Table of Contents
1. Insert your micro-SD card to sd slot.
2. Pin out setting
RCC -> High speed clock -> Crystal ceramic resonator
Up system clock to 216Mhz
SDMMC1->Mode->SD 4 bits wide bus
Fatfs->Sd card check.
3. SDMMC1 configuration
4.Code generation and editon
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_FATFS_Init();
MX_SDMMC1_SD_Init();
FATFS SDFatFs;
FIL MyFile;
char SDPath[4];
FRESULT res;
uint32_t byteswritten;
uint8_t wtext[] = “This is test of Fatfs with STM32F7-Discon”;
if(FATFS_LinkDriver(&SD_Driver, SD_Path) == 0)
{
if(f_mount(&SDFatFs, (TCHAR const*)SDPath, 0) != FR_OK)
{
Error_Handler();
}
else
{
if(f_open(&MyFile, “sd_test.txt”, FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)
{
Error_Handler();
}
else
{
res = f_write(&MyFile, wtext, sizeof(wtext)-1, (void *)&byteswritten);
char buf[]=”Hello Worldn”;
res = f_write(&MyFile,buf, sizeof(buf)-1, (void *)&byteswritten);
char buf1[]=”I am Duong”;
res = f_write(&MyFile,buf1, sizeof(buf1)-1, (void *)&byteswritten);
BSP_LED_On(LED1);
if((byteswritten == 0) || (res != FR_OK))
{
Error_Handler();
}
else
{
f_close(&MyFile);
}
}
}
}
FATFS_UnLinkDriver(SDPath);
while (1)
{
}
}
