def test_overflow():
device = dummy(width=24, height=8, mode="1")
seg = sevensegment(device)
with pytest.raises(OverflowError) as ex:
seg.text = "This is too big to fit in 3x8 seven-segment displays"
assert str(
ex.value
) == "Device's capabilities insufficent for value 'This is too big to fit in 3x8 seven-segment displays'"
def main():
device = pygame(width=24, height=8, transform="sevensegment", scale=1)
virtual = viewport(device, width=1024, height=8)
seg = sevensegment(virtual)
for line in blurb.split("\n"):
seg.text = (" " * device.width) + line
for x in range(len(line)):
virtual.set_position((x, 0))
time.sleep(0.2)
def show_message_vp(device, msg, delay=0.1):
# Implemented with virtual viewport
width = device.width
padding = " " * width
msg = padding + msg + padding
n = len(msg)
virtual = viewport(device, width=n, height=8)
sevensegment(virtual).text = msg
for i in reversed(list(range(n - width))):
virtual.set_position((i, 0))
time.sleep(delay)
def test_setter_getter():
img_path = get_reference_image('golden_ratio.png')
with open(img_path, 'rb') as img:
reference = Image.open(img)
device = dummy(width=24, height=8)
seg = sevensegment(device)
seg.text = "1.61803398875"
assert str(seg.text) == "1.61803398875"
bbox = ImageChops.difference(reference, device.image).getbbox()
assert bbox is None
def main():
# create seven segment device
serial = spi(port=0, device=0, gpio=noop())
device = max7219(serial, cascaded=1)
seg = sevensegment(device)
print('Simple text...')
for _ in range(8):
seg.text = "HELLO"
time.sleep(0.6)
seg.text = " GOODBYE"
time.sleep(0.6)
# Digit slicing
print("Digit slicing")
seg.text = "_" * seg.device.width
time.sleep(1.0)
for i, ch in enumerate([9, 8, 7, 6, 5, 4, 3, 2]):
seg.text[i] = str(ch)
time.sleep(0.6)
for i in range(len(seg.text)):
del seg.text[0]
time.sleep(0.6)
# Scrolling Alphabet Text
print('Scrolling alphabet text...')
show_message_vp(device, "HELLO EVERYONE!")
show_message_vp(device, "PI is 3.14159 ... ")
show_message_vp(device, "IP is 127.0.0.1 ... ")
show_message_alt(
seg,
"0123456789 abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ")
# Digit futzing
date(seg)
time.sleep(5)
clock(seg, seconds=10)
# Brightness
print('Brightness...')
for x in range(5):
for intensity in range(16):
seg.device.contrast(intensity * 16)
time.sleep(0.1)
device.contrast(0x7F)
def test_init():
device = dummy(width=24, height=8, mode="1")
sevensegment(device)
assert device.image == Image.new("1", (24, 8))