Blog 18

Settings Menu

Hardware I used on my Raspberry Pi:

• RPi_UI board | (User Interface)

Programmed in:

• bash

In this post I will show the menu I made, where you can change the: Backlight, Contrast and Volume.

The overall script is based on the scroll menu from blog 1312314

#!/bin/bash

bw_tool -I -D /dev/i2c-1 -a 94 -W 10:00

while true; do
BUTTON=`bw_tool -I -D /dev/i2c-1 -a 94 -R 30:b`

array=(   Volume Contrast Backlight )
# Element 0      1        2 

Narray=(  VOLUME CONTRAST BACKLIGHT )
# Element 0      1        2

  if [ $BUTTON  != "00" ]; then
     bw_tool -I -D /dev/i2c-1 -a 94 -W 10:00
  fi

  if [ $BUTTON  = "20" ]; then
     ./${array[$Number]}
  fi

  if [ $BUTTON  = "10" ]; then
    ./${array[$Numb2]}
  fi

  if [ $BUTTON  = "08" ]; then
     Number=0
  fi

  if [ $BUTTON  = "04" ]; then
     exit
  fi

  if [ $BUTTON  = "02" ]; then
     Number=$(((Number + 2) % 3 ))
  fi

  if [ $BUTTON  = "01" ]; then
     Number=$(((Number + 1) % 3 ))
  fi

Numb2=$((Number + 1))
Numb3=$((Numb2 + 1))

bw_tool -I -D /dev/i2c-1 -a 94 -W 11:00
bw_tool -I -D /dev/i2c-1 -a 94 -t "$Numb2""."${Narray[$Number]}
bw_tool -I -D /dev/i2c-1 -a 94 -W 11:20
bw_tool -I -D /dev/i2c-1 -a 94 -t "$Numb3""."${Narray[$Numb2]} 

sleep 1

done

Backlight/Contrast

#!/bin/bash
 
bw_tool -I -D /dev/i2c-1 -a 94 -W 10:00

while true; do
BUTTON=`bw_tool -I -D /dev/i2c-1 -a 94 -R 30:b`

array=(   00 19 33 4c 66 7F 99 B2 CC E5 FF )
# Element 0  1  2  3  4  5  6  7  8  9  10

Narray=(   00 10 20 30 40 50 60 70 80 90 100 )
# Name     0  1  2  3  4  5  6  7  8  9  10 

 if [ $BUTTON  != "00" ]; then
    bw_tool -I -D /dev/i2c-1 -a 94 -W 10:00
 fi

 if [ $BUTTON  = "04" ]; then
    exit
 fi

 if [ $BUTTON  = "02" ]; then
    Number=$(((Number + 10) % 11 )) # can be changed to 11 if you want it to get 1 down
 fi

 if [ $BUTTON  = "01" ]; then
    Number=$(((Number + 1) % 11 )) #can be changed to 1 if you want to get it up by 1 / I did 2 because speed
 fi

bw_tool -I -D /dev/i2c-1 -a 94 -W 11:00
bw_tool -I -D /dev/i2c-1 -a 94 -t "$Numb2"${Narray[$Number]}
bw_tool -I -D /dev/i2c-1 -a 94 -W 13:${array[$Number]}

sleep 1
done

Volume

#!/bin/bash

DISPL="bw_tool -I -D /dev/i2c-1 -a 94"

while true; do
BUTTON=`bw_tool -I -D /dev/i2c-1 -a 94 -R 30:b`

array=(   00 10 20 30 40 50 60 70 80 90 100 )
# Element 0  1  2  3  4  5  6  7  8  9  10

  if [ $BUTTON  != "00" ]; then
     bw_tool -I -D /dev/i2c-1 -a 94 -W 10:00
  fi

  if [ $BUTTON  = "04" ]; then
  exit
  fi

  if [ $BUTTON  = "20" ]; then
  amixer -c 0 set PCM 5dB-
  #mplayer ru.mp3
  fi

  if [ $BUTTON  = "10" ]; then
  amixer -c 0 set PCM 5dB+
  #mplayer ru.mp3
  fi

  if [ $BUTTON  = "02" ]; then
  amixer -c 0 set PCM 10dB-
  #mplayer ru.mp3
  fi 

  if [ $BUTTON  = "01" ]; then
  amixer -c 0 set PCM 10dB+
  #mplayer ru.mp3
  fi

$DISPL -W 11:00:b
$DISPL -t `amixer | grep Mono: | sed -e 's/%] .*//' -e 's/.* \[//'`

sleep 1
done

Useful links

User Interface