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/*
* Copyright 2020 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
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#include "driver/adc.h"
#include <msp430.h>
#define CALADC12_12V_30C *((unsigned int *)0x1A1A)
#define CALADC12_12V_85C *((unsigned int *)0x1A1C)
float ADC::getTemp()
{
float ret;
while(REFCTL0 & REFGENBUSY);
REFCTL0 = REFVSEL_0 | REFON;
ADC12CTL0 &= ~ADC12ENC;
ADC12CTL0 = ADC12SHT0_8 | ADC12ON;
ADC12CTL1 = ADC12SHP;
ADC12CTL3 = ADC12TCMAP;
ADC12MCTL0 = ADC12VRSEL_1 | ADC12INCH_30;
while(!(REFCTL0 & REFGENRDY));
ADC12CTL0 |= ADC12ENC;
ADC12CTL0 |= ADC12SC;
while (ADC12CTL1 & ADC12BUSY);
ret = (float)((long)ADC12MEM0 - CALADC12_12V_30C) * (85 - 30) /
(CALADC12_12V_85C - CALADC12_12V_30C) + 30.0f;
// Disable ADC
ADC12CTL0 &= ~ADC12ENC; // disable any conversion to allow ADC configuration
ADC12CTL0 &= ~ADC12ON; // Turn off ADC
// Disable internal 2V reference
while(REFCTL0 & REFGENBUSY);
REFCTL0 &= ~REFON;
return ret;
}
float ADC::getVCC()
{
float ret;
while(REFCTL0 & REFGENBUSY);
REFCTL0 = REFVSEL_1 | REFON;
ADC12CTL0 &= ~ADC12ENC;
ADC12CTL0 = ADC12SHT0_8 | ADC12ON;
ADC12CTL1 = ADC12SHP;
ADC12CTL3 = ADC12BATMAP;
ADC12MCTL0 = ADC12VRSEL_1 | ADC12INCH_31;
while(!(REFCTL0 & REFGENRDY));
ADC12CTL0 |= ADC12ENC;
ADC12CTL0 |= ADC12SC;
while (ADC12CTL1 & ADC12BUSY);
ret = (float)ADC12MEM0 / 4096 * 2 * 2;
return ret;
// Disable ADC
ADC12CTL0 &= ~ADC12ENC; // disable any conversion to allow ADC configuration
ADC12CTL0 &= ~ADC12ON; // Turn off ADC
// Disable internal 2V reference
while(REFCTL0 & REFGENBUSY);
REFCTL0 &= ~REFON;
return ret;
}
ADC adc;