def speaker_gpio(gpio_pin):
if gpio_pin == 0:
print('Using DummyGPIO')
class DummyGPIO:
def set(self):
pass
def reset(self):
pass
yield DummyGPIO()
print('Allocing pin {gpio_pin}.format(gpio_pin)', sys.stderr)
gpio = Controller.alloc_pin(gpio_pin, OUTPUT)
try:
yield gpio
finally:
print('Deallocing pin {}'.format(gpio_pin), sys.stderr)
gpio.reset()
Controller.dealloc_pin(gpio_pin)
def destroy(self):
self.pin_controller.set()
Controller.dealloc_pin(self.PIN)
reactor.stop()
self.delayMicroseconds(1) # commands need > 37us to settle
def message(self, text):
""" Send string to LCD. Newline wraps to second line"""
for char in text:
if char == '\n':
self.write4bits(0xC0) # next line
else:
self.write4bits(ord(char), True)
def loop():
lcd = CharLCD()
while True:
lcd.clear()
sleep(2)
lcd.message(" TEST MODE !\n Whatup?")
sleep(10)
return lcd
if __name__ == '__main__':
try:
lcd = loop()
reactor.run()
except:
for pin in Controller.available_pins:
Controller.dealloc_pin(pin)
reactor.stop()