public void QueueMessage(LCDMessage msg)
{
Log.WriteLine("UARTDevice Qmsg");
_msgq.Add(msg);
}
public async Task InitAsync()
{
// reset display
// configure display
await SendCmdAsync(LCD_CMD_SET_SAVE_SIZE);
await WriteByteAsync(LCD_COLS);
await WriteByteAsync(LCD_ROWS);
await SendCmdAsync(LCD_CMD_DISPLAY_ON);
await WriteByteAsync(0); // unclear why display on needs an extra 0 byte. but, it does -- see firmware source.
await AsAsync(_write.StoreAsync());
Log.WriteLine("display on cmd sent, pausing");
Thread.Sleep(TimeSpan.FromMilliseconds(300));
await SendCmdAsync(LCD_CMD_DISPLAY_OFF); // display off doesn't need the mystery 0
Log.WriteLine("display off cmd sent, pausing");
Thread.Sleep(TimeSpan.FromMilliseconds(1000));
await SendCmdAsync(LCD_CMD_DISPLAY_ON);
await WriteByteAsync(0); // unclear why display on needs an extra 0 byte. but, it does -- see firmware source.
await AsAsync(_write.StoreAsync()); //flush before pause
Thread.Sleep(TimeSpan.FromMilliseconds(300));
Log.WriteLine("display on again pausing");
await SendCmdAsync(LCD_CMD_BLOCK_CURSOR_OFF);
await SendCmdAsync(LCD_CMD_UNDERLINE_CURSOR_ON);
await Clear();
Log.WriteLine("cleared screen with underline cursor");
await SetContrast(220); // 220 is what the device reference code python test uses
await SetBrightness(0xff);
await SetBackgroundAsync(Colors.Red);
_msgTask = Task.Factory.StartNew(async() =>
{
try
{
while (!_msgCancel.Token.IsCancellationRequested)
{
LCDMessage msg = _msgq.Take();
Log.WriteLineVerbose("msgq processing {0}, {1} clear, msg {2}", msg.bgcolor, msg.clear ? "do" : "do net", msg.msg);
await SetBackgroundAsync(msg.bgcolor);
if (msg.clear)
{
await Clear();
}
if ((msg.msg != null) && (msg.msg.Length > 0))
{
await WriteStringAsync(msg.msg);
}
}
} catch (Exception e)
{
Log.WriteLineError("UART msgq consumer exception {0}", e.ToString());
}
},
_msgCancel.Token,
TaskCreationOptions.LongRunning,
TaskScheduler.Default
);
Log.WriteLine("init complete");
return;
}