Read temperature from RPI2 on Windows 10 IoT with MAX31865 failled

Question

Hello,
I am trying to read the temperature on a PI2 with Windows 10 IoT but I always have 0 as returned value for MAX31865_CONFIG_REG or MAX31865_RTDMSB_REG

The sample in python works fine with Raspian
https://learn.adafruit.com/adafruit-max31865-rtd-pt100-amplifier/python-circuitpython

I tryed with .Net5 and UWP but I have the same result

Did someone already succeed in reading the temperature ?
Could you share your experience please ?

Thank you for your help

Romain

Answer 1

My bad

I forgot to controle the CS pin

        controller = GpioController.GetDefault();
        var cs = controller.OpenPin(5, GpioSharingMode.Exclusive);
        cs.SetDriveMode(GpioPinDriveMode.Output);
        cs.Write(GpioPinValue.High);


    public void writeRegister8(byte addr, byte data)
    {
        cs.Write(GpioPinValue.Low);

        Console.WriteLine($"Write at adress {addr}: {data}");

        addr |= 0x80; // make sure top bit is set
        addr &= 0xFF;

        byte[] buffer = { addr, data };
        spi_dev.Write(buffer);

        cs.Write(GpioPinValue.High);
    }