CAn we use “esp32-hal-timer.h” on platformio arduino platform for esp32s3?
Sure you can, but if you’re targeting the esp32-hal-timer.h version as found in Arduino-ESP32 3.x instead of 2.x, you will need to upgrade your platform.
Notice that using HAL timers directly that are also beign used by Arduino code or other arduino libraries is likely to be unpleasant.
If you’re reaching Arduino and using a timer directly that Arduino is already using, you’re just in for a bad time. I’d recommend using one development world or the other ot at least cracking open the code to both to be sure that you don’t get two different code bases each thinking that they own any peripheral.