STM32 copy file from sd card to usb drive (pen drive) using FATFS

[venky474]

Hey there I've just started learning STM32 so I don't know if its a small error or big one but can you help me solve.

I'm using STM32f407z and the task is to copy a file from SD card to the USB drive (pen drive) using reference blog of elm-chan FATFS. (http://elm-chan.org/fsw/ff/doc/open.html) 

The given code shows 0 error after compiling(build) but while debugging, It shows FR_DISK_ERR when f_open function is running for "myUSBFile". Thus it sometimes create the file but does not copy the content. Is there an issue with buffer or anything else I cant solve this error.  @Tesla DeLorean , @TDK , @waclawek.jan, @Peter BENSCH 

these are the config settings in CUBE MX,

SDIO->enabled  -> SD 4 bit wide bus,

USB_OTG_FS-> HOST_ONLY,

FATFS-> SD card and USB Disk both are enabled, (USE_LFN->enabled with static working buffer on the BSS, MAX_SS->4096)

USB_host->MSC (mass storage class),

oscillator->8MHZ

CLOCK -> 168MHz

USB CLOCK -> 48MHZ

This is my Code:

/* Includes ------------------------------------------------------------------*/

#include "main.h"

#include "fatfs.h"

#include "usb_host.h"

/* Private includes ----------------------------------------------------------*/

/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/

/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/

/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/

/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

SD_HandleTypeDef hsd;

 FATFS  SDFatFs, USBFatfs;    

 FIL    MySdFile, MyUSBFile;     

 BYTE buffer[4096];   

 FRESULT fr;          

 UINT br, bw;   

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

static void MX_SDIO_SD_Init(void);

void MX_USB_HOST_Process(void);

static void USBH_UserProcess(USBH_HandleTypeDef * phost, uint8_t id);

//bool UsbTest_Write(void);

/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**

  * @brief  The application entry point.

  * @retval int

  */

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_FATFS_Init();

  MX_USB_HOST_Init();

  /* USER CODE BEGIN 2 */

// Writing in SD_Card

  f_mount(&SDFatFS, "0:", 0);

  f_mount(&USBFatfs,"1:",0);

  /* USER CODE END 2 */

  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

    /* USER CODE END WHILE */

    MX_USB_HOST_Process();

    /* USER CODE BEGIN 3 */

/* Open source file on the drive 1 */

       fr = f_open(&MySdFile, "0:filename.txt", FA_READ);

if (fr) return (int)fr;

fr = f_open(&MyUSBFile, "1:filename2.txt", FA_CREATE_ALWAYS | FA_WRITE);

if (fr) return (int)fr;

for (;;) {

        fr = f_read(&MySdFile, buffer, sizeof buffer, &br); 

        if (br == 0) break; 

        fr = f_write(&MyUSBFile, buffer, br, &bw); 

        if (bw < br) break; 

}

   f_close(&MyUSBFile);

       f_close(&MySdFile);

}  

}

  /* USER CODE END 3 */

/**

  * @brief System Clock Configuration

  * @retval None

  */

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct = {0};

  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage

  */

  __HAL_RCC_PWR_CLK_ENABLE();

  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the RCC Oscillators according to the specified parameters

  * in the RCC_OscInitTypeDef structure.

  */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;

  RCC_OscInitStruct.HSEState = RCC_HSE_ON;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;

  RCC_OscInitStruct.PLL.PLLM = 4;

  RCC_OscInitStruct.PLL.PLLN = 168;

  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;

  RCC_OscInitStruct.PLL.PLLQ = 7;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

  {

    Error_Handler();

  }

  /** Initializes the CPU, AHB and APB buses clocks

  */

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;

  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)

  {

    Error_Handler();

  }

}

/**

  * @brief SDIO Initialization Function

  * @param None

  * @retval None

  */

static void MX_SDIO_SD_Init(void)

{

  /* USER CODE BEGIN SDIO_Init 0 */

  /* USER CODE END SDIO_Init 0 */

  /* USER CODE BEGIN SDIO_Init 1 */

  /* USER CODE END SDIO_Init 1 */

  hsd.Instance = SDIO;

  hsd.Init.ClockEdge = SDIO_CLOCK_EDGE_RISING;

  hsd.Init.ClockBypass = SDIO_CLOCK_BYPASS_DISABLE;

  hsd.Init.ClockPowerSave = SDIO_CLOCK_POWER_SAVE_DISABLE;

  hsd.Init.BusWide = SDIO_BUS_WIDE_1B;

  hsd.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE;

  hsd.Init.ClockDiv = 0;

  /* USER CODE BEGIN SDIO_Init 2 */

  /* USER CODE END SDIO_Init 2 */

}

/**

  * @brief GPIO Initialization Function

  * @param None

  * @retval None

  */

static void MX_GPIO_Init(void)

{

  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */

  __HAL_RCC_GPIOH_CLK_ENABLE();

  __HAL_RCC_GPIOF_CLK_ENABLE();

  __HAL_RCC_GPIOG_CLK_ENABLE();

  __HAL_RCC_GPIOE_CLK_ENABLE();

  __HAL_RCC_GPIOC_CLK_ENABLE();

  __HAL_RCC_GPIOA_CLK_ENABLE();

  __HAL_RCC_GPIOD_CLK_ENABLE();

  /*Configure GPIO pin Output Level */

  HAL_GPIO_WritePin(led1_GPIO_Port, led1_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */

  HAL_GPIO_WritePin(led2_GPIO_Port, led2_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */

  HAL_GPIO_WritePin(led3_GPIO_Port, led3_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin : led1_Pin */

  GPIO_InitStruct.Pin = led1_Pin;

  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

  HAL_GPIO_Init(led1_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : led2_Pin */

  GPIO_InitStruct.Pin = led2_Pin;

  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

  HAL_GPIO_Init(led2_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : led3_Pin */

  GPIO_InitStruct.Pin = led3_Pin;

  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

  HAL_GPIO_Init(led3_GPIO_Port, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**

  * @brief  This function is executed in case of error occurrence.

  * @retval None

  */

void Error_Handler(void)

{

  /* USER CODE BEGIN Error_Handler_Debug */

  /* User can add his own implementation to report the HAL error return state */

  __disable_irq();

  while (1)

  {

  }

  /* USER CODE END Error_Handler_Debug */

}

#ifdef  USE_FULL_ASSERT

/**

  * @brief  Reports the name of the source file and the source line number

  *         where the assert_param error has occurred.

  * @param  file: pointer to the source file name

  * @param  line: assert_param error line source number

  * @retval None

  */

void assert_failed(uint8_t *file, uint32_t line)

{

  /* USER CODE BEGIN 6 */

  /* User can add his own implementation to report the file name and line number,

     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* USER CODE END 6 */

}

#endif /* USE_FULL_ASSERT */

--------------------------------------------------------------------------------------------------------

[Tesla DeLorean]

I'd imagine  MX_USB_HOST_Process(); has to be called periodically, you can't have blocking code within the loop.

[venky474]

I did remove the loop but still it doesn't work, while debugging it shows FR_DISK_ERR.

[JTP1]

Hello

I suppose the problem is that you try to mount usb disk too early. Check your usb_host.c file and connect mount operation to the state when usb connection is estabilished. You must call mx_usb_host_process in loop to get usb connected. 

After the connection is ready, you can start file copy. During the coping, calling the mx_usb_host_process is not necessary.

Br J.T

[venky474]

Thank you for your reply,

I did what you said but still  the error is same,

and I tried to call the "switch(Appli_state)" function to the main and put the logic inside the ready state but when I did debugging it stopped at ready state. 

see the code below (I took a variable "int step=0;" to stop the copy function after the first time because it's in the loop.),

int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_SDIO_SD_Init();
MX_FATFS_Init();
MX_USB_HOST_Init();

f_mount(&SDFatFS, "0:", 0);

while (1)
{

/* USER CODE END WHILE */
MX_USB_HOST_Process();

/* USER CODE BEGIN 3 */
switch(Appli_state)
{
case APPLICATION_IDLE:
break;


case APPLICATION_START:
HAL_GPIO_WritePin(GPIOG,GPIO_PIN_1,GPIO_PIN_SET);

break;

case APPLICATION_READY:

if (step==0)
{
step=1;
f_mount(&USBHFatFS, "1:", 1);

fr = f_open(&USBHFile, "1:Blue.jpg", FA_READ);
fr = f_open(&SDFile, "0:color.jpg", FA_WRITE | FA_CREATE_ALWAYS);

for (;;)
{
fr = f_read(&USBHFile, buffer, sizeof buffer, &br); /* Read a chunk of data from the source file */
if (br == 0) break; /* error or eof */
fr = f_write(&SDFile, buffer, br, &bw); /* Write it to the destination file */
if (bw < br) break; /* error or disk full */
}
f_close(&USBHFile);
f_close(&SDFile);
}
break;

case APPLICATION_DISCONNECT:
HAL_GPIO_WritePin(GPIOG,GPIO_PIN_1,GPIO_PIN_RESET);
step=0;
break;

default:
break;
}

/* USER CODE END 3 */

}
}

-----------------------------------------------------------------------------------------------------------------------------

And I also tried to copy a file from same usb to usb  with different file names and it works, also the same case for the sd card it works But when I try to copy from sd to usb or vice versa  it get stuck on ready state.