Hi, I'm having a problem understanding what is happening when it comes to detecting when an ISR has changed a global variable. I wrote the little program below and I'm seeing some different behaviors. Of the four test functions below only number two works as desired. The others appear to be hang…

Interrupts and Global Variable Access

vaj4088 August 25, 2016, 10:26pm 6

...and of course counter and the flag MUST be declared volatile.

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