stm32f_open失败

Posted 2023-03-27

STM32用CubeMX创建SDIO+FatFs，f_Open失败

如题，具体环境是CubeMX最新版，HAL库最新版，MDK5.24a，STLINKv2-1，板子是STM32F407Vet6核心板（某宝四五十块钱）。
SDIO单独测试TF卡（4G卡肯定不是正版）成功，可以读出CSD，CID，卡的状态，卡的容量等,SDIO四线无DMA读写正常。

本人前前后后试过无数次，好几个月，现在不得不弄好！感谢大佬的帮助！
CubeMX:SDIO四线，无DMA，无SDIO全局中断，勾选FatFS文件系统，文件系统加入长名STACK，单片机HEAP-0x800，STACK-0x1000
具体代码：
主程序：

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
FRESULT res; /* FatFs function common retSDult code */
uint32_t byteswritten, bytesread; /* File write/read counts */
uint8_t wtext[] = "This is STM32 working with FatFs"; /* File write buffer */
uint8_t rtext[100]; /* File read buffer */
/* USER CODE END PV */

int main(void)

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/* MCU Configuration----------------------------------------------------------*/

/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();

/* USER CODE BEGIN Init */

/* USER CODE END Init */

/* Configure the system clock */
SystemClock_Config();

/* USER CODE BEGIN SysInit */

/* USER CODE END SysInit */

/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_SDIO_SD_Init();
MX_USART2_UART_Init();
MX_FATFS_Init();
/* USER CODE BEGIN 2 */

****************************************************
从HAL库中F4Disco里抄来的代码
****************************************************
if(f_mount(&SDFatFS, (TCHAR const*)SDPath, 0) != FR_OK)

/* FatFs Initialization Error */
Error_Handler();

else

/* Create and Open a new text file object with write access */
if(f_open(&SDFile, "STM32.TXT", FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)

/* 'STM32.TXT' file Open for write Error */
Error_Handler();

else

/* Write data to the text file */
res = f_write(&SDFile, wtext, sizeof(wtext), (void *)&byteswritten);

if((byteswritten == 0) || (retSD != FR_OK))

/* 'STM32.TXT' file Write or EOF Error */
Error_Handler();

else

/* Close the open text file */
f_close(&SDFile);

/* Open the text file object with read access */
if(f_open(&SDFile, "STM32.TXT", FA_READ) != FR_OK)

/* 'STM32.TXT' file Open for read Error */
Error_Handler();

else

/* Read data from the text file */
res = f_read(&SDFile, rtext, sizeof(rtext), (void *)&bytesread);

if((bytesread == 0) || (retSD != FR_OK))

/* 'STM32.TXT' file Read or EOF Error */
Error_Handler();

else

/* Close the open text file */
f_close(&SDFile);

/* Compare read data with the expected data */
if((bytesread != byteswritten))

/* Read data is different from the expected data */
Error_Handler();

else

/* Success of the demo: no error occurrence */
HAL_GPIO_WritePin(GPIOA, D2_Pin|D3_Pin, GPIO_PIN_SET);







/* Unlink the USB disk I/O driver */
FATFS_UnLinkDriver(SDPath);
/* USER CODE END 2 */

/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)


/* USER CODE END WHILE */

/* USER CODE BEGIN 3 */


/* USER CODE END 3 */



****************************************************
单步调试结果 Sd_diskio.c中死循环
****************************************************
DRESULT SD_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)

DRESULT res = RES_ERROR;
ReadStatus = 0;
uint32_t timeout;
#if (ENABLE_SD_DMA_CACHE_MAINTENANCE == 1)
uint32_t alignedAddr;
#endif

if(BSP_SD_ReadBlocks_DMA((uint32_t*)buff,
(uint32_t) (sector),
count) == MSD_OK)

/* Wait that the reading process is completed or a timeout occurs */
timeout = HAL_GetTick();
while((ReadStatus == 0) && ((HAL_GetTick() - timeout) < SD_TIMEOUT))//在此处无限循环


/* incase of a timeout return error */
if (ReadStatus == 0)

res = RES_ERROR;

else

ReadStatus = 0;
timeout = HAL_GetTick();

while((HAL_GetTick() - timeout) < SD_TIMEOUT)

if (BSP_SD_GetCardState() == SD_TRANSFER_OK)

res = RES_OK;
#if (ENABLE_SD_DMA_CACHE_MAINTENANCE == 1)
/*
the SCB_InvalidateDCache_by_Addr() requires a 32-Byte aligned address,
adjust the address and the D-Cache size to invalidate accordingly.
*/
alignedAddr = (uint32_t)buff & ~0x1F;
SCB_InvalidateDCache_by_Addr((uint32_t*)alignedAddr, count*BLOCKSIZE + ((uint3 参考技术A 下面两个原因。
stm32f_open失败，有两个可能的原因：
1，相对路径错了；
2，文件名命名的有问题，比如打开fopen("1.txt","r");在相对路径下创建文本文件的的时候，将该文件命名为1 就可以了，不要加后缀.txt 。

如果是字符转义，肯定就是无法打开一个不存在的文件，只要通过获取错误码就可以解决这个问题。