public bool ReadPin(int number)
{
Write(I2CcommandBuilder.ReadGPIOCommand());
byte[] rval = new byte[(int)I2CCommands.MAX];
var err = reader.Read(rval, 0, rval.Length, I2CTimeout, out int transferLength);
if (err != ErrorCode.Ok || transferLength != 1)
{
throw new ReadException(err);
}
return((rval[0] & (1 << number)) != 0);
}
/// <summary>
/// Read single byte from slave, send NAK
/// </summary>
/// <returns>Byte from slave</returns>
public byte ReadByteNak()
{
byte[] r = new byte[1];
var read_command = I2CcommandBuilder.ReadCommandNAK();
Write(read_command);
var err = reader.Read(r, 0, 1, I2CTimeout, out int transferLength);
if (err != ErrorCode.Ok || transferLength != 1)
{
throw new ReadException(err);
}
return(r[0]);
}
/// <summary>
/// Use the single byte write style to get an ack bit from writing to an address with no commands.
/// </summary>
/// <returns></returns>
public bool I2C_Detect(int i2c_addr)
{
Write(I2CcommandBuilder.DetectCommand(i2c_addr));
return(IsAck());
}
/// <summary>
/// Write a byte and return the ack bit
/// </summary>
/// <param name="bb">byte to write</param>
/// <returns>true for ack, false for nak</returns>
public bool WriteByteCheckAck(byte bb)
{
Write(I2CcommandBuilder.WriteByteCommand(bb));
return(IsAck());
}
/// <summary>
/// Set the i2c speed desired
/// </summary>
/// <param name="speed_khz">speed: in khz, will round down to 20, 100, 400, 750
/// 750 is closer to 1000 for bytes, but slower around acks and each byte start.
/// </param>
public void SetSpeed(uint speed_khz = 100)
{
var command = I2CcommandBuilder.SetSpeedCommand(speed_khz);
Write(command);
}