[FAQ] C2000 HRPWM (High-Resolution PWM): Frequently Asked Questions

Note: This page is still in progress. More FAQs/information will be added as they are created. This FAQ list applies to devices with HRPWM.  Refer to: C2000 Device Peripherals Guide for a list of devices and their peripherals

Many questions can be answered by referencing existing resources:

• Getting started with ePWM and HRPWM? See the C28x and C29x Academies here.
• Looking for EPWM/HRPWM timing requirements? See your device datasheet, which contains the PWM and HRPWM timing specifications, including MEP resolution. 
• For in-depth descriptions and examples, see your device Technical Reference Manual (TRM) ePWM and HRPWM sections.
• Use the SysConfig GUI in development to help display errors and warnings of incompatible EPWM/HRPWM settings.

Examples and libraries:

• HRPWM DriverLib examples: C2000Ware_<version>\driverlib\<device>\examples\...\hrpwm
• HRPWM SFO libraries: C2000Ware_<version>\libraries\calibration\hrpwm\<device>

HRPWM FAQs are listed below:

• [FAQ] Why is my high resolution (HR) PWM signal not working correctly? (General debug tips)
• [FAQ] HRPWM in Up/Down counter mode will only load user CMP shadow registers on CTR=ZERO

Here are some other helpful previous E2E questions:

• HRPWM phase loading problem
• High resolution on CMPA AND CMPB