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Ticker and external interrupt
Topic last updated 30 Apr 2017, by 
stephenr.pit@....
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stephenr.pit@....
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Hi,
I have a robot with encoders on the wheels - which are set up as external interrupts - occurring randomly depending on whether the robot is moving - the function called simply adds 1 to a counter (very quick)
I also have a 1ms Ticker event which takes 300us to complete and it calculates various speed profile and control parameters.
I have an issue with the robot missing encoder pulses as I believe the Ticker event is blocking the external interrupts...is there a way to prioritise the external interrupt.
My thoughts are to use a line something like: NVIC_SetPriority(TIMER3_IRQn, 255);
Is this possible, or is there an alternative that may work?
Thank you in advance for your help,
Best Regards,
Stephen