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stm32f2xx pb 14 hardware fault

Question asked by raveendran.akshay on Nov 1, 2013
Latest reply on Nov 1, 2013 by Clive One
When i use the command
     GPIO_PinAFConfig(GPIOB, GPIO_Pin_14 ,GPIO_AF_SPI2);
the controller goes to a hardware fault.
my init function is 

void SPI_FLASH_Init(void)
{
  SPI_InitTypeDef  SPI_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;
   
  /* Enable SPI2, GPIOA and GPIOBclocks */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2 , ENABLE);
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
  /* Configure SPI2 pins: SCK, MISO and MOSI */
  GPIO_PinAFConfig(GPIOB, GPIO_Pin_13 ,GPIO_AF_SPI2);
     GPIO_PinAFConfig(GPIOB, GPIO_Pin_14 ,GPIO_AF_SPI2);
     GPIO_PinAFConfig(GPIOB, GPIO_Pin_15 ,GPIO_AF_SPI2);
     
  /* Configure PB.2 as Output push-pull, used as Flash Chip select */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
     GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_Init(GPIOB, &GPIO_InitStructure);


     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
     GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
     GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
     GPIO_Init(GPIOB, &GPIO_InitStructure);
  /* Deselect the FLASH: Chip Select high */
  SPI_FLASH_CS_HIGH();
     
  /* SPI2 configuration */ 
  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_High;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_Init(SPI2, &SPI_InitStructure);
  
  /* Enable SPI2  */
  SPI_Cmd(SPI2, ENABLE);   
}

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