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.cThanks!

[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 12:01I 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.