openmv/scripts/examples/02-Board-Control/timer_control.py
iabdalkader f04b18fe6f Update examples.
* Add Arduino UART example.
* Update Arduino SPI example to use callbacks.
* Remove printf from timer_control.py callback.
* Add PWM channel 3 and servo 3 to pwm and servo examples.
2019-09-30 17:17:44 +02:00

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Python

# Timer Control Example
#
# This example shows how to use a timer for callbacks.
import time
from pyb import Pin, Timer, LED
blue_led = LED(3)
# we will receive the timer object when being called
# Note: functions that allocate memory are Not allowed in callbacks
def tick(timer):
blue_led.toggle()
tim = Timer(4, freq=1) # create a timer object using timer 4 - trigger at 1Hz
tim.callback(tick) # set the callback to our tick function
while (True):
time.sleep(1000)