FILE: hrpwm_ex7_prd_updown_sfo_qformat.c
This example modifies the MEP control registers to show edge displacement for high-resolution period with ePWM in Up-Down count mode due to the HRPWM control extension of the respective ePWM module.
This example calls the following TI's MEP Scale Factor Optimizer (SFO) software library V8 functions:
int SFO();
- updates MEP_ScaleFactor dynamically when HRPWM is in use
- updates HRMSTEP register (exists only in EPwm1Regs register space) with MEP_ScaleFactor value
- returns 2 if error: MEP_ScaleFactor is greater than maximum value of 255 (Auto-conversion may not function properly under this condition)
- returns 1 when complete for the specified channel
- returns 0 if not complete for the specified channel
This example is intended to explain the HRPWM capabilities. The code can be optimized for code efficiency. Refer to TI's Digital power application examples and TI Digital Power Supply software libraries for details.
To run this example:
- Run this example at maximum SYSCLKOUT
- Activate Real time mode
- Run the code
External Connections
- Monitor ePWM1/2 A/B pins on an oscilloscope.
Watch Variables
- updateFine - Set to 1 use HRPWM capabilities and observe in fine MEP steps(default) Set to 0 to disable HRPWM capabilities and observe in coarse SYSCLKOUT cycle steps