Update examples to more expected pinout

Author: tekktrik

examples/max7219_custommatrixtest.py

@@ -2,14 +2,15 @@
 # SPDX-License-Identifier: MIT
 
 import time
-from board import TX, RX, A1
+import board
 import busio
 import digitalio
 from adafruit_max7219 import matrices
 
-mosi = TX
-clk = RX
-cs = digitalio.DigitalInOut(A1)
+# You may need to change the chip select board depending on your wiring
+mosi = board.MOSI
+clk = board.CLK
+cs = digitalio.DigitalInOut(board.D4)
 
 spi = busio.SPI(clk, MOSI=mosi)
 

examples/max7219_showbcddigits.py

@@ -3,14 +3,15 @@
 
 import time
 import random
-from board import TX, RX, A1
+import board
 import busio
 import digitalio
 from adafruit_max7219 import bcddigits
 
-mosi = TX
-clk = RX
-cs = digitalio.DigitalInOut(A1)
+# You may need to change the chip select board depending on your wiring
+mosi = board.MOSI
+clk = board.CLK
+cs = digitalio.DigitalInOut(board.D4)
 
 spi = busio.SPI(clk, MOSI=mosi)
 

examples/max7219_simpletest.py

@@ -2,14 +2,15 @@
 # SPDX-License-Identifier: MIT
 
 import time
-from board import TX, RX, A1
+import board
 import busio
 import digitalio
 from adafruit_max7219 import matrices
 
-mosi = TX
-clk = RX
-cs = digitalio.DigitalInOut(A1)
+# You may need to change the chip select board depending on your wiring
+mosi = board.MOSI
+clk = board.CLK
+cs = digitalio.DigitalInOut(board.D4)
 
 spi = busio.SPI(clk, MOSI=mosi)