kopia lustrzana https://github.com/peterhinch/micropython-nano-gui
112 wiersze
3.2 KiB
Python
112 wiersze
3.2 KiB
Python
# asnano_sync.py Test/demo program for use of nanogui with asyncio
|
|
# Requires Pyboard for switch and LEDs.
|
|
# Tested with Adafruit ssd1351 OLED display.
|
|
|
|
# Copyright (c) 2020 Peter Hinch
|
|
# Released under the MIT License (MIT) - see LICENSE file
|
|
|
|
# Initialise hardware and framebuf before importing modules
|
|
from color_setup import ssd # Create a display instance
|
|
|
|
import asyncio
|
|
import pyb
|
|
import uos
|
|
from gui.core.writer import CWriter
|
|
from gui.core.nanogui import refresh
|
|
from gui.widgets.led import LED
|
|
from gui.widgets.meter import Meter
|
|
|
|
refresh(ssd, True)
|
|
|
|
# Fonts
|
|
import gui.fonts.arial10 as arial10
|
|
import gui.fonts.freesans20 as freesans20
|
|
|
|
from gui.core.colors import *
|
|
|
|
color = lambda v: RED if v > 0.7 else YELLOW if v > 0.5 else GREEN
|
|
txt = lambda v: "ovr" if v > 0.7 else "high" if v > 0.5 else "ok"
|
|
|
|
|
|
class MyMeter(Meter):
|
|
def __init__(self, x, text):
|
|
CWriter.set_textpos(ssd, 0, 0) # In case previous tests have altered it
|
|
wri = CWriter(ssd, arial10, GREEN, BLACK, verbose=False)
|
|
wri.set_clip(True, True, False)
|
|
super().__init__(
|
|
wri,
|
|
5,
|
|
x,
|
|
divisions=4,
|
|
ptcolor=YELLOW,
|
|
label=text,
|
|
style=Meter.BAR,
|
|
legends=("0.0", "0.5", "1.0"),
|
|
)
|
|
self.led = LED(wri, ssd.height - 16 - wri.height, x, bdcolor=YELLOW, label="over")
|
|
self.task = asyncio.create_task(self._run())
|
|
|
|
async def _run(self):
|
|
while True:
|
|
v = int.from_bytes(uos.urandom(3), "little") / 16777216
|
|
self.value(v, color(v))
|
|
self.led.color(color(v))
|
|
self.led.text(txt(v), fgcolor=color(v))
|
|
# Slow asynchronous data acquisition might occur here. Note
|
|
# that meters update themselves asynchronously (in a real
|
|
# application as data becomes available).
|
|
await asyncio.sleep(v) # Demo variable times
|
|
|
|
|
|
async def flash(n, t):
|
|
led = pyb.LED(n)
|
|
try:
|
|
while True:
|
|
led.toggle()
|
|
await asyncio.sleep_ms(t)
|
|
except asyncio.CancelledError:
|
|
led.off() # Demo tidying up on cancellation.
|
|
|
|
|
|
class Killer:
|
|
def __init__(self):
|
|
self.sw = pyb.Switch()
|
|
|
|
async def wait(self, t):
|
|
while t >= 0:
|
|
if self.sw():
|
|
return True
|
|
await asyncio.sleep_ms(50)
|
|
t -= 50
|
|
return False
|
|
|
|
|
|
# The main task instantiates other tasks then does the display update process.
|
|
async def main():
|
|
print("Press Pyboard usr button to stop test.")
|
|
# Asynchronously flash Pyboard LED's. Because we can.
|
|
leds = [asyncio.create_task(flash(1, 200)), asyncio.create_task(flash(2, 233))]
|
|
# Task for each meter and GUI LED
|
|
mtasks = [MyMeter(2, "left").task, MyMeter(50, "right").task, MyMeter(98, "bass").task]
|
|
k = Killer()
|
|
while True:
|
|
if await k.wait(800): # Switch was pressed
|
|
break
|
|
refresh(ssd)
|
|
for task in mtasks + leds:
|
|
task.cancel()
|
|
await asyncio.sleep_ms(0)
|
|
ssd.fill(0) # Clear display at end.
|
|
refresh(ssd)
|
|
|
|
|
|
def test():
|
|
try:
|
|
asyncio.run(main())
|
|
finally: # Reset asyncio case of KeyboardInterrupt
|
|
asyncio.new_event_loop()
|
|
print("asnano_sync.test() to re-run test.")
|
|
|
|
|
|
test()
|