topic Issue With PWM input and Output in S32K

Issue With PWM input and Output

chaitanya_kalyani — Mon, 22 Mar 2021 14:15:22 GMT

Hello,

I want PWM output as well as PWM input but facing issue.

When I add ftm_pwm module and after configuration pwm is working but after adding ftm_ic module getting issue. PWM Output is not getting updated.

Also need a sample program to read the PWM (PWM input capture compare) signal need to use for encoder.

Thank you in advance.

Re: Issue With PWM input and Output

PetrS — Tue, 23 Mar 2021 13:04:01 GMT

Hi,

there is "ftm_signal_measurement" demo example within S32DS SDK. This shows usage of ftm_pwm and ftm_ic modules.

BR, Petr

Re: Issue With PWM input and Output

chaitanya_kalyani — Mon, 29 Mar 2021 06:15:05 GMT

Hello @PetrS ,

Currently I checked for PWM output. PWM example is working fine (ftm_pwm_s32k142) but when I copy the same configuration in my project then it is not working. PWM is not getting updated it is taking default assigned value only.

Is it issue with PWM clock? In my project CAN, Timer, Watchdog, ADC and Power manager modules are used.

If it is issue with clock then how to increase the PWM clock.

I am getting 28000 as max frequency for PWM.

Re: Issue With PWM input and Output

PetrS — Mon, 29 Mar 2021 12:30:59 GMT

Hi,

what is setting in Initialization tab?
What function and parameters do you use for duty cycle update? What is a returned value?

BR, Petr

Re: Issue With PWM input and Output

chaitanya_kalyani — Mon, 29 Mar 2021 12:35:41 GMT

Hello @PetrS

Thank you for quick response.

Below is my settings

Re: Issue With PWM input and Output

PetrS — Tue, 30 Mar 2021 10:24:40 GMT

I do not see issue within setting.

BR, Petr

Re: Issue With PWM input and Output

chaitanya_kalyani — Tue, 30 Mar 2021 10:50:19 GMT

Hello @PetrS ,

Then what can I do it?

I am working on urgent project and I require PWM input as well as output.

Other functionality are working fine there is no issue with other functionality.

Re: Issue With PWM input and Output

chaitanya_kalyani — Wed, 31 Mar 2021 06:13:49 GMT

Hello @PetrS ,

After debugging I got to know when I use LPIT module then getting problem for PWM. If I don't use LPIT module then there is no issue with PWM module.

Quick response highly appreciated.

Re: Issue With PWM input and Output

PetrS — Thu, 08 Apr 2021 11:43:46 GMT

Hi,

maybe PIT interrupt prevents executing of other interrupt or similar.
Try to modify interrupt priorities for modules, using INT_SYS_SetPriority.

BR, Petr