Just an example of use:
# +------------------------------------------------------------+
# | K5 --------- L16 L12 L08 L04 L00 |
# | [16] / AD \ [11] [15] [20] [22] [28] |
# | / . \ |
# | K4 K2 K3 | /|\ | [10] [18] [19] [21] [27] |
# |[17] [13] [14] | . | |
# | | | | [09] [07] [05] [03] [01] |
# | K1 \ | / |
# | [12] \ [26] / [08] [06] [04] [02] [00] |
# | --------- |
# +------------------------------------------------------------+
#
# [XX] - GPIOXX
from machine import Pin
import time
import urandom
Blink = Pin(25, Pin.OUT) # ONBOARD LED
led=[28,27,01,00,22,21,03,02,20,19,05,04,15,18,07,06,11,10,09,08]
Pin(led[00], Pin.OUT) # 28
Pin(led[01], Pin.OUT) # 27
Pin(led[02], Pin.OUT) # 1
Pin(led[03], Pin.OUT) # 0
Pin(led[04], Pin.OUT) # 22
Pin(led[05], Pin.OUT) # 21
Pin(led[06], Pin.OUT) # 3
Pin(led[07], Pin.OUT) # 2
Pin(led[08], Pin.OUT) # 20
Pin(led[09], Pin.OUT) # 19
Pin(led[10], Pin.OUT) # 5
Pin(led[11], Pin.OUT) # 4
Pin(led[12], Pin.OUT) # 15
Pin(led[13], Pin.OUT) # 18
Pin(led[14], Pin.OUT) # 7
Pin(led[15], Pin.OUT) # 6
Pin(led[16], Pin.OUT) # 11
Pin(led[17], Pin.OUT) # 10
Pin(led[18], Pin.OUT) # 9
Pin(led[19], Pin.OUT) # 8
print("")
print("+----------------------------------------------------------+")
print("| The display will show a variable randon patern of LED's! |")
print("+----------------------------------------------------------+")
while True:
i = urandom.randint(0, 19)
Pin(led[i], Pin.OUT).toggle()
Blink.toggle()
time.sleep(.05)
