RTOS/CC2650: Synchronize two PWM outputs

Yoram Grinberg

Prodigy 240 points

Part Number: CC2650
Other Parts Discussed in Thread: DRV8872

Tool/software: TI-RTOS

I need to output two synchronized PWM signals to drive a DRV8872 H-bridge motor driver.

The latest TI-RTOS drivers I've installed (tirtos_cc13xx_cc26xx_2_21_00_06) do not support this.

From the doc:

Limitations

The PWM output can currently not be synchronized with other PWM outputs

As far as I understand, the hardware supports timers synchronization.

What would be the best way to add such support to the driver?

over 9 years ago

0 Gerardo Gomez Martinez over 9 years ago

TI__Expert 5825 points

Hi Yoram,

Yes that driver doesn’t support PWM output being synchronized. If you want to look into adding this yourself a good place to start may be the TimerSynchronize function found in driverlib’s timer.h, that may give you the functionality you need.
http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/tirtos/2_21_00_06/exports/tirtos_full_2_21_00_06/products/cc26xxware_2_24_03_17272/doc/driverlib/group__timer__api.html#ga500a3da944eae8ffd434f449fc59e9e9

Thanks,
Gerardo

0 Kenia Guinto over 9 years ago in reply to Gerardo Gomez Martinez

TI__Expert 7250 points

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RTOS/CC2650: Synchronize two PWM outputs