ADS1256用cubeMX生成项目，用SPI2读出数据错误？

只看该作者 · 2021-5-20 09:56

已软件模拟，一切正常。
//ADS1256读寄存器
u8 ADS1256_Read_Reg(u8 reg)
{
  u8 status;
  while(GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_7)){;}//wait ready
  reg=reg|0x10;
      ADS1256_Write_Bits(reg);
  ADS1256_Write_Bits(0x0);
      delayus(10);       //????? T6 时间调整6.5us
      status=ADS1256_Read_Bits();
      return status;
}
//ADS1256读寄存器
void ADS1256_Write_Reg( u8 reg, u8 senddata)
{
  while(GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_7)){;}//wait ready
      reg=reg|0x50;
      ADS1256_Write_Bits(reg);
  ADS1256_Write_Bits(0x0);
      ADS1256_Write_Bits(senddata);
}

HAL库
uint8_t ADS1256_Read_Reg(uint8_t reg)
{
  uint8_t status=0xff;
      uint8_t databuffer[2];
  while(ADS1256_Read_Ready){;}//wait ready
  reg=reg|0x10;
      databuffer[0]=reg;databuffer[1]=0;
      if(HAL_SPI_Transmit(&hspi2,&databuffer[0],1,1000)!=HAL_OK) {Error_Handler();}
      if(HAL_SPI_Transmit(&hspi2,&databuffer[1],1,1000)!=HAL_OK) {Error_Handler();}
      delayus(20);       //????? T6 时间调整6.5us
      if(HAL_SPI_TransmitReceive(&hspi2,&status,&databuffer[0],1,1000)!=HAL_OK) {Error_Handler();}
      return databuffer[0];
}
//ADS1256写寄存器
void ADS1256_Write_Reg( uint8_t reg, uint8_t senddata)
{
  uint8_t databuffer[3];
  while(ADS1256_Read_Ready){;}//wait ready
      reg=reg|0x50;
      databuffer[0]=reg;databuffer[1]=0;databuffer[2]=senddata;
      if(HAL_SPI_Transmit(&hspi2,&databuffer[0],1,1000)!=HAL_OK) {Error_Handler();}
      if(HAL_SPI_Transmit(&hspi2,&databuffer[1],1,1000)!=HAL_OK) {Error_Handler();}
      if(HAL_SPI_Transmit(&hspi2,&databuffer[2],1,1000)!=HAL_OK) {Error_Handler();}
}

HAL库测试
//ADS1256_Init();
      ADS1256_Write_CS_L;
      delayms(100);

      ADS1256_Write_Reg(0x01,0x01);//状态寄存器初始化
      delayus(20);
      rbuffer[0]=0;
      rbuffer[0]=ADS1256_Read_Reg(0x01);//模拟多路选择器初始化
      delayus(20);

向01寄存器写入1，再读出，数据不对
配置
hspi2.Instance = SPI2;
  hspi2.Init.Mode = SPI_MODE_MASTER;
  hspi2.Init.Direction = SPI_DIRECTION_2LINES;
  hspi2.Init.DataSize = SPI_DATASIZE_8Bit;
  hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;
  hspi2.Init.CLKPhase = SPI_PHASE_2EDGE;
  hspi2.Init.NSS = SPI_NSS_SOFT;
  hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
  hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi2.Init.CRCPolynomial = 10;
  if (HAL_SPI_Init(&hspi2) != HAL_OK)
  {
Error_Handler();
  }