import RPi.GPIO as gp
import os

gp.setwarnings(False)
gp.setmode(gp.BOARD)

gp.setup(7, gp.OUT)
gp.setup(11, gp.OUT)
gp.setup(12, gp.OUT)

gp.setup(15, gp.OUT)
gp.setup(16, gp.OUT)
gp.setup(21, gp.OUT)
gp.setup(22, gp.OUT)

gp.output(11, True)
gp.output(12, True)
gp.output(15, True)
gp.output(16, True)
gp.output(21, True)
gp.output(22, True)

def main():
    print"Start testing the camera A"
    i2c = "i2cset -y 1 0x70 0x00 0x04"
    os.system(i2c)
    gp.output(7, False)
    gp.output(11, False)
    gp.output(12, True)
    capture(1)
    print"Start testing the camera C"
    i2c = "i2cset -y 1 0x70 0x00 0x06"
    os.system(i2c)
    gp.output(7, False)
    gp.output(11, True)
    gp.output(12, False)
    capture(3)

def capture(cam):
    cmd = "raspistill -o capture_%d.jpg" % cam
    os.system(cmd)

if __name__ == "__main__":
    main()

    gp.output(7, False)
    gp.output(11, False)
    gp.output(12, True)