Probleme mit STM32F103 und SPI1 remapping

//Pseudo-Functions

#define CS_low()      GPIOC->ODR &= ~(1<<14);

#define CS_high()      GPIOC->ODR |= (1<<14);

void spi_init(void)//set spi speed and settings 

{

  SPI_InitTypeDef SPI_InitStruct;

  GPIO_InitTypeDef GPIO_InitStruct;

  RCC_APB1PeriphClockCmd(RCC_APB2Periph_SPI1 | RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC, ENABLE);

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, DISABLE); //Errata -> Don't use Remapped SPI1 with activated I2C1-Clock

  // GPIO pins for MISO, MOSI and SCK

  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_4 | GPIO_Pin_3;

  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOB, &GPIO_InitStruct);

  //GPIO PortC 14 ->CS

  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_14;

  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;

  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOC, &GPIO_InitStruct);

  GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);

  GPIO_PinRemapConfig(GPIO_Remap_SPI1, ENABLE);

  SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;

  SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge;

  SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low;

  SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b;

  SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex;//SPI_Direction_1Line_Tx;

  SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;

  SPI_InitStruct.SPI_Mode = SPI_Mode_Master;

  SPI_InitStruct.SPI_NSS = SPI_NSS_Soft | SPI_NSSInternalSoft_Set;

  SPI_Init(SPI1, &SPI_InitStruct); 

  SPI_Cmd(SPI1, ENABLE);

  CS_high();

}

void spi_send(uint8_t spi_data)//send spi data to display

{

  SPI1->DR = spi_data;                // Write data to be transmitted to the SPI data register

  while (!(SPI1->SR & (SPI_I2S_FLAG_TXE)));      // Wait until transmit complete

  while (SPI1->SR & (SPI_I2S_FLAG_BSY));        // Wait until SPI is not busy anymore

}

uint8_t spi_read(void)

{

  SPI1->DR = 0x00;                // Write data to be transmitted to the SPI data register

  while (!(SPI1->SR & (SPI_I2S_FLAG_TXE)));      // Wait until transmit complete

  while (SPI1->SR & (SPI_I2S_FLAG_BSY));        // Wait until SPI is not busy anymore

  while (!(SPI1->SR & (SPI_I2S_FLAG_RXNE)));      // Wait until receive complete

  return SPI1->DR;                  // Return received data from SPI data register

}