TMS320F28379D: How to generate square wave signals from ePWM modules

Hi Van,

Welcome to the C2000 Forum!

VAN NGUYEN said:

What is the function of register PCLKCR0 and PCLKCR1 in CPU_SYS_REGS Registers?

The PCLKCR0 and PCLKCR1 are part of a series of registers that control the peripheral clocks going to the modules described within those registers. For example bit 3 of PCLKCR0 is for CPUTimer0. Both CPU1 and CPU2 each have a timer 0 module. If this bit is set then the module clock is turned-on, if it is not set then the module clock is off. This is a configurable option on each CPU.

VAN NGUYEN said:

How can I configure clocks and generate squarewave signals at 85kHz from ePWM modules?

I would suggest starting off with an example and going from there. Our software platform, C2000Ware, has examples for the epwm module for the F28379D device. These examples are in a bit-field format and in driverlib (path to both sets of examples are below, which you decide to go with is personal preference). 

C:\ti\c2000\C2000Ware_version\device_support\f2837xd\examples\cpu1

C:\ti\c2000\C2000Ware_version\driverlib\f2837xd\examples\cpu1\epwm

The frequency your output signals are configured to will depend on your count mode. I would suggest looking at the Time-Base (TB) submodule section of the technical reference module (TRM) for more information on this.

If your new to C2000, I would also suggest taking a look at the C2000 F2837xD Microcontroller Workshop 

Best Regards,

Marlyn