F103+AD7124-8三线制RTD程序求助

cj0220 · 发表于 2023-2-28 08:57:46

使用F103C8T6控ad7124-8，原理图和手册中三线RTD测量配置一致，AIN0和AIN1各输出250uA，依次写了03、09、19、21、01寄存器，写入与最后读取寄存区都是和配置一样的，外面接了一个150欧电阻，按理应该在5.1K处应该能量到2.5V左右，但目前始终就是0.5V左右，请问是哪里配置出问题？这是SPI初始化，以及配置程序
{

  HAL_Init();
  SystemClock_Config();
  MX_SPI1_Init();
HAL_Delay(500);
//reset
HAL_SPI_Transmit(&hspi1, wrBuf, 8, 1000);
// HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);//CS0
// write[0] = 0x45;
// HAL_SPI_Transmit(&hspi1, write, 1, 1000);
// HAL_SPI_Receive(&hspi1,R_write, 1, 1000);
// HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);//CS1
HAL_Delay(500);

HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);//CS0
HAL_Delay(10);
write[0] = 0x03;
HAL_SPI_Transmit(&hspi1, write, 1, 1000); //写入 io control_1 寄存器
HAL_Delay(10);
write[0] = 0x00;
// write[1] = 0x9B;
write[1] = 0x24;
write[2] = 0x10;
HAL_SPI_Transmit(&hspi1, write, 3, 1000);
HAL_Delay(100);

write[0] = 0x09;
HAL_SPI_Transmit(&hspi1, write, 1, 1000); //写入 channel 0
HAL_Delay(10);
write[0] = 0x80;
write[1] = 0x43;
HAL_SPI_Transmit(&hspi1, write, 2, 1000);
HAL_Delay(100);

write[0] = 0x19;
HAL_SPI_Transmit(&hspi1, write, 1, 1000); //配置寄存器0 CONFIG_0
HAL_Delay(10);
write[0] = 0x09;
write[1] = 0xE5;
HAL_SPI_Transmit(&hspi1, write, 2, 1000);
HAL_Delay(100);

write[0] = 0x21;
HAL_SPI_Transmit(&hspi1, write, 1, 1000); //写入滤波寄存器寄存器，FILTER_0
HAL_Delay(10);
write[0] = 0x06;
write[1] = 0x00;
write[2] = 0x80;
HAL_SPI_Transmit(&hspi1, write, 3, 1000);
HAL_Delay(2000);

write[0] = 0x01;
HAL_SPI_Transmit(&hspi1, write, 1, 1000);
HAL_Delay(100);
// write[0] = 0x0D;
write[0] = 0x05;
// write[1] = 0x81;
write[1] = 0xC3;
HAL_SPI_Transmit(&hspi1, write, 2, 2000);
HAL_Delay(1000);

write[0] = 0x41;
HAL_SPI_Transmit(&hspi1, write, 1, 1000);
HAL_Delay(100);
R_write[0] = 0;
R_write[1] = 0;
HAL_SPI_Receive(&hspi1,R_write, 2, 1000);
HAL_Delay(1000);

void MX_SPI1_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
//  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);
  /*Configure GPIO pin : PtPin */
  GPIO_InitStruct.Pin = GPIO_PIN_4 | GPIO_PIN_3;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* USER CODE END SPI1_Init 1 */
  hspi1.Instance = SPI1;
  hspi1.Init.Mode = SPI_MODE_MASTER;
  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
  hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
  hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
  hspi1.Init.CLKPhase = SPI_PHASE_2EDGE;
  hspi1.Init.NSS = SPI_NSS_SOFT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_128;
  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi1.Init.CRCPolynomial = 7;//10;
  if (HAL_SPI_Init(&hspi1) != HAL_OK)
  {
Error_Handler();
  }
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);
}

void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(spiHandle->Instance==SPI1)
  {
/* SPI1 clock enable */
__HAL_RCC_SPI1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**SPI1 GPIO Configuration
PA5    ------> SPI1_SCK
PA6    ------> SPI1_MISO
PA7    ------> SPI1_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;//GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  }
}