Code hang: while (Serial2.read() != -1) ; about opencm9.04 HOT 4 CLOSED

Thanks

from opencm9.04.

I should mention this causes other parts of the Arduino Stream code to not work as well.

That is if you do something like: Note: XBSerial is defined as Serial2

XBeeSerial.print(F("+++")); 
XBeeSerial.flush();
XBeeSerial.setTimeout(20);  // give a little extra time
if (XBeeSerial.readBytesUntil('\r', ab, 10) > 0) {

The call to readBytesUntil will not work properly as it loops calling timedRead

int c = timedRead();

Which in Stream.cpp is defined as:

int Stream::timedRead()
{
  int c;
  startMillis = millis();
  do {
    c = read();
    if (c >= 0) return c;
  } while(millis() - _startMillis < _timeout);
  return -1;     // -1 indicates timeout
}

from opencm9.04.

Hello, @KurtE
Thank you for letting us know about this issue.

you're right.
In order to be compatible with existing Arduino codes, the following must be fulfilled.

The first byte of incoming serial data available (or -1 if no data is available) - int.

But we were just returning the size of the data. That is, if there is no data, it returns 0.
We will fix this and we will test out what you have mentioned and release it as soon as possible.

And,
The reason we did not include the source file is to reduce the build time.
Therefore, the source file is converted to a library file (.a).
If you want a source file, you can get it from this repository.

from opencm9.04.

@KurtE

I have modified the code and confirmed that it works.
However, it may take some time to release.

If you need to use it right away, please copy the lib_f103.a file in the develop branch to the location(refer to picture below) where the ArduinoBoard package is installed.

from opencm9.04.