Posted on April 19, 2015 at 23:36
I have a uSD card on a custom shield conected by SDIO (PC12, PC8, PD2 lines)
I debug software and hardware (with my oscilloscope). I focus on this function
static HAL_SD_ErrorTypedef SD_Initialize_Cards(SD_HandleTypeDef *hsd)
{
SDIO_CmdInitTypeDef sdio_cmdinitstructure;
HAL_SD_ErrorTypedef errorstate = SD_OK;
uint16_t sd_rca = 1;
if(SDIO_GetPowerState(hsd->Instance) == 0) /* Power off */
{
errorstate = SD_REQUEST_NOT_APPLICABLE;
return errorstate;
}
if(hsd->CardType != SECURE_DIGITAL_IO_CARD)
{
/* Send CMD2 ALL_SEND_CID */
sdio_cmdinitstructure.Argument = 0;
sdio_cmdinitstructure.CmdIndex = SD_CMD_ALL_SEND_CID;
sdio_cmdinitstructure.Response = SDIO_RESPONSE_LONG;
sdio_cmdinitstructure.WaitForInterrupt = SDIO_WAIT_NO;
sdio_cmdinitstructure.CPSM = SDIO_CPSM_ENABLE;
SDIO_SendCommand(hsd->Instance, &sdio_cmdinitstructure);
/* Check for error conditions */
errorstate = SD_CmdResp2Error(hsd);
if(errorstate != SD_OK)
{
return errorstate;
}
I have TIMEOUT error from CMD2 and I don't have any signal change on D0 during SDIO_SendCommand. I have clk, and command signal
I put this code on gpio_init, just to test PC8 pin:
GPIO_InitStruct.Pin = GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_8, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_8, GPIO_PIN_RESET);
and pin is ok.
any idea?
BTW I think that there is a bug on Cube MX SDIO initialization. It generate this code:
void MX_SDIO_SD_Init(void)
{
hsd.Instance = SDIO;
hsd.Init.ClockEdge = SDIO_CLOCK_EDGE_RISING;
hsd.Init.ClockBypass = SDIO_CLOCK_BYPASS_DISABLE;
hsd.Init.ClockPowerSave = SDIO_CLOCK_POWER_SAVE_DISABLE;
hsd.Init.BusWide = SDIO_BUS_WIDE_1B;
hsd.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE;
hsd.Init.ClockDiv = 0;
}
I think that there is a missing HAL_SD_Init(&hsd, &SDCardInfo);
