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Why void HAL_SYSTICK_Callback(void) does not fire?

Question asked by mich.lei on May 28, 2017
Latest reply on May 29, 2017 by Clive One

I put this in the main.c before main(), it does not run. Google did not help. All though I did not read  all 1790 results.

volatile int oma2=0;
volatile uint16_t oma=0;
void HAL_SYSTICK_Callback(void)
{
  oma2++;
     if (oma2>100)
     {
          oma2=0;
          oma++;
     }
}

This stands in 746 Discovery BSP example. I was trying to do simple animation/testing LCD.

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