Hi
I am using nRF52840 with SDK 15.3.
I have a project where I uses FatFS to write to a SD-card with SPI interface (SPIM3). This works very well.
I am now trying to shut down the power to SD-card between writes, but I am facing some problems reinitializing the system again. My test project doesn't even turn off power to SD-card, but just tries to initialize -> shutdown -> reinitialize.
Do you have any thoughts about what could be wrong?
I have made a small project where I do the following steps:
Init_SDcard_HW(); //Initializes SPIM3 to be used with SD-card
uint8_t SD_Err = Init_SDcard_FatFS(); //Initializes the SD-card
nrf_delay_ms(100); //HERE I AM ABLE TO RD/WR FROM SD-CARD
sd_card_shutdown();
nrf_delay_ms(100);
sd_card_remount(); //THIS FUNCTION FAILS WHEN F_MOUNT IS CALLED WITH NRF_DISK_ERR
nrf_delay_ms(100);
SD_Err = Init_SDcard_FatFS(); //Initializes the SD-card
nrf_delay_ms(100);
My functions looks like:
void Init_SDcard_HW(void)
{
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));
}
uint8_t Init_SDcard_FatFS(void)
{
FILINFO fno;
FRESULT ff_result;
DSTATUS disk_state = STA_NOINIT;
for (uint32_t retries = 3; retries && disk_state; --retries)
{
disk_state = disk_initialize(0);
}
if (disk_state)
{
Error_Code = 1;
return 1;
}
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;
ff_result = f_mount(&fs, "", 1);
if (ff_result)
{
Error_Code = 2;
return 2;
}
}
void sd_card_shutdown(void){
f_mount(NULL, "", 1);
m_block_dev_sdc.block_dev.p_ops->uninit(&m_block_dev_sdc.block_dev);
}
FRESULT sd_card_remount(void) {
ret_code_t rc = m_block_dev_sdc.block_dev.p_ops->init(&m_block_dev_sdc.block_dev, NULL, NULL);
if (rc != NRF_SUCCESS)
{
return rc;
}
DSTATUS disk_state = disk_initialize(0);
if (disk_state)
{
return disk_state;
}
memset(&fs, 0, sizeof(fs));
FRESULT res = f_mount(&fs, "", 1);
if (res != FR_OK)
{
return res;
}
}
