Ejemplo n.º 1
0
 public void Dispose()
 {
     if (_deviceHandle >= 0)
     {
         LibcWrapper.Close(_deviceHandle);
     }
 }
Ejemplo n.º 2
0
        /// <summary>
        /// Writes to I2C
        /// </summary>
        /// <param name="data">data to write to I2C</param>
        /// <param name="length">nr of bytes to write</param>
        public void Write(byte[] data, int length)
        {
            if (length < 1 || length > maxBufferLength)
            {
                throw new Exception("Length is out of bounds");
            }

            var writeOp = LibcWrapper.Write(_deviceHandle, data, length);

            if (writeOp != length)
            {
                throw new Exception($"Write error. Returned: {writeOp}, expected: {length}");
            }
        }
Ejemplo n.º 3
0
        /// <summary>
        /// Initializes I2C device
        /// </summary>
        /// <param name="devicePath">path to I2C device. Like "/dev/i2c-1"</param>
        /// <param name="deviceAddress">I2C address. Like "0x48"</param>
        public I2CDevice(string devicePath, int deviceAddress)
        {
            _deviceHandle = LibcWrapper.Open(devicePath, (int)LibcConstants.OpenFileMode.O_RDWR);
            if (_deviceHandle < 0)
            {
                throw new Exception($"Can't open '{devicePath}'. Returned {_deviceHandle}");
            }

            var deviceReturnCode = LibcWrapper.Ioctl(_deviceHandle, (int)LibcConstants.I2CMode.I2C_SLAVE, deviceAddress);

            if (deviceReturnCode < 0)
            {
                throw new Exception($"Can't set I2C address. Returned {deviceReturnCode}");
            }
        }
Ejemplo n.º 4
0
        /// <summary>
        /// Reads from I2C
        /// </summary>
        /// <param name="length">nr of bytes to read</param>
        /// <returns></returns>
        public byte[] Read(int length)
        {
            if (length < 1 || length > maxBufferLength)
            {
                throw new Exception("Length is out of bounds");
            }

            byte[] result = new byte[length];
            var    readOp = LibcWrapper.Read(_deviceHandle, result, length);

            if (readOp != length)
            {
                throw new Exception($"Read error. Returned: {readOp}, expected: {length}");
            }

            return(result);
        }