now in my project i use CLA, but i have a prolem, i use PWM7 TBCTR=CMPB as CLA trigger, and i can go into the CLA code to run , but i find all PWMx.TBPRD=0xFFFF (initial value is not 0xFFFF)
so i try to find the reason through step debug, and i find when step over "EPwm7Regs.ETSEL.bit.INTEN = TRUE; " and the all PWMx.TBPRD=0xFFFF
this is my PWM7 trigger initial code: what's the reason?? thank you!
/**************************************************************************************/
// EPWM Module 7 config: For ISR and ADC trigger
EPwm7Regs.TBPRD = PWM_INTPRD; //20160121 change to 45k Isr frequency!!
EPwm7Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count up/dn
EPwm7Regs.TBCTL.bit.PHSEN = TB_ENABLE; // Slave module
EPwm7Regs.TBCTL.bit.PHSDIR = TB_UP;
EPwm7Regs.TBCTL.bit.PRDLD = TB_SHADOW;
EPwm7Regs.TBPHS.bit.TBPHS = 2;
EPwm7Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_DISABLE; // disable sync out
//TBCLK=SYSCLKOUT/(HSPCLKDIV * CLKDIV)=SYSCLKOUT
EPwm7Regs.TBCTL.bit.CLKDIV = TB_DIV1; //Timebase clock pre-scale
EPwm7Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1; //High speed time pre-scale
EPwm7Regs.CMPB.bit.CMPB = INT_CMPB;
EPwm7Regs.ETSEL.bit.INTSEL = ET_CTRU_CMPB;
EPwm7Regs.ETSEL.bit.INTEN = 0; // Disable INT
EPwm7Regs.ETPS.bit.INTPRD = ET_1ST; // Generate INT on 1st event
EPwm7Regs.ETCLR.all = 0x000F ; //clear all ETFLAG
