/// <summary>
/// Wrapper for the native <see cref="GpioSerialReadUnmanaged"/>.
/// </summary>
/// <param name="userGpio">The user gpio.</param>
/// <param name="readLength">Length of the read.</param>
/// <returns>The array containing the bytes that were read.</returns>
public static byte[] GpioSerialRead(UserGpio userGpio, int readLength)
{
var buffer = new byte[readLength];
var result = BoardException.ValidateResult(GpioSerialReadUnmanaged(userGpio, buffer, (uint)readLength));
if (result == buffer.Length)
{
return(buffer);
}
var outputBuffer = new byte[result];
Buffer.BlockCopy(buffer, 0, outputBuffer, 0, result);
return(outputBuffer);
}
static void Change(UserGpio pin, LevelChange change, uint time)
{
if (change == LevelChange.LowToHigh)
{
lastHigh = time;
}
else if (change == LevelChange.HighToLow)
{
uint diff = time - lastHigh;
if (diff >= TICKS_MIN_DCC_ONE && diff <= TICKS_MAX_DCC_ONE)
{
AddDidget(true);
}
else if (diff >= TICKS_MIN_DCC_ZERO && diff <= TICKS_MAX_DCC_ZERO)
{
AddDidget(false);
}
}
}
/// <summary>
/// This function configures the level logic for bit bang serial reads.
///
/// Use PI_BB_SER_INVERT to invert the serial logic and PI_BB_SER_NORMAL for
/// normal logic. Default is PI_BB_SER_NORMAL.
///
/// The GPIO must be opened for bit bang reading of serial data using
/// <see cref="GpioSerialReadOpen"/> prior to calling this function.
/// </summary>
/// <param name="userGpio">0-31.</param>
/// <param name="invert">0-1.</param>
/// <returns>Returns 0 if OK, otherwise PI_BAD_USER_GPIO, PI_GPIO_IN_USE, PI_NOT_SERIAL_GPIO, or PI_BAD_SER_INVERT.</returns>
public static ResultCode GpioSerialReadInvert(UserGpio userGpio, bool invert)
{
return(GpioSerialReadInvertUnmanaged(userGpio, invert ? DigitalValue.True : DigitalValue.False));
}
public static extern ResultCode GpioNoiseFilter(UserGpio userGpio, uint steadyMicroseconds, uint activeMicroseconds);
public static extern ResultCode GpioSetWatchdog(UserGpio userGpio, uint timeoutMilliseconds);
public static extern ResultCode GpioSetAlertFunc(UserGpio userGpio, [In, MarshalAs(UnmanagedType.FunctionPtr)] PiGpioAlertDelegate callback);
public static extern int BbSPIXfer(UserGpio csPin, [In, MarshalAs(UnmanagedType.LPArray)] byte[] inputBuffer, [In, MarshalAs(UnmanagedType.LPArray)] byte[] outputBuffer, uint count);
public static extern ResultCode BbSPIOpen(UserGpio csPin, UserGpio misoPin, UserGpio mosiPin, UserGpio clockPin, uint baudRate, SoftSpiFlags spiFlags);
/// <summary>
/// Gets the PWM duty cycle.
/// </summary>
/// <param name="userGpio">The user gpio.</param>
/// <returns>The PWM duty cycle</returns>
public static int GpioGetPwmDutyCycle(UserGpio userGpio)
{
return(BoardException.ValidateResult(GpioGetPwmDutyCycleUnmanaged(userGpio)));
}
public static extern int BbI2CZip(UserGpio sdaPin, [In, MarshalAs(UnmanagedType.LPArray)] byte[] inputBuffer, uint inputLength, [In, MarshalAs(UnmanagedType.LPArray)] byte[] outputBuffer, uint outputLength);
public static extern ResultCode BbI2CClose(UserGpio sdaPin);
public static extern ResultCode BbI2COpen(UserGpio sdaPin, UserGpio sclPin, uint baudRate);
public static extern int GpioWaveAddSerial(UserGpio userGpio, uint baudRate, uint dataBits, uint stopBits, uint offset, uint numBytes, [In, MarshalAs(UnmanagedType.LPArray)] byte[] str);
public static extern ResultCode GpioSerialReadClose(UserGpio userGpio);
/// <summary>
/// Wrapper for the native <see cref="GpioSerialReadUnmanaged"/>.
/// </summary>
/// <param name="userGpio">The user gpio.</param>
/// <param name="buffer">The buffer.</param>
/// <param name="readLength">Length of the read.</param>
/// <returns>The amount of bytes read.</returns>
public static int GpioSerialRead(UserGpio userGpio, byte[] buffer, int readLength)
{
var result = BoardException.ValidateResult(GpioSerialReadUnmanaged(userGpio, buffer, (uint)readLength));
return(result);
}
public static extern ResultCode GpioPwm(UserGpio userGpio, uint dutyCycle);
private static extern int GpioGetPwmRealRangeUnmanaged(UserGpio userGpio);
/// <summary>
/// Returns 0 (off), 500 (most anti-clockwise) to 2500 (most clockwise)
/// </summary>
/// <param name="userGpio">The user gpio.</param>
/// <returns>The Servo pulse width</returns>
public static int GpioGetServoPulseWidth(UserGpio userGpio)
{
return(BoardException.ValidateResult(GpioGetServoPulseWidthUnmanaged(userGpio)));
}
public static extern ResultCode GpioServo(UserGpio userGpio, uint pulseWidth);
public static extern ResultCode GpioSetPwmRange(UserGpio userGpio, uint range);
public static extern ResultCode BbSPIClose(UserGpio csPin);
public static extern int GpioGetPwmRange(UserGpio userGpio);
/// <summary>
/// This function sends a trigger pulse to a GPIO. The GPIO is set to
/// level for pulseLen microseconds and then reset to not level.
///
/// or PI_BAD_PULSELEN.
/// </summary>
/// <param name="userGpio">0-31.</param>
/// <param name="pulseLength">1-100.</param>
/// <param name="value">0,1.</param>
/// <returns>Returns 0 if OK, otherwise PI_BAD_USER_GPIO, PI_BAD_LEVEL, or PI_BAD_PULSELEN.</returns>
public static ResultCode GpioTrigger(UserGpio userGpio, uint pulseLength, bool value)
{
return(GpioTriggerUnmanaged(userGpio, pulseLength, value ? DigitalValue.True : DigitalValue.False));
}
public static extern ResultCode GpioSetPwmFrequency(UserGpio userGpio, uint frequency);
public static extern ResultCode GpioSetAlertFuncEx(UserGpio userGpio, [In, MarshalAs(UnmanagedType.FunctionPtr)] PiGpioAlertExDelegate callback, UIntPtr userData);
public static extern int GpioGetPwmFrequency(UserGpio userGpio);
public static extern ResultCode GpioGlitchFilter(UserGpio userGpio, uint steadyMicroseconds);
private static extern int GpioGetServoPulseWidthUnmanaged(UserGpio userGpio);
private static extern ResultCode GpioTriggerUnmanaged(UserGpio userGpio, uint pulseLength, DigitalValue value);
private static extern int GpioGetPwmDutyCycleUnmanaged(UserGpio userGpio);