TMS320F280025: Synchronization for ePWM

Songzhen Guo

Part Number: TMS320F280025

Hi expert，

When we configure the ePWM signal of F280025, we find it lack the synchronization signal. How to synchronize those three ePWM signal? Do we need to synchronize those three signal? We find that in F280049, it has synchronization bit for ePWM. Could you check it for us? Thanks.

F280025 TBCTL Register 4~5 bit

F280049 TBCTL Register 4~5 bit

Best Regards

Songzhen Guo

over 5 years ago

0 Nima Eskandari over 5 years ago

TI__Guru 52040 points

The synchronization scheme for this device is similar to F2838x. Any EPWM can be synchronized to any EPWM. You need to set the EPWMSYNIN mux while having the PHSEN bit set. Are you having problem setting the SYNCOUT or the SYNCIN?

Nima

0 fu zhenfei over 5 years ago in reply to Nima Eskandari

Prodigy 30 points

hi Nima：

thanks for reply；

I have another question，

I want to use EPWM1 to synchronize EPWM2 and EPWM3, so I need to configure

EPwm1Regs.EPWMSYNCOUTEN.all = 0x2;
EPwm2Regs.EPWMSYNCINSEL.all = 0x01;
EPwm3Regs.EPWMSYNCINSEL.all = 0x01;

How do I configure

EPwm1Regs.EPWMSYNCINSEL.all;
EPwm2Regs.EPWMSYNCOUTEN.all;
EPwm3Regs.EPWMSYNCOUTEN.all;

Looking forward to your reply, thank you

0 Nima Eskandari over 5 years ago in reply to fu zhenfei

TI__Guru 52040 points

You seem to have to it correctly.

for EPWM1 SYNCOUT you have selected: CTR=ZERO

For EPWM2 and EPWM3 you have SYNCIN as EPWM1 (0x1) based on the register definition of EPWMSYNCINSEL

0 fu zhenfei over 5 years ago in reply to Nima Eskandari

Prodigy 30 points

hi Nima：

thanks；

for EPWM1 SYNCOUT I have selected: CTR=ZERO，then I want to confirm that EPWM1 EPWMSYNCINSEL is configured to disable synchronization?

EPWM1.EPWMSYNCINSEL.SEL = 0;

I also want to confirm that EPWM2 and3 SYNCOUT is configured to be disabled?

EPwm2Regs.EPWMSYNCOUTEN.all = 0;
EPwm3Regs.EPWMSYNCOUTEN.all = 0;

Looking forward to your reply, thank you

0 Nima Eskandari over 5 years ago in reply to fu zhenfei

TI__Guru 52040 points

For EPWM1 disable the PHSEN.

Nima

0 fu zhenfei over 5 years ago in reply to Nima Eskandari

Prodigy 30 points

ok，thanks

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TMS320F280025: Synchronization for ePWM