MSP430 uses ADC10 to measure the voltage of the temperature diode inside the chip

MSP430 uses ADC10 to measure the voltage of the temperature diode inside the chip
#include "msp430x22x4.h" 
//This program uses ADC10 to measure the voltage of the temperature diode inside the chip 
//Execute the program to view the value of the ADC10MEM register, 
//and use the formula V(temp)=0.00355*TempC+0.986 to calculate the chip temperature 
//Finally, the ad sampling value is stored in ad_value, and the temperature value is stored in value. Set breakpoints to view each count value

// MSP430F2274 
// ----------------- 
// /|\| XIN|-   
// | | | 
// --|RST XOUT|- 
// | | 
/ / | P1.0|-->LED 
float ad_value; 
float value; 
int a[]={0xc0,0xf9,0xa4,0xb0,0x99,0xa92,0x82,0xf8,0x80,0x90};/*Common Yang*/ 
/ /int a[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};/*Common Yin*/ 
int p1,p2,p3,p4; 
int m,i; 
void delay () 
{ 
  for(i=0;i<=100;i++); 
} 
int main( void ) 
{   
  WDTCTL=WDTPW+WDTHOLD; //Turn off the watchdog 
  BCSCTL1 =CALBC1_1M Hz ; //Set DCO to 1MHZ 
  DCOCTL =CALBC1_1MHZ; 

  P3SEL=0x00; 
  P3DIR=0xff; 
  P3OUT=BIT0+BIT1+BIT2+BIT3; 

  P4SEL=0x00; 
  P4DIR=0xff; 
  P4OUT=0x00; 

  TACTL|=TASSEL0; 
  TACTL|= TACLR;                     
  CC TL0 |=CCIE;                           
  CCR0 =32768;  

  ADC10CTL1=INCH_10; //Select channel 10, which is the internal temperature sensor 
  ADC10CTL0=REFON+SREF_1; //Turn on 1.5V positive reference, ground as negative reference 
  ADC10CTL0 |=ADC10ON+ADC10SHT_3+ADC10IE; //Open the ADC10 core, set the sampling and holding time to 64 ADC10CLK, enable ADC10 interrupt 
  ADC10CTL0 |=ENC+ADC10SC; //Start AD conversion_BIS_SR 
  (GIE+CPUOFF); //Open the general interrupt and enter the low power 
  value =((ad_value*1.5/1023)-0.986)/0.00355; //Calculate temperature 

  p1=(int)value/10; 
  p2=(int)value%10; 
  m=(int)(value*100)%100; 
  p3=m/10; 
  p4=m%10; 
  while(1) 
  { 
   P3OUT=BIT3; 
   P4OUT=a[p1]; 
   delay(); 
   P3OUT=BIT2; 
   P4OUT=a[p2]; 
   delay(); 
   P3OUT=BIT2 ; 
   P4OUT=0x7f; 
   delay(); 
  P3OUT=BIT1; 
  P4OUT=a[p3]; 
   delay(); 
  P3OUT=BIT0; 
   P4OUT=a[p4]; 
   delay(); 
  }   
} 

#pragma vector = ADC10_VECTOR //ADC10 interrupt service__interrupt 
void adc_isr(void) 
{ 
 ad_value=ADC10MEM; 
 _B IC _SR_ IRQ (CPUOFF); 
}