/// <summary>
/// Writes a data buffer then reads a data buffer from the I2C device.
/// </summary>
/// <param name="writeBuffer">Write buffer.</param>
/// <param name="writeOffset">Offset into the write buffer.</param>
/// <param name="writeLength">Number of bytes to write.</param>
/// <param name="readBuffer">Read buffer.</param>
/// <param name="readOffset">Offset into the read buffer.</param>
/// <param name="readLength">Number of bytes to read.</param>
/// <param name="numWritten">Number of bytes written successfully.</param>
/// <param name="numRead">Number of bytes read successfully.</param>
/// <returns><c>true</c> if all the required bytes are written and read successfully.</returns>
public bool WriteRead(byte[] writeBuffer, int writeOffset, int writeLength, byte[] readBuffer, int readOffset, int readLength, out int numWritten, out int numRead)
{
lock (bus)
{
if (bus.disposed)
{
throw new ObjectDisposedException();
}
return(SoftwareI2CBus.NativeI2CWriteRead((int)bus.clockPin, (int)bus.dataPin, clockRateKHz, address, writeBuffer, writeOffset, writeLength, readBuffer, readOffset, readLength, out numWritten, out numRead));
}
}
static public void Disable()
{
if (i2cbus != null && i2cdev != null)
{
WriteToRegister(0x2A, 0);//bit 0 is 0 - standby
isActived = false;
i2cdev = null;
i2cbus.Dispose();
i2cbus = null;
}
}
/// <summary>
/// Disables the accelerometer to save power.
/// </summary>
public static void Disable()
{
if (!Accelerometer.IsEnabled)
return;
Accelerometer.WriteToRegister(0x2A, 0);
Accelerometer.I2CDevice = null;
Accelerometer.I2CBus.Dispose();
Accelerometer.I2CBus = null;
Accelerometer.Enabled = false;
}
/// <summary>
/// Enables the accelerometer functionality if it was disabled.
/// </summary>
public static void Enable()
{
if (Accelerometer.IsEnabled)
return;
Accelerometer.I2CBus = new SoftwareI2CBus(Accelerometer.I2C_CLK, Accelerometer.I2C_DATA);
Accelerometer.I2CDevice = Accelerometer.I2CBus.CreateI2CDevice(Accelerometer.I2C_ADDRESS, 400);
//bit 0 is 1 - active
//bit 0 is 0 - standby
//bit 1 = 1: 8 bit accurate - fast mode read
//bit 1 = 0: 10 bit accurate - normal mode read
WriteToRegister(0x2A, 1);
Accelerometer.Enabled = true;
}
//const String TEXT_EXCEPTION_00 = "Accelerometer needs to be enable by calling Enable() function";
static public void Enable()
{
if (i2cbus == null)
{
i2cbus = new SoftwareI2CBus(i2c_clk, i2c_dat);
}
if (i2cdev == null)
{
i2cdev = i2cbus.CreateI2CDevice(0x1C, 400);
}
//bit 0 is 1 - active
//bit 0 is 0 - standby
//bit 1 = 1: 8 bit accurate - fast mode read
//bit 1 = 0: 10 bit accurate - normal mode read
isActived = true;
WriteToRegister(0x2A, 1); //bit 0 is 1 - active
}
internal I2CDevice(SoftwareI2CBus bus, ushort address, int clockRateKHz)
{
this.bus = bus;
this.address = address;
this.clockRateKHz = clockRateKHz;
}
internal I2CDevice(SoftwareI2CBus bus, ushort address, int clockRateKHz)
{
this.bus = bus;
this.address = address;
this.clockRateKHz = clockRateKHz;
}
