Help with SDIO

[Palacios.Bruno]

Posted on March 04, 2013 at 18:09

Hi guys. First of all, sorry if my english is bad.

I have a problem configuring a uSD and SDIO port. I'm using the ST SDIO example for STM32f4 discovery board and I cant comunicate with de micro SD. 

I checked the pins config, clock speed and everything seems to be ok. But if I check the pins voltaje, all are at 3v (by the pull ups resistors) and the clock is at 0v always.

When I see the clock signal with my oscilloscope I can see it never starts. So I get a SD_CMD_RSP_TIMEOUT from CmdError().

Here is the code.

/**************************************************/

int main(void)

{

  /*!< At this stage the microcontroller clock setting is already configured, 

       this is done through SystemInit() function which is called from startup

       file (startup_stm32f4xx.s) before to branch to application main.

       To reconfigure the default setting of SystemInit() function, refer to

       system_stm32f4xx.c file

     */

  /* Interrupt Config */

  NVIC_Configuration();

  /*------------------------------ SD Init ---------------------------------- */

  if ((Status = SD_Init()) != SD_OK) { 

    STM_EVAL_LEDOn(LED6);  // Error LED

  }

 [...]

while(1);

}

/**************************************************/

SD_Error SD_Init(void) {

__IO SD_Error errorstatus = SD_OK;

/* SDIO Peripheral Low Level Init */

SD_LowLevel_Init();

errorstatus = SD_PowerON();

if (errorstatus != SD_OK) {

/*!< CMD Response TimeOut (wait for CMDSENT flag) */

return (errorstatus);

[...]

}

/*******************************************/

void SD_LowLevel_Init(void)

{

  GPIO_InitTypeDef  GPIO_InitStructure;

  /* GPIOC and GPIOD Periph clock enable */

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOD | SD_DETECT_GPIO_CLK, ENABLE);

  /* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;

  GPIO_Init(GPIOC, &GPIO_InitStructure);

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_SDIO);

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_SDIO);

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SDIO);

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_SDIO);

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SDIO);

  /* Configure PD.02 CMD line */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;

  GPIO_Init(GPIOD, &GPIO_InitStructure);

  GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_SDIO);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;

  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Configure PC.12 pin: CLK pin */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

  GPIO_Init(GPIOC, &GPIO_InitStructure);

  

  /*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */

  GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;

  GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);

  /* Enable the SDIO APB2 Clock */

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, ENABLE);

  /* Enable the DMA2 Clock */

  RCC_AHB1PeriphClockCmd(SD_SDIO_DMA_CLK, ENABLE);

  SDIO_SetPowerState(SDIO_PowerState_ON);

  SDIO_ClockCmd(ENABLE);

}

/*******************************************/

SD_Error SD_PowerON(void) {

__IO SD_Error errorstatus = SD_OK;

uint32_t response = 0, count = 0, validvoltage = 0;

uint32_t SDType = SD_STD_CAPACITY;

/*!< Power ON Sequence -----------------------------------------------------*/

/*!< Configure the SDIO peripheral */

/*!< SDIO_CK = SDIOCLK / (SDIO_INIT_CLK_DIV + 2) */

/*!< on STM32F4xx devices, SDIOCLK is fixed to 48MHz */

/*!< SDIO_CK for initialization should not exceed 400 KHz */

SDIO_InitStructure.SDIO_ClockDiv = 120; //SDIO_INIT_CLK_DIV;

SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;

SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;

SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;

SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_4b;

SDIO_InitStructure.SDIO_HardwareFlowControl =

SDIO_HardwareFlowControl_Disable;

SDIO_Init(&SDIO_InitStructure);

/*!< Set Power State to ON */

SDIO_SetPowerState(SDIO_PowerState_ON);

/*!< Enable SDIO Clock */

SDIO_ClockCmd(ENABLE);

/*!< CMD0: GO_IDLE_STATE ---------------------------------------------------*/

/*!< No CMD response required */

SDIO_CmdInitStructure.SDIO_Argument = 0x0;

SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_GO_IDLE_STATE;

SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_No;

SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;

SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;

SDIO_SendCommand(&SDIO_CmdInitStructure);

errorstatus = CmdError();

if (errorstatus != SD_OK) {

/*!< CMD Response TimeOut (wait for CMDSENT flag) */

return (errorstatus);

}

/*******************************************/

As you can see I only paste the parts of the code that my system execute.

Please, help me! 

#sdcard-stm32f4-sdio-fatfs

[Tesla DeLorean]

Posted on March 04, 2013 at 18:46

The nonsense with PD12..15 causes you to misconfigure the clock pin.

Also setting the slew rate to 2 MHz probably isn't where you want to be when running the SDIO at 24 MHz.

I've previously posted working code to attach an MicroSD card to the STM32F4-Discovery and use FatFs

[Palacios.Bruno]

Posted on March 04, 2013 at 19:08

Thanks for you reply!

Same Error with your example =/. And the clock pin still at 0v.

Any idea what's happening or what could be the error?

regards

[Palacios.Bruno]

Posted on March 06, 2013 at 17:23

Solved!

I forgot to add SystemInit() before main() in Startup_stm32f4xx.c

Thanks!

[jschmoetz]

Posted on July 11, 2013 at 15:17

________________

Attachments :

Question.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I1Ai&d=%2Fa%2F0X0000000bjL%2FlPmLIBr6MprA4uY_imUmvAYitt0miDftlDtjpawoZxI&asPdf=false

[marwa2]

Posted on September 12, 2013 at 12:01

I want to ask how I see results of sdio signals on logical analyzer.

I tried to make 2 groups of signal 

1st group: cmd and clock.

2nd group: data lines and clock.

But I don't know if this true or not? 

My code in while(1) is the following

   //CMD0 Go idle.

 //Structure.

            SDIO_CmdInitTypeDef SDIO_CmdInitStructure;                    

            SDIO_CmdInitStructure.SDIO_Argument = 0x0;

            SDIO_CmdInitStructure.SDIO_CmdIndex = 0x00;

            SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_No;

            SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;

            SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;

            SDIO_SendCommand(&SDIO_CmdInitStructure);

If you have another way to see this signals please tell me.

Thank.

I wait your help.

[marwa2]

Posted on September 14, 2013 at 14:03

I wait your reply. Where is your reply??

[Tesla DeLorean]

Posted on September 15, 2013 at 00:14

I wait your reply. Where is your reply??

Perhaps no one currently browsing the forum has a logic analyzer attached to the SDIO bus?

I guess if I wanted to observe SDIO bus traffic, I'd just use the example code from the firmware library and have it do block reads in a loop.