stm8s005 SPI通信att7053BU

Jerry123456 · 发表于 2019-6-1 16:30:11

硬件SPI读寄存器值，请问这读函数有问题吗

uint8_t WriteByte(uint8_t Data)
{
  while(SPI_GetFlagStatus(SPI_FLAG_TXE) == RESET){ }
  SPI_SendData(Data);
  while(SPI_GetFlagStatus(SPI_FLAG_RXNE) == RESET){ }
  return SPI_ReceiveData();
}

uint8_t ReadByte(void)
{
  while (SPI_GetFlagStatus(SPI_FLAG_TXE) == RESET){}
  SPI_SendData(0xff);
  while(SPI_GetFlagStatus(SPI_FLAG_BSY) == SET){}
  while (SPI_GetFlagStatus(SPI_FLAG_RXNE) == RESET) { }
  return SPI_ReceiveData();
}

void Read_ID(uint8_t address)
{
uint8_t r1,r2,r3;
GPIO_WriteLow(GPIOE, GPIO_PIN_5);
WriteByte(address);
r1 = ReadByte();
r2 = ReadByte();
r3 =  ReadByte();

  printf("\n\r Read = %x %x %x \n\r",r1,r2,r3); //53
  GPIO_WriteHigh(GPIOE, GPIO_PIN_5);
}