private static void WriteLEDDriver(I2CConfiguration i2c, uint value)
{
uint byte0 = (0xF0 & value) >> 4;
uint byte1 = (0x0F & value) << 4;
i2c.WriteByte(byte0, byte1);
}
private static void WriteCameraRegister(I2CConfiguration i2c, uint reg, uint value)
{
uint byte0 = value & 0xFF;
uint byte1 = (value >> 8) & 0xFF;
i2c.WriteByte(reg, byte1);
i2c.WriteByte(0xF0, byte0);
}
private static void WriteCameraRegister(I2CConfiguration i2c, uint register, uint value)
{
// ATMega -> Python480 passthrough protocol
var regLow = register & 0xFF;
var regHigh = (register >> 8) & 0xFF;
var valLow = value & 0xFF;
var valHigh = (value >> 8) & 0xFF;
i2c.WriteByte(0x05, regHigh);
i2c.WriteByte(regLow, valHigh);
i2c.WriteByte(valLow, 0x00);
}
protected override IObservable <MiniscopeDataFrame> Process(IObservable <ONIManagedFrame <ushort> > source, ulong frameOffset)
{
// The LED brightnes and binary on/off state are linked in their firmware and so require
// some hackuiness to get the behavior I want.
running = true;
// Turn on EWL
using (var i2c = new I2CConfiguration(DeviceAddress, ID, MAX14574Address))
{
i2c.WriteByte(0x03, 0x03);
}
// Turn on LED
using (var i2c = new I2CConfiguration(DeviceAddress, ID, ATMegaAddress))
{
i2c.WriteByte(1, (uint)(LEDBrightness == 0 ? 0xFF : 0x00));
}
return(source
.SkipWhile(f => (f.Sample[5] & 0x8000) == 0)
.Buffer(Rows)
.Select(block => { return new MiniscopeDataFrame(block, frameOffset, Rows, Columns); })
.Finally(() =>
{
// Turn off EWL
using (var i2c = new I2CConfiguration(DeviceAddress, ID, MAX14574Address))
{
i2c.WriteByte(0x03, 0x00);
}
// Turn off LED
using (var i2c = new I2CConfiguration(DeviceAddress, ID, ATMegaAddress))
{
i2c.WriteByte(1, 0xFF);
}
running = false;
}));
}
private static int ReadCameraRegister(I2CConfiguration i2c, uint reg)
{
return((int)(i2c.ReadByte(reg) << 8 | i2c.ReadByte(0xF0)));
}