S32k3 PWM Capture Duty Cycle only works in IRQ

[noobsplzwin]

Hi NXP team,

I'm currently working on a project that involves capturing the PWM duty cycle on PTB3 using EMIOS0_CH9 on an S32K344 MCU. I've configured my project using S32 Configuration Tools (S32CT) and have attached my configuration and a piece of my code below for reference.

The issue I'm facing is that I can only read the duty cycle value in an interrupt request (IRQ). However, when I try to read it in a polling method (inside while(1) loop), I keep getting a duty cycle reading of 0.

Is it a requirement that the ICU for duty cycle must be called in an IRQ, or is there a way to successfully read the duty cycle value using polling?

Hardware - Custom S32k344 board
SDK - S32K3 Real-Time Drivers AUTOSAR R21-11 Version 3.0.0
PWM input frequency - 800 Hz

Thanks for any helps in advance.

Regards,

Connor

[Robin_Shen]

Hi

Please check the returned value of Emios_Icu_Ip_GetInputState before call Emios_Icu_Ip_GetDutyCycleValues.

Best Regards,
Robin
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