Issue with STM32H743ZI2 using SDMMC and µSD card
I am trying to configure my STM32H743ZI2 to work with a microSD card. For data logging purposes.
schematic of the SD card adaptor:
I configured the following in CUBEMX:
SDMMC1 as SD 4 bits Wide bus with SDMMC1 global interrupt enabled (all other settings are default)
FATFS mode SD Card with everything default.
Changed stack and heap size : 0x400 heap size, 0x800 stack size.
My clock config:
When i run the following code :
void SystemClock_Config(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 */
FRESULT res; /* FatFs function common result code */
uint32_t byteswritten, bytesread; /* File write/read counts */
uint8_t wtext[] = "STM32 FATFS works great!"; /* File write buffer */
uint8_t rtext[_MAX_SS];/* File read buffer */
/* USER CODE END 1 */
/* USER CODE END 1 */
/* Enable I-Cache---------------------------------------------------------*/
SCB_EnableICache();
/* 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_ETH_Init();
MX_USART3_UART_Init();
MX_USB_OTG_FS_PCD_Init();
MX_SDMMC1_SD_Init();
MX_FATFS_Init();
/* USER CODE BEGIN 2 */
if(f_mount(&SDFatFS, (TCHAR const*)SDPath, 0) != FR_OK)
{
Error_Handler();
}
else
{
if(f_mkfs((TCHAR const*)SDPath, FM_ANY, 0, rtext, sizeof(rtext)) != FR_OK)
{
Error_Handler();
}
else
{
//Open file for writing (Create)
if(f_open(&SDFile, "STM32.TXT", FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)
{
Error_Handler();
}
else
{
//Write to the text file
res = f_write(&SDFile, wtext, strlen((char *)wtext), (void *)&byteswritten);
if((byteswritten == 0) || (res != FR_OK))
{
Error_Handler();
}
else
{
f_close(&SDFile);
}
}
}
}
f_mount(&SDFatFS, (TCHAR const*)NULL, 0);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}The following happens:
MX_SDMMC1_SD_Init(); and MX_FATFS_Init(); initialise without error.
(52) f_mount(&SDFatFS, (TCHAR const*)SDPath, 0) also returns no error
But
f_mkfs((TCHAR const*)SDPath, FM_ANY, 0, rtext, sizeof(rtext))
Gets me stuck in the following procedure:
part of : "static uint32_t SD_SendSDStatus(SD_HandleTypeDef *hsd, uint32_t *pSDstatus)"
while (!__HAL_SD_GET_FLAG(hsd, SDMMC_FLAG_RXOVERR | SDMMC_FLAG_DCRCFAIL | SDMMC_FLAG_DTIMEOUT | SDMMC_FLAG_DATAEND))
{
if (__HAL_SD_GET_FLAG(hsd, SDMMC_FLAG_RXFIFOHF))
{
for (count = 0U; count < 8U; count++)
{
*pData = SDMMC_ReadFIFO(hsd->Instance);
pData++;
}
}
if ((HAL_GetTick() - tickstart) >= SDMMC_DATATIMEOUT)
{
return HAL_SD_ERROR_TIMEOUT;
}
}This procedure practically never ends since SDMMC datatimeout has a value of 0xFFFFFFFFU
When i test the signal on the oscilloscope i notice that:
From the start of the f_mkfs function the CLK is always 400KHz, even if i change the clockvalues
CD responds with short HIGH signal.
All data busses are completely empty, (no data)
I added a zip file of my fully configured SD test program.