Clock overflow handling

Carvalhedo

Hello,

I'm implementing a millisecond counter using reg_system_tick on the TLSR8251.
The timer overflows every ~268 seconds (268000ms) due to its limited range.

Currently, I detect overflow in software by comparing consecutive readings:
- If (current_value < previous_value) → overflow occurred

However, I'm wondering if there's a more efficient approach using hardware
interrupts. Specifically:

1. Can I configure a timer (TIMER0?) to generate an interrupt just before
   reg_system_tick overflows?

2. What's the recommended approach for maintaining a long-running millisecond
   counter on TLSR8251?

3. Are there any SDK examples for handling system tick overflow?

My current implementation works but has overhead on every millis_get() call.
I'd prefer an interrupt-driven approach if the hardware supports it.

Thank you!

TL_JIAWEI

You can refer to the following code to implement a timer interrupt, thereby achieving long-term timing.
https://gitee.com/telink-semi/tc ... or/TIMER_Demo/app.c