Here is what we read in the last paragraph in SPRUH22C–April 2012–Revised February 2013 page 817.
In SFO_TI_Build_V7.lib, the SFO() function also updates the HRMSTEP register with the scale factor
result. If the HRCNFG[AUTOCONV] bit is set, the application software is responsible only for setting
CMPAHR = fraction(PWMduty*PWMperiod)<<8 or CMPBHR = fraction(PWMduty*PWMperiod)<<8 or
TBPRDHR = fraction (PWMperiod) while running SFO() in the background. The MEP Calibration
Module will then use the values in the HRMSTEP and CMPAHR/CMPBHR/TBPRDHR register to
automatically calculate the appropriate number of MEP steps represented by the fractional duty cycle
or period and move the high-resolution ePWM signal edge accordingly. In SFO_TI_Build_V7.lib, the
SFO() function does not automatically update the HRMSTEP register. Therefore, after the SFO
function completes, the application software must write MEP_ScaleFactor to the HRMSTEP register
(EALLOW-protected).
The last and the first sentence are contradictory.
Which one is true?
Best regards
