- For ESP32 | SPIRAM_MALLOC_ALWAYSINTERNAL=0
- Forced `esp_timer_create` to allocate resource from the internal memory
- WiFi/BT coexistence will sometimes arm/disarm timers from an ISR
where flash may be disabled. This can lead to a cache-based
exception as the timer instance will be located in the PSRAM.
Inadequate locking in the esp_timer component allowed corruption
of the s_timers linked list:
1. timer_armed(timer) returns false
2. another task arms the timer and adds it to s_timers
3. the list is locked
4. the timer is inserted into s_timers again
The last step results in a loop in the s_timers list, which causes
an infinite loop when iterated. This change always locks the
list before checking if the timer is already armed avoiding
the data race.
- Added an option to skip unhandled events for periodic timers. Useful for light sleep.
- Added doc about this case
- Added Test a latency between a call of callback and real event (14-16us). and UT to check skip_unhandled_events.
- Fixed for esp_timer_dump() if name of timer is NULL
- Refactored timer_process_alarm()
- Added the delete function after using in UTs
* Target components pull in xtensa component directly
* Use CPU HAL where applicable
* Remove unnecessary xtensa headers
* Compilation changes necessary to support non-xtensa gcc types (ie int32_t/uint32_t is no
longer signed/unsigned int).
Changes come from internal branch commit a6723fc
- Introduce system time function and concept of system time provider.
esp_timer is system time provider when present.
- Set the reference point for system time, g_startup_time.
- Use the system time functions in newlib instead of calling esp_timer
functions directly
