Part Number: TMS320F280049
Other Parts Discussed in Thread: C2000WARE
Hi experts,
My customer use the manual convert mode. The wave seems strange as below:
If they change to auto-convert mode. The wave is right:
Please help review the codes. Thank you in advance!
for(;;)
{
//
// Sweep DutyFine
//
fPWMperiod = PWM_CLOCK_FREQ/fPWMFreqtest/2.0f;/*1.5MHz*/
#if 1
for(periodFine = MIN_HRPWM_PRD_PERCENT; periodFine < 0.9; periodFine += 0.01)
{
DEVICE_DELAY_US(1000);
count = (((uint16_t)EPWM_TIMER_TBPRD) << 8UL) + (float32_t)(periodFine * 256);
compCount = count;
HRPWM_setTimeBasePeriod(ePWM[1], compCount);
//
// Call the scale factor optimizer lib function SFO()
// periodically to track for any change due to temp/voltage.
// This function generates MEP_ScaleFactor by running the
// MEP calibration module in the HRPWM logic. This scale
// factor can be used for all HRPWM channels. The SFO()
// function also updates the HRMSTEP register with the
// scale factor value.
//
status = SFO(); // in background, MEP calibration module
// continuously updates MEP_ScaleFactor
if (status == SFO_ERROR)
{
error(); // SFO function returns 2 if an error occurs & #
// of MEP steps/coarse step
} // exceeds maximum of 255.
}
#else
fPWMperiodFrac = fPWMperiod - (uint16_t)(fPWMperiod);
//float32_t count = (((uint16_t)EPWM_TIMER_TBPRD-1) << 8UL) + (float32_t)(periodFine * 256);
//uint32_t compCount = count;
//HRPWM_setTimeBasePeriod(ePWM[1], compCount);
count = (uint16_t)(fPWMperiodFrac*256*56+128)>>8;
//count = 0;
compCount = (((uint16_t)fPWMperiod) << 8UL) + count;
HRPWM_setTimeBasePeriod(EPWM1_BASE, compCount);
//EPwm1Regs.TBPRD = (uint16_t)(fPWMperiod);
//EPwm1Regs.TBPRDHR = (uint16_t)count<<8;
status = SFO(); // in background, MEP calibration module
// continuously updates MEP_ScaleFactor
if (status == SFO_ERROR)
{
error(); // SFO function returns 2 if an error occurs & # // of MEP steps/coarse step
}
#endif
}
