/********************************************************************************
 * MAHE, 13.05.2002, 12H40 - now compiling as project of separated source files
 ********************************************************************************/
#include "timer.h"
#include <pic1687x.h>
#include <pic.h>

Timer globalTimer;
/********************************************************************************************
 * Init of Timer1 module
 * p. 51 ff
 ********************************************************************************************/
void initTimer1(void) {
  /******************
   * Timer1 clock source
   * is internal clock (Fosc/4)
   ******************/
  TMR1CS=0;
  /*****************
   * Set start values
   * see calculation 
   * above at stru_timer
   * TMR1H:TMR1L=10000=0x2710
   *****************/
  TMR1H=0x27;
  TMR1L=0x10;
  /*****************
   * Prescaler is set
   * to 1:1 by setting
   * bits T1CON<5:4>
   * to 00
   *****************/
  T1CON&=0xCF;  /* 1100 1111 */
  T1CON|=0x00;  /* 0000 0000 */
}
/********************************************************************************************
 * Start Timer1
 ********************************************************************************************/
void startTimer1(void) {
  /************************
   * Reload timer register
   * with value 0x3CAF
   ************************/
  TMR1H=TMR1_MSB_RELOAD;
  TMR1L=TMR1_LSB_RELOAD;	
  TMR1ON=1;
}
/********************************************************************************************
 * Stop Timer1
 ********************************************************************************************/
void stopTimer1(void) {
  TMR1ON=0;
}
/********************************************************************************************
 * startGlobalTimer
 ********************************************************************************************/
void startGlobalTimer(unsigned int counterValue) {
  /*********************
   * Disable interrupt
   * for Timer1 module
   * in PIE1
   *********************/
  TMR1IE=0;
  /************************
   * Reload timer register
   * with value 0xD8EF
   ************************/
  TMR1H=TMR1_MSB_RELOAD;
  TMR1L=TMR1_LSB_RELOAD;		
  /*********************
   * Set timer values
   *********************/
  globalTimer.counter=counterValue;
  globalTimer.isRunning=1;
  globalTimer.isTerminated=0;
  globalTimer.timer1Counter=0;
  /*********************
   * Enable interrupt
   * for Timer1 module
   * in PIE1
   *********************/
  TMR1IE=1;
}
/********************************************************************************************
 * isFinishedGlobalTimer
 ********************************************************************************************/
char isFinishedGlobalTimer(void) {
  /*
    char retval;
    globalTimer.isTerminated ? retval=1 : retval=0;
    return retval;
  */
  return globalTimer.isTerminated;
}