MBusLightSensor/src/time.cpp

/*
 * time.c
 *
 *  Created on: 20.05.2014
 *      Author: wn
 */
#include <msp430g2553.h>
#include <isr_compat.h>
#include <stdint.h>



volatile unsigned long timestamp;

ISR(TIMER0_A0, TA0_ISR) {
  static uint8_t state = 0;

  timestamp++;

  switch (state) {
  case 0:
    P1OUT = BIT0;
    state = 1;
    break;
  case 1:
    P1OUT = BIT6;
    state = 0;
    break;
  default:
    state = 0;
  }
}


void timeInit() {
  timestamp = 0;

  P1DIR |= BIT6 | BIT0;
  P1OUT = 0;

  TACCR0 = 32;
  TACCTL0 = CCIE;
  TACTL = MC_1 | ID_0 | TASSEL_1 | TACLR;
}


unsigned long millis() {
  return timestamp;
}