public void TemperatureImageTest()
{
I2cTestDevice i2cDevice = new I2cTestDevice();
Amg88xx sensor = new Amg88xx(i2cDevice);
Temperature[,] referenceImage = new Temperature[Amg88xx.Width, Amg88xx.Height];
Random rnd = new Random();
for (int y = 0; y < Amg88xx.Height; y++)
{
for (int x = 0; x < Amg88xx.Width; x++)
{
referenceImage[x, y] = Temperature.FromDegreesCelsius(rnd.Next(-80, 321) * PixelTemperatureResolution);
(byte tl, byte th) = Amg88xxUtils.ConvertFromTemperature(referenceImage[x, y]);
i2cDevice.DataToRead.Enqueue(tl);
i2cDevice.DataToRead.Enqueue(th);
}
}
// read image from sensor
sensor.ReadImage();
// expectation: one write access to register T01L (lower byte of first pixel) to trigger readout
Assert.Single(i2cDevice.DataWritten);
Assert.Equal((byte)Register.T01L, i2cDevice.DataWritten.Dequeue());
// expectation: all pixels have been read, so nothing is remaining
Assert.Empty(i2cDevice.DataToRead);
Assert.Equal(referenceImage, sensor.TemperatureImage);
}
public void ConvertToTemperatureTest(Int16 value, double expected)
{
byte[] valueBuffer = new byte[2];
BinaryPrimitives.WriteInt16LittleEndian(new Span <byte>(valueBuffer), value);
Assert.Equal(expected, Amg88xxUtils.ConvertToTemperature(valueBuffer).DegreesCelsius);
Assert.Equal(expected, Amg88xxUtils.ConvertToTemperature((byte)(value & 0xff), (byte)((value & 0xff00) >> 8)).DegreesCelsius);
}
public void InterruptHysteresisLevelSetTest()
{
Temperature expectedTemperature = Temperature.FromDegreesCelsius(125);
I2cTestDevice i2cDevice = new I2cTestDevice();
Amg88xx sensor = new Amg88xx(i2cDevice);
sensor.InterruptHysteresis = expectedTemperature;
Assert.Equal(4, i2cDevice.DataWritten.Count);
(byte refTl, byte refTh) = Amg88xxUtils.ConvertFromTemperature(expectedTemperature);
Assert.Equal((byte)Register.INTSL, i2cDevice.DataWritten.Dequeue());
Assert.Equal(refTl, i2cDevice.DataWritten.Dequeue());
Assert.Equal((byte)Register.INTSH, i2cDevice.DataWritten.Dequeue());
Assert.Equal(refTh, i2cDevice.DataWritten.Dequeue());
}
public void InterruptHysteresisLevelGetTest()
{
// expected temeperature: 72.75°C
// two's complement representation:
byte expectedTl = 0x23;
byte expectedTh = 0x01;
I2cTestDevice i2cDevice = new I2cTestDevice();
Amg88xx sensor = new Amg88xx(i2cDevice);
i2cDevice.DataToRead.Enqueue(expectedTl);
i2cDevice.DataToRead.Enqueue(expectedTh);
Temperature actualTemperature = sensor.InterruptHysteresis;
Assert.Equal(2, i2cDevice.DataWritten.Count);
Assert.Equal((byte)Register.INTSL, i2cDevice.DataWritten.Dequeue());
Assert.Equal((byte)Register.INTSH, i2cDevice.DataWritten.Dequeue());
Assert.Equal(Amg88xxUtils.ConvertToTemperature(expectedTl, expectedTh).DegreesCelsius, actualTemperature.DegreesCelsius);
}
public void ConvertFromTemperatureTest(double temperature, byte expectedTl, byte expectedTh)
{
(byte tl, byte th) = Amg88xxUtils.ConvertFromTemperature(Temperature.FromDegreesCelsius(temperature));
Assert.Equal(expectedTl, tl);
Assert.Equal(expectedTh, th);
}
