def test_unsupported_platform():
e = RuntimeError('Module not imported correctly!')
errorgpio = Mock(unsafe=True)
errorgpio.setmode.side_effect = e
try:
backlight(gpio_LIGHT=19, gpio=errorgpio)
except luma.core.error.UnsupportedPlatform as ex:
assert str(ex) == 'GPIO access not available'
#! /usr/bin/python
from luma.core.interface.serial import spi
from luma.core.render import canvas
from luma.lcd.device import pcd8544, st7735, uc1701x
from RPi import GPIO
from luma.lcd.aux import backlight
serial = spi(port=0, device=0, gpio_DC=23, gpio_RST=24)
channel = 18
light = backlight(gpio_LIGHT=channel, active_low=False)
light.enable(True)
device = pcd8544(serial, rotate=2)
with canvas(device) as draw:
draw.rectangle(device.bounding_box, outline="white", fill="black")
draw.text((10, 10), "阿湘！", fill="red")
raw_input("Here")
def test_active_high_enable_off():
gpio_LIGHT = 19
light = backlight(gpio=gpio, gpio_LIGHT=gpio_LIGHT, active_low=False)
gpio.reset_mock()
light.enable(False)
gpio.output.assert_called_once_with(gpio_LIGHT, gpio.LOW)
def test_active_low_enable_on():
gpio_LIGHT = 14
light = backlight(gpio=gpio, gpio_LIGHT=gpio_LIGHT)
gpio.reset_mock()
light.enable(True)
gpio.output.assert_called_once_with(gpio_LIGHT, gpio.LOW)
def test_init():
gpio_LIGHT = 11
backlight(gpio=gpio, gpio_LIGHT=gpio_LIGHT)
gpio.setmode.assert_called_once_with(gpio.BCM)
gpio.setup.assert_called_once_with(gpio_LIGHT, gpio.OUT)
gpio.output.assert_called_once_with(gpio_LIGHT, gpio.LOW)
def init_st7735(self):
light = backlight(gpio=GPIO, gpio_LIGHT=18, active_low=False)
light.enable(True)
serial = spi(port=0, device=0, gpio_DC=23, gpio_RST=24)
device = st7735(serial)
return device