#include"msp430xg43x.h"

// u/d--P2.0
//inc--P2.1
//cs--P2.2

void delay(unsigned char n){
  unsigned char a;
  for(a=n;a>0;a--);
}


void a9312set(unsigned char x,unsigned char y){  //x=1-99  y:0--電阻減,1--電阻加
  unsigned char i;
  switch(y){
  case 0 :P2OUT&=~BIT0;break;//U/D=0 減
  case 1: P2OUT|=BIT0;break; //加
     default : break;
  }
  
  P2OUT&=~BIT2;//CS=0
  for(i=0;i<x;i++){
    P2OUT&=~BIT1 ;
    delay(50);
    P2OUT|=BIT1 ;
    delay(50);
  }
  
  P2OUT|=BIT2;
 //  P2OUT|=BIT1;
  }