TMS320F28379D: Comparator subsystem problem

Part Number:TMS320F28379D

Dear all,

I have trouble with analog comparator module of F29379D. I have set the required registers and applied sin wave to positive pin of comparator. After that, I have connect negative input of the comparator to DAC. However, unfortunately, I could not observe a toggled output.

Here is the settings for comparator module;

        EALLOW;
        Cmpss1Regs.COMPLOCK.all = 0;
        Cmpss1Regs.COMPCTL.bit.COMPDACE = 1;        //comparator/DAC enable
        Cmpss1Regs.COMPCTL.bit.ASYNCHEN = 1;        //High comparator asynchronous path enable
        Cmpss1Regs.COMPCTL.bit.CTRIPOUTHSEL = 0;    //Asynchronous comp output drives CTRIPOUTH signal (to the outputxbar)
        Cmpss1Regs.COMPCTL.bit.CTRIPHSEL = 0;     //"             "      "      "    (to the epwm xbar)
        Cmpss1Regs.COMPCTL.bit.COMPHINV = 0;        //non-inverting output of comparator
        Cmpss1Regs.COMPCTL.bit.COMPHSOURCE = 0;     //negative input is connected to DAC register
        Cmpss1Regs.COMPHYSCTL.bit.COMPHYS = 0;      //no hysteresis
        Cmpss1Regs.COMPDACCTL.bit.SWLOADSEL = 0;    //load DAC value with system clock
        Cmpss1Regs.COMPDACCTL.bit.SELREF = 0;       //DAC reference selection, select VDDA
        Cmpss1Regs.COMPDACCTL.bit.DACSOURCE = 0;    //update the DAC from DACVAL register(or ramp generator)
        Cmpss1Regs.DACHVALS.bit.DACVAL = 100;       //the value which is loaded to DAC
        Cmpss1Regs.CTRIPHFILCTL.bit.FILINIT = 0;    //filter has no effect

        // Configure CTRIPOUTH output pin
        // Configure OUTPUTXBAR3 to be CTRIPOUT1H
        //
        OutputXbarRegs.OUTPUT3MUX0TO15CFG.bit.MUX0 = 0;
        //
        //Enable OUTPUTXBAR3 Mux for Output
        //
        OutputXbarRegs.OUTPUT3MUXENABLE.bit.MUX0 = 1;

        EDIS;

and the output pin configuration;

GpioCtrlRegs.GPAMUX1.bit.GPIO14 = 6;    //set GPIO14 pin as OUTPUTXBAR3

I could not understand what is the problem.

I will be waiting for your offer.

Regards;

Fahri