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@estranged42
Created Feb 12, 2018
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Problematic main.py that came with Adafruit Trinket M0
# Trinket IO demo
# Welcome to CircuitPython 2.0.0 :)
import board
from digitalio import DigitalInOut, Direction, Pull
from analogio import AnalogOut, AnalogIn
import touchio
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keycode import Keycode
import adafruit_dotstar as dotstar
import time
import neopixel
# One pixel connected internally!
dot = dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2)
# Built in red LED
led = DigitalInOut(board.D13)
led.direction = Direction.OUTPUT
# Analog input on D0
analog1in = AnalogIn(board.D0)
# Analog output on D1
aout = AnalogOut(board.D1)
# Digital input with pullup on D2
button = DigitalInOut(board.D2)
button.direction = Direction.INPUT
button.pull = Pull.UP
# Capacitive touch on D3
touch = touchio.TouchIn(board.D3)
# NeoPixel strip (of 16 LEDs) connected on D4
NUMPIXELS = 16
neopixels = neopixel.NeoPixel(board.D4, NUMPIXELS, brightness=0.2, auto_write=False)
# Used if we do HID output, see below
kbd = Keyboard()
######################### HELPERS ##############################
# Helper to convert analog input to voltage
def getVoltage(pin):
return (pin.value * 3.3) / 65536
# Helper to give us a nice color swirl
def wheel(pos):
# Input a value 0 to 255 to get a color value.
# The colours are a transition r - g - b - back to r.
if (pos < 0):
return [0, 0, 0]
if (pos > 255):
return [0, 0, 0]
if (pos < 85):
return [int(pos * 3), int(255 - (pos*3)), 0]
elif (pos < 170):
pos -= 85
return [int(255 - pos*3), 0, int(pos*3)]
else:
pos -= 170
return [0, int(pos*3), int(255 - pos*3)]
######################### MAIN LOOP ##############################
i = 0
while True:
# spin internal LED around! autoshow is on
dot[0] = wheel(i & 255)
# also make the neopixels swirl around
for p in range(NUMPIXELS):
idx = int ((p * 256 / NUMPIXELS) + i)
neopixels[p] = wheel(idx & 255)
neopixels.show()
# set analog output to 0-3.3V (0-65535 in increments)
aout.value = i * 256
# Read analog voltage on D0
print("D0: %0.2f" % getVoltage(analog1in))
# use D3 as capacitive touch to turn on internal LED
if touch.value:
print("D3 touched!")
led.value = touch.value
if not button.value:
print("Button on D2 pressed!")
# optional! uncomment below & save to have it sent a keypress
#kbd.press(Keycode.A)
#kbd.release_all()
i = (i+1) % 256 # run from 0 to 255
#time.sleep(0.01) # make bigger to slow down
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