# string= break up string to fill all four lines in the correct order
# usr/bin/lcd_out_4x20 is on the USB stick

#!/bin/sh


LCDOUT=/usr/bin/lcd_out_4x20

#stringZ="test output"
# will come from web page via LCDsend.cgi

lineone=`expr substr "$stringZ" 1 20`

linetwo=`expr substr "$stringZ" 21 20`

linethree=`expr substr "$stringZ" 41 20`

linefour=`expr substr "$stringZ" 61 20`


echo '<font color=blue size=3 face=Arial>'
echo 'on the LCD screen <br>'
echo 'your message will look like this - <br><br>'
echo '</font>'

echo '<font color=red size=5 face=Arial>'

echo  $lineone
echo '<BR>'

echo  $linetwo
echo '<BR>'

echo  $linethree
echo '<BR>'

echo  $linefour
echo '<br><br></font>'

echo '<font color=blue size=3 face=Arial>'
echo 'on the Sweex LCD display'
echo '<br></font>'


#initiallise the display
$LCDOUT -i
 usleep 60000
 #do it again - bug in driver?
 $LCDOUT -i
 usleep 60000
 
 #send the firstline - this will never be empty
$LCDOUT `expr substr "$stringZ" 1 20`
 usleep 60000
 
 #create the next lines and stop when line is empty
line=2
while true; do
  offset=`expr '(' $line - 1 ')' '*' 20 + 1`
  str=`expr substr "$stringZ" $offset 20`
  if [ "$str" = "" ]; then break; fi
  #(do not  send empty lines)
  
  #say which line to fill
  $LCDOUT -$line
  usleep 60000
  
  #send the string to fill it
  $LCDOUT $str
  usleep 60000
  line=`expr $line + 1`
done


#thanks to my anonymous helper for the last bit!