def pm_task():
''' The power management task [internal function] '''
global requestedStandbyTime
global timeout
global disabled
if disabled:
return timeout
idleTime = virtualtimers.idle_time()
usbStayAwake = False
try:
import voltages
usbStayAwake = voltages.usb() > 2500 and machine.nvs_get_u8(
'system', 'usb_stay_awake')
except:
pass
if idleTime > 30000 and (not usbStayAwake):
global onSleepCallback
if not onSleepCallback == None:
print("[Power management] Running onSleepCallback...")
try:
onSleepCallback(idleTime)
except BaseException as e:
print("[ERROR] An error occurred in the on sleep callback.")
sys.print_exception(e)
system.sleep(idleTime, False)
return timeout
buttons.attach(buttons.BTN_A, toggleLeds)
def draw(vbatt, vusb):
display.drawFill(0x000000)
display.drawText(0, 0, "Battery")
display.drawText(0, 15, "USB")
display.drawText(50, 0, str(vbatt) + "v")
display.drawText(50, 15, str(vusb) + "v")
dataPoints.pop(0)
dataPoints.append(round(vbatt * 8))
for i in range(64):
display.drawPixel(i, display.height() - 1 - dataPoints[i], 0xFFFFFF)
dataPoints2.pop(0)
dataPoints2.append(round(vusb * 8))
for i in range(64):
display.drawPixel(64 + i,
display.height() - 1 - dataPoints2[i], 0xFFFFFF)
display.flush()
while True:
vbatt = voltages.battery() / 1000.0
vusb = voltages.usb() / 1000.0
draw(vbatt, vusb)
time.sleep(0.1)
def usb_attached():
try:
import voltages
return voltages.usb() > 4500
except:
return False