how to set center-aligned PWM using davinci in RH850 P1H-C

The GTM of the P1x-C does not support the symmetrical/center aligned PWM. You have to calculate the set and clear timing in your software.

There not exists the direct way to generate center-aligned PWM in P1x-C series.

Though the GTM of the P1x-C does not support the configuration of symmetrical/center aligned PWM ,but we could set it in another way.

We could use belowed feature of GTM to generate a center- alighed PWM.

For example, we set ATOM0 Chn.0 to be a refenence channel ,the next 3 channels to be the PWM out channels.The reference channel ATOM0 Chn.0 must be configured as picture showes.(in SOMP mode)

I supposed you were in need of a three-phased PWM.Thus, the next 3 channels should be configured in opposite way.

CM0 and CM1 of ATOM0 Chn.1 - Chn.3  define the Duty of PWM, while the CN1 of ATOM0 Chn.0 defines the frequency of this PWM.

The final results act like the pic below.

thanks!

but i have not found GTM module in MCAL, so do I have to write my own code?

Firstly, if you do not find GTM module in MCAL ,please check your SIP to verify.

You could code manually in case there is no such module.

Firstly, if you do not find GTM module in MCAL ,please check your SIP to verify.

You could code manually in case there is no such module.