wangchdo opened a new pull request, #17318: URL: https://github.com/apache/nuttx/pull/17318
## Summary This PR introduces a new architecture API: up_timer_trigger(), which allows triggering a timer interrupt instantly and safely. It resolves an issue where up_alarm_start() or up_alarm_tick_start() could start the timer earlier than the current alarm time, leading to an incorrect timeout value. This could cause the timer interrupt to occur much later than expected—only after the timer counter overflows to the wrong timeout. This API can be used to test system timer interrupt handling or to improve the watchdog implementation in tickless mode. ## Impact Introduce new API: up_timer_trigger(). No functional impact to existing NuttX features. ## Testing **ostest passed on board a2g-tc397-5v-tft** NuttShell (NSH) nsh> nsh> uname -a NuttX 0.0.0 4f398c2e65 Nov 12 2025 16:24:15 tricore a2g-tc397-5v-tft nsh> nsh> ostest (...) user_main: scheduler lock test sched_lock: Starting lowpri_thread at 97 sched_lock: Set lowpri_thread priority to 97 sched_lock: Starting highpri_thread at 98 sched_lock: Set highpri_thread priority to 98 sched_lock: Waiting... sched_lock: PASSED No pre-emption occurred while scheduler was locked. sched_lock: Starting lowpri_thread at 97 sched_lock: Set lowpri_thread priority to 97 sched_lock: Starting highpri_thread at 98 sched_lock: Set highpri_thread priority to 98 sched_lock: Waiting... sched_lock: PASSED No pre-emption occurred while scheduler was locked. sched_lock: Finished End of test memory usage: VARIABLE BEFORE AFTER ======== ======== ======== arena 28dfc 28dfc ordblks 7 6 mxordblk 1f8c8 1f8c8 uordblks 553c 553c fordblks 238c0 238c0 user_main: nxevent test End of test memory usage: VARIABLE BEFORE AFTER ======== ======== ======== arena 28dfc 28dfc ordblks 6 6 mxordblk 1f8c8 1f8c8 uordblks 553c 553c fordblks 238c0 238c0 Final memory usage: VARIABLE BEFORE AFTER ======== ======== ======== arena 28dfc 28dfc ordblks 1 6 mxordblk 24238 1f8c8 uordblks 4bc4 553c fordblks 24238 238c0 user_main: Exiting ostest_main: Exiting with status 0 nsh> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
