topic S32144K FTM Timer 0 in S32 Design Studio

S32144K FTM Timer 0

amansinghaljpr — Thu, 14 Oct 2021 07:12:57 GMT

So we are trying to generate PWM on PC1 using FTM1 but the problem is , in the initial stage , the moment the code starts after resets we are getting a random pulse every single time . It almost feels like during the boot there is a very small pulse which is either coming out of the GPIO or out of the FTM which is triggering the GPIO . we have tried changing the different GPIO(channels) as well but same spike is coming.

This is affecting our PWM behavior , any recommendations on how to avoid this ?

Please refer to the pulse on Channel 2 in the attached image .

Re: S32144K FTM Timer 0

jiri_kral — Thu, 14 Oct 2021 07:41:53 GMT

Hi,

which particular pin are you using? In your app - are you first configuring FTM or GPIO? The peak occurs right after reset or during init (clock/ftm/gpio) phase?

Jiri

Re: S32144K FTM Timer 0

amansinghaljpr — Thu, 14 Oct 2021 08:46:45 GMT

We have tried

FTM1 Channel 0 - PTB2 , Channel 1 - PTA1

FTM3 Channel 0 - PTA2

And the peak is occurring right after the reset .