public override void Write(byte[] buffer, int offset, int count)
{
if (handle < 0)
{
return;
}
byte[] txBuf = new byte[count];
for (int i = 0; i < txBuf.Length; i++)
{
txBuf[i] = buffer[offset + i];
}
rxBuf = new byte[count];
//Console.Write("txBuf[{0}]: ", txBuf.Length);
//for (int i = 0; i < txBuf.Length; i++)
//{
// Console.Write(" {0:x2}", txBuf[i]);
//}
//Console.WriteLine("\r\n");
pigpiodIf.spi_xfer((UInt32)handle, txBuf, rxBuf);
//Console.Write("rxBuf[{0}]: ", rxBuf.Length);
//for (int i = 0; i < rxBuf.Length; i++)
//{
// Console.Write(" {0:x2}", rxBuf[i]);
//}
//Console.WriteLine("\r\n");
}
public void tc(PigpiodIf pigpiodIf, CancellationToken ct)
{
int h, x, b, e;
byte[] buf = new byte[128];
Console.WriteLine("\r\nSPI tests.");
/* this test requires a MCP3202 on SPI1 channel 2 */
h = pigpiodIf.spi_open(2, 50000, 256 + 0);
CHECK(12, 1, h, 0, 0, "spi open", ct);
for (x = 0; x < 5; x++)
{
buf = new byte[] { 0x01, 0x80, 0x00 };
b = pigpiodIf.spi_xfer((UInt32)h, buf, buf);
CHECK(12, 2, b, 3, 0, "spi xfer", ct);
if (b == 3)
{
pigpiodIf.time_sleep(1.0);
Console.WriteLine("{0} ", ((buf[1] & 0x0F) * 256) | buf[2]);
}
}
e = pigpiodIf.spi_close((UInt32)h);
CHECK(12, 99, e, 0, 0, "spi close", ct);
}
private async void buttonRollStart_Click(object sender, EventArgs e)
{
buttonRollStart.Enabled = false;
buttonFastStart.Enabled = false;
buttonRollStop.Enabled = true;
int h = -1;
try
{
rollCts = new CancellationTokenSource();
var ct = rollCts.Token;
await Task.Run(() =>
{
h = pigpiodIf.spi_open(2, 1000000, 256 + 0);
if (h < 0)
{
throw new PigpiodIfException(h, "PigpiodIf: " + pigpiodIf.pigpio_error(h));
}
for (int ch = 0; ch < NUM_ROLL_CHANNELS; ch++)
{
rollSeries[ch].Points.Clear();
}
DateTime start = DateTime.Now;
while (!ct.IsCancellationRequested)
{
double[] volts = new double[NUM_ROLL_CHANNELS];
DataPoint[] dataPoints = new DataPoint[NUM_ROLL_CHANNELS];
for (int ch = 0; ch < NUM_ROLL_CHANNELS; ch++)
{
byte[] buf = new byte[] { (byte)(0x06 + (ch >> 2)), (byte)(ch << 6), 0x00 };
int b = pigpiodIf.spi_xfer((UInt32)h, buf, buf);
if (b == 3)
{
TimeSpan ts = DateTime.Now - start;
double volt = 3.3 * (((buf[1] & 0x0f) * 256) + buf[2]) / 4096.0;
volts[ch] = volt;
dataPoints[ch] = new DataPoint(ts.TotalSeconds, volt);
}
}
string s = volts[0].ToString("0.0");
for (int ch = 1; ch < NUM_ROLL_CHANNELS; ch++)
{
s += string.Format(", {0:0.0}", volts[ch]);
}
Console.WriteLine("{0}", s);
Invoke(new Action(() =>
{
for (int ch = 0; ch < NUM_ROLL_CHANNELS; ch++)
{
if (rollSeries[ch].Points.Count >= NUM_ROLL_SAMPLES)
{
rollSeries[ch].Points.RemoveAt(0);
}
rollSeries[ch].Points.Add(dataPoints[ch]);
}
rollPlotModel.InvalidatePlot(true);
if (plotView1.Model != rollPlotModel)
{
plotView1.Model = rollPlotModel;
}
else
{
plotView1.Invalidate();
}
}));
}
}, ct);
}
catch (OperationCanceledException)
{
// nothing to do
}
catch (PigpiodIfException ex)
{
Console.WriteLine(ex.Message);
}
finally
{
if (h >= 0)
{
pigpiodIf.spi_close((UInt32)h);
}
rollCts = null;
buttonRollStart.Enabled = true;
buttonFastStart.Enabled = true;
buttonRollStop.Enabled = false;
}
}