Commit 7fa97753 authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

Add MSP430FR5969 ADC driver

parent a92b8a81

include/msp430fr5969lp/driver/adc.h

0 → 100644
+17 −0
Original line number Diff line number Diff line 
#ifndef ADC_H

#define ADC_H



class ADC {

	private:

		ADC(ADC const &copy);



	public:

		ADC() {}



		float getTemp();

		float getVCC();

};



extern ADC adc;



#endif

src/arch/msp430fr5969lp/Makefile.inc

+1 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ CXX = /opt/msp430/ti/gcc/bin/msp430-elf-g++ 
OBJCOPY = /opt/msp430/ti/gcc/bin/msp430-elf-objcopy



TARGETS += src/arch/msp430fr5969lp/arch.cc

TARGETS += src/arch/msp430fr5969lp/driver/adc.cc

TARGETS += src/arch/msp430fr5969lp/driver/gpio.cc

TARGETS += src/arch/msp430fr5969lp/driver/stdout.cc

TARGETS += src/arch/msp430fr5969lp/driver/uptime.cc

src/arch/msp430fr5969lp/driver/adc.cc

0 → 100644
+71 −0
Original line number Diff line number Diff line 
#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;