨论：QQ群 123763203
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* 官网 ：www.navota.com
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*
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* @file spi.c
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* @brief 串行外设接口模块(SPI)函数库
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* @author Navota
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* @date 2017-1-1
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****************************************************************************/
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#include "common.h"
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#include "spi.h"
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/****************************************************************************!
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* @ 存放SPI回调函数接口
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****************************************************************************/
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SPI_CallbackType SPI_Callback[MAX_SPI_NO] = {(SPI_CallbackType)NULL};
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/*****************************************************************************//*!
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*
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* @brief 初始化SPI模块
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*
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* @param[in] pSPI 指向SPI模块.
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* @param[in] pConfig 指向SPI配置参数.
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*
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* @return none.
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*
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*****************************************************************************/
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void SPI_Init(SPI_Type *pSPI, SPI_ConfigType *pConfig)
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{
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#if defined(CPU_NV32M3)
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/* sanity check */
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ASSERT((pSPI == SPI0));
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SIM->SCGC |= SIM_SCGC_SPI0_MASK;
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#else
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/* sanity check */
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ASSERT((pSPI == SPI0) || (pSPI == SPI1));
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/*使能SPI模块总线时钟*/
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if( pSPI == SPI0)
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{
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SIM->SCGC |= SIM_SCGC_SPI0_MASK;
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}
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else
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{
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SIM->SCGC |= SIM_SCGC_SPI1_MASK;
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}
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#endif
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/*配置SPI控制寄存器 */
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if( pConfig->sSettings.bIntEn) //使能SPI中断
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{
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SPI_IntEnable(pSPI);
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#if defined(CPU_NV32M3)
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NVIC_EnableIRQ(SPI0_IRQn);
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#else
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if( pSPI == SPI0 )
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{
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NVIC_EnableIRQ(SPI0_IRQn);
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}
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else
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{
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NVIC_EnableIRQ(SPI1_IRQn);
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}
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#endif
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}
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if( pConfig->sSettings.bTxIntEn) //使能SPI发送中断
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{
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SPI_TxIntEnable(pSPI);
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#if defined(CPU_NV32M3)
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NVIC_EnableIRQ(SPI0_IRQn);
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#else
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if( pSPI == SPI0 )
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{
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NVIC_EnableIRQ(SPI0_IRQn);
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}
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else
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{
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NVIC_EnableIRQ(SPI1_IRQn);
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}
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#endif
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}
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if( pConfig->sSettings.bMasterMode) //主/从机选择
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{
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SPI_SetMasterMode(pSPI); //SPI设置为主机模式
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}
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else
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{
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SPI_SetSlaveMode(pSPI); //SPI设置为从机模式
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}
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if( pConfig->sSettings.bClkPolarityLow) //时钟极性配置
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{
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SPI_SetClockPol(pSPI,1);
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}
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if( pConfig->sSettings.bClkPhase1) //时钟相位配置
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{
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SPI_SetClockPhase(pSPI,1);
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}
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if( pConfig->sSettings.bShiftLSBFirst) //设置SPI串行数据传输开始位
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{
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SPI_SetLSBFirst(pSPI); // SPI串行数据传输从最低位开始(LSB)
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}
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if( pConfig->sSettings.bMatchIntEn)
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{
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SPI_MatchIntEnable(pSPI); //使能SPI匹配中断
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}
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if( pConfig->sSettings.bModeFaultEn)
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{
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SPI_ModfEnable(pSPI); //使能主机模式模式错误功能.
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}
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if( pConfig->sSettings.bMasterAutoDriveSS)
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{
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/*设置SSOE和MODFEN位，从机模式中SS引脚为从机输出，自动驱动从机SS引脚使能*/
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SPI_SSOutputEnable(pSPI);
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SPI_ModfEnable(pSPI);
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}
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if( pConfig->sSettings.bPinAsOuput)
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{
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SPI_BidirPinEnable(pSPI); //使能双向引脚配置.
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}
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if( pConfig->sSettings.bBidirectionModeEn)
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{
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SPI_BidirOutEnable(pSPI); //使能双向模式输出.
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}
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if( pConfig->sSettings.bStopInWaitMode)
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{
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SPI_ClockStopEnable(pSPI); //SPI时钟在等待模式下关闭
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}
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if(pConfig->sSettings.bMasterMode) //设置波特率
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{
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SPI_SetBaudRate(pSPI,pConfig->u32BusClkHz,pConfig->u32BitRate);
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}
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/*使能SPI模块*/
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if( pConfig->sSettings.bModuleEn)
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{
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SPI_Enable(pSPI);
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}
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}
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/*****************************************************************************//*!
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*
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* @brief 设置SPI波特率.
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*
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* @param[in] pSPI 指向SPI模块
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* @param[in] u32BusClock 总线时钟.
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* @param[in] u32Bps SPI波特率.
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*
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* @return none.
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*
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*****************************************************************************/
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void SPI_SetBaudRate(SPI_Type *pSPI,uint32_t u32BusClock,uint32_t u32Bps)
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{
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uint32_t u32BitRateDivisor;
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uint8_t u8Sppr;
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uint8_t u8Spr;
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uint8_t u8ReadFlag;
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u32BitRateDivisor = u32BusClock/u32Bps; /* 计算波特率因子 */
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u8ReadFlag = 0;
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/* 计算最适合的 SPPR 和 SPR */
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for (u8Spr = 0; u8Spr <= 8; u8Spr++)
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{
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for(u8Sppr = 0; u8Sppr <= 7; u8Sppr++)
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{
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if((u32BitRateDivisor>>(u8Spr+1))<=(u8Sppr+1))
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{
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u8ReadFlag = 1;
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break;
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}
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}
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if(u8ReadFlag)
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{
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break;
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}
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}
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if(u8Sppr >=8)
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{
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u8Sppr = 7;
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}
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if(u8Spr >8)
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{
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u8Spr = 8;
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}
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/* 设置波特率 */
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pSPI->BR = SPI_BR_SPPR(u8Sppr) | SPI_BR_SPR(u8Spr);
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}
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/*****************************************************************************//*!
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*
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* @brief 读/写数据寄存器.
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*
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* @param[in] pSPI 指向SPI模块.
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* @param[in] pWrBuff -- 发送（写）数组指针
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* @param[in] uiLength -- 读/写数据长度.
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* @param[out] pRdBuff -- 接收（读）数组指针.
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*
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* @return if <0, means error, 0: success.
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*
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*****************************************************************************/
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ResultType SPI_TransferWait(SPI_Type *pSPI, SPI_WidthType* pRdBuff, SPI_WidthType *pWrBuff,uint32 uiLength)
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{
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ResultType err = SPI_ERR_SUCCESS;
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uint32_t i;
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if(!uiLength)
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{
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return (err);
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}
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for(i = 0; i < uiLength; i++)
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{
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while(!SPI_IsSPTEF(pSPI));
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SPI_WriteDataReg(pSPI,pWrBuff[i]);
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while(!SPI_IsSPRF(pSPI));
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pRdBuff[i] = SPI_ReadDataReg(pSPI);
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}
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return (err);
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}
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/*****************************************************************************//*!
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*
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* @brief 复位SPI模块
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*
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* @param[in] pSPI 指向SPI模块
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*
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* @return none.
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*
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*****************************************************************************/
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void SPI_DeInit(SPI_Type *pSPI)
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{
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int16 i;
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pSPI->C1 = SPI_C1_DEFAULT;
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pSPI->C2 = SPI_C2_DEFAULT;
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pSPI->BR = SPI_BR_DEFAULT;
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pSPI->M = SPI_M_DEFAULT;
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for(i = 0; i<100; i++); /*延时一段时间，等待SPI退出中断 */
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}
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/*****************************************************************************//*!
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*
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* @brief 设置SPI回调函数，在中断服务函数中调用
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*
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* @param[in] pSPI 指向SPI模块
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* @param[in] pfnCallback 回调函数.
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*
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* @return none.
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*
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*****************************************************************************/
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void SPI_SetCallback(SPI_Type *pSPI,SPI_CallbackType pfnCallback)
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{
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uint32_t u32Port = ((uint32_t)pSPI-(uint32_t)SPI0)>>12;
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ASSERT(u32Port <2);
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SPI_Callback[u32Port] = pfnCallback;
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}
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/*****************************************************************************//*!
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*
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* @brief SPI0 中断服务函数.
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*
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* @param none.
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* @return none.
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*
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*****************************************************************************/
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void SPI0_Isr(void)
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{
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if( SPI_Callback[0] )
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{
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SPI_Callback[0]();
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}
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}
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#ifndef CPU_NV32M3
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/*****************************************************************************//*!
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*
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* @brief SPI1 中断服务函数
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*
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* @param none.
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* @return none.
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*
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*****************************************************************************/
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void SPI1_Isr(void)
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{
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if( SPI_Callback[1] )
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{
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SPI_Callback[1]();
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}
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}
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#endif
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