Hello:
I’m new to OpenMV and I’m just starting to get familiar with it. I modified the example Timer code.
# Timer Control Example
#
# This example shows how to use a timer for callbacks.
import time
from pyb import Pin, Timer
def tick(timer): # we will receive the timer object when being called
print(timer.counter()) # show current timer's counter value
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)
The callback works fine but the printed value is always zero. What am I doing wrong?
I tried changing the freq and prescaler and I can see it count down. I though default was count up. Is there any other documentation on how this counter works?
I’m very familiar with STM32FXXX counters - just not clear on how it is implemented through OpenMV.