Reading current sensor via SPI (Solved)

[xpp07]

I'm having problems to read my current sensor, which is located at the source leg of a power transistor. 

I'm using the sensor TLI4970

This is my routine every 10ms:

HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET); //Bring slave select low
 
HAL_SPI_Receive(&hspi1, (uint8_t *)&SPIRx, 2, 10); //Receive data
 
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET); //Bring slave select high

However, I get random values even when the current is zero. I'm getting values like:

0x8800

0x8803

0x8801

0xA7FF

0x87FC

0x97FE

0xA802

0xA801

0x97FD

0x87FD

0xA800

0xA7FE

According to the datasheet, these are sensor status messages, but none of them are Sensor Current Messages. The hardware seems okay. This sensor is not so common I think. I haven't found much help. Am I doing something wrong in software?

[xpp07]

This is how my SPI is set:

/* SPI1 init function */
static void MX_SPI1_Init(void)
{
 
  /* SPI1 parameter configuration*/
  hspi1.Instance = SPI1;
  hspi1.Init.Mode = SPI_MODE_MASTER;
  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
  hspi1.Init.DataSize = SPI_DATASIZE_16BIT;
  hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
  hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
  hspi1.Init.NSS = SPI_NSS_SOFT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi1.Init.CRCPolynomial = 7;
  hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
  hspi1.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
  if (HAL_SPI_Init(&hspi1) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }
 
}

[xpp07 · Accepted solution]

Fixed. My clock phase was wrong. I had SP1 mode 0 , but the right one is the Mode 1.

[T J]

great please mark this question as answered, CPOL... CPHA