stm32407 SPI1配置不成功,一直卡在查询标志位

yyp123456 · 发表于 2020-4-18 09:22:15

各位大神，stm32f407 SPI1 初始化一起不成功，用开发板的例程，程序一直卡在while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)
  GPIO_InitTypeDef  GPIO_InitStructure;
  SPI_InitTypeDef  SPI_InitStructure;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
  RCC_AHB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_5|GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_PinAFConfig(GPIOA,GPIO_PinSource5,GPIO_AF_SPI1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_SPI1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_SPI1);

//ÕaàïÖ»Õë¶ÔSPI¿ú3õê¼»ˉ
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,DISABLE);

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_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);

SPI_Cmd(SPI1, ENABLE);

SPI1_ReadWriteByte(0xff);

u8 SPI2_ReadWriteByte(u8 TxData)
{
u16  retry =0;
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)
{};

SPI_I2S_SendData(SPI1, TxData); //í¨1yíaéèSPIx·￠Ëíò»¸öbyte  êy¾Y

   retry =0;
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET)
{};

return SPI_I2S_ReceiveData(SPI1);

}