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"""
switch.py
=========
Light up some leds when the USR switch on the pyboard is pressed.
Example Usage::
Micro Python v1.0.1 on 2014-05-12; PYBv1.0 with STM32F405RG
Type "help()" for more information.
>>> import switch
>>> switch.run_loop()
Loop started.
Press Ctrl+C to break out of the loop.
"""
import pyb
switch = pyb.Switch()
red_led = pyb.LED(1)
green_led = pyb.LED(2)
orange_led = pyb.LED(3)
blue_led = pyb.LED(4)
all_leds = (red_led, green_led, orange_led, blue_led)
def run_loop(leds=all_leds):
"""
Start the loop.
:param `leds`: Which LEDs to light up upon switch press.
:type `leds`: sequence of LED objects
"""
print("Loop started.\nPress Ctrl+C to break out of the loop.")
while 1:
try:
if switch():
[led.on() for led in leds]
else:
[led.off() for led in leds]
except OSError: # VCPInterrupt # Ctrl+C in interpreter mode.
break
if __name__ == "__main__":
run_loop()
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