Part Number: TMS320F28379D
Other Parts Discussed in Thread: C2000WARE
I'm looking to generate an ePWM signal that synchronizes with a square wave received from the ADC pin. Specifically, I aim to generate the PWM signal at the rising edge of the square wave received at the ADC pin. Could someone assist me in achieving this with the necessary code? I am utilizing the TMS320F28379D LaunchPad.
Thank You.
Hi Subhajit,
You can synchronize your PWM module with an external signal by routing in the signal using INPUT XBAR and choosing an external sync signal as the sync source of your PWM (e.g. EXTSYNCIN1). So you can plan to route the sync signal from a GPIO to EXTSYNCIN1 via INPUTXBAR5. This is also further described in the device TRM:
In this way, the rising edge of your external signal would sync the EPWM module's counter to whatever you set as the TBPHS value.
We have many examples within C2000Ware ({C2000Ware}\driverlib\f2837xd\examples\cpu1\epwm and {C2000Ware}\device_support\f2837xd\examples\cpu1). To use as a starting point and reference. Just be sure to set up INPUTXBAR for the source, enable phase shifting, set a TBPHS value.
There is also a CCS example attached in an older post that showcases using GPIO32 as an external sync source through INPUTXBAR5:
Best Regards,
Allison
