367 lines
11 KiB
C
367 lines
11 KiB
C
#include "drv_sdio_sd.h"
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#include "string.h"
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#include <rtthread.h>
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#include <dfs_fs.h>
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SD_HandleTypeDef SDCARD_Handler;
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HAL_SD_CardInfoTypedef SDCardInfo; //SD卡信息结构体
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DMA_HandleTypeDef SDTxDMAHandler,SDRxDMAHandler; //SD卡DMA发送和接收句柄
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//SD卡初始化
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//返回值:0 初始化正确；其他值，初始化错误
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rt_uint8_t SD_Init(void)
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{
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rt_uint8_t SD_Error;
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//初始化时的时钟不能大于400KHZ
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SDCARD_Handler.Instance=SDIO;
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SDCARD_Handler.Init.ClockEdge=SDIO_CLOCK_EDGE_RISING; //上升沿
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SDCARD_Handler.Init.ClockBypass=SDIO_CLOCK_BYPASS_DISABLE; //不使用bypass模式，直接用HCLK进行分频得到SDIO_CK
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SDCARD_Handler.Init.ClockPowerSave=SDIO_CLOCK_POWER_SAVE_DISABLE; //空闲时不关闭时钟电源
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SDCARD_Handler.Init.BusWide=SDIO_BUS_WIDE_1B; //1位数据线
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SDCARD_Handler.Init.HardwareFlowControl=SDIO_HARDWARE_FLOW_CONTROL_DISABLE;//关闭硬件流控
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SDCARD_Handler.Init.ClockDiv=SDIO_TRANSFER_CLK_DIV; //SD传输时钟频率最大25MHZ
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SD_Error=HAL_SD_Init(&SDCARD_Handler,&SDCardInfo);
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if(SD_Error!=SD_OK) return 1;
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SD_Error=HAL_SD_WideBusOperation_Config(&SDCARD_Handler,SDIO_BUS_WIDE_4B);//使能宽总线模式
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if(SD_Error!=SD_OK) return 2;
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return 0;
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}
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//SDMMC底层驱动，时钟使能，引脚配置，DMA配置
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//此函数会被HAL_SD_Init()调用
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//hsd:SD卡句柄
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void HAL_SD_MspInit(SD_HandleTypeDef *hsd)
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{
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DMA_HandleTypeDef TxDMAHandler,RxDMAHandler;
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GPIO_InitTypeDef GPIO_Initure;
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__HAL_RCC_SDIO_CLK_ENABLE(); //使能SDIO时钟
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__HAL_RCC_DMA2_CLK_ENABLE(); //使能DMA2时钟
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__HAL_RCC_GPIOC_CLK_ENABLE(); //使能GPIOC时钟
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__HAL_RCC_GPIOD_CLK_ENABLE(); //使能GPIOD时钟
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//PC8,9,10,11,12
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GPIO_Initure.Pin=GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
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GPIO_Initure.Mode=GPIO_MODE_AF_PP; //推挽复用
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GPIO_Initure.Pull=GPIO_PULLUP; //上拉
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GPIO_Initure.Speed=GPIO_SPEED_HIGH; //高速
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GPIO_Initure.Alternate=GPIO_AF12_SDIO; //复用为SDIO
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HAL_GPIO_Init(GPIOC,&GPIO_Initure); //初始化
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//PD2
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GPIO_Initure.Pin=GPIO_PIN_2;
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HAL_GPIO_Init(GPIOD,&GPIO_Initure); //初始化
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#if (SD_DMA_MODE==1) //使用DMA模式
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HAL_NVIC_SetPriority(SDMMC1_IRQn,2,0); //配置SDMMC1中断，抢占优先级2，子优先级0
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HAL_NVIC_EnableIRQ(SDMMC1_IRQn); //使能SDMMC1中断
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//配置发送DMA
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SDRxDMAHandler.Instance=DMA2_Stream3;
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SDRxDMAHandler.Init.Channel=DMA_CHANNEL_4;
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SDRxDMAHandler.Init.Direction=DMA_PERIPH_TO_MEMORY;
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SDRxDMAHandler.Init.PeriphInc=DMA_PINC_DISABLE;
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SDRxDMAHandler.Init.MemInc=DMA_MINC_ENABLE;
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SDRxDMAHandler.Init.PeriphDataAlignment=DMA_PDATAALIGN_WORD;
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SDRxDMAHandler.Init.MemDataAlignment=DMA_MDATAALIGN_WORD;
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SDRxDMAHandler.Init.Mode=DMA_PFCTRL;
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SDRxDMAHandler.Init.Priority=DMA_PRIORITY_VERY_HIGH;
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SDRxDMAHandler.Init.FIFOMode=DMA_FIFOMODE_ENABLE;
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SDRxDMAHandler.Init.FIFOThreshold=DMA_FIFO_THRESHOLD_FULL;
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SDRxDMAHandler.Init.MemBurst=DMA_MBURST_INC4;
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SDRxDMAHandler.Init.PeriphBurst=DMA_PBURST_INC4;
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__HAL_LINKDMA(hsd, hdmarx, SDRxDMAHandler); //将接收DMA和SD卡的发送DMA连接起来
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HAL_DMA_DeInit(&SDRxDMAHandler);
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HAL_DMA_Init(&SDRxDMAHandler); //初始化接收DMA
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//配置接收DMA
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SDTxDMAHandler.Instance=DMA2_Stream6;
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SDTxDMAHandler.Init.Channel=DMA_CHANNEL_4;
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SDTxDMAHandler.Init.Direction=DMA_MEMORY_TO_PERIPH;
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SDTxDMAHandler.Init.PeriphInc=DMA_PINC_DISABLE;
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SDTxDMAHandler.Init.MemInc=DMA_MINC_ENABLE;
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SDTxDMAHandler.Init.PeriphDataAlignment=DMA_PDATAALIGN_WORD;
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SDTxDMAHandler.Init.MemDataAlignment=DMA_MDATAALIGN_WORD;
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SDTxDMAHandler.Init.Mode=DMA_PFCTRL;
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SDTxDMAHandler.Init.Priority=DMA_PRIORITY_VERY_HIGH;
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SDTxDMAHandler.Init.FIFOMode=DMA_FIFOMODE_ENABLE;
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SDTxDMAHandler.Init.FIFOThreshold=DMA_FIFO_THRESHOLD_FULL;
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SDTxDMAHandler.Init.MemBurst=DMA_MBURST_INC4;
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SDTxDMAHandler.Init.PeriphBurst=DMA_PBURST_INC4;
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__HAL_LINKDMA(hsd, hdmatx, SDTxDMAHandler);//将发送DMA和SD卡的发送DMA连接起来
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HAL_DMA_DeInit(&SDTxDMAHandler);
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HAL_DMA_Init(&SDTxDMAHandler); //初始化发送DMA
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HAL_NVIC_SetPriority(DMA2_Stream3_IRQn, 3, 0); //接收DMA中断优先级
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HAL_NVIC_EnableIRQ(DMA2_Stream3_IRQn);
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HAL_NVIC_SetPriority(DMA2_Stream6_IRQn, 3, 0); //发送DMA中断优先级
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HAL_NVIC_EnableIRQ(DMA2_Stream6_IRQn);
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#endif
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}
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//得到卡信息
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//cardinfo:卡信息存储区
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//返回值:错误状态
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rt_uint8_t SD_GetCardInfo(HAL_SD_CardInfoTypedef *cardinfo)
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{
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rt_uint8_t sta;
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sta=HAL_SD_Get_CardInfo(&SDCARD_Handler,cardinfo);
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return sta;
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}
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#if (SD_DMA_MODE==1) //DMA模式
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//通过DMA读取SD卡一个扇区
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//buf:读数据缓存区
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//sector:扇区地址
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//blocksize:扇区大小(一般都是512字节)
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//cnt:扇区个数
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//返回值:错误状态;0,正常;其他,错误代码;
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rt_uint8_t SD_ReadBlocks_DMA(uint32_t *buf,uint64_t sector ,uint32_t cnt)
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{
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rt_uint8_t err=SD_OK;
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err=HAL_SD_ReadBlocks_DMA(&SDCARD_Handler,buf,sector,SECTOR_SIZE,cnt);//通过DMA读取SD卡一个扇区
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if(err==SD_OK)//读取成功
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{
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//等待读取完成
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err=HAL_SD_CheckReadOperation(&SDCARD_Handler,(uint32_t)SD_TIMEOUT);
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}
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return err;
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}
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//写SD卡
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//buf:写数据缓存区
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//sector:扇区地址
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//blocksize:扇区大小(一般都是512字节)
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//cnt:扇区个数
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//返回值:错误状态;0,正常;其他,错误代码;
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rt_uint8_t SD_WriteBlocks_DMA(uint32_t *buf,uint64_t sector,uint32_t cnt)
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{
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rt_uint8_t err=SD_OK;
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err=HAL_SD_WriteBlocks_DMA(&SDCARD_Handler,buf,sector,SECTOR_SIZE,cnt);//通过DMA写SD卡一个扇区
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if(err==SD_OK)//写成功
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{
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err=HAL_SD_CheckWriteOperation(&SDCARD_Handler,(uint32_t)SD_TIMEOUT);//等待读取完成/
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}
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return err;
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}
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//SDMMC1中断服务函数
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void SDMMC1_IRQHandler(void)
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{
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HAL_SD_IRQHandler(&SDCARD_Handler);
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}
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//DMA2数据流6中断服务函数
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void DMA2_Stream6_IRQHandler(void)
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{
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HAL_DMA_IRQHandler(SDCARD_Handler.hdmatx);
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}
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//DMA2数据流3中断服务函数
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void DMA2_Stream3_IRQHandler(void)
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{
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HAL_DMA_IRQHandler(SDCARD_Handler.hdmarx);
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}
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#else //轮训模式
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//读取SD卡扇区
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//buf:读数据缓存区
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//sector:扇区地址
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//cnt:扇区个数
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//返回值:错误状态;0,正常;其他,错误代码;
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rt_uint8_t SD_ReadBlocks(uint32_t *buf,uint64_t sector ,uint32_t cnt)
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{
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rt_uint8_t err=SD_OK;
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err=HAL_SD_ReadBlocks(&SDCARD_Handler,buf,sector,SECTOR_SIZE,cnt);//通过DMA读取SD卡一个扇区
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return err;
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}
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//写SD扇区
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//buf:写数据缓存区
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//sector:扇区地址
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//cnt:扇区个数
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//返回值:错误状态;0,正常;其他,错误代码;
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rt_uint8_t SD_WriteBlocks(uint32_t *buf,uint64_t sector,uint32_t cnt)
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{
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return HAL_SD_WriteBlocks(&SDCARD_Handler,buf,sector,SECTOR_SIZE,cnt);
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}
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#endif
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/*
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* RT-Thread SD Card Driver
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* 20100715 Bernard support SDHC card great than 4G.
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* 20110905 JoyChen support to STM32F2xx
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*/
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static struct rt_device sdcard_device;
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static struct rt_semaphore sd_lock;
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/* RT-Thread Device Driver Interface */
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static rt_err_t rt_sdcard_init(rt_device_t dev)
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{
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if (rt_sem_init(&sd_lock, "sdlock", 1, RT_IPC_FLAG_FIFO) != RT_EOK)
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{
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rt_kprintf("init sd lock semaphore failed\n");
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}
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else
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rt_kprintf("SD Card init OK\n");
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return RT_EOK;
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}
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static rt_err_t rt_sdcard_open(rt_device_t dev, rt_uint16_t oflag)
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{
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return RT_EOK;
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}
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static rt_err_t rt_sdcard_close(rt_device_t dev)
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{
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return RT_EOK;
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}
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static uint32_t sdio_buffer[512/sizeof(uint32_t)];
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static rt_size_t rt_sdcard_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
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{
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rt_uint8_t status = SD_OK;
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rt_sem_take(&sd_lock, RT_WAITING_FOREVER);
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if(((uint32_t)buffer & 0x03) != 0)
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{
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/* non-aligned. */
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uint32_t i;
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rt_size_t sector_adr;
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uint8_t* copy_buffer;
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sector_adr = pos*SECTOR_SIZE;
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copy_buffer = (uint8_t*)buffer;
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for(i=0; i<size; i++)
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{
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#if (SD_DMA_MODE==1)
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status=SD_ReadBlocks_DMA(sdio_buffer,sector_adr,1);//通过DMA写SD卡一个扇区
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#else
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status=SD_ReadBlocks(sdio_buffer,sector_adr,1);
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#endif
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memcpy(copy_buffer, sdio_buffer, SECTOR_SIZE);
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sector_adr += SECTOR_SIZE;
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copy_buffer += SECTOR_SIZE;
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}
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}
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else
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{
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#if (SD_DMA_MODE==1)
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status=SD_ReadBlocks_DMA(buffer,pos*SECTOR_SIZE,size);//通过DMA写SD卡一个扇区
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#else
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SD_ReadBlocks(buffer,pos*SECTOR_SIZE,size);
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#endif
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}
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rt_sem_release(&sd_lock);
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if (status == SD_OK) return size;
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rt_kprintf("read failed: %d, buffer 0x%08x\n", status, buffer);
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return 0;
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}
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static rt_size_t rt_sdcard_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
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{
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rt_uint8_t status = SD_OK;
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rt_sem_take(&sd_lock, RT_WAITING_FOREVER);
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if(((uint32_t)buffer & 0x03) != 0)
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{
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/* non-aligned. */
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uint32_t i;
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rt_size_t sector_adr;
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uint8_t* copy_buffer;
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sector_adr = pos*SECTOR_SIZE;
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copy_buffer = (uint8_t*)buffer;
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for(i=0; i<size; i++)
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{
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memcpy(sdio_buffer, copy_buffer, SECTOR_SIZE);
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#if (SD_DMA_MODE==1)
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status=SD_WriteBlocks_DMA((uint32_t*)sdio_buffer,sector_adr,1);
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#else
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status=SD_WriteBlocks((uint32_t*)sdio_buffer,sector_adr,1);
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#endif
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sector_adr += SECTOR_SIZE;
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copy_buffer += SECTOR_SIZE;
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}
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}
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else
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{
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#if (SD_DMA_MODE==1)
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status=SD_WriteBlocks_DMA((uint32_t*)buffer,pos*SECTOR_SIZE,size);
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#else
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status=SD_WriteBlocks((uint32_t*)buffer,pos*SECTOR_SIZE,size);
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#endif
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}
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// }
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rt_sem_release(&sd_lock);
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if (status == SD_OK) return size;
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rt_kprintf("write failed: %d, buffer 0x%08x\n", status, buffer);
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return 0;
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}
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static rt_err_t rt_sdcard_control(rt_device_t dev, rt_uint8_t cmd, void *args)
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{
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RT_ASSERT(dev != RT_NULL);
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if (cmd == RT_DEVICE_CTRL_BLK_GETGEOME)
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{
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struct rt_device_blk_geometry *geometry;
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geometry = (struct rt_device_blk_geometry *)args;
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if (geometry == RT_NULL) return -RT_ERROR;
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geometry->bytes_per_sector = 512;
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geometry->block_size = SDCardInfo.CardBlockSize;
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geometry->sector_count = SDCardInfo.CardCapacity/SDCardInfo.CardBlockSize;
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}
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return RT_EOK;
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}
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static int rt_hw_sdcard_init(void)
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{
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if (SD_Init() == SD_OK)
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{
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/* register sdcard device */
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sdcard_device.type = RT_Device_Class_Block;
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sdcard_device.init = rt_sdcard_init;
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sdcard_device.open = rt_sdcard_open;
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sdcard_device.close = rt_sdcard_close;
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sdcard_device.read = rt_sdcard_read;
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sdcard_device.write = rt_sdcard_write;
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sdcard_device.control = rt_sdcard_control;
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/* no private */
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sdcard_device.user_data = &SDCardInfo;
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rt_device_register(&sdcard_device, "sd0",
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RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
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return RT_EOK;
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}
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rt_kprintf("sdcard init failed\n");
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return RT_ERROR;
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}
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INIT_BOARD_EXPORT(rt_hw_sdcard_init);
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