def test_wrong_number_of_pins():
try:
bitbang_6800(gpio=gpio, RS=7, E=8, PINS=[25, 24, 23])
except AssertionError as ex:
assert str(
ex
) == 'You\'ve provided 3 pins but a bus must contain either four or eight pins'
def test_unsupported_gpio_platform():
try:
bitbang_6800()
except luma.core.error.UnsupportedPlatform as ex:
assert str(ex) == 'GPIO access not available'
except ImportError:
pytest.skip(rpi_gpio_missing)
def test_data():
eight_to_four = lambda data: [
f(x) for x in data for f in (lambda x: x >> 4, lambda x: 0x0F & x)
]
data = (0x41, 0x42, 0x43) # ABC
serial = bitbang_6800(gpio=gpio, RS=7, E=8, PINS=[25, 24, 23, 18])
serial.command(*eight_to_four([0x80]))
serial.data(eight_to_four(data))
setup = [call(gpio.RS, gpio.OUT), call(gpio.E, gpio.OUT)] + \
[call(gpio.PINS[i], gpio.OUT) for i in range(4)]
prewrite = lambda mode: [call(gpio.RS, mode), call(gpio.E, gpio.LOW)]
pulse = [call(gpio.E, gpio.HIGH), call(gpio.E, gpio.LOW)]
send = lambda v: [
call(gpio.PINS[i], (v >> i) & 0x01) for i in range(serial._datalines)
]
calls = \
prewrite(gpio.CMD) + send(0x08) + pulse + send(0x00) + pulse + \
prewrite(gpio.DATA) + \
send(data[0] >> 4) + pulse + \
send(data[0]) + pulse + \
send(data[1] >> 4) + pulse + \
send(data[1]) + pulse + \
send(data[2] >> 4) + pulse + \
send(data[2]) + pulse
gpio.setup.assert_has_calls(setup)
gpio.output.assert_has_calls(calls)
def test_cleanup():
serial = bitbang_6800(gpio=gpio)
serial._managed = True
serial.cleanup()
assert_only_cleans_whats_setup(gpio)
def test_cleanup():
serial = bitbang_6800(gpio=gpio)
serial._managed = True
serial.cleanup()
gpio.cleanup.assert_called_once_with()
def bitbang_6800(self):
from luma.core.interface.parallel import bitbang_6800
GPIO = self.__init_alternative_GPIO()
return bitbang_6800(gpio=self.gpio or GPIO)
from luma.core.interface.parallel import bitbang_6800
from luma.core.render import canvas
from luma.oled.device import ws0010
import time
import requests
serial = bitbang_6800(RS=7, E=8, PINS=[25,24,23,27])
device = ws0010(serial,rotate=2, selected_font='FT01') # this font supports '£' sign
owned = 0.001337
while (True):
response = requests.get('https://api.coindesk.com/v1/bpi/currentprice.json')
data = response.json()
device.text = '!!! UPDATE !!!'
currentPrice = data["bpi"]["GBP"]["rate_float"]
toGbp = round(currentPrice * owned,2)
time.sleep(1)
# other methods from the luma library doesn't seem to work with this particular screen
device.text = '£' + str(data["bpi"]["GBP"]["rate"]) + '\n£' + str(toGbp)
time.sleep(30)