/**
* @brief Gets the current SD card data status.
* @param None
* @retval Data transfer state.
*/
uint8_t BSP_SD_GetCardState(void)
{
HAL_SD_CardStateTypedef card_state;
card_state = HAL_SD_GetCardState(&uSdHandle);
if (card_state == HAL_SD_CARD_TRANSFER)
{
return (SD_TRANSFER_OK);
}
else if ((card_state == HAL_SD_CARD_SENDING) ||
(card_state == HAL_SD_CARD_RECEIVING) ||
(card_state == HAL_SD_CARD_PROGRAMMING))
{
return (SD_TRANSFER_BUSY);
}
else
{
return (SD_TRANSFER_ERROR);
}
}
STATIC HAL_StatusTypeDef sdcard_wait_finished(SD_HandleTypeDef *sd, uint32_t timeout) {
// Wait for HAL driver to be ready (eg for DMA to finish)
uint32_t start = HAL_GetTick();
for (;;) {
// Do an atomic check of the state; WFI will exit even if IRQs are disabled
uint32_t irq_state = disable_irq();
if (sd->State != HAL_SD_STATE_BUSY) {
enable_irq(irq_state);
break;
}
__WFI();
enable_irq(irq_state);
if (HAL_GetTick() - start >= timeout) {
return HAL_TIMEOUT;
}
}
// Wait for SD card to complete the operation
for (;;) {
HAL_SD_CardStateTypedef state = HAL_SD_GetCardState(sd);
if (state == HAL_SD_CARD_TRANSFER) {
return HAL_OK;
}
if (!(state == HAL_SD_CARD_SENDING || state == HAL_SD_CARD_RECEIVING || state == HAL_SD_CARD_PROGRAMMING)) {
return HAL_ERROR;
}
if (HAL_GetTick() - start >= timeout) {
return HAL_TIMEOUT;
}
__WFI();
}
return HAL_OK;
}