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STM32F0 SPI2 with GPIOB AF partial work

Question asked by Mancini.Michele on Nov 3, 2012
Hi, I connect SD card to the stm32f0 discovery. I use the pin GPIOB pin 13, pin 14 , pin 15 use to alternate function.
The configuration work partial, sck and the MOSI work but the program stop to run when there is this funcion:
static BYTE stm32_spi_rw( BYTE out )
{
    while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET)
    {
    }
    SPI_SendData8(SPI_SD, out);
    while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET)
    {
    }
    return SPI_ReceiveData8(SPI2);
}

the program stop in the second line:
    while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET)
    {
    }


Why?

This is the configuration:
void power_on (void)
{
    SPI_InitTypeDef  SPI_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;
    volatile BYTE dummyread;

    /* Enable GPIO clock for CS */
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
    /* Enable SPI clock, SPI2 */
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);


      /* Enable SCK, MOSI and MISO GPIO clocks */
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);




    card_power(1);
    socket_cp_init();
    socket_wp_init();

    for (Timer1 = 25; Timer1; );    /* Wait for 250ms */


  GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_0);
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_0);
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_0);


    /* Configure I/O for Flash Chip select */
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    /* De-select the Card: Chip Select high */
    DESELECT();

  //Pin configurazione (SCK MISO MOSI)
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;   
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
  GPIO_Init(GPIOB, &GPIO_InitStructure);


    /* SPI configuration */
        SPI_I2S_DeInit(SPI2);
    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;

    SPI_Init(SPI2, &SPI_InitStructure);
    SPI_CalculateCRC(SPI2, DISABLE);
    SPI_Cmd(SPI2, ENABLE);

    /* drain SPI */
    while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET) { ; }
    dummyread = SPI_ReceiveData8(SPI2);

           
}





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