TMS570LS1227: TMS570LS1227

Yaparla Venkata Akhil Kumar Reddy

Part Number: TMS570LS1227
Other Parts Discussed in Thread: HALCOGEN, AWR1642

Hi.team,

Iam using TMS570ls1227 pwm driver code for the first time, in these driver code i have to change the duty cycle during the run time

can u please give me the solution for this??

Thanks

Akhil

over 1 year ago

0 QJ Wang over 1 year ago

TI__Guru**** 186196 points

Hi Akhil,

TMS570LS12x platforms do have dedicated ePWM module, and the N2HET can also be used to generate PWM signals at N2HET pins. Which module do you use for PWM?

For using N2HET, you can use the API generated by HALCoGen to update the duty-cycle and period:

pwmSetDuty(hetRAMBASE_t * hetRAM, uint32 pwm, uint32 pwmDuty)

For ePWM, there is no API, but you can write to etpwmREGx->CMPA and etpwmREGx->CMPA to change the duty cycle of PWMA and PWMB.

0 Yaparla Venkata Akhil Kumar Reddy over 1 year ago in reply to QJ Wang

Prodigy 250 points

Hi..QJ wang

iam using the AWR1642 module, in this we have a epwm module

we have downloaded the etpwm driver from hercules. In these driver how to change the dutycycle during run time??

Thanks

Akhil

0 QJ Wang over 1 year ago in reply to Yaparla Venkata Akhil Kumar Reddy

TI__Guru**** 186196 points

Hi Akhil,

There is no API to modify the dutycycle of PWM signals. You need to program etpwmREGx->CMPA and etpwmREGx->CMPA to change the duty cycle of PWMA and PWMB manually.

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TMS570LS1227: TMS570LS1227