public void Enable()
{
lock (IOWarrior.SyncObject)
{
if (IOWarrior is IOWarrior56 && ((IOWarrior as IOWarrior56).PWM as PWMInterfaceImplementation).SelectedChannels == PWMConfig.PWM_1To2)
{
throw new InvalidOperationException("SPI cannot be used while PWM_2 is enabled.");
}
var report = IOWarrior.NewReport(Pipe.SPECIAL_MODE);
report[0] = ReportId.SPI_SETUP;
report[1] = 0x01; // Enable
if (IOWarrior.Type == IOWarriorType.IOWarrior56)
{
// SPI Mode 0, msb first
report[2] = 0x00;
// Clock -> 8 MHz
report[3] = 0x02;
}
if (IOWarrior.Type == IOWarriorType.IOWarrior24)
{
// SPI Mode 0, msb first, 1MBit/sec
report[2] = 0x05;
}
IOWarrior.WriteReport(report, Pipe.SPECIAL_MODE);
Enabled = true;
}
}
public byte[] ReadBytes(byte address, int length)
{
lock (IOWarrior.SyncObject)
{
if (!Enabled)
{
throw new InvalidOperationException("I2C is not enabled.");
}
if (address.GetBit(7))
{
throw new ArgumentException("Illegal I2C Address: " + string.Format("0x{0:X2}", address));
}
if (length > I2CPacketLength || length < 0)
{
throw new ArgumentException("Data length must be between 0 and " + I2CPacketLength + ".");
}
var report = IOWarrior.NewReport(I2CPipe);
report[0] = ReportId.I2C_READ;
report[1] = (byte)length; // Amount of bytes to read
// Write address byte
report[2] = (byte)(address << 1);
report[2].SetBit(0, true); // true -> read
IOWarrior.WriteReport(report, I2CPipe);
var result = IOWarrior.ReadReport(I2CPipe);
if (result[0] != ReportId.I2C_READ)
{
if (Debugger.IsAttached)
{
Debugger.Break();
}
throw new InvalidOperationException("Recieved wrong packet!");
}
if (result[1].GetBit(7))
{
throw new IOException("Error while reading data.");
}
if (IOWarrior.Type == IOWarriorType.IOWarrior56 && result[1].GetBit(6))
{
throw new IOException("Error while reading data, arbitration lost.");
}
return(result.Skip(2).Take(length).ToArray());
}
}
public void Enable()
{
lock (IOWarrior.SyncObject)
{
var report = IOWarrior.NewReport(I2CPipe);
report[0] = ReportId.I2C_SETUP;
report[1] = 0x01; // Enable
IOWarrior.WriteReport(report, I2CPipe);
Enabled = true;
}
}
public void Disable()
{
lock (IOWarrior.SyncObject)
{
if (!Enabled)
{
return;
}
var report = IOWarrior.NewReport(I2CPipe);
report[0] = ReportId.I2C_SETUP;
report[1] = 0x00; // Disable
IOWarrior.WriteReport(report, I2CPipe);
Enabled = false;
}
}
public void Disable()
{
lock (IOWarrior.SyncObject)
{
if (!Enabled)
{
return;
}
var report = IOWarrior.NewReport(Pipe.SPECIAL_MODE);
report[0] = ReportId.SPI_SETUP;
report[1] = 0x00; // Disable
IOWarrior.WriteReport(report, Pipe.SPECIAL_MODE);
Enabled = false;
}
}
public void WriteBytes(byte address, params byte[] data)
{
lock (IOWarrior.SyncObject)
{
if (!Enabled)
{
throw new InvalidOperationException("I2C interface is not enabled.");
}
if (address.GetBit(7))
{
throw new ArgumentException("Illegal I2C Address: " + string.Format("0x{0:X2}", address));
}
if (data.Length > (I2CPacketLength - 1))
{
throw new ArgumentException("Data length must be between 0 and " + (I2CPacketLength - 1) + ".");
}
var report = IOWarrior.NewReport(I2CPipe);
report[0] = ReportId.I2C_WRITE;
// Write IOW I2C settings
report[1] = (byte)(1 + data.Length);
report[1].SetBit(7, true); // Enable start bit
report[1].SetBit(6, true); // Enable stop bit
// Write address byte
report[2] = (byte)(address << 1);
report[2].SetBit(0, false); // false -> write
// Write data bytes
for (int index = 0; index < data.Length; index++)
{
report[3 + index] = data[index];
}
IOWarrior.WriteReport(report, I2CPipe);
var result = IOWarrior.ReadReport(I2CPipe);
if (result[0] != ReportId.I2C_WRITE)
{
if (Debugger.IsAttached)
{
Debugger.Break();
}
throw new InvalidOperationException("Recieved wrong packet!");
}
if (result[1].GetBit(7))
{
throw new IOException("Error while writing data.");
}
if (IOWarrior.Type == IOWarriorType.IOWarrior56 || IOWarrior.Type == IOWarriorType.IOWarrior28)
{
if (result[1].GetBit(6))
{
throw new IOException("Error while writing data, arbitration lost.");
}
}
}
}
public byte[] TransferBytes(params byte[] data)
{
lock (IOWarrior.SyncObject)
{
if (!Enabled)
{
throw new InvalidOperationException("SPI interface is not enabled.");
}
if (data.Length < 1 || data.Length > SPIPacketLength)
{
throw new ArgumentException("Data length must be between 1 and " + SPIPacketLength + ".");
}
var report = IOWarrior.NewReport(Pipe.SPECIAL_MODE);
report[0] = ReportId.SPI_TRANSFER;
if (IOWarrior.Type == IOWarriorType.IOWarrior56)
{
// Count
report[1] = (byte)data.Length;
// Flags -> no DRDY, SS stays not active
report[2] = 0x00;
// Write data bytes
for (int index = 0; index < data.Length; index++)
{
report[3 + index] = data[index];
}
}
if (IOWarrior.Type == IOWarriorType.IOWarrior24)
{
// Count & Flags -> no DRDY, SS stays not acive
report[1] = (byte)data.Length;
// Write data bytes
for (int index = 0; index < data.Length; index++)
{
report[2 + index] = data[index];
}
}
IOWarrior.WriteReport(report, Pipe.SPECIAL_MODE);
var result = IOWarrior.ReadReport(Pipe.SPECIAL_MODE);
if (result[0] != ReportId.SPI_TRANSFER)
{
if (Debugger.IsAttached)
{
Debugger.Break();
}
throw new InvalidOperationException("Recieved wrong packet!");
}
return(result.Skip(2).Take(result[1]).ToArray());
}
}