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Blackberry Trackball (ICSH044A) driver for Adafruit QtPY/Raspberry Pico. See https://developer.run/63 for context
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# Need to install adafruit_debouncer an adafruit_hid | |
import digitalio | |
import board | |
import time | |
import usb_hid | |
from adafruit_debouncer import Debouncer | |
from adafruit_hid.mouse import Mouse | |
import time | |
def setup(pin): | |
inp = digitalio.DigitalInOut(pin) | |
inp.direction = digitalio.Direction.INPUT | |
inp.pull = digitalio.Pull.UP | |
return Debouncer(inp, interval=0.0001) | |
step = 4 | |
smooth = 8 | |
accel = 2 | |
max_accel = 5 | |
def move(last): | |
now = time.time() | |
multiplier = max_accel+1+max(last-now,-max_accel) | |
return multiplier*accel*step, now | |
mouse = Mouse(usb_hid.devices) | |
# Raspberry Pico | |
# up = setup(board.GP3) | |
# down = setup(board.GP2) | |
# left = setup(board.GP4) | |
# right = setup(board.GP5) | |
# Adafruit QtPY | |
up = setup(board.A0) | |
down = setup(board.A1) | |
left = setup(board.A2) | |
right = setup(board.A3) | |
up_upd = time.time() | |
down_upd = time.time() | |
left_upd = time.time() | |
right_upd = time.time() | |
x=0 | |
y=0 | |
while True: | |
up.update() | |
if up.fell: | |
mv,up_upd=move(up_upd) | |
if y>0: | |
y=-mv | |
else: | |
y-=mv | |
else: | |
down.update() | |
if down.fell: | |
mv,down_upd=move(down_upd) | |
if y<0: | |
y=mv | |
else: | |
y+=mv | |
left.update() | |
if left.fell: | |
mv,left_upd=move(left_upd) | |
if x<0: | |
x=mv | |
else: | |
x+=mv | |
else: | |
right.update() | |
if right.fell: | |
mv,right_upd=move(right_upd) | |
if x>0: | |
x=-mv | |
else: | |
x-=mv | |
mvx = 0 | |
mvy = 0 | |
if (x>0): | |
x=max(0, x-smooth) | |
mvx = smooth | |
elif (x<0): | |
x=min(0, x+smooth) | |
mvx = -smooth | |
if (y>0): | |
y=max(0, y-smooth) | |
mvy = smooth | |
elif (y<0): | |
y=min(0,y+smooth) | |
mvy = -smooth | |
if not mvx == 0 or not mvy == 0: | |
mouse.move(x=mvx, y=mvy) | |
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