timer.c

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/*
 ####        # 
 #           #
 ## ### #  # #
 #  #-# #\ # #
 #  # # # \# ####
 Author: Felipe de Andrade Neves Lavratti

 Copyright: There are no restrictions. Use as you want.   
*/

/*
        LPC 2478
        + TFT DISPLAY
        + TOUCH PANNEL
        + SWIM
        + SDRAM

        Get more at: selivre.wordpress.com
*/
#include "timer.h"

void T0Init(int ms)
{
        T0TCR = 0;
        T0TCR = 2;
        T0PR = (CPU_CLOCK_HZ*ms/4000) - 1;
        T0TCR = 0;
}

void T0Stop()
{
        T0TCR = 0;
}
void T0Start()
{
        T0TCR = 1;
}

int T0Get()
{
        return T0TC;
}

void delayMs(unsigned int delayInMs)
{
        /*
        * setup timer #1 for delay
        */
        T1TCR = 0x02;           /* reset timer */
        T1PR  = (CPU_CLOCK_HZ/4000 -1);         /* set prescaler to zero */
        T1MR0 = delayInMs;
        T1IR  = 0xff;           /* reset all interrrupts */
        T1MCR = 0x04;           /* stop timer on match */
        T1TCR = 0x01;           /* start timer */

        /* wait until delay time has elapsed */
        while (T1TCR & 0x01);
  return;
}

void delayUs(unsigned int delayInUs)
{
        /*
        * setup timer #1 for delay
        */
        T2TCR = 0x02;           /* reset timer */
        T2PR  = (CPU_CLOCK_HZ/4000000 -1);
        T2MR0 = delayInUs;
        T2IR  = 0xff;           /* reset all interrrupts */
        T2MCR = 0x04;           /* stop timer on match */
        T2TCR = 0x01;           /* start timer */

        /* wait until delay time has elapsed */
        while (T2TCR & 0x01);
  return;
}

int timeoutMs(unsigned int delayInMs, unsigned int condition)
{
        switch(condition)
        {
        case START:
                T1TCR = 0x02;           /* reset timer */
                T1PR  = (CPU_CLOCK_HZ/4000 -1);
                T1MR0 = delayInMs;
                T1IR  = 0xff;           /* reset all interrrupts */
                T1MCR = 0x04;           /* stop timer on match */
                T1TCR = 0x01;           /* start timer */
                break;

        case CHECK_IF_MATCH:
                if (T1TCR&0x01) return NOT_MATCH;
                else return MATCH;

        }

        return 1;
}

void delay_1us(int t)   //configurar ini_timer(1000000);
{
     unsigned int tf;
     tf = T0TC + t;
     while(tf != T0TC);
}