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//###########################################################################
//
// FILE: F2837xD_Adc.c
//
// TITLE: F2837xD Adc Support Functions.
//
//###########################################################################
// $TI Release: F2837xD Support Library v3.05.00.00 $
// $Release Date: Tue Jun 26 03:15:23 CDT 2018 $
// $Copyright:
// Copyright (C) 2013-2018 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,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (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 "F2837xD_device.h"
#include "F2837xD_Examples.h"
//
// AdcSetMode - Set the resolution and signalmode for a given ADC. This will
// ensure that the correct trim is loaded.
//
// NOTE!!! There is no EALLOW/EDIS in this function! You need to make sure you
// perform the EALLOW before calling this function or else the ADC registers
// will not be configured.
//
void AdcSetMode(Uint16 adc, Uint16 resolution, Uint16 signalmode)
{
Uint16 adcOffsetTrimOTPIndex; //index into OTP table of ADC offset trims
Uint16 adcOffsetTrim; //temporary ADC offset trim
//
//re-populate INL trim
//
CalAdcINL(adc);
if(0xFFFF != *((Uint16*)GetAdcOffsetTrimOTP))
{
//
//offset trim function is programmed into OTP, so call it
//
//
//calculate the index into OTP table of offset trims and call
//function to return the correct offset trim
//
#ifndef _DUAL_HEADERS
if(ADC_RESOLUTION_12BIT == resolution)
#else
if(ADC_BITRESOLUTION_12BIT == resolution)
#endif
{
adcOffsetTrimOTPIndex = 4*adc + 1*signalmode;
}
else
{
adcOffsetTrimOTPIndex = 4*adc + 1*signalmode + 2;
}
adcOffsetTrim = (*GetAdcOffsetTrimOTP)(adcOffsetTrimOTPIndex);
}
else
{
//
//offset trim function is not populated, so set offset trim to 0
//
adcOffsetTrim = 0;
}
//
// Apply the resolution and signalmode to the specified ADC.
// Also apply the offset trim and, if needed, linearity trim correction.
//
switch(adc)
{
case ADC_ADCA:
{
AdcaRegs.ADCCTL2.bit.SIGNALMODE = signalmode;
AdcaRegs.ADCOFFTRIM.all = adcOffsetTrim;
#ifndef _DUAL_HEADERS
if(ADC_RESOLUTION_12BIT == resolution)
#else
if(ADC_BITRESOLUTION_12BIT == resolution)
#endif
{
AdcaRegs.ADCCTL2.bit.RESOLUTION = 0;
//
//12-bit linearity trim workaround
//
AdcaRegs.ADCINLTRIM1 &= 0xFFFF0000;
AdcaRegs.ADCINLTRIM2 &= 0xFFFF0000;
AdcaRegs.ADCINLTRIM4 &= 0xFFFF0000;
AdcaRegs.ADCINLTRIM5 &= 0xFFFF0000;
}
else
{
AdcaRegs.ADCCTL2.bit.RESOLUTION = 1;
}
break;
}
case ADC_ADCB:
{
AdcbRegs.ADCCTL2.bit.SIGNALMODE = signalmode;
AdcbRegs.ADCOFFTRIM.all = adcOffsetTrim;
#ifndef _DUAL_HEADERS
if(ADC_RESOLUTION_12BIT == resolution)
#else
if(ADC_BITRESOLUTION_12BIT == resolution)
#endif
{
AdcbRegs.ADCCTL2.bit.RESOLUTION = 0;
//
//12-bit linearity trim workaround
//
AdcbRegs.ADCINLTRIM1 &= 0xFFFF0000;
AdcbRegs.ADCINLTRIM2 &= 0xFFFF0000;
AdcbRegs.ADCINLTRIM4 &= 0xFFFF0000;
AdcbRegs.ADCINLTRIM5 &= 0xFFFF0000;
}
else
{
AdcbRegs.ADCCTL2.bit.RESOLUTION = 1;
}
break;
}
case ADC_ADCC:
{
AdccRegs.ADCCTL2.bit.SIGNALMODE = signalmode;
AdccRegs.ADCOFFTRIM.all = adcOffsetTrim;
#ifndef _DUAL_HEADERS
if(ADC_RESOLUTION_12BIT == resolution)
#else
if(ADC_BITRESOLUTION_12BIT == resolution)
#endif
{
AdccRegs.ADCCTL2.bit.RESOLUTION = 0;
//
//12-bit linearity trim workaround
//
AdccRegs.ADCINLTRIM1 &= 0xFFFF0000;
AdccRegs.ADCINLTRIM2 &= 0xFFFF0000;
AdccRegs.ADCINLTRIM4 &= 0xFFFF0000;
AdccRegs.ADCINLTRIM5 &= 0xFFFF0000;
}
else
{
AdccRegs.ADCCTL2.bit.RESOLUTION = 1;
}
break;
}
case ADC_ADCD:
{
AdcdRegs.ADCCTL2.bit.SIGNALMODE = signalmode;
AdcdRegs.ADCOFFTRIM.all = adcOffsetTrim;
#ifndef _DUAL_HEADERS
if(ADC_RESOLUTION_12BIT == resolution)
#else
if(ADC_BITRESOLUTION_12BIT == resolution)
#endif
{
AdcdRegs.ADCCTL2.bit.RESOLUTION = 0;
//
//12-bit linearity trim workaround
//
AdcdRegs.ADCINLTRIM1 &= 0xFFFF0000;
AdcdRegs.ADCINLTRIM2 &= 0xFFFF0000;
AdcdRegs.ADCINLTRIM4 &= 0xFFFF0000;
AdcdRegs.ADCINLTRIM5 &= 0xFFFF0000;
}
else
{
AdcdRegs.ADCCTL2.bit.RESOLUTION = 1;
}
break;
}
}
}
//
// CalAdcINL - Loads INL trim values from OTP into the trim registers of the
// specified ADC. Use only as part of AdcSetMode function, since
// linearity trim correction is needed for some modes.
//
void CalAdcINL(Uint16 adc)
{
switch(adc)
{
case ADC_ADCA:
if(0xFFFF != *((Uint16*)CalAdcaINL))
{
//
//trim function is programmed into OTP, so call it
//
(*CalAdcaINL)();
}
else
{
//
//do nothing, no INL trim function populated
//
}
break;
case ADC_ADCB:
if(0xFFFF != *((Uint16*)CalAdcbINL))
{
//
//trim function is programmed into OTP, so call it
//
(*CalAdcbINL)();
}
else
{
//
//do nothing, no INL trim function populated
//
}
break;
case ADC_ADCC:
if(0xFFFF != *((Uint16*)CalAdccINL))
{
//
//trim function is programmed into OTP, so call it
//
(*CalAdccINL)();
}
else
{
//
//do nothing, no INL trim function populated
//
}
break;
case ADC_ADCD:
if(0xFFFF != *((Uint16*)CalAdcdINL))
{
//
//trim function is programmed into OTP, so call it
//
(*CalAdcdINL)();
}
else
{
//
//do nothing, no INL trim function populated
//
}
break;
}
}
//
// End of file
//
|
