LCOM1920-T02G10

#include <lcom/lcf.h>

#include <lcom/timer.h>

#include <stdint.h>

#include "i8254.h"

uint32_t cont=0;

int hook_id;

int (timer_set_frequency)(uint8_t timer, uint32_t freq) {

  /* To be implemented by the students */

  uint8_t conf;

  timer_get_conf(timer,&conf);

  uint32_t tudo;

  uint8_t msb,lsb;

  tudo=(TIMER_FREQ/freq);

  util_get_MSB(tudo,&msb);

  util_get_LSB(tudo,&lsb);

  //printf("%x\n%x\n%x\n%d\n",tudo,msb,lsb,timer);

  if(timer==0)

  {

    conf=(conf&0xF);

    conf = (conf  | TIMER_SEL0 | TIMER_LSB_MSB);

  if(sys_outb(TIMER_CTRL, conf)!=0) return 1;

  if(sys_outb(TIMER_0, lsb)!=0) return 1;

  if(sys_outb(TIMER_0, msb)!=0) return 1;

  }

  if(timer==1)

  {

    conf=(conf&0xF);

    conf = (conf | TIMER_SEL1 | TIMER_LSB_MSB);

  if(sys_outb(TIMER_CTRL, conf)!=0) return 1;

  if(sys_outb(TIMER_1, lsb)!=0) return 1;

  if(sys_outb(TIMER_1, msb)!=0) return 1;

  }

  if(timer==2)

  {

    conf=(conf&0xF);

    conf = (conf | TIMER_SEL2 | TIMER_LSB_MSB);

  if(sys_outb(TIMER_CTRL, conf)!=0) return 1;

  if(sys_outb(TIMER_2, lsb)!=0) return 1;

  if(sys_outb(TIMER_2, msb)!=0) return 1;

  }

  return 0;

}

int (timer_subscribe_int)(uint8_t *bit_no) {

    /* To be implemented by the students */

  //printf("%s is not yet implemented!\n", __func__);

 /*  int policy;

  sys_irqrmpolicy(&policy); */

  hook_id=*bit_no;

  if(sys_irqsetpolicy(IRQ_TIMER,IRQ_REENABLE,&hook_id)!=0) return 1;

  return 0;

}

int (timer_unsubscribe_int)() {

  /* To be implemented by the students */

// printf("%s is not yet implemented!\n", __func__);

  if(sys_irqrmpolicy(&hook_id)!=0) return 1;

  return 0;

}

void (timer_int_handler)() {

  /* To be implemented by the students */

  //printf("%s is not yet implemented!\n", __func__);

  cont=cont+1;

}

int (timer_get_conf)(uint8_t timer, uint8_t *st) {

  /* To be implemented by the students */

  uint8_t rbc = (TIMER_RB_CMD|TIMER_RB_SEL(4)|TIMER_RB_SEL(timer));

  if(sys_outb(TIMER_CTRL,rbc)!=0) return 1;

  if(timer==0)

  return (util_sys_inb(TIMER_0,st));

  if(timer==1)

  return (util_sys_inb(TIMER_1,st));

  if(timer==2)

  return (util_sys_inb(TIMER_2,st));

  return 1;

  //printf("%s is not yet implemented!\n", __func__);

}

int (timer_display_conf)(uint8_t timer, uint8_t st,

                        enum timer_status_field field) {

  /* To be implemented by the students */

  union timer_status_field_val val;

  if(field==tsf_all)

  {

    val.byte=st; 

  }

 if(field==tsf_initial)

  {

    //printf("%d\n",tsf_initial);

  if(((st&0x30)>>4)==0)

  val.in_mode=INVAL_val;

  if(((st&0x30)>>4)==1)

  val.in_mode=LSB_only;

  if(((st&0x30)>>4)==2)

  val.in_mode=MSB_only;

  if(((st&0x30)>>4)==3)

  val.in_mode=MSB_after_LSB;

  }

  if(field==tsf_mode)

  {

    //printf("%x\n",st);

    val.count_mode=((st&0xE)>>1);

    /* printf("%x\n",val.count_mode);

    val.count_mode=(val.count_mode>>1);

    printf("%x\n",val.count_mode); */

  //val.count_mode=(st&0x1C)/4;

 if (val.count_mode==6)

 val.count_mode=2;

 if (val.count_mode==7)

 val.count_mode=3;

  }

  if(field==tsf_base ) //BCD

  {

    //printf("%d\n",tsf_base);

    if((st&BIT(0))==1)

    val.bcd=true;

    else val.bcd=false;

  }

 return( timer_print_config(timer, field, val));

  //printf("%s is not yet implemented!\n", __func__);

  //return 0;

}