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PiFaceCAD Looping Hello_Video Project

Former Member

Hello all. I'm somewhat of a NOOB to the Pi and the PiFace (more the PiFace than anything).

 

I'm working on a project that is based on this projects:raspi_video_loop - xuv's notebook where I'm using hello_video for a looping display.

I want to use the PiFace 0-4 buttons to fire off a script that will change what graphic is playing.

Ideally there'd be a menu on screen 1)FirstGraphic 2)SecondGraphic 3)Third Graphic 4)Fourth Graphic to indicate what graphics are loaded on which buttons (this will be static so won't need feedback from anything).

My biggest issue is that I really don't know a whole lot about python programming. I played around with the simple lcd_on lcd_of write text stuff that's on the page but beyond that I have no idea where to go with it.

 

Essentially it seems very simple to me. Press button 1. Fire off script which says "copy graphicone.h264" to overwrite the "loop.h264 graphic".

 

Can anyone point me in the right direction here? There's not a ton of info out there on this so was hoping y'all could help.

 

Regards,

SS

  • Ok! So thanks to the simple menu script This PiFace menu tutorial keeps it simple @Raspberry_Pi #piday #raspberrypi « adafruit industries blog I was able to manipulate the code and make it work for me.

    Here's what I ended up coming up with. Works for me. The only thing I'd like to change is the on/off backlight buttons leave the "3" and "4" on the screen after being pressed. Is it just a matter of doing a clear? Or?

     

    Start Code

     

    import pifacecad

    import time

     

     

    def update_pin_text(event):

            event.chip.lcd.write(str(event.pin_num))

            choice = event.pin_num

            if choice == 0:

                    cad.lcd.clear()

                    cad.lcd.write("Seal Selected")

                    import subprocess

                    p = subprocess.Popen("seal")

                    output, err = p.communicate()

                    cad.lcd.clear()

                    cad.lcd.backlight_on()

                    cad.lcd.write("1:Seal 2:Aerial\n3:Bars")

            if choice == 1:

                    cad.lcd.clear()

                    cad.lcd.write("Aerial Selected")

                    import subprocess

                    p = subprocess.Popen("aerial")

                    output, err = p.communicate()

                    cad.lcd.clear()

                    cad.lcd.backlight_on()

                    cad.lcd.write("1:Seal 2:Aerial\n3:Bars")

            if choice == 2:

                    cad.lcd.clear()

                    cad.lcd.write("Bars Selected")

                    import subprocess

                    p = subprocess.Popen("bars")

                    output, err = p.communicate()

                    cad.lcd.clear()

                    cad.lcd.backlight_on()

                    cad.lcd.write("1:Seal 2:Aerial\n3:Bars")

     

     

            if choice ==3:

                    cad.lcd.backlight_on()

            if choice ==4:

                    cad.lcd.backlight_off()

     

     

     

     

    cad = pifacecad.PiFaceCAD()

    cad.lcd.backlight_on()

    cad.lcd.write("DevPi \nv1.1")

    time.sleep(2)

    cad.lcd.clear()

    cad.lcd.write("1:Seal 2:Aerial\n3:Bars")

     

     

    listener = pifacecad.SwitchEventListener(chip=cad)

    for i in range (6):

            listener.register(i, pifacecad.IODIR_FALLING_EDGE, update_pin_text)

    listener.activate()

     

    END CODE