/**
* @brief Initializes the SD card device.
* @param None
* @retval SD status
*/
uint8_t BSP_SD_Init(void)
{
uint8_t sd_state = MSD_OK;
/* uSD device interface configuration */
uSdHandle.Instance = SDMMC1;
uSdHandle.Init.ClockEdge = SDMMC_CLOCK_EDGE_RISING;
uSdHandle.Init.ClockBypass = SDMMC_CLOCK_BYPASS_DISABLE;
uSdHandle.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_DISABLE;
uSdHandle.Init.BusWide = SDMMC_BUS_WIDE_1B;
uSdHandle.Init.HardwareFlowControl = SDMMC_HARDWARE_FLOW_CONTROL_ENABLE;
uSdHandle.Init.ClockDiv = SDMMC_TRANSFER_CLK_DIV;
/* Msp SD Detect pin initialization */
SD_Detect_MspInit();
/* Check if the SD card is plugged in the slot */
if (BSP_SD_IsDetected() != SD_PRESENT)
{
return MSD_ERROR_SD_NOT_PRESENT;
}
/* Msp SD initialization */
BSP_SD_MspInit(&uSdHandle, NULL);
/* HAL SD initialization */
if (HAL_SD_Init(&uSdHandle) != HAL_OK)
{
sd_state = MSD_ERROR;
}
/* Configure SD Bus width */
if (sd_state == MSD_OK)
{
/* Enable wide operation */
if (HAL_SD_ConfigWideBusOperation(&uSdHandle, SDMMC_BUS_WIDE_4B) != HAL_OK)
{
sd_state = MSD_ERROR;
}
else
{
sd_state = MSD_OK;
}
}
return sd_state;
}
bool sdcard_power_on(void) {
if (!sdcard_is_present()) {
return false;
}
if (sd_handle.Instance) {
return true;
}
// SD device interface configuration
sd_handle.Instance = SDIO;
sd_handle.Init.ClockEdge = SDIO_CLOCK_EDGE_RISING;
#ifndef STM32H7
sd_handle.Init.ClockBypass = SDIO_CLOCK_BYPASS_DISABLE;
#endif
sd_handle.Init.ClockPowerSave = SDIO_CLOCK_POWER_SAVE_ENABLE;
sd_handle.Init.BusWide = SDIO_BUS_WIDE_1B;
sd_handle.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE;
sd_handle.Init.ClockDiv = SDIO_TRANSFER_CLK_DIV;
// init the SD interface, with retry if it's not ready yet
for (int retry = 10; HAL_SD_Init(&sd_handle) != HAL_OK; retry--) {
if (retry == 0) {
goto error;
}
mp_hal_delay_ms(50);
}
// configure the SD bus width for wide operation
#if defined(STM32F7)
// use maximum SDMMC clock speed on F7 MCUs
sd_handle.Init.ClockBypass = SDMMC_CLOCK_BYPASS_ENABLE;
#endif
if (HAL_SD_ConfigWideBusOperation(&sd_handle, SDIO_BUS_WIDE_4B) != HAL_OK) {
HAL_SD_DeInit(&sd_handle);
goto error;
}
return true;
error:
sd_handle.Instance = NULL;
return false;
}