Simple script to run a timelapse on a canon camera from a raspberry pi with an attached HD44780 display

timelapse.py

from hd44780 import HD44780
import ctypes

from time import sleep

class CameraFilePath(ctypes.Structure):
    _fields_ = [('name', (ctypes.c_char * 128)),
        ('folder', (ctypes.c_char * 1024))]

gp = ctypes.CDLL('libgphoto2.so.2')

context = gp.gp_context_new()

camera = ctypes.c_void_p()

gp.gp_camera_new(ctypes.pointer(camera))
gp.gp_camera_init(camera, context)

cam_path = CameraFilePath()

lcd = HD44780()

while 1:

    for i in reversed(range(1,4)):
        lcd.clear()
        lcd.message('taking picture\n in %s seconds' % i)
        sleep(1)

    lcd.clear()
    lcd.message('Capturing...')

    gp.gp_camera_capture(camera, 0, ctypes.pointer(cam_path), context)