No issue: made a script to switch cameras and a new overlay

So, I have a Chevrolet Volt, which has pretty poor vision to the front. I wanted to be able to switch camera's when I need to park.

I copied the cam_overlay folder and changed the names of the folder and bin file to some thing with rearcam and frontcam.

I made these overlays.

Frontcam overlay

New Project-2(9)

Rearcam overlay

New Project-2(8)

Illustration of the buttons the script makes

New Project-2

Bash Script

#!/bin/bash
device='/dev/input/event0'

coord_x_check='*type 3 (EV_ABS), code 0 (ABS_X), value*'
coord_y_check='*type 3 (EV_ABS), code 1 (ABS_Y), value*'
running_cam=1
echo "Rearcam activated on default"
~/rearcam_overlay/bin/rearcam.bin -d /dev/v4l/by-id/usb-ARKMICRO_USB2.0_PC_CAMERA-video-index0 &
sudo evtest "$device" | while read line; do
    case $line in
        ($coord_x_check)    x=$(echo $line | awk -F value '{ print $2 }' | tr -dc '0-9');;
        ($coord_y_check)    y=$(echo $line | awk -F value '{ print $2 }' | tr -dc '0-9')
        if (( $x>=1920 && $y<=850 && $running_cam==1 ));
        then
                echo Rearcam deactivated
                killall -wq rearcam.bin &

                echo Frontcam activated X $x  Y $y
                ~/frontcam_overlay/bin/frontcam.bin -d /dev/v4l/by-id/usb-ARKMICRO_USB2.0_PC_CAMERA-video-index0 &
                running_cam=2
                sleep 1
        elif (( $x>=1920 && $y<=850 && $running_cam==2 ));
        then
                echo Frontcam is running allready
        elif (( $x<=1919 && $y<=850 && $running_cam==2 ));
        then
                echo Frontcam deactivated
               killall -wq frontcam.bin &
                echo Rearcam activated X $x Y $y
                ~/cam_overlay/bin/rearcam.bin -d /dev/v4l/by-id/usb-ARKMICRO_USB2.0_PC_CAMERA-video-index0 &
                running_cam=1
                sleep 1
        elif (( $x<=1919 && $y<=850 && $running_cam==1 ));
        then
                echo Rearcam is running allready
        elif (( $y>850 && $running_cam==1 ));
        then
                echo Camview deactivated X $x Y $y
                killall -wq rearcam.bin
                killall -wq test-2.sh
                exit 1
        elif (( $y>850 && $running_cam==2 ));
        then
                echo Camview deactivated X $x Y $y
                killall frontcam.bin &
                killall camview.sh    #this script
                exit 1

        fi
        ;;
    esac
sleep 0.1
done

You should find out using evtest what the min X & Y values and max X & Y values are. Also check where you like to have the buttons and check the values. Use them in this script.

meekys / cam_overlay