/// <summary>
/// Writes a specified number of characters to the serial port using data from a buffer.
/// </summary>
/// <param name="buffer">The byte array that contains the data to write to the port.</param>
/// <param name="offset">The zero-based byte offset in the buffer parameter at which to begin copying bytes to the port.</param>
/// <param name="count">The number of bytes to write.</param>
/// <remarks></remarks>
public async Task Write(byte[] buffer, int offset, int count)
{
Utils.PrintDeep("-------WRITE_START-------");
Utils.PrintDeep("BleSerial.Write.." +
" Buffer " + Utils.ByteArrayToString(buffer) +
" | Offset ( is always ) " + offset.ToString("D2") +
" | NumBytesToWrite " + count.ToString("D2"));
try
{
ExceptionCheck(buffer, offset, count);
ble_port_serial.ClearBuffer();
if (ble_port_serial.semaphore.CurrentCount <= 0)
{
ble_port_serial.semaphore.Release();
}
ble_port_serial.timeInit = 0L;
int totalBytesToWrite = count;
int bytesWritten = 0;
do
{
// Each data frame max length is 16
int bytesDataFrame = (totalBytesToWrite < 16) ? totalBytesToWrite : 16;
Utils.PrintDeep("BleSerial.Write.." +
" Next stream " + bytesDataFrame.ToString("D2") + " bytes" +
" | Written " + bytesWritten.ToString("D2") + "/" + count.ToString("D2"));
await ble_port_serial.Write_Characteristic(buffer, bytesWritten + offset, bytesDataFrame);
totalBytesToWrite -= bytesDataFrame;
bytesWritten += bytesDataFrame;
}while (totalBytesToWrite > 0);
}
catch (Exception e)
{
Utils.PrintDeep("BleSerial.Write -> ERROR: " + e.Message);
throw e;
}
finally
{
Utils.PrintDeep("-------WRITE_FINISH------");
}
}
/// <summary>
/// Writes a specified number of characters to the serial port using data from a buffer.
/// </summary>
/// <param name="buffer">The byte array that contains the data to write to the port.</param>
/// <param name="offset">The zero-based byte offset in the buffer parameter at which to begin copying bytes to the port.</param>
/// <param name="count">The number of bytes to write.</param>
/// <remarks></remarks>
public void Write(byte[] buffer, int offset, int count)
{
int bytesToWrite = count;
int bytesWritten = 0;
ExceptionCheck(buffer, offset, count);
do
{
int currentWriteCount = 16;
if (bytesToWrite <= 16)
{
currentWriteCount = bytesToWrite;
}
ble_port_serial.ClearBuffer(); // TO-DO
ble_port_serial.Write_Characteristic(buffer, bytesWritten + offset, currentWriteCount);
// TODO: check ack before next iteration
bytesToWrite = bytesToWrite - currentWriteCount;
bytesWritten = bytesWritten + currentWriteCount;
}while (bytesToWrite > 0);
}