STM32F215 SDIO error: no clock

[v239955]

Posted on July 29, 2011 at 14:43

I use STM32F215.

I run uSDCard example from StandartPeriphLibrary. But there is no clock available at pin 53 ( PC12 ) and SD is not work. There is bug? My init code is:

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOD, ENABLE);

  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);   GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_SDIO);

  // 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_25MHz;   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);

  // Configure PD.02 CMD line

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;   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);        RCC_APB2PeriphResetCmd(RCC_APB2Periph_SDIO, ENABLE);   RCC_APB2PeriphResetCmd(RCC_APB2Periph_SDIO, DISABLE);     RCC_APB2PeriphClockCmd(  RCC_APB2Periph_SDIO, ENABLE  );

  RCC_AHB1PeriphClockCmd(  RCC_AHB1Periph_DMA2, ENABLE  );

    //!< Power ON Sequence ---------------------------------------------------   //!< Configure the SDIO peripheral   //!< SDIOCLK = HCLK, SDIO_CK = HCLK/(2 + SDIO_INIT_CLK_DIV   //!< on STM32F2xx devices, SDIOCLK is fixed to 48MH   //!< SDIO_CK for initialization should not exceed 400 KHz     SDIO_InitStructure2.SDIO_ClockDiv = 0x78;   SDIO_InitStructure2.SDIO_ClockEdge = SDIO_ClockEdge_Rising;   SDIO_InitStructure2.SDIO_ClockBypass = SDIO_ClockBypass_Disable;   SDIO_InitStructure2.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;   SDIO_InitStructure2.SDIO_BusWide = SDIO_BusWide_1b;   SDIO_InitStructure2.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;   SDIO_Init(&SDIO_InitStructure2);

  //!< Set Power State to ON */

  SDIO_SetPowerState(SDIO_PowerState_ON);

  SDIO_ClockCmd(ENABLE);

     while( 1);

  SDIO_CmdInitStructure2.SDIO_Argument = 0x0;

  SDIO_CmdInitStructure2.SDIO_CmdIndex = 0;   SDIO_CmdInitStructure2.SDIO_Response = SDIO_Response_No;   SDIO_CmdInitStructure2.SDIO_Wait = SDIO_Wait_No;   SDIO_CmdInitStructure2.SDIO_CPSM = SDIO_CPSM_Enable;

  //RCC_APB2PeriphResetCmd(RCC_APB2Periph_SDIO, ENABLE);

    //while( 1 ){   SDIO_SendCommand(&SDIO_CmdInitStructure2);       //while( (SDIO_GetFlagStatus(SDIO_FLAG_CMDSENT) == RESET) );       //while(1); I think when while(1) is running, clock will appear, but clock is in low state always. #sdio #stm32f215