TMDSCNCD28388D: EPWM module doesn't trigger ADC SOC with DeviceSupport added in sysconfig.

Hi Furkan,

The expert is currently out of office today due to US holiday. Please expect a delay in response.

Best Regards,

Aishwarya

Hi Furkan,

Thanks for your patience.

What version of C2000ware and CCS are you using?

Regards,

Hadi

Hi Hadi,

I am using code composer studio v12.8 with c2000ware 5.03.

Furkan,

Did you get any error when you build your project in CCS?

what usually happens is that there would be errors regarding having duplicate file in the project after enabling "Device Support".

Hi Hadi,

I didn't get any error.

The code compiles without errors, and the LED is controllable, yet the EPWM module remains non-functional.

Hi Furkan,

Sorry I'm confused here. Did you get your application running without "Device Support"?

Can you change the EPWMCLKDIV in your clocktree and check if the associated field value in PERCLKDIVSEL Register has changed or not?

Hello Hadi,

Let me explain the issue. I opened a blank project using Resource Explorer. After that, I excluded the device folder and the cmd files within the project files in order to use the internal oscillator. Then, I configured the internal oscillator settings in the clock tree using Sysconfig. To make the clock tree settings effective, I added device support. Finally, I added a cmd file with the default settings. Since I wanted to use EPWM, I added the EPWM module as well. I wrote my program in the main.c file. However, when I ran the program, I noticed that the EPWM module was not working.

To investigate why this might be happening, I looked at one of the example projects in Resource Explorer. I saw that device support was not being used in the example projects. Following the example, I removed the previously added device support from Sysconfig and re-included the device folder from the project files into my project. I know that as a result of this, the clock tree settings I made will be invalid. I did not change the EPWM settings in Sysconfig, nor did I change the cmd settings; I only removed device support and re-included the device folder. When I ran the program again, I noticed that the EPWM module was working.

As a result, I realized that if I include device support in my project (I even tested this with the default clock tree settings), the EPWM module doesn't work. I don’t receive any warnings or errors in CCS.

What should I do to enable epwm module? I didn't change anything except adding device support, adding cmd, adding adc and adding epwm. I didn't change sysctl or any other topics.

Furkan,

Thanks for thorough explanation. 

Please add "device support" and "CMD" , and check if you change the EPWMCLKDIV in your clocktree, the associated field value in PERCLKDIVSEL Register has changed or not?

Hello Hadi,

I can adjust the EPWMCLKDIV to /1 in the clock tree.

I have reviewed the PERCLKDIVSEL:

PERCLKDIVSEL has been set to 0.

Furkan,

Thanks for sharing the test result with me.

I recommend to use the following function directly in your main() after initialization:

SysCtl_setEPWMClockDivider(SYSCTL_EPWMCLK_DIV_2);

Meanwhile, I will raise this as a clocktree bug. Hopefully it'll be fixed in next version.

Regards,

Hadi