protected Task WriteEeprom(byte address, byte[] values, FtI2CTransferOptions options = FtI2CTransferOptions.I2C_TRANSFER_OPTIONS_START_BIT)
{
// Sequence for writing a value:
// 1. Power up device
// 2. Write 0x0000 into the cell of interest
// 3. Wait at least 5ms
// 4. Write the new value
// 5. Wait at least 5ms
// 6. Read back and compare if the write was successful
// 7. Power down (to make sure the changes take place at next power up
return(Task.Run(async() =>
{
var result = Device.Write(Address, new byte[] { address }.Concat(new byte[values.Length].Select(_ => (byte)0)).ToArray(), values.Length + 1, out int transfered, options);
if (result != FtdiMpsseI2CResult.Ok)
{
throw new TempSensorException("Could not write 0 into bus address");
}
await Task.Delay(6);
result = Device.Write(Address, new byte[] { address }.Concat(values).ToArray(), values.Length + 1, out transfered, options);
if (!Device.Ok(result))
{
throw new TempSensorException("Could not set new address");
}
await Task.Delay(6);
var readData = new byte[values.Length];
result = Device.Write(Address, new byte[] { address }, values.Length, out transfered, options);
result = Device.Read(Address, readData, values.Length, out transfered);
if (!Device.Ok(result))
{
throw new TempSensorException("Could not read I2C address");
}
bool isValid = true;
for (int i = 0; i < readData.Length; i++)
{
isValid = isValid && readData[i] == values[0];
}
if (!isValid)
{
throw new TempSensorException("Temperature sensor address was not set successfully");
}
Address = address;
}));
}
public static extern FtResult I2C_DeviceWrite(System.IntPtr handle, int deviceAddress, int sizeToTransfer, byte[] buffer, out int sizeTransfered, FtI2CTransferOptions options);
public static extern FtResult I2C_DeviceWrite(System.IntPtr handle, int deviceAddress, int sizeToTransfer, byte[] buffer, out int sizeTransfered, FtI2CTransferOptions options);
public FtResult Read(byte[] buffer, int sizeToTransfer, out int sizeTransfered, FtI2CTransferOptions options)
{
//EnforceRightConfiguration();
return(LibMpsseI2C.I2C_DeviceRead(_handle, _deviceAddress, sizeToTransfer, buffer, out sizeTransfered, options));
}
public FtResult Write(byte[] buffer, int sizeToTransfer, out int sizeTransfered, FtI2CTransferOptions options)
{
return(LibMpsseI2C.I2C_DeviceWrite(_handle, _deviceAddress, sizeToTransfer, buffer, out sizeTransfered, options));
}
public FtdiMpsseI2CResult Write(byte deviceAddress, byte[] buffer, int sizeToTransfer, out int sizeTransfered, FtI2CTransferOptions options = FtI2CTransferOptions.I2C_TRANSFER_OPTIONS_START_BIT | FtI2CTransferOptions.I2C_TRANSFER_OPTIONS_STOP_BIT | FtI2CTransferOptions.I2C_TRANSFER_OPTIONS_BREAK_ON_NACK | FtI2CTransferOptions.I2C_TRANSFER_OPTIONS_FAST_TRANSFER_BYTES)
{
return(CheckResult(LibMpsse.I2C_DeviceWrite(_i2cHandle, deviceAddress, sizeToTransfer, buffer, out sizeTransfered, (int)options)));
}
public FtResult Read(byte[] buffer, int sizeToTransfer, out int sizeTransfered, FtI2CTransferOptions options)
{
//EnforceRightConfiguration();
return LibMpsseI2C.I2C_DeviceRead(_handle, _deviceAddress, sizeToTransfer, buffer, out sizeTransfered, options);
}
public FtResult Write(byte[] buffer, int sizeToTransfer, out int sizeTransfered, FtI2CTransferOptions options)
{
return LibMpsseI2C.I2C_DeviceWrite(_handle, _deviceAddress, sizeToTransfer, buffer, out sizeTransfered, options);
}
