serialecho

Simple serial port test program for new boards.

Run with the tx and rx jumpered.

    root@beaglebone:~# serialecho -h
    
    Usage: serialecho [-d <device>] [-s <speed>] [-h]
      -d <device>    Serial device, default is /dev/ttyO4
      -s <speed>     Speed, default is 115200
      -h             Show this help


    root@beaglebone:~# serialecho
    
    --- ctrl-c to stop ---

    Wrote: ABCDEFJHIJKLMNOPQRSTUVWXYZ1234567890abcdefjhijklmnopqrstuvwxyz
    Read : ABCDEFJHIJKLMNOPQRSTUVWXYZ1234567890abcdefjhijklmnopqrstuvwxyz
    
    Wrote: ABCDEFJHIJKLMNOPQRSTUVWXYZ1234567890abcdefjhijklmnopqrstuvwxyz
    Read : ABCDEFJHIJKLMNOPQRSTUVWXYZ1234567890abcdefjhijklmnopqrstuvwxyz
    
    Wrote: ABCDEFJHIJKLMNOPQRSTUVWXYZ1234567890abcdefjhijklmnopqrstuvwxyz
    Read : ABCDEFJHIJKLMNOPQRSTUVWXYZ1234567890abcdefjhijklmnopqrstuvwxyz
    ^C