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TMS320F28377D: MEP not work properly if EPwm1Regs.CMPA.bit.CMPA = 1 or 2

Mauro Fantina
Genius 3800 points

Part Number: TMS320F28377D

Hello,

 

I run "hrpwm_duty_sfo_cpu01" example on "F2837x controlCARD"

and I acquire EPWM1A (HSEC49) with 4GS/s scope.

 

If I put 1 or 2 in "EPwm1Regs.CMPA.bit.CMPA" register

and I modify "EPwm1Regs.CMPA.bit.CMPAHR"

to see "fine positioning" I notice strange behaviour ...

 

If "EPwm1Regs.CMPA.bit.CMPA" is equal to 1

MEP seems doesn't work,

 

If "EPwm1Regs.CMPA.bit.CMPA" is equal to 2

I observe two pulse on EPWM1A,

here to screen shot ...