Files
TeaThermoTimer/src/measure.c
2016-09-05 12:05:03 +02:00

63 lines
1.3 KiB
C

/*
* adc.cpp
*
* Created on: 03.10.2014
* Author: wn
*/
#include <msp430g2553.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include "measure.h"
#include "PontCoopScheduler.h"
#include "displayMuxer.h"
#include "display.h"
#include "gpio.h"
const float R_REF = 3000.0;
const uint16_t N_MAX = 1023;
const float PT1000_R0 = 1000.0;
const float PT1000_Coeff = 3.85e-3;
void measureInit(void *handleArg) {
ADC10CTL0 = SREF1 | ADC10SHT_3 | ADC10SR | REFOUT | REFON | REF2_5V | ADC10ON;
ADC10CTL1 = INCH_3;
ADC10AE0 = BIT3;
}
void measureCollectAndProcessConversion(void *handleArg);
void measureStartConversion(void *handleArg) {
//gpioSetPin(TESTPIN1, HIGH);
ADC10CTL0 |= ENC | ADC10SC;
schAdd(measureCollectAndProcessConversion, NULL, 10, 0);
//gpioSetPin(TESTPIN1, LOW);
}
void measureCollectAndProcessConversion(void *handleArg) {
//gpioSetPin(TESTPIN2, HIGH);
uint16_t n = 0xffff;
if ((ADC10CTL0 & ADC10IFG) != 0) {
n = ADC10MEM;
ADC10CTL0 &= ~(ADC10IFG | ENC);
}
// process adcValue
// store result in variable temperature
float r = ((((float)N_MAX) / ((float)n)) - 1.0) * R_REF;
float t = (r / PT1000_R0 - 1) / PT1000_Coeff;
uint8_t temperature = (uint8_t)t;
// displaySetValue(temperature);
displayMuxerSetValue(temperature, true, TEMPERATURE_MUX);
//gpioSetPin(TESTPIN2, LOW);
}