#!/bin/bash
#  not maemo specific.
#
# usage: u1233 READ?
# This script takes commands like SYST:BATT? or FETC? as parameter 
#  and fetches the result from KeySight U1233A via U1173A USB/IR adapter (ttyUSB0) 
dev=/dev/ttyUSB0
timeout=0.5
#why exec? cruft for this simple version, needed to keep filehandle open when we add loops etc
exec 4>$dev 5<$dev
stty 1:0:cbd:0:3:1c:7f:15:4:5:1:0:11:13:1a:0:12:f:17:16:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0 <&5

#prolly cruft, and didn't help flush the buffer when some other process keeps the file handle open (exec >/dev/bla)
read -t 0 void <&5

docmd() {
  (read -t $timeout result <&5
  echo $result)&
  echo "$@" >&4
  wait
}


while docmd "$@"; do :;done