Create gemma_main.py

CircuitPython_TVBGone/gemma_main.py

@@ -0,0 +1,58 @@
+# Gemma M0 version of TVBgone
+# This will NOT work with CircuitPython 7 and later
+# as PulseOut is no longer available on Gemma M0
+# Here for educational/research purposes only
+
+import array
+import time
+
+import adafruit_dotstar
+import board
+import pulseio
+from digitalio import DigitalInOut, Direction
+
+# pylint: disable=eval-used
+
+pixel = adafruit_dotstar.DotStar(
+    board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2)
+pixel.fill((0, 0, 0))
+
+# Button to see output debug
+led = DigitalInOut(board.D13)
+led.direction = Direction.OUTPUT
+
+pwm = pulseio.PWMOut(board.A2, frequency=38000,
+                     duty_cycle=2 ** 15, variable_frequency=True)
+pulse = pulseio.PulseOut(pwm)
+
+time.sleep(0.5)  # Give a half second before starting
+
+# gooooo!
+f = open("/codes.txt", "r")
+for line in f:
+    code = eval(line)
+    print(code)
+    pwm.frequency = code['freq']
+    led.value = True
+    # If this is a repeating code, extract details
+    try:
+        repeat = code['repeat']
+        delay = code['repeat_delay']
+    except KeyError:  # by default, repeat once only!
+        repeat = 1
+        delay = 0
+    # The table holds the on/off pairs
+    table = code['table']
+    pulses = []  # store the pulses here
+    # Read through each indexed element
+    for i in code['index']:
+        pulses += table[i]  # and add to the list of pulses
+    pulses.pop()  # remove one final 'low' pulse
+
+    for i in range(repeat):
+        pulse.send(array.array('H', pulses))
+        time.sleep(delay)
+    led.value = False
+    time.sleep(code['delay'])
+
+f.close()