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 meter(n, x, text, t):
print('Meter {} test.'.format(n))
m = Meter(wri, 5, x, divisions = 4, ptcolor=YELLOW,
label=text, style=Meter.BAR, legends=('0.0', '0.5', '1.0'))
l = LED(wri, ssd.height - 16 - wri.height, x, bdcolor=YELLOW, label ='over')
while True:
v = int.from_bytes(uos.urandom(3),'little')/16777216
m.value(v, color(v))
l.color(color(v))
l.text(txt(v), fgcolor=color(v))
refresh(ssd)
await asyncio.sleep_ms(t)
def meter():
print('meter')
refresh(ssd, True) # Clear any prior image
m = Meter(wri, 5, 2, height = 45, divisions = 4, ptcolor=YELLOW,
label='level', style=Meter.BAR, legends=('0.0', '0.5', '1.0'))
l = LED(wri, 5, 40, bdcolor=YELLOW, label ='over')
steps = 10
for _ in range(steps):
v = int.from_bytes(uos.urandom(3),'little')/16777216
m.value(v)
l.color(GREEN if v < 0.5 else RED)
refresh(ssd)
utime.sleep(1)
refresh(ssd)
def meter():
print('Meter test.')
refresh(ssd, True) # Clear any prior image
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'
m0 = Meter(wri,
5,
2,
divisions=4,
ptcolor=YELLOW,
label='left',
style=Meter.BAR,
legends=('0.0', '0.5', '1.0'))
l0 = LED(wri,
ssd.height - 16 - wri.height,
2,
bdcolor=YELLOW,
label='over')
m1 = Meter(wri,
5,
50,
divisions=4,
ptcolor=YELLOW,
label='right',
style=Meter.BAR,
legends=('0.0', '0.5', '1.0'))
l1 = LED(wri,
ssd.height - 16 - wri.height,
50,
bdcolor=YELLOW,
label='over')
m2 = Meter(wri,
5,
98,
divisions=4,
ptcolor=YELLOW,
label='bass',
style=Meter.BAR,
legends=('0.0', '0.5', '1.0'))
l2 = LED(wri,
ssd.height - 16 - wri.height,
98,
bdcolor=YELLOW,
label='over')
steps = 10
for n in range(steps):
v = int.from_bytes(uos.urandom(3), 'little') / 16777216
m0.value(v, color(v))
l0.color(color(v))
l0.text(txt(v), fgcolor=color(v))
v = n / steps
m1.value(v, color(v))
l1.color(color(v))
l1.text(txt(v), fgcolor=color(v))
v = 1 - n / steps
m2.value(v, color(v))
l2.color(color(v))
l2.text(txt(v), fgcolor=color(v))
refresh(ssd)
utime.sleep(1)