I am opening a serial port to a device that is already streaming data at 9600B. Occasionally I get a "Buffer Overrun detected" message, which I do not know how to get out of and so have to ^C and start over.

I have tried the 'lookclear' and 'purge_all' method (both return a '1') and it still happens.

Even when I read part of the buffer, kill the program, and restart (with data still in the buffer) it may still happen

$AppMainBoard_Port = Win32::SerialPort->start ($app_cfgfile)
@result=$AppMainBoard_Port->lookclear;
print "Result: @result\n";
@result=$AppMainBoard_Port->purge_all;
print "Result: @result\n";
for ($i=0 ;; ) {
  if ( $c = $AppMainBoard_Port -> input) {
    print "$c";
    do_other-stuff;
  }
}

[download]

I will get a print of $result, but often get a buffer overrun as soon as I get to 'input'

Since starting this post, I tried changing '->input' to '->read(4096)' which SEEMS to have solved the problem so far, but would be happy to hear what the Monks have to say!

Thanks, Chris

In reply to Serial Buffer Overrun by ccherri

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