SPI Magnetic sensor reads value correctly only once, after spi begin

[RaphZufferey]

Hi! Thank you for the fantastic library, it is proving to be of great help! I am running into an issue trying to read an SPI sensor. Sensor gets declared as instructed:

  MagneticSensorSPI sensor = MagneticSensorSPI(PA15, 14, 0x3FFF);
  SPIClass SPI_3(PB5, PB4, PB3); //(mosi, miso, sclk)

Then initialized (sensor.init(&SPI_3);) in the setup loop. I am reading the sensor in the main loop just like in the example: Serial.print((float)sensor.getSensorAngle()); Serial.print("\t");

The issue: the sensor returns the correct value only once. On subsequent calls, it returns the same value as before. I managed to circumvent this issue by adding spi->begin(); in the library, which gets then called every time:

// function reading the raw counter of the magnetic sensor
int MagneticSensorSPI::getRawCount(){
    spi->begin();
    return (int)MagneticSensorSPI::read(angle_register);
}

This is obviously not the correct way of solving this issue, and I was hoping someone could look into this?

• G431B-ESC1
• SPI sensor AS5048a connected on SPI3, thanks to the forum
• Programmed with VSCode and PlatformIO

[runger1101001]

Are you calling sensor.update() during your test? This is called automatically by motor.loopFOC() but if you’re just testing the sensor stand-alone you have to call it yourself.

[RaphZufferey]

Solved, thank you very much!