TMS320F280025 模数转换器(ADC)

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CMPSS框图

所谓比较器，正端输入大于负端输入时，输出高；正端输入小于负端输入时，输出低
负端输入通过设置寄存器可选则对应接口，或者内部参考
内部参考可选择是DACHVALS还是斜坡发生器
内部参考电压VDDA或VDAC
负端输入电压为： 内部参考电压 * DACHVALS / 4096
比较器输出可以直接作为CMPSS输出输出，也可以进行滤波/同步再输出
CMPSS模块只是输出一个高或低的信号，这个信号都是通过XBAR模块传输到其他外设的

比较器参考

内部参考电压VDDA或VDAC
负端输入电压为： 内部参考电压 * DACHVALS / 4096

斜坡发生器

斜坡发送器能让我们的比较器负端输入递减，实现特定需求的功能

滤波器

滤波器其实就是if else功能

比较器应用

CMPSSDriver.c

/*
 * CMPSSDriver.c
 *
 *  Created on: 2024年8月13日
 *      Author: Paranoid
 */
#include "main.h"



void CMPSS1Driver_Init(void)
{
   
    EALLOW;
    //
    // Analog PinMux for A2/C9
    // AIO -> Analog mode selected
    GpioCtrlRegs.GPHGMUX1.bit.GPIO224 = 0;
    GpioCtrlRegs.GPHMUX1.bit.GPIO224 = 0;
    GpioCtrlRegs.GPHINV.bit.GPIO224 = 0;
    GpioCtrlRegs.GPHAMSEL.bit.GPIO224 = 1;
    EDIS;


    EALLOW;
    //
    // Select the value for CMP1HPMXSEL./Select the value for CMP1LPMXSEL.
    //

    AnalogSubsysRegs.CMPHPMXSEL.bit.CMP1HPMXSEL = 0;
    AnalogSubsysRegs.CMPLPMXSEL.bit.CMP1LPMXSEL = 0;
    EDIS;

    EALLOW;
    //
    // Sets the configuration for the high comparator.
    // Sets the configuration for the low comparator.

    Cmpss1Regs.COMPCTL.bit.COMPHSOURCE = 0;
    Cmpss1Regs.COMPCTL.bit.COMPHINV = 0;
    Cmpss1Regs.COMPCTL.bit.ASYNCHEN = 0;
    Cmpss1Regs.COMPCTL.bit.COMPLSOURCE = 0;
    Cmpss1Regs.COMPCTL.bit.COMPLINV = 0;
    Cmpss1Regs.COMPCTL.bit.ASYNCLEN = 0;
    EDIS;

    //
    // Sets the configuration for the internal comparator DACs.
    EALLOW;
    Cmpss1Regs.COMPDACCTL.bit.SWLOADSEL = 0;
    Cmpss1Regs.COMPDACCTL.bit.SELREF = 0;
    Cmpss1Regs.COMPDACCTL.bit.DACSOURCE = 0;
    EDIS;

    //
    // Sets the value of the internal DAC of the high comparator.
    //Sets the value of the internal DAC of the low comparator.
    EALLOW;
    Cmpss1Regs.DACHVALS.bit.DACVAL = 2048U;
    Cmpss1Regs.DACLVALS.bit.DACVAL = 0U;
    EDIS;

    //
    //  Configures the digital filter of the high comparator.
    //
    EALLOW;
    Cmpss1Regs.CTRIPHFILCTL.bit.SAMPWIN = 0;
    Cmpss1Regs.CTRIPHFILCTL.bit.THRESH = 0;
    Cmpss1Regs.CTRIPHFILCLKCTL.bit.CLKPRESCALE = 0;
    EDIS;

    //
    // Configures the digital filter of the low comparator.
    //
    EALLOW;
    Cmpss1Regs.CTRIPLFILCTL.bit.SAMPWIN = 0;
    Cmpss1Regs.CTRIPLFILCTL.bit.THRESH = 0;
    Cmpss1Regs.CTRIPLFILCLKCTL.bit.CLKPRESCALE = 0;
    EDIS;

    //
    // Sets the output signal configuration for the high comparator.
    //
    EALLOW;
    Cmpss1Regs.COMPCTL.bit.CTRIPOUTHSEL = 0;
    Cmpss1Regs.COMPCTL.bit.CTRIPHSEL = 0;
    EDIS;

    //
    // Sets the output signal configuration for the low comparator.
    //
    Cmpss1Regs.COMPCTL.bit.CTRIPOUTLSEL = 0;
    Cmpss1Regs.COMPCTL.bit.CTRIPLSEL = 0;
    EDIS;

    //
    // Sets the comparator hysteresis settings.
    //
    EALLOW;
    Cmpss1Regs.COMPHYSCTL.bit.COMPHYS = 0U;
    EDIS;

    //
    // Configures the comparator subsystem's ramp generator.
    //
    EALLOW;
    Cmpss1Regs.COMPDACCTL.bit.RAMPSOURCE = 0;
    Cmpss1Regs.COMPDACCTL.bit.RAMPLOADSEL = 1;
    Cmpss1Regs.RAMPMAXREFS = 0;
    Cmpss1Regs.RAMPDECVALS = 0;
    Cmpss1Regs.RAMPDLYS.bit.DELAY = 0;
    EDIS;

    //
    // Disables reset of HIGH comparator digital filter output latch on PWMSYNC
    // Disables reset of LOW comparator digital filter output latch on PWMSYNC
    EALLOW;
    Cmpss1Regs.COMPSTSCLR.bit.HSYNCCLREN = 0;
    Cmpss1Regs.COMPSTSCLR.bit.LSYNCCLREN = 0;
    EDIS;

    //
    // Sets the ePWM module blanking signal that holds trip in reset.
    // Disables an ePWM blanking signal from holding trip in reset.
    EALLOW;
    Cmpss1Regs.COMPDACCTL.bit.BLANKSOURCE = 0;
    Cmpss1Regs.COMPDACCTL.bit.BLANKEN = 0;
    EDIS;

    //
    // Configures whether or not the digital filter latches are reset by PWMSYNC
    //
    EALLOW;
    Cmpss1Regs.COMPSTSCLR.bit.HSYNCCLREN = 0;
    Cmpss1Regs.COMPSTSCLR.bit.LSYNCCLREN = 0;
    EDIS;

    //
    // Enables the CMPSS module.
    //
    EALLOW;
    Cmpss1Regs.COMPCTL.bit.COMPDACE = 1;
    EDIS;

    //
    // Delay for CMPSS DAC to power up.
    //
    DEVICE_DELAY_US(500);



    EALLOW;
    GpioCtrlRegs.GPAGMUX2.bit.GPIO24 = 0;
    GpioCtrlRegs.GPAMUX2.bit.GPIO24 = 1;
    EDIS;

    EALLOW;
    OutputXbarRegs.OUTPUTLATCHENABLE.bit.OUTPUT1 = 0;
    OutputXbarRegs.OUTPUTINV.bit.OUTPUT1 = 0;
    //
    //Mux configuration
    //
    OutputXbarRegs.OUTPUT1MUXENABLE.bit.MUX0 = 1;
    EDIS;


}


void CMPSS2Driver_Init(void)
{
   

    // Analog PinMux for A10/c10
    // AIO -> Analog mode selected
    EALLOW;
    GpioCtrlRegs.GPHGMUX1.bit.GPIO230 = 0;
    GpioCtrlRegs.GPHMUX1.bit.GPIO230 = 0;
    GpioCtrlRegs.GPHINV.bit.GPIO230 = 0;
    GpioCtrlRegs.GPHAMSEL.bit.GPIO230 = 1;
    EDIS;



    //
    // Select the value for CMP1HPMXSEL./Select the value for CMP1LPMXSEL.
    //
    EALLOW;
    AnalogSubsysRegs.CMPHPMXSEL.bit.CMP2HPMXSEL = 3;
    AnalogSubsysRegs.CMPLPMXSEL.bit.CMP2LPMXSEL = 3;
    AnalogSubsysRegs.CMPHNMXSEL.bit.CMP2HNMXSEL = 0;
    AnalogSubsysRegs.CMPLNMXSEL.bit.CMP2LNMXSEL = 0;
//    AnalogSubsysRegs.LOCK.bit.VREGCTL = 1;
    EDIS;


    //
    // Sets the configuration for the high comparator.
    // Sets the configuration for the low comparator.
    EALLOW;
    Cmpss2Regs.COMPCTL.bit.COMPHSOURCE = 0;
    Cmpss2Regs.COMPCTL.bit.COMPHINV = 0;
    Cmpss2Regs.COMPCTL.bit.ASYNCHEN = 0;
    Cmpss2Regs.COMPCTL.bit.COMPLSOURCE = 0;
    Cmpss2Regs.COMPCTL.bit.COMPLINV = 0;
    Cmpss2Regs.COMPCTL.bit.ASYNCLEN = 0;
    EDIS;

    //
    // Sets the configuration for the internal comparator DACs.
    EALLOW;
    Cmpss2Regs.COMPDACCTL.bit.SWLOADSEL = 0;
    Cmpss2Regs.COMPDACCTL.bit.SELREF = 0;
    Cmpss2Regs.COMPDACCTL.bit.DACSOURCE = 0;
    EDIS;

    //
    // Sets the value of the internal DAC of the high comparator.
    //Sets the value of the internal DAC of the low comparator.
    EALLOW;
    Cmpss2Regs.DACHVALS.bit.DACVAL = 2048U;
    Cmpss2Regs.DACLVALS.bit.DACVAL = 0U;
    EDIS;

    //
    //  Configures the digital filter of the high comparator.
    //
    EALLOW;
    Cmpss2Regs.CTRIPHFILCTL.bit.SAMPWIN = 0;
    Cmpss2Regs.CTRIPHFILCTL.bit.THRESH = 0;
    Cmpss2Regs.CTRIPHFILCLKCTL.bit.CLKPRESCALE = 0;
    EDIS;

    //
    // Configures the digital filter of the low comparator.
    //
    EALLOW;
    Cmpss2Regs.CTRIPLFILCTL.bit.SAMPWIN = 0;
    Cmpss2Regs.CTRIPLFILCTL.bit.THRESH = 0;
    Cmpss2Regs.CTRIPLFILCLKCTL.bit.CLKPRESCALE = 0;
    EDIS;

    //
    // Sets the output signal configuration for the high comparator.
    //
    EALLOW;
    Cmpss2Regs.COMPCTL.bit.CTRIPOUTHSEL = 0;
    Cmpss2Regs