xs128 dual timers PIT0 and PIT1

/*****************************************************************

** Function description: xs128 dual timer PIT0 and PIT1

** Version: V1.00        

**Revised by: Pang Hui, Wuhu Lianda Freescale Studio                     

** Modified on: September 19, 2011    

**        

** Description: PLL frequency is multiplied to 80Mhz, PB0 port light flashes for 1s, PB1 port light flashes for 2s    

**                                                          

** Version update: see readme.txt for details

**                                                                                                                               

******************************************************************

**Note: LED1 lights PORTB0

** LED2 PORTB1   

******************************************************************/

#include       /* common defines and macros */

#include "derivative.h"      /* derivative-specific definitions */

/***********************************************************

** Name: void PLL_Init(void)

** Function: PLL phase-locked loop module initialization

** Input parameters: None

** Export parameters: None

** Instructions for use: 80MHz

************************************************************/

void PLL_Init(void)  

{   

    CLKSEL = 0X00;

    PLLCTL_PLLON = 1;

    SYNR =0xc0 | 0x09;  //80M                     

    REFDV=0x80 | 0x01;

    //SYNR =0xc0 | 0x04;  //40M                        

    //REFDV=0x80 | 0x01; 

    POSTDIV = 0x00;       //pllclock=2*osc*(1+SYNR)/(1+REFDV)=160MHz;

                                        //BUS CLOCK=80M

    _asm(nop); //No operation, simple delay, waiting for the response of the phase-locked loop 

    _asm(nop);

    while(!(CRGFLG_LOCK==1))

    {

      _asm(nop);  

    }   

    CLKSEL_PLLSEL = 1;        

}

/***********************************************************

** Name: void PIT_Init(void) 

** Function: Initialize PIT timing module

** Input parameters: None

** Export parameters: None

** Instructions for use: PIT0 1ms timing

** PIT1 8ms timing

************************************************************/

void PIT_Init(void) 

{

      PITCFLMT_PITE=0; //Close PIT   

      // Loading register of micro timer   

      PITMTLD0 = 80-1; //8-bit timer initial value setting. 80 division, under 80MHzBusClock, is 1MHz, i.e. 1us   

     //PITMTLD1= 160-1; //8-bit timer initial value setting, 160 division, at 16MHz bus clock frequency, 0.1MHz, i.e. 10us   

      //Timer loading register   

      PITLD0  = 1000 - 1 ;//1ms   

      PITLD1 = 8000 - 1; // Timing 8ms  

      PITCE_PCE0=1; //Enable channel 0   

      PITCE_PCE1=1; //Enable channel 1   

      PITMUX_PMUX0=0; //0: The corresponding 16-bit timer is connected to micro time base 0   

      //PITMUX_PMUX1=1; //1: The corresponding 16-bit timer is connected to micro time base 1   

      PITINTE_PINTE0=1; // Enable the overflow interrupt of PIT0 timer       

      PITINTE_PINTE1=1; // Enable the overflow interrupt of PIT1 timer   

      PITCFLMT_PITE=1; //Enable PIT 

}

/***********************************************************

** Name: void main(void)

** Function: Main function

** Input parameters: None

** Export parameters: None

** Instructions for use: None

**********************************************************/ 

void main(void) 

{

        DDRB = 0xff;

        PORTB = 0xff;

        EnableInterrupts;

        PLL_Init();

        PIT_Init();

        for(;;) 

         {

         } 

}

int i = 0, j = 0;

#pragma CODE_SEG __NEAR_SEG NON_BANKED //Indicates that the program is in the non-paged area

    //Timer 0

    void interrupt 66 PIT0(void) 

    {

        DisableInterrupts;

        // Clear interrupt flag

        PITTF = 0x01;

        i++;

        //1s

        if(i == 1000)

        {

                PORTB_PB0 = ~PORTB_PB0;

                i = 0;

        }

        EnableInterrupts;                

    }

    //Timer 1

    void interrupt 67 PIT1(void)       

    {                  

         DisableInterrupts;

         // Clear interrupt flag                 

         PITTF = 0x02;

         j++;

         //2s

         if(j == 250)

         {

                PORTB_PB1 = ~PORTB_PB1;

                j = 0;

         }

         EnableInterrupts;                        

    } 

#pragma CODE_SEG DEFAULT