pici_LED_matrix_demo.py

from _thread import start_new_thread
from machine import Pin
from random import randrange as rng
import time

class matrix:
	#           A  B  C  D  E  F  G
	segments = [ 9,10,11,12,13,14,15]# pin numbers for segments
	digits = [28,27,26,22]# pin numbers for digits
	value = [11,11,11,11]# default array index for each digit, see segments array

# setup pins
outs_high=[matrix.digits, matrix.segments]
for x in range(len(outs_high)):
	for i in range(len(outs_high[x])):
		outs_high[x][i]=Pin(outs_high[x][i], mode=Pin.OUT)
		outs_high[x][i].value(1)

def LED_panel():
	print("LED panel running on core 2")
	# 7 Segment LED layout
	#   A
	# F   B
	#   G
	# E   C
	#   D
	segments=[
		#A B C D E F G
		[0,0,0,0,0,0,1],# 0
		[1,0,0,1,1,1,1],# 1
		[0,0,1,0,0,1,0],# 2
		[0,0,0,0,1,1,0],# 3
		[1,0,0,1,1,0,0],# 4
		[0,1,0,0,1,0,0],# 5
		[1,1,0,0,0,0,0],# 6
		[0,0,0,1,1,1,1],# 7
		[0,0,0,0,0,0,0],# 8
		[0,0,0,1,1,0,0],# 9
		[1,1,1,1,1,1,0],# -
		[1,1,1,1,1,1,1],# blank
		[0,0,0,1,0,0,0],# A
		[0,1,1,0,0,0,1],# C
		[0,1,1,0,0,0,0],# E
		[0,1,1,1,0,0,0],# F
		[1,0,0,0,0,1,1],# J
		[1,1,1,0,0,0,1],# L
		[0,0,1,1,0,0,0],# P
		[1,0,0,0,0,0,1] # U
		#A B C D E F G
	]

	then=3
	now=0
	while True:
		then=now
		now=then+1
		if now>3:
			now=0
		matrix.digits[then].value(1)
		ct=0
		for i in segments[matrix.value[now]]:
			matrix.segments[ct].value(i)
			ct=ct+1
		matrix.digits[now].value(0)
		time.sleep_ms(7)

start_new_thread(LED_panel,())

#test output on panel
matrix.value[0]=1
matrix.value[1]=2
matrix.value[2]=3
matrix.value[3]=4
time.sleep(5)
while True:
	#random ouptut every second
	for i in [0,1,2,3]:
		matrix.value[i]=rng(0,19)
	time.sleep(1)