topic 回复： S32K144 LPIT timer is inaccurate in S32K

S32K144 LPIT timer is inaccurate

547416104 — Wed, 18 Jan 2023 07:51:36 GMT

Hello EveryOne,

I usd SDK to config the LPIT, and delay 100ms to send command to slave IC，but I find the time interval is inaccurate， it is more than 100ms. I check the timer task, no redundant code is running, whether need to do other configure for the lpit module?

thanks!

Re: S32K144 LPIT timer is inaccurate

Robin_Shen — Wed, 18 Jan 2023 09:34:26 GMT

Please toggle a GPIO in LPIT interrupt and measure the period by using oscilloscope. I try to modify the lpit_periodic_interrupt_s32k144 SDK example and able to get 1ms when input Timer period 1000.

Best Regards,
Robin
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回复： S32K144 LPIT timer is inaccurate

547416104 — Tue, 07 Feb 2023 02:13:13 GMT

The issue is fixed, timer is holded by ADC autocalibration active.