MSP430F149学习之路——比较器Comparaor_A

代码一：

 #include <msp430x14x.h>
 int flag = ;
 void int_clk()
 {
   BCSCTL1 &= ~XT2OFF;
   BCSCTL2 |= SELM_2 + SELS;
   do
   {
     IFG1 &= ~OFIFG;
     for(int i=;i<;i++)
       _NOP();
   }while((IFG1 & OFIFG)!=);
   IFG1 &= ~OFIFG;
 }

 void int_COMPARATORA()
 {
   P2SEL |= BIT3 + BIT4;               //P2.3,P2.4分别作为比较器的输出和输入
   P2DIR |= BIT3;                      //P2.3作为输出

   CACTL1 &= ~CAEX;
   CACTL1 |= CARSEL + CAREF_2 + CAON + CAIES + CAIE;
   CACTL2 |= CAF + P2CA1;              //使能输出滤波器,CA1作为比较器的输入功能
 }
 #pragma vector=COMPARATORA_VECTOR
 __interrupt void COMPARATORA(void)
 {
   flag = ;
 }

 void main()
 {
   WDTCTL = WDTPW + WDTHOLD;
   P6DIR = 0XFF;
   P6OUT = 0X00;
   int_clk();
   int_COMPARATORA();
   _EINT();
   while()
   {
     while(flag)
     {
       P6OUT ^= 0XFF;
       flag = ;
     }
   }
 }

代码二：

 #include <msp430x14x.h>
 void main()
 {
   WDTCTL = WDTPW + WDTHOLD;
   P2SEL |= BIT3;
   P1DIR |= BIT2;
   P1OUT &= ~BIT2;

   CACTL1 = CAEX + CARSEL + CAREF_2 + CAON;
   CACTL2 = CAF + P2CA1;

   while()
   {
     if(CAOUT==)
       P6OUT = BIT0;
     else
       P6OUT = BIT7;
   }
 }