无法在 STM32 上使用 FatFS 挂载 SD [英] Cannot mount SD using FatFS on STM32

问题描述

我正在尝试使用 STM32F405 芯片写入 MicroSD 卡.
引脚连接正确，MicroSD 卡插槽上的每个引脚都可以使用 HAL_GPIO_WritePin 写入.(用示波器测量)我正在使用 CubeMX 为 TrueStudio 生成初始化代码，所以希望那里也一切正常.但是当我运行以下代码时，f_mount 返回 FR_DISK_ERR.MicroSD 卡可以写入和读取.如果我使用不同的设备编号，即1:"，我会得到 FR_INVALID_DRIVE

I'm trying to write to a MicroSD-Card using STM32F405 chip.
The pins are connected correctly and each pin on the MicroSD-Card slot can be written to by using HAL_GPIO_WritePin. (Messured with ossciloscope) I'm using CubeMX to generate the init code for TrueStudio, so hopefully everything is ok there as well. But when I run the following code, f_mount returns FR_DISK_ERR. The MicroSD-Card can be written to and read from. If I use a different Device number, i.e. "1:", I get FR_INVALID_DRIVE

所以我的问题是:除了有故障的 MicroSD 卡之外，什么会导致 FR_DISK_ERR?

So my question is: what could cause FR_DISK_ERR except a faulty MicroSD-Card?

这是我目前的代码:

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();

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

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_SDIO_SD_Init();
  MX_FATFS_Init();

  /* USER CODE BEGIN WHILE */
  FATFS fileSystem;
  FIL testFile;
  uint8_t testBuffer[16] = "SD write success";
  UINT testBytes;
  FRESULT res;

  while((res = f_mount(&fileSystem, SD_MOUNT_PATH, 1)) != FR_OK){
      printf("%d", res); //used to debug res, only for TrueStudio Debugger
  }


    uint8_t path[13] = "testfile.txt";
    path[12] = '\0';

    res = f_open(&testFile, (char*)path, FA_WRITE | FA_CREATE_ALWAYS);

    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_6, GPIO_PIN_RESET);
    res = f_write(&testFile, testBuffer, 16, &testBytes);
    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_7, GPIO_PIN_RESET);

    res = f_close(&testFile);
    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_RESET);


}

在MX_FATFS_Init() FATFS_LinkDriver(&SD_Driver, SD_Path) 中被调用并返回0.

in MX_FATFS_Init() FATFS_LinkDriver(&SD_Driver, SD_Path) is called and returns 0.

推荐答案

如果没有 SD_MOUNT_PATH 宏，f_mount 调用是否如下所示:f_mount(&fileSystem, "0:", 1) ?'

Without the SD_MOUNT_PATH macro, does the f_mount call look like this: f_mount(&fileSystem, "0:", 1) ?'

你是说f_open、f_write即使f_mount失败也返回FR_OK?！

Are you saying that f_open, f_write return FR_OK even if f_mount fails?!

FR_DISK_ERR 通常表示 disk_read() 或 disk_write() 失败.尝试在使用 f_mount() 之前以及在 fatfs 函数调用之间提供 100 毫秒或 1 秒的延迟.

FR_DISK_ERR usually means disk_read() or disk_write() failed. Try giving 100ms or 1 sec delay before using f_mount() and between between fatfs function calls.

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