//###########################################################################
//
// FILE:    f28004x_adc.c
//
// TITLE:   F28004x ADC Support Functions.
//
//###########################################################################
// $TI Release: F28004x Support Library v1.12.00.00 $
// $Release Date: Fri Feb 12 18:57:27 IST 2021 $
// $Copyright:
// Copyright (C) 2021 Texas Instruments Incorporated - http://www.ti.com/
//
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions 
// are met:
// 
//   Redistributions of source code must retain the above copyright 
//   notice, this list of conditions and the following disclaimer.
// 
//   Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the 
//   documentation and/or other materials provided with the   
//   distribution.
// 
//   Neither the name of Texas Instruments Incorporated nor the names of
//   its contributors may be used to endorse or promote products derived
//   from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// $
//###########################################################################

//
// Included Files
//
#include "f28004x_device.h"      // Header File Include File
#include "f28004x_examples.h"    // Examples Include File

//
// SetVREF - Set Vref mode. Function to select reference mode and offset trim.
// Offset trim for Internal VREF 3.3 is unique.  All other modes use the same
// offset trim. Also note that when the mode parameter is ADC_EXTERNAL, the
// ref parameter has no effect.
//
void SetVREF(int module, int mode, int ref)
{
    Uint16 *offset, offval;

    //
    // Define offset locations from OTP
    //
    offset = (Uint16 *)(0x70594 + (module * 6));

    if((mode == ADC_INTERNAL) && (ref == ADC_VREF3P3))
    {
        offval = (*offset) >> 8;    // Internal / 1.65v mode offset
    }
    else
    {
        offval = (*offset) & 0xFF;  // All other modes
    }

    //
    // Write offset trim values and configure reference modes
    //
    EALLOW;
    switch(module)
    {
        case 0:
            AdcaRegs.ADCOFFTRIM.bit.OFFTRIM = offval;
            AnalogSubsysRegs.ANAREFCTL.bit.ANAREFASEL = mode;
            AnalogSubsysRegs.ANAREFCTL.bit.ANAREFA2P5SEL = ref;
            break;
        case 1:
            AdcbRegs.ADCOFFTRIM.bit.OFFTRIM = offval;
            AnalogSubsysRegs.ANAREFCTL.bit.ANAREFBSEL = mode;
            AnalogSubsysRegs.ANAREFCTL.bit.ANAREFB2P5SEL = ref;
            break;
        case 2:
            AdccRegs.ADCOFFTRIM.bit.OFFTRIM = offval;
            AnalogSubsysRegs.ANAREFCTL.bit.ANAREFCSEL = mode;
            AnalogSubsysRegs.ANAREFCTL.bit.ANAREFC2P5SEL = ref;
            break;
        default:
            break;
    }
    EDIS;
}

//
// End of File
//
