TMS320F28027 Comparator

// TI File $Revision: /main/3 $
// Checkin $Date: September 22, 2009   10:53:23 $
//###########################################################################
//
// FILE:    DSP2802x_Comp.c
//
// TITLE:   DSP2802x Comparator Initialization & Support Functions.
//
//###########################################################################
// $TI Release: f2802x Support Library v210 $
// $Release Date: Mon Sep 17 09:13:31 CDT 2012 $
//###########################################################################

#include "F2802x_Device.h"     // Headerfile Include File
#include "f2802x_common/include/F2802x_Examples.h"   // Examples Include File

//---------------------------------------------------------------------------
// InitComp:
//---------------------------------------------------------------------------
// This function initializes the Comp to a known state.
//
void InitComp(void)
{
    // Initialize Comp:

    //tbd...
}

//---------------------------------------------------------------------------
// Example: InitCompGpio:
//---------------------------------------------------------------------------
// This function initializes GPIO pins to function as Comp pins
//
// Each GPIO pin can be configured as a GPIO pin or up to 3 different
// peripheral functional pins. By default all pins come up as GPIO
// inputs after reset.
//
// Caution:
// Only one GPIO pin should be enabled for CMP1OUT operation.
// Only one GPIO pin shoudl be enabled for CMP2OUT operation.
// Comment out other unwanted lines.

void InitCompGpio()
{
    InitComp1Gpio();
    #if DSP28_COMP2
        InitComp2Gpio();
    #endif

}

void InitComp1Gpio()
{

   EALLOW;

/* Disable internal pull-up for the selected output pins
   to reduce power consumption */
// Pull-ups can be enabled or disabled disabled by the user.
// Comment out other unwanted lines.

    GpioCtrlRegs.GPAPUD.bit.GPIO1 = 1;    // Disable pull-up for GPIO1 (CMP1OUT)

/* Configure Comp pins using GPIO regs*/
// This specifies which of the possible GPIO pins will be Comp functional pins.
// Comment out other unwanted lines.

    GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 3;   // Configure GPIO1 for CMP1OUT operation

    GpioCtrlRegs.AIOMUX1.bit.AIO2 = 2;    // Configure AIO2 for CMP1A (analog input) operation
    GpioCtrlRegs.AIOMUX1.bit.AIO10 = 2;   // Configure AIO10 for CMP1B (analog input) operation

    EDIS;
}

#if DSP28_COMP2
void InitComp2Gpio()
{

   EALLOW;

/* Disable internal pull-up for the selected output pins
   to reduce power consumption */
// Pull-ups can be enabled or disabled disabled by the user.
// Comment out other unwanted lines.

    GpioCtrlRegs.GPAPUD.bit.GPIO3 = 1;    // Disable pull-up for GPIO3 (CMP2OUT)
//  GpioCtrlRegs.GPBPUD.bit.GPIO34 = 1;   // Disable pull-up for GPIO34 (CMP2OUT)

/* Configure Comp pins using GPIO regs*/
// This specifies which of the possible GPIO pins will be Comp functional pins.
// Comment out other unwanted lines.

    GpioCtrlRegs.GPAMUX1.bit.GPIO3 = 3;   // Configure GPIO3 for CMP2OUT operation
//  GpioCtrlRegs.GPBMUX1.bit.GPIO34 = 1;  // Configure GPIO34 for CMP2OUT operation

    GpioCtrlRegs.AIOMUX1.bit.AIO4 = 2;    // Configure AIO4 for CMP2A (analog input) operation
    GpioCtrlRegs.AIOMUX1.bit.AIO12 = 2;   // Configure AIO12 for CMP2B (analog input) operation

    EDIS;
}

#endif //end DSP28_COMP2

//===========================================================================
// End of file.
//===========================================================================

//#############################################################################
//
//! \file   f2802x_common/source/comp.c
//!
//! \brief  Contains the various functions related to the comparator 
//!         (COMP) object
//
//  Group:          C2000
//  Target Device:  TMS320F2802x
//
//  (C) Copyright 2012, Texas Instruments, Inc.
//#############################################################################
// $TI Release: f2802x Support Library v210 $
// $Release Date: Mon Sep 17 09:13:31 CDT 2012 $
//#############################################################################

// **************************************************************************
// the includes
#include "DSP28x_Project.h"
#include "f2802x_common/include/comp.h"


// assembly file
extern void usDelay(unsigned long Count);


// **************************************************************************
// the defines


// **************************************************************************
// the globals


// **************************************************************************
// the functions


void COMP_disable(COMP_Handle compHandle)
{
    COMP_Obj *comp = (COMP_Obj *)compHandle;

    ENABLE_PROTECTED_REGISTER_WRITE_MODE;

    // clear the bits
    comp->COMPCTL &= ~COMP_COMPCTL_COMPDACE_BITS;

    DISABLE_PROTECTED_REGISTER_WRITE_MODE;

    return;
} // end of COMP_disable() function


void COMP_disableDac(COMP_Handle compHandle)
{
    COMP_Obj *comp = (COMP_Obj *)compHandle;

    ENABLE_PROTECTED_REGISTER_WRITE_MODE;

    // set the bits
    comp->COMPCTL |= COMP_COMPCTL_COMPSOURCE_BITS;

    DISABLE_PROTECTED_REGISTER_WRITE_MODE;

    return;
} // end of COMP_disableDac() function


void COMP_enable(COMP_Handle compHandle)
{
    COMP_Obj *comp = (COMP_Obj *)compHandle;

    ENABLE_PROTECTED_REGISTER_WRITE_MODE;

    // set the bits
    comp->COMPCTL |= COMP_COMPCTL_COMPDACE_BITS;

    DISABLE_PROTECTED_REGISTER_WRITE_MODE;

    return;
} // end of COMP_enable() function


void COMP_enableDac(COMP_Handle compHandle)
{
    COMP_Obj *comp = (COMP_Obj *)compHandle;

    ENABLE_PROTECTED_REGISTER_WRITE_MODE;

    // set the bits
    comp->COMPCTL &= ~COMP_COMPCTL_COMPSOURCE_BITS;

    DISABLE_PROTECTED_REGISTER_WRITE_MODE;

    return;
} // end of COMP_enableDac() function


COMP_Handle COMP_init(void *pMemory, const size_t numBytes)
{
    COMP_Handle compHandle;

    if(numBytes < sizeof(COMP_Obj))
    return((COMP_Handle)NULL);

    // assign the handle
    compHandle = (COMP_Handle)pMemory;

    return(compHandle);
} // end of COMP_init() function







// end of file