按钮控制灯的亮.txt

msp430 it s my code!please read it,thank you!

//******************************************************************************
//  MSP430F22x4 Demo - Software Port Interrupt Service on P1.3 from LPM4
//
//  Description: A hi/low transition on P1.3 will trigger P1_ISR which,
//  toggles P1.0. Normal mode is LPM4 ~ 0.1uA. LPM4 current can be measured
//  with the LED removed, all unused Px.x configured as output or inputs
//  pulled high or low, and ensure the P1.3 interrupt input does not float.
//  ACLK = n/a, MCLK = SMCLK = default DCO
//
//               MSP430F22x4
//            -----------------
//        /|\|              XIN|-
//         | |                 |
//         --|RST          XOUT|-
//     /|\   |                 |
//      --o--|P1.3         P1.0|-->LED
//     \|/
//
//  A. Dannenberg
//  Texas Instruments Inc.
//  April 2006
//  Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.41A
//******************************************************************************
#include "msp430x22x4.h"
volatile unsigned int i=0;
volatile unsigned int j=0;
void main(void)
{P1OUT=0;
  WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog timer
  P1DIR |= 0x01;                            // Set P1.0 to output direction
  P1IE |= 0x08;                             // P1.3 interrupt enabled
  P1IES |= 0x00;                            // P1.3 Hi/lo edge
  P1IFG &= ~0x08;                           // P1.3 IFG cleared
  __bis_SR_register(LPM4_bits + GIE);  // Enter LPM4 w/interrupt

}

// Port 1 interrupt service routine
#pragma vector=PORT1_VECTOR
__interrupt void Port_1(void)
{
  P1OUT =1 ;                           // P1.0 = toggle
  P1IFG &= ~0x08;
  TBCTL=TBSSEL1+TAR+MC0;
  TBCCTL0=CCIE;
  TBCCR0=50000;
  __bis_SR_register(LPM0_bits+GIE);
  return;
}
#pragma vector = TIMERB0_VECTOR           
__interrupt void Timer_B(void)
{  
      if(j==0)
        {
          i++;
          if(i==20)
          {   
            P1OUT =0;                           //LED翻转
            TBCCR0 +=50000;
              i=0;
               TBCTL=0X0000; 
               j++;
          } 
        }
      else
      {
        i++;
        if(i==40)
        {
          P1OUT =0;                           //LED翻转
           TBCCR0 +=50000;
            i=0;
            P1OUT =0;
               TBCTL=0X0000;
                  j=0;
          } 
         }
}