public static void Main()
{
sid = new MOS6581(Pins.GPIO_PIN_D10, Pins.GPIO_PIN_D9);
_usb = new UsbPort("COM4", 250000, _ProcessPacket);
//Timer usbstatusreport = new Timer(new TimerCallback(_usb.SendPacket), null, 1000, 700);
sid.reset();
sid.volume(15); // set volume to the maximum, 15.
sid.setMode(0, SID_TRIANGLE); //set voice 0 to a ramp waveform
sid.setADEnvelope(0, 0, 0); //Set voice 0's Attack and Decay envelope
sid.setSREnvelope(0, 15, 0); //Set voice 0's Sustain and Release envelope
sid.setFrequency(0, A[4]);
sid.setVoice(0, true); //Set voice 0 to 'on'.
// sid.setVoice(2, true);
// sid.setVoice(3, true);
while (true)
{
Thread.Sleep(900);
_usb.SendPacket();
}
}
static void _ProcessPacket(object sender, SerialDataReceivedEventArgs a)
{
//long startTime = Microsoft.SPOT.Hardware.Utility.GetMachineTime().Ticks;
byte[] inBuf = null;
int available;
do
{
available = _usb._serial.BytesToRead;
} while (available < 14); //wait for all bytes before operating on data
inBuf = new byte[14];
_usb._serial.Read(inBuf, 0, inBuf.Length);
string Packet = new string(System.Text.Encoding.UTF8.GetChars(inBuf));
// Debug.Print(Packet);
int RemoteChecksum = Int16.Parse(Packet.Substring(11, 3)); //extract sender's checksum
int LocalChecksum = 0;
string data = Packet.Substring(3, 8);
for (int i = 3; i < 11; i++)
{
LocalChecksum += Packet[i];
}
//compute our checksum
LocalChecksum %= 1000;
if (RemoteChecksum != LocalChecksum)
{
return; //stop packet processing if checksums don't match
}
string packetType = Packet.Substring(0, 3);
if (packetType == "$$$") //do SID Protocol
{
//Debug.Print(Packet);
string command = data.Substring(0, 3);
string value = data.Substring(3);
switch (command)
{
case "ENV": //set voice envelope
{
int voice = GetHex(value[0]);
int attack = GetHex(value[1]);
int decay = GetHex(value[2]);
int sustain = GetHex(value[3]);
int release = GetHex(value[4]);
sid.setADEnvelope(voice, attack, decay);
sid.setSREnvelope(voice, sustain, release);
break;
}
case "VFQ": //voice frequency
{
int voice = GetHex(value[0]);
int freq = Convert.ToInt32(value.Substring(1), 16);
sid.setFrequency(voice, freq);
break;
}
case "VPW": //voice puslewidth
{
int voice = GetHex(value[0]);
int pw = Convert.ToInt32(value.Substring(1), 16);
sid.setPulseWidth(voice, pw);
break;
}
case "FFQ": //filter frequency
{
int freq = Convert.ToInt32(value, 16);
sid.filterFrequency(freq);
break;
}
case "FRS": //filter resonance
{
int res = Convert.ToInt32(value, 16);
break;
}
case "VFL": //voice filter mode
{
int voice = GetHex(value[0]);
bool on = value[4] == '1' ? true : false;
sid.setFilterVoice(voice, on);
break;
}
case "TRG": //voice enable: on/off
{
int voice = GetHex(value[0]);
bool on = value[4] == '1' ? true : false;
sid.setVoice(voice, on);
break;
}
case "VWF": //voice waveform
{
int voice = GetHex(value[0]);
int _waveform = GetHex(value[4]);
int waveform = 1 << (4 + _waveform);
sid.setMode(voice, waveform);
break;
}
case "AMP": //set volume
{
int volume = GetHex(value[4]);
sid.volume(volume);
break;
}
case "FMO": //filter mode (bp, hp, lp)
{
int mode = GetHex(value[4]);
sid.setFilterMode(1 << mode);
break;
}
}
}
#region boring
else if (packetType == "###") //do Mayes Protocol
{
_usb.D0.Write(data[0] == '1' ? true : false);
_usb.D1.Write(data[1] == '1' ? true : false);
_usb.D2.Write(data[2] == '1' ? true : false);
_usb.D3.Write(data[3] == '1' ? true : false);
_usb.D4.Write(data[4] == '1' ? true : false);
_usb.D5.Write(data[5] == '1' ? true : false);
_usb.D6.Write(data[6] == '1' ? true : false);
_usb.D7.Write(data[7] == '1' ? true : false);
}
#endregion
// long endTime = Microsoft.SPOT.Hardware.Utility.GetMachineTime().Ticks;
//Debug.Print((endTime - startTime).ToString());
}
