299 lines
8.8 KiB
C
299 lines
8.8 KiB
C
//###########################################################################
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//
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// FILE: F2837xD_Adc.c
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//
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// TITLE: F2837xD Adc Support Functions.
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//
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//###########################################################################
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//
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// $Release Date: $
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// $Copyright:
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// Copyright (C) 2013-2022 Texas Instruments Incorporated - http://www.ti.com/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the
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// distribution.
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//
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// Neither the name of Texas Instruments Incorporated nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// $
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//###########################################################################
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//
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// Included Files
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//
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#include "F2837xD_device.h"
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#include "F2837xD_Examples.h"
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//
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// AdcSetMode - Set the resolution and signalmode for a given ADC. This will
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// ensure that the correct trim is loaded.
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//
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// NOTE!!! There is no EALLOW/EDIS in this function! You need to make sure you
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// perform the EALLOW before calling this function or else the ADC registers
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// will not be configured.
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//
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void AdcSetMode(Uint16 adc, Uint16 resolution, Uint16 signalmode)
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{
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Uint16 adcOffsetTrimOTPIndex; //index into OTP table of ADC offset trims
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Uint16 adcOffsetTrim; //temporary ADC offset trim
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//
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//re-populate INL trim
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//
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CalAdcINL(adc);
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if(0xFFFF != *((Uint16*)GetAdcOffsetTrimOTP))
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{
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//
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//offset trim function is programmed into OTP, so call it
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//
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//
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//calculate the index into OTP table of offset trims and call
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//function to return the correct offset trim
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//
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#ifndef _DUAL_HEADERS
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if(ADC_RESOLUTION_12BIT == resolution)
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#else
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if(ADC_BITRESOLUTION_12BIT == resolution)
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#endif
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{
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adcOffsetTrimOTPIndex = 4*adc + 1*signalmode;
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}
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else
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{
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adcOffsetTrimOTPIndex = 4*adc + 1*signalmode + 2;
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}
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adcOffsetTrim = (*GetAdcOffsetTrimOTP)(adcOffsetTrimOTPIndex);
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}
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else
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{
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//
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//offset trim function is not populated, so set offset trim to 0
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//
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adcOffsetTrim = 0;
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}
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//
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// Apply the resolution and signalmode to the specified ADC.
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// Also apply the offset trim and, if needed, linearity trim correction.
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//
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switch(adc)
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{
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case ADC_ADCA:
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{
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AdcaRegs.ADCCTL2.bit.SIGNALMODE = signalmode;
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if(adcOffsetTrim > 0x0)
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{
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AdcaRegs.ADCOFFTRIM.all = adcOffsetTrim;
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}
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#ifndef _DUAL_HEADERS
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if(ADC_RESOLUTION_12BIT == resolution)
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#else
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if(ADC_BITRESOLUTION_12BIT == resolution)
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#endif
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{
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AdcaRegs.ADCCTL2.bit.RESOLUTION = 0;
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//
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//12-bit linearity trim workaround
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//
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AdcaRegs.ADCINLTRIM1 &= 0xFFFF0000;
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AdcaRegs.ADCINLTRIM2 &= 0xFFFF0000;
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AdcaRegs.ADCINLTRIM4 &= 0xFFFF0000;
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AdcaRegs.ADCINLTRIM5 &= 0xFFFF0000;
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}
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else
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{
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AdcaRegs.ADCCTL2.bit.RESOLUTION = 1;
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}
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break;
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}
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case ADC_ADCB:
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{
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AdcbRegs.ADCCTL2.bit.SIGNALMODE = signalmode;
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if(adcOffsetTrim > 0x0)
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{
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AdcbRegs.ADCOFFTRIM.all = adcOffsetTrim;
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}
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#ifndef _DUAL_HEADERS
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if(ADC_RESOLUTION_12BIT == resolution)
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#else
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if(ADC_BITRESOLUTION_12BIT == resolution)
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#endif
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{
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AdcbRegs.ADCCTL2.bit.RESOLUTION = 0;
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//
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//12-bit linearity trim workaround
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//
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AdcbRegs.ADCINLTRIM1 &= 0xFFFF0000;
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AdcbRegs.ADCINLTRIM2 &= 0xFFFF0000;
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AdcbRegs.ADCINLTRIM4 &= 0xFFFF0000;
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AdcbRegs.ADCINLTRIM5 &= 0xFFFF0000;
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}
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else
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{
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AdcbRegs.ADCCTL2.bit.RESOLUTION = 1;
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}
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break;
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}
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case ADC_ADCC:
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{
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AdccRegs.ADCCTL2.bit.SIGNALMODE = signalmode;
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if(adcOffsetTrim > 0x0)
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{
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AdccRegs.ADCOFFTRIM.all = adcOffsetTrim;
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}
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#ifndef _DUAL_HEADERS
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if(ADC_RESOLUTION_12BIT == resolution)
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#else
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if(ADC_BITRESOLUTION_12BIT == resolution)
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#endif
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{
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AdccRegs.ADCCTL2.bit.RESOLUTION = 0;
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//
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//12-bit linearity trim workaround
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//
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AdccRegs.ADCINLTRIM1 &= 0xFFFF0000;
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AdccRegs.ADCINLTRIM2 &= 0xFFFF0000;
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AdccRegs.ADCINLTRIM4 &= 0xFFFF0000;
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AdccRegs.ADCINLTRIM5 &= 0xFFFF0000;
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}
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else
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{
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AdccRegs.ADCCTL2.bit.RESOLUTION = 1;
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}
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break;
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}
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case ADC_ADCD:
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{
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AdcdRegs.ADCCTL2.bit.SIGNALMODE = signalmode;
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if(adcOffsetTrim > 0x0)
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{
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AdcdRegs.ADCOFFTRIM.all = adcOffsetTrim;
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}
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#ifndef _DUAL_HEADERS
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if(ADC_RESOLUTION_12BIT == resolution)
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#else
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if(ADC_BITRESOLUTION_12BIT == resolution)
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#endif
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{
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AdcdRegs.ADCCTL2.bit.RESOLUTION = 0;
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//
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//12-bit linearity trim workaround
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//
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AdcdRegs.ADCINLTRIM1 &= 0xFFFF0000;
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AdcdRegs.ADCINLTRIM2 &= 0xFFFF0000;
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AdcdRegs.ADCINLTRIM4 &= 0xFFFF0000;
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AdcdRegs.ADCINLTRIM5 &= 0xFFFF0000;
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}
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else
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{
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AdcdRegs.ADCCTL2.bit.RESOLUTION = 1;
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}
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break;
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}
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}
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}
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//
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// CalAdcINL - Loads INL trim values from OTP into the trim registers of the
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// specified ADC. Use only as part of AdcSetMode function, since
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// linearity trim correction is needed for some modes.
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//
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void CalAdcINL(Uint16 adc)
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{
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switch(adc)
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{
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case ADC_ADCA:
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if(0xFFFF != *((Uint16*)CalAdcaINL))
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{
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//
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//trim function is programmed into OTP, so call it
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//
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(*CalAdcaINL)();
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}
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else
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{
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//
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//do nothing, no INL trim function populated
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//
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}
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break;
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case ADC_ADCB:
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if(0xFFFF != *((Uint16*)CalAdcbINL))
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{
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//
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//trim function is programmed into OTP, so call it
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//
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(*CalAdcbINL)();
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}
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else
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{
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//
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//do nothing, no INL trim function populated
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//
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}
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break;
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case ADC_ADCC:
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if(0xFFFF != *((Uint16*)CalAdccINL))
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{
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//
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//trim function is programmed into OTP, so call it
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//
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(*CalAdccINL)();
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}
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else
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{
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//
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//do nothing, no INL trim function populated
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//
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}
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break;
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case ADC_ADCD:
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if(0xFFFF != *((Uint16*)CalAdcdINL))
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{
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//
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//trim function is programmed into OTP, so call it
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//
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(*CalAdcdINL)();
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}
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else
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{
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//
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//do nothing, no INL trim function populated
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//
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}
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break;
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}
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}
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//
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// End of file
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//
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