timer.c

Go to the documentation of this file.

#include "timer.h"
#include "setup.h"

UINT volatile g_debouncer = 0;
UCHAR volatile g_s100 = 0;
UCHAR volatile g_sec = 0;
UINT volatile g_min = 0;
UCHAR volatile g_mov = 0;
CTRL_MODE volatile g_ctm = CM_MEAS;
ENG_TIMER volatile g_et;


void TimerInit(void) {
  TCC_R0 = (1<<CS02) | (0<<CS01) | (0<<CS00);

  TCCR0A = (0<<TCW0) | (0<<ICEN0) | (0<<ICNC0) | (0<<ICES0) | (0<<ACIC0) | (1<<CTC0);

  OCR0A = T0_INC20;

  TIMSK = (0 << OCIE1D) | (0 << OCIE1A) | (0 << OCIE1B) | (1 << OCIE0A) | (0 << OCIE0B) | (0 << TOIE1) | (0 << TOIE0) | (0 << TICIE0);

  PLLCSR=(0<<PCKE) | (0<<PLLE) | (0<<PLOCK);
}

ISR(TIMER0_COMPA_vect) {
  static UCHAR s_s100 = 0;
  static UINT s_1s = 0;
//  static UCHAR s_ecp = 0; //counter for error compensation

  ++g_debouncer;
  if(++s_s100 > (IV_1S/10)) {
    s_s100 = 0;
    if(++g_s100 > 9)
      g_s100 = 0;
    //count and handle mixer engine timeout
    ++g_et.cnt;
    if(g_et.allow && g_et.cnt >= gEcd()) {
      g_et.allow = FALSE;
      g_et.em = EM_STOP;
      //explicitly switch off engine (take advantage of doing this in interrupt)
      ENG_STOP_CW;
      ENG_STOP_CCW;
    }
  }
  if(++s_1s > IV_1S) {
    s_1s = 0;
    if(++g_sec > 59) {
      //one period gone?
      if((++g_min) > (NUM_MS * gIvMeas()) - 1) {
        g_min = 0;
        ++g_mov;
      }
      g_ctm = CM_MEAS; //allow control in new minute
      g_sec = 0;
    }
  }
  //adjust compare match value (changed by comm)
  OCR0A = T0_INC20;
}

BTN_CODE DecodeButton(void)
{
  //bblp: both buttons long pressed
  static UCHAR btnUp=FALSE, btnDn=FALSE, firstUp=FALSE, firstDn=FALSE, bblp=FALSE;
  static UINT debUp=DEBOUNCED_S, debDn=DEBOUNCED_S;
  BTN_CODE bc = BC_NONE;

  if(BTN_UP && !btnUp) {
    btnUp = TRUE;
    g_debouncer = 0;
  }
  else if(btnUp && BTN_UP && (g_debouncer > debUp)) {
    //enhance debouncer threshold after first button press, before doing action repetitive
    if(firstUp) {
      debUp = DEBOUNCED_L;
      firstUp=FALSE;
    }
    else
      debUp = DEBOUNCED_S;
    btnUp = FALSE;
//    *btnOff = OFF_NEAR;
    bc |= BC_UP;
  }
  if(!(BTN_UP) && (g_debouncer > DEBOUNCED_S)) {
    btnUp = FALSE;
    //prepare first delay ability
    firstUp=TRUE;
    debUp = DEBOUNCED_S;
    bblp = FALSE;
  }

  if(BTN_DN && !btnDn) {
    btnDn = TRUE;
    g_debouncer = 0;
  }
  else if(btnDn && BTN_DN && (g_debouncer > debDn)) {
    //enhance debouncer threshold after first button press, before doing action repetitive
    if(firstDn) {
      debDn = DEBOUNCED_L;
      firstDn=FALSE;
    }
    else
      debDn = DEBOUNCED_S;
    btnDn = FALSE;
//    *btnOff = OFF_NEAR;
    bc |= BC_DN;
  }
  if(!(BTN_DN) && (g_debouncer > DEBOUNCED_S)) {
    btnDn = FALSE;
    //prepare first delay ability
    firstDn=TRUE;
    debDn = DEBOUNCED_S;
    bblp = FALSE;
  }
  //are both buttons pressed for a longer time?
  if(bc == BC_DNUP && (!firstUp) && (!firstDn)) {
    if(bblp) {
      bblp = FALSE;
      bc = BC_DNUP_L;
    }
    else {
      bblp = TRUE;
    }
    debUp = DEBOUNCED_L;
    debDn = DEBOUNCED_L;
  }
  return bc;
}

UCHAR GetTenthSec(void) {
  return g_s100;
}

UCHAR gMov() {
  return g_mov;
}

void sMov(UCHAR mov) {
  g_mov = mov;
}