embedded performance_error ai_generated true

Timer: interrupt handler not completing before next period

ID: embedded/timer-interrupt-overrun

Also available as: JSON · Markdown
78%Fix Rate
82%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
32 active — — —

Root Cause

Timer ISR taking longer than timer period.

generic

Workarounds

  1. 90% success Optimize ISR: set flag only, do work in main loop or DFS task
  2. 85% success Profile ISR execution time with GPIO toggle and oscilloscope

Dead Ends

Common approaches that don't work:

  1. Increase timer period 72% fail

    Reduces control loop frequency

  2. Remove all code from ISR 78% fail

    No interrupt functionality