u8 SD_Init(void)
{
u8 SD_Error;
//³õʼ»¯Ê±µÄʱÖÓ²»ÄÜ´óÓÚ400KHZ
SDCARD_Handler.Instance = SDMMC1;
SDCARD_Handler.Init.ClockEdge = SDMMC_CLOCK_EDGE_RISING; //ÉÏÉýÑØ
SDCARD_Handler.Init.ClockBypass = SDMMC_CLOCK_BYPASS_DISABLE; //²»Ê¹ÓÃbypassģʽ£¬Ö±½ÓÓÃHCLK½øÐзÖƵµÃµ½SDIO_CK
SDCARD_Handler.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_DISABLE; //¿ÕÏÐʱ²»¹Ø±ÕʱÖÓµçÔ´
SDCARD_Handler.Init.BusWide = SDMMC_BUS_WIDE_1B; //1λÊý¾ÝÏß
SDCARD_Handler.Init.HardwareFlowControl = SDMMC_HARDWARE_FLOW_CONTROL_DISABLE;//¹Ø±ÕÓ²¼þÁ÷¿Ø
SDCARD_Handler.Init.ClockDiv = 4;//SD´«ÊäʱÖÓƵÂÊ×î´ó25MHZ SDMMC_INIT_CLK_DIV SDMMC_TRANSFER_CLK_DIV
SD_Error = HAL_SD_Init(&SDCARD_Handler);
//printf("
HAL_SD_Init:%d",SD_Error);
if(SD_Error != HAL_OK) return 1;
SD_Error = HAL_SD_ConfigWideBusOperation(&SDCARD_Handler,SDMMC_BUS_WIDE_4B);//ʹÄÜ¿í×ÜÏßģʽ
//printf("
HAL_SD_ConfigWideBusOperation:%d",SD_Error);
if(SD_Error != HAL_OK) return 2;
SD_Error = SD_GetCardInfo(&SDCardInfo);
//printf("
SD_GetCardInfo:%d",SD_Error);
if(SD_Error != HAL_OK) return 3;
return 0;
}
//SDMMCµ×²ãÇý¶¯£¬Ê±ÖÓʹÄÜ£¬Òý½ÅÅäÖã¬DMAÅäÖÃ
//´Ëº¯Êý»á±»HAL_SD_Init()µ÷ÓÃ
//hsd:SD¿¨¾ä±ú
void HAL_SD_MspInit(SD_HandleTypeDef *hsd)
{
GPIO_InitTypeDef GPIO_Initure;
__HAL_RCC_SDMMC1_CLK_ENABLE();//ʹÄÜSDMMCʱÖÓ
__HAL_RCC_DMA2_CLK_ENABLE(); //ʹÄÜDMA2ʱÖÓ
__HAL_RCC_GPIOC_CLK_ENABLE(); //ʹÄÜGPIOCʱÖÓ
__HAL_RCC_GPIOD_CLK_ENABLE(); //ʹÄÜGPIODʱÖÓ
//PC8,9,10,11,12
GPIO_Initure.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
GPIO_Initure.Mode = GPIO_MODE_AF_PP; //ÍÆÍ츴ÓÃ
GPIO_Initure.Pull = GPIO_PULLUP; //ÉÏÀ
GPIO_Initure.Speed = GPIO_SPEED_FREQ_VERY_HIGH; //¸ßËÙ
GPIO_Initure.Alternate = GPIO_AF12_SDMMC1;//GPIO_AF12_SDIO; //¸´ÓÃΪSDIO
HAL_GPIO_Init(GPIOC,&GPIO_Initure); //³õʼ»¯
//PD2
GPIO_Initure.Pin = GPIO_PIN_2;
GPIO_Initure.Mode = GPIO_MODE_AF_PP;
GPIO_Initure.Pull = GPIO_PULLUP;
GPIO_Initure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_Initure.Alternate = GPIO_AF12_SDMMC1;
HAL_GPIO_Init(GPIOD,&GPIO_Initure); //³õʼ»¯
#if (SD_DMA_MODE == 1) //ʹÓÃDMAģʽ
HAL_NVIC_SetPriority(DMA2_Channel4_IRQn, 2, 0); //·¢ËÍDMAÖжÏÓÅÏȼ¶
HAL_NVIC_EnableIRQ(DMA2_Channel4_IRQn);
HAL_NVIC_SetPriority(DMA2_Channel5_IRQn, 2, 0); //½ÓÊÕDMAÖжÏÓÅÏȼ¶
HAL_NVIC_EnableIRQ(DMA2_Channel5_IRQn);
HAL_NVIC_SetPriority(SDMMC1_IRQn,1,0); //ÅäÖÃSDMMC1Öжϣ¬ÇÀÕ¼ÓÅÏȼ¶2£¬×ÓÓÅÏȼ¶0
HAL_NVIC_EnableIRQ(SDMMC1_IRQn); //ʹÄÜSDMMC1ÖжÏ
SDRxDMAHandler.Instance=DMA2_Channel4;
SDRxDMAHandler.Init.Request=DMA_REQUEST_7;
SDRxDMAHandler.Init.Direction=DMA_PERIPH_TO_MEMORY;
SDRxDMAHandler.Init.PeriphInc=DMA_PINC_DISABLE;
SDRxDMAHandler.Init.MemInc=DMA_MINC_ENABLE;
SDRxDMAHandler.Init.PeriphDataAlignment=DMA_PDATAALIGN_WORD;
SDRxDMAHandler.Init.MemDataAlignment=DMA_PDATAALIGN_BYTE;// DMA_MDATAALIGN_BYTE DMA_MDATAALIGN_WORD
SDRxDMAHandler.Init.Mode = DMA_NORMAL;//DMA_NORMAL;DMA_CIRCULAR
SDRxDMAHandler.Init.Priority = DMA_PRIORITY_LOW;
HAL_DMA_Init(&SDRxDMAHandler);
__HAL_LINKDMA(hsd, hdmarx, SDRxDMAHandler); //½«½ÓÊÕDMAºÍSD¿¨µÄ·¢ËÍDMAÁ¬½ÓÆðÀ´
SDTxDMAHandler.Instance=DMA2_Channel5;
SDTxDMAHandler.Init.Request=DMA_REQUEST_7;
SDTxDMAHandler.Init.Direction=DMA_MEMORY_TO_PERIPH;
SDTxDMAHandler.Init.PeriphInc=DMA_PINC_DISABLE;
SDTxDMAHandler.Init.MemInc=DMA_MINC_ENABLE;
SDTxDMAHandler.Init.PeriphDataAlignment=DMA_PDATAALIGN_WORD;
SDTxDMAHandler.Init.MemDataAlignment=DMA_PDATAALIGN_BYTE;
SDTxDMAHandler.Init.Mode=DMA_NORMAL;
SDTxDMAHandler.Init.Priority=DMA_PRIORITY_LOW;
HAL_DMA_Init(&SDTxDMAHandler);
__HAL_LINKDMA(hsd, hdmatx, SDTxDMAHandler);//½«·¢ËÍDMAºÍSD¿¨µÄ·¢ËÍDMAÁ¬½ÓÆðÀ´
#endif
}
//µÃµ½¿¨ÐÅÏ¢
//cardinfo:¿¨ÐÅÏ¢´æ´¢Çø
//·µ»ØÖµ:´íÎó״̬
u8 SD_GetCardInfo(HAL_SD_CardInfoTypeDef *cardinfo)
{
u8 sta;
sta = HAL_SD_GetCardInfo(&SDCARD_Handler,cardinfo);
return sta;
}
#if (SD_DMA_MODE == 1) //DMAģʽ
/**
* @brief Configure the DMA to receive data from the SD card
* @retval
* HAL_ERROR or HAL_OK
*/
HAL_StatusTypeDef SD_DMAConfigRx(SD_HandleTypeDef *hsd)
{
HAL_StatusTypeDef status = HAL_ERROR;
/* Configure DMA Rx parameters */
SDRxDMAHandler.Instance = DMA2_Channel4;
SDRxDMAHandler.Init.Request = DMA_REQUEST_7;
SDRxDMAHandler.Init.Direction = DMA_PERIPH_TO_MEMORY;
SDRxDMAHandler.Init.PeriphInc = DMA_PINC_DISABLE;
SDRxDMAHandler.Init.MemInc = DMA_MINC_ENABLE;
SDRxDMAHandler.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
SDRxDMAHandler.Init.MemDataAlignment = DMA_PDATAALIGN_BYTE;
SDRxDMAHandler.Init.Mode = DMA_NORMAL;
SDRxDMAHandler.Init.Priority = DMA_PRIORITY_LOW;
/* Associate the DMA handle */
__HAL_LINKDMA(hsd,hdmarx,SDRxDMAHandler);
/* Stop any ongoing transfer and reset the state*/
HAL_DMA_Abort(&SDRxDMAHandler);
/* Deinitialize the Channel for new transfer */
HAL_DMA_DeInit(&SDTxDMAHandler);//????!!!DeInit???????!!!
/* Configure the DMA Channel */
status = HAL_DMA_Init(&SDRxDMAHandler);
return (status);
}
/**
* @brief Configure the DMA to transmit data to the SD card
* @retval
* HAL_ERROR or HAL_OK
*/
HAL_StatusTypeDef SD_DMAConfigTx(SD_HandleTypeDef *hsd)
{
HAL_StatusTypeDef status;
/* SDMMC1_TX Init */
SDTxDMAHandler.Instance = DMA2_Channel5;
SDTxDMAHandler.Init.Request = DMA_REQUEST_7;
SDTxDMAHandler.Init.Direction = DMA_MEMORY_TO_PERIPH;
SDTxDMAHandler.Init.PeriphInc = DMA_PINC_DISABLE;
SDTxDMAHandler.Init.MemInc = DMA_MINC_ENABLE;
SDTxDMAHandler.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
SDTxDMAHandler.Init.MemDataAlignment = DMA_PDATAALIGN_BYTE;
SDTxDMAHandler.Init.Mode = DMA_NORMAL;//??NORMAL??????,???
SDTxDMAHandler.Init.Priority = DMA_PRIORITY_LOW;
/* Associate the DMA handle */
__HAL_LINKDMA(hsd, hdmatx, SDTxDMAHandler);
/* Stop any ongoing transfer and reset the state*/
HAL_DMA_Abort(&SDTxDMAHandler);
/* Deinitialize the Channel for new transfer */
HAL_DMA_DeInit(&SDRxDMAHandler); //????!!!DeInit???????!!!
/* Configure the DMA Channel */
status = HAL_DMA_Init(&SDTxDMAHandler);
return (status);
}
//ͨ¹ýDMA¶ÁÈ¡SD¿¨Ò»¸öÉÈÇø
//buf:¶ÁÊý¾Ý»º´æÇø
//sector:ÉÈÇøµØÖ·
//blocksize:ÉÈÇø´óС(Ò»°ã¶¼ÊÇ512×Ö½Ú)
//cnt:ÉÈÇø¸öÊý
//·µ»ØÖµ:´íÎó״̬;0,Õý³£;ÆäËû,´íÎó´úÂë;
u8 SD_ReadBlocks_DMA(uint8_t *buf,uint64_t sector,uint32_t cnt)
{
u8 sd_state = HAL_OK;
if(SD_DMAConfigRx(&SDCARD_Handler) != HAL_OK)
{
return HAL_ERROR;
}
if(HAL_SD_ReadBlocks_DMA(&SDCARD_Handler,buf,sector,cnt) != HAL_OK)//¶ÁÈ¡³É¹¦
{
sd_state = HAL_ERROR;
}
return sd_state;
}
//дSD¿¨
//buf:дÊý¾Ý»º´æÇø
//sector:ÉÈÇøµØÖ·
//blocksize:ÉÈÇø´óС(Ò»°ã¶¼ÊÇ512×Ö½Ú)
//cnt:ÉÈÇø¸öÊý
//·µ»ØÖµ:´íÎó״̬;0,Õý³£;ÆäËû,´íÎó´úÂë;
u8 SD_WriteBlocks_DMA(uint8_t *buf,uint64_t sector,uint32_t cnt)
{
u8 sd_state = HAL_OK;
if(SD_DMAConfigTx(&SDCARD_Handler) != HAL_OK)
{
return HAL_ERROR;
}
if(HAL_SD_WriteBlocks_DMA(&SDCARD_Handler,buf,sector,cnt) != HAL_OK)//д³É¹¦
{
sd_state = HAL_ERROR;
}
return sd_state;
}
//¶ÁSD¿¨
//buf:¶ÁÊý¾Ý»º´æÇø
//sector:ÉÈÇøµØÖ·
//cnt:ÉÈÇø¸öÊý
//·µ»ØÖµ:´íÎó״̬;0,Õý³£;ÆäËû,´íÎó´úÂë;
u8 SD_ReadDisk(u8* buf,u32 sector,u32 cnt)
{
u8 sta=HAL_OK;
long long lsector=sector;
u8 n;
//if(SDCardInfo.CardType != CARD_SDSC)lsector<<=9;
if((u32)buf%4!=0)
{
for(n=0;n<cnt;n++)
{
//sta=SD_ReadBlocks_DMA((uint8_t*)SDIO_DATA_BUFFER,lsector+512*n,1);
sta=SD_ReadBlocks_DMA(SDIO_DATA_BUFFER,lsector+n,1);
memcpy(buf,SDIO_DATA_BUFFER,512);
buf+=512;
}
}else
{
sta=SD_ReadBlocks_DMA(buf,lsector, cnt);
}
return sta;
}
//дSD¿¨
//buf:дÊý¾Ý»º´æÇø
//sector:ÉÈÇøµØÖ·
//cnt:ÉÈÇø¸öÊý
//·µ»ØÖµ:´íÎó״̬;0,Õý³£;ÆäËû,´íÎó´úÂë;
u8 SD_WriteDisk(u8 *buf,u32 sector,u32 cnt)
{
u8 sta=HAL_OK;
long long lsector=sector;
u8 n;
//if(SDCardInfo.CardType != CARD_SDSC)lsector<<=9;
if((u32)buf%4!=0)
{
for(n=0;n<cnt;n++)
{
//sta=SD_WriteBlocks_DMA((uint8_t*)SDIO_DATA_BUFFER,lsector+512*n,1);//µ¥¸ösectorµÄд²Ù×÷
sta=SD_WriteBlocks_DMA(SDIO_DATA_BUFFER,lsector+n,1);//µ¥¸ösectorµÄд²Ù×÷
memcpy(SDIO_DATA_BUFFER,buf,512);
buf+=512;
}
}else
{
sta=SD_WriteBlocks_DMA(buf,lsector,cnt);//¶à¸ösectorµÄд²Ù×
}
return sta;
}
//SDMMC1ÖжϷþÎñº¯Êý
void SDMMC1_IRQHandler(void)
{
HAL_SD_IRQHandler(&SDCARD_Handler);
}
void DMA2_Channel4_IRQHandler(void)
{
HAL_DMA_IRQHandler(&SDRxDMAHandler);
//HAL_DMA_IRQHandler(SDCARD_Handler.hdmarx);
}
void DMA2_Channel5_IRQHandler(void)
{
HAL_DMA_IRQHandler(&SDTxDMAHandler);
//HAL_DMA_IRQHandler(SDCARD_Handler.hdmatx);
}
{var%20f='http://v.t.sina.com.cn/share/share.php?appkey=1515056452',u=z||d.location,p=['&url=',e(u),'&title=',e(t||d.title),'&source=',e(r),'&sourceUrl=',e(l),'&content=',c||'gb2312','&pic=',e(p||'')].join('');function%20a(){if(!window.open([f,p].join(''),'mb',['toolbar=0,status=0,resizable=1,width=440,height=430,left=',(s.width-440)/2,',top=',(s.height-430)/2].join('')))u.href=[f,p].join('');};if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else%20a();})(screen,document,encodeURIComponent,'','','https://www.xiaopingtou.cn/data/attach/logo/logo.png', '推荐 debug 的问题《SDMMC DMA FATFS读取SD卡》','https://www.xiaopingtou.net/q-105145.html','页面编码gb2312|utf-8默认gb2312'));){kind=link}
BYTE check_fs ( /* 0:FAT, 1:exFAT, 2:Valid BS but not FAT, 3:Not a BS, 4
FATFS* fs, /* File system object */
DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
)
{
fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */
if (move_window(fs, sect) != FR_OK) return 4; /* Load boot record */
test = ld_word(&fs->win[BS_55AA]);
if (ld_word(&fs->win[BS_55AA]) != 0xAA55) return 3; /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */
test = ld_dword(&fs->win[BS_FilSysType]);
if ((ld_dword(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) return 0; /* Check "FAT" string */
test = ld_dword(&fs->win[BS_FilSysType32]);
if ((ld_dword(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) return 0; /* Check "FAT" string */
#if _FS_EXFAT
if (!mem_cmp(&fs->win[BS_OEMName], "EXFAT ", 8)) return 1;
#endif
return 2;
}
一直返回3，读取到的值为0
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