Dear all,
I'd like to re-init sd-card when detect it plug/un-plug. But i face a issue when i re-mount sd-card it can not open file....My flow as below
bool init_sd_card(void)
{
static DIR dir;
static FILINFO fno;
static FIL file;
static FATFS fs;
uint32_t bytes_written;
FRESULT ff_result;
DSTATUS disk_state = STA_NOINIT;
char filename[50] = "new_testing_file.txt";
// Initialize FATFS disk I/O interface by providing the block device.
static diskio_blkdev_t drives[] =
{
DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_block_dev_sdc, block_dev), NULL)
};
diskio_blockdev_register(drives, ARRAY_SIZE(drives));
printf("Initializing disk 0 (SDC)...\r\n");
for (uint32_t retries = 3; retries && disk_state; --retries)
{
disk_state = disk_initialize(0);
}
if (disk_state)
{
printf("Disk initialization failed %d.\r\n", disk_state);
return false;
}
uint32_t blocks_per_mb = (1024uL * 1024uL) / m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_size;
uint32_t capacity = m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_count / blocks_per_mb;
printf("Capacity: %d MB\r\n", capacity);
printf("Mounting volume...\r\n");
ff_result = f_mount(&fs, "", 0);
if (ff_result)
{
printf("Mount failed %d.\r\n", ff_result);
return false;
}
printf("Sucessed.\r\n");
ff_result = f_open(&file, filename, FA_READ); //<============= HANG HERE
if (ff_result != FR_OK)
{
printf("Unable to open or create file: %s", filename);
return false;
}
printf("Open file %s ok, size %d\r\n", filename, f_size(&file));
(void) f_close(&file);
return true;
}
void sd_detect_event_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
DSTATUS disk_state = STA_NOINIT;
if(is_sd_present() == true)
{
printf("Init sd-card\r\n");
init_sd_card();
}
else
{
printf("DeInit sd-card\r\n");
if (f_mount(0, "", 0))
{
printf("UnMount failed\r\n");
}
}
}
what is the best re-init sd-card?
regards,
Tuyen
