Other Parts Discussed in Thread: TMS320F28035
Hi,
I'm using TMS320F28035 fixed-point 32-bit MCU.
In my project, the ePWMs are configured in Up-counting mode. They are the same fixed timebase period, but varying duty cycles. I have to update counter compare registers of two ePWMs as the result of my control loop.
They are supposed to be complementary.
The problem is that, if I update the counter-compare registers in CLA, they give identical results, which is wrong. (they must be complementary according to Action Qualifier)
So, for testing purpose, I added an EPWM ISR to my project, and in this ISR, it reads the result of the control loop from CLA, and updates CMPA, CMPB in EPWM_ISR. (note: No CMPA CMPB updating job in CLA anymore). And it works well.
I am wondering why it didn't work in CLA ?
I am aware of the CLA is floating-point. So, I have to convert the data to interger and then shift to the left for 16 bits.
I used to be able to update CMPA in CLA for another project, and it work fine.
I think the problem occured when CMPB got involed in this.
Hope someone can help me with this,
Thank you.
