private void SerializeColor(byte b, TransmitterChannel commandList)
{
for (var i = 0; i < 8; ++i)
{
commandList.AddCommand(((b & (1u << 7)) != 0) ? OnePulse : ZeroPulse);
b <<= 1;
}
}
public HCSR04(int TxPin, int RxPin)
{
_txChannel = new TransmitterChannel(TxPin);
_txPulse = new RmtCommand(10, true, 10, false);
_txChannel.AddCommand(_txPulse);
_txChannel.AddCommand(new RmtCommand(20, true, 15, false));
_txChannel.ClockDivider = 80;
_txChannel.CarrierEnabled = false;
_txChannel.IdleLevel = false;
// The received echo pulse width represents the distance to obstacle
// 150us to 38ms
_rxChannel = new ReceiverChannel(RxPin);
_rxChannel.ClockDivider = 80; // 1us clock ( 80Mhz / 80 ) = 1Mhz
_rxChannel.EnableFilter(true, 100); // filter out 100Us / noise
_rxChannel.SetIdleThresold(40000); // 40ms based on 1us clock
_rxChannel.ReceiveTimeout = new TimeSpan(0, 0, 0, 0, 60);
}
public void Config(int TxPin, int RxPin)
{
// Set-up TX & RX channels
// We need to send a 10us pulse to initiate measurement
_txChannel = new TransmitterChannel(TxPin);
_txPulse = new RmtCommand(10, true, 10, false);
_txChannel.AddCommand(_txPulse);
_txChannel.AddCommand(new RmtCommand(20, true, 15, false));
_txChannel.ClockDivider = 80;
_txChannel.CarrierEnabled = false;
_txChannel.IdleLevel = false;
// The received echo pulse width represents the distance to obstacle
// 150us to 38ms for HC-SR04
_rxChannel = new ReceiverChannel(RxPin);
_rxChannel.ClockDivider = 80; // 1us clock ( 80Mhz / 80 ) = 1Mhz
_rxChannel.EnableFilter(true, 100); // filter out 100Us / noise
_rxChannel.SetIdleThresold(40000); // 40ms based on 1us clock
_rxChannel.ReceiveTimeout = new TimeSpan(0, 0, 0, 0, 60);
}
public void Update()
{
using (var commandList = new TransmitterChannel(_gpioPin))
{
ConfigureTransmitter(commandList);
for (uint pixel = 0; pixel < Pixels.Length; ++pixel)
{
SerializeColor(Pixels[pixel].G, commandList);
SerializeColor(Pixels[pixel].R, commandList);
SerializeColor(Pixels[pixel].B, commandList);
}
commandList.AddCommand(ResCommand); // RET
commandList.Send(true);
}
}