Added examples to project

Author: mrmcwethy

examples/showbcddigits.py

@@ -0,0 +1,86 @@
+import time
+import random
+from board import TX, RX, A2
+import busio
+import digitalio
+from adafruit_max7219 import bcddigits
+
+mosi = TX
+clk = RX
+cs = digitalio.DigitalInOut(A2)
+
+spi = busio.SPI(clk, MOSI=mosi)
+
+leds = bcddigits.BCDDigits(spi, cs, nDigits=8)
+while True:
+    # clear display and dim 0
+    leds.brightness(0)
+    leds.clear_all()
+
+    # place 8-digit number on display
+    value = 12345678
+    leds.show_str(0, '{:8}'.format(value))
+    leds.show()
+
+    # increase the brightness slowly
+    for i in range(16):
+        leds.brightness(i)
+        time.sleep(0.5)
+
+    leds.brightness(3)
+
+    # show "-HELP-90" on display
+    leds.show_str(6, '90')  # show 90 starting at position 6
+    leds.set_digit(0, 10)   # show - at position 0
+    leds.set_digit(1, 12)   # show H at position 1
+    leds.set_digit(2, 11)   # show E at position 2
+    leds.set_digit(3, 13)   # show L at position 3
+    leds.set_digit(4, 14)   # show P at position 4
+    leds.set_digit(5, 10)   # show - at position 5
+
+    leds.show()
+    time.sleep(1.0)
+
+    leds.clear_all()
+    leds.brightness(5)
+
+    # set the two dots and two 4-digit numbers
+    leds.show_dot(2, 1)
+    leds.show_dot(6, 1)
+    leds.show_str(0, ' 72.5')
+    leds.show_str(4, '-10.8')
+
+    leds.show()
+    time.sleep(1.0)
+
+    leds.brightness(10)
+    leds.clear_all()
+    # show a 4 character numeric string
+    leds.show_str(0, '   0')
+    leds.show()
+    time.sleep(1.0)
+
+    leds.clear_all()
+    # show 0->8
+    for digit in range(8):
+        leds.set_digit(digit, digit)
+
+    leds.show()
+    time.sleep(1.0)
+
+    # show random 8-digit numbers via show_str
+    for _ in range(10):
+        number = random.uniform(-1.0, 1.0)
+        number *= 10000.0
+        number_string = '{:9.3f}'.format(number)
+        leds.clear_all()
+        leds.show_str(0, number_string)
+        leds.show()
+        time.sleep(1.0)
+
+    # show the help string
+    leds.clear_all()
+    leds.show_help(2)
+    leds.show()
+
+    time.sleep(1.0)

examples/showmatrix.py

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+import time
+from board import TX, RX, A2
+import busio
+import digitalio
+from adafruit_max7219 import matrices
+
+mosi = TX
+clk = RX
+cs = digitalio.DigitalInOut(A2)
+
+spi = busio.SPI(clk, MOSI=mosi)
+
+matrix = matrices.Matrix8x8(spi, cs)
+while True:
+    print("Cycle start")
+    # all lit up
+    matrix.fill(True)
+    matrix.show()
+    time.sleep(0.5)
+
+    # all off
+    matrix.fill(False)
+    matrix.show()
+    time.sleep(0.5)
+
+    # one column of leds lit
+    for i in range(8):
+        matrix.pixel(1, i, 1)
+    matrix.show()
+    time.sleep(0.5)
+    # now scroll the column to the right
+    for j in range(8):
+        matrix.scroll(1, 0)
+        matrix.show()
+        time.sleep(0.5)
+
+    # show a string one character at a time
+    adafruit = 'Adafruit'
+    for char in adafruit:
+        matrix.fill(0)
+        matrix.text(char, 0, 0)
+        matrix.show()
+        time.sleep(1.0)
+
+    # scroll the last character off the display
+    for i in range(8):
+        matrix.scroll(-1, 0)
+        matrix.show()
+        time.sleep(0.5)
+
+    # scroll a string across the display
+    for pixel_position in range(len(adafruit) * 8):
+        matrix.fill(0)
+        matrix.text(adafruit, -pixel_position, 0)
+        matrix.show()
+        time.sleep(0.25)