Configuring LPTMR0 on MCXA153

Question

I am trying to configure LPTMR0 for a 1-second interval. I followed the lptmr example in the SDK examples to configure my timer. The interval at which the interrupt is generated never correct. 
 
 Here are the steps I followed:

Configure the LPTMR0 clock source to 96MHz with a divider of 16. The clock frequency for LPTMR0 is 6MHz. 
 After code generation, I set the timer count to 6,000,000 for 1 second interval. 
 
 I confirmed that the timer is a 32 bit timer. The timer does work but the interval duration is not 1 second. It is something else. 
 Did I skip a step in configuring the timer?

balajivan1995 · Accepted Answer

If you want an accurate 1s interrupt, use utick component with 1mhz clock source in repeating mode. 
 If you don't want to use another clock source and fine with few ms lapse, you can use systick. 
 You can refer this link for how to use systick as reference time. 
 community.element14.com/.../231676

Configuring LPTMR0 on MCXA153

Top Replies