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#!/usr/bin/env python
import time
from datetime import datetime
from luma.led_matrix.device import max7219
from luma.core.interface.serial import spi, noop
from luma.core.render import canvas
from luma.core.legacy import text, show_message
from luma.core.legacy.font import proportional, CP437_FONT, TINY_FONT
def minute_change(device):
'''When we reach a minute change, animate it.'''
hours = datetime.now().strftime('%H')
minutes = datetime.now().strftime('%M')
def helper(current_y):
with canvas(device) as draw:
text(draw, (0, 1), hours, fill="white", font=proportional(CP437_FONT))
text(draw, (15, 1), ":", fill="white", font=proportional(TINY_FONT))
text(draw, (17, current_y), minutes, fill="white", font=proportional(CP437_FONT))
time.sleep(0.1)
for current_y in range(1, 9):
helper(current_y)
minutes = datetime.now().strftime('%M')
for current_y in range(9, 1, -1):
helper(current_y)
def animation(device, from_y, to_y):
'''Animate the whole thing, moving it into/out of the abyss.'''
hourstime = datetime.now().strftime('%H')
mintime = datetime.now().strftime('%M')
current_y = from_y
while current_y != to_y:
with canvas(device) as draw:
text(draw, (0, current_y), hourstime, fill="white", font=proportional(CP437_FONT))
text(draw, (15, current_y), ":", fill="white", font=proportional(TINY_FONT))
text(draw, (17, current_y), mintime, fill="white", font=proportional(CP437_FONT))
time.sleep(0.1)
current_y += 1 if to_y > from_y else -1
def main():
# Setup for Banggood version of 4 x 8x8 LED Matrix (https://bit.ly/2Gywazb)
serial = spi(port=0, device=0, gpio=noop())
device = max7219(serial, cascaded=4, block_orientation=-90, blocks_arranged_in_reverse_order=True)
device.contrast(16)
# The time ascends from the abyss...
animation(device, 8, 1)
toggle = False # Toggle the second indicator every second
while True:
toggle = not toggle
sec = datetime.now().second
if sec == 59:
# When we change minutes, animate the minute change
minute_change(device)
elif sec == 30:
# Half-way through each minute, display the complete date/time,
# animating the time display into and out of the abyss.
full_msg = time.ctime()
animation(device, 1, 8)
show_message(device, full_msg, fill="white", font=proportional(CP437_FONT))
animation(device, 8, 1)
else:
# Do the following twice a second (so the seconds' indicator blips).
# I'd optimize if I had to - but what's the point?
# Even my Raspberry PI2 can do this at 4% of a single one of the 4 cores!
hours = datetime.now().strftime('%H')
minutes = datetime.now().strftime('%M')
with canvas(device) as draw:
text(draw, (0, 1), hours, fill="white", font=proportional(CP437_FONT))
text(draw, (15, 1), ":" if toggle else " ", fill="white", font=proportional(TINY_FONT))
text(draw, (17, 1), minutes, fill="white", font=proportional(CP437_FONT))
time.sleep(0.5)
if __name__ == "__main__":
main()
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