Posted on February 22, 2017 at 09:18
Hey all,
I want to write to SD card, I'm Using cube-mxstm32Nucleo-L476RG MCU ,and 4-pin SD card,
I attach my cube project, the main program has the following code:
declaring and init :
FATFS SDFatFs;
FIL MyFile;
extern char SD_Path[4]; /* SD logical drive path */
/* USER CODE END 0 */
int main(void)
{
/* USER CODE BEGIN 1 */
FRESULT res;
uint32_t byteswriten,byteread;
uint8_t wtext[]='Hello from STM32!!\0';
/* 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_DMA_Init();
MX_DFSDM1_Init();
MX_SDMMC1_SD_Init();
MX_FATFS_Init();
MX_TIM6_Init();
MX_SDMMC1_SD_Init();
I am trying to write to sd card by the following code:
if(res=f_mount(&SDFatFs,(TCHAR const*)SD_Path,0)!=FR_OK)
{
Error_Handler();
}
else
{
if(res=f_open(&MyFile,'0:/mywrite.txt',FA_CREATE_ALWAYS | FA_WRITE ) != FR_OK)
{
Error_Handler();
}
else
{
res=f_write(&MyFile,wtext,sizeof(wtext),(void*)&byteswriten);
if((byteswriten==0) || (res!=FR_OK))
{
Error_Handler();
}
else
{
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);
}
f_close(&MyFile);
}
}
I get FR_NO_FILESYSTEM if the SD is connected and if the SD is not connected, I get FR_NOT_READY,
Thanks for any help.
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