max530.c

51单片机控制12位DA_MAX530的程序

#include <reg52.h>
#include <absacc.h>

#define MAX530_H XBYTE[0x800D]
#define MAX530_L XBYTE[0x8005]

unsigned char *addr_530_H;
unsigned char *addr_530_L;
           //启动MAX530函数
void max530(int data)
{
           if(c_set*3%2==0)//发数据单元结果2
           {
             *addr_530_H=*(addr_RAM-c_set*3/2);
             P3_4=0;//发LDAC脉冲
             P3_4=1;
             *addr_530_L=*(addr_RAM-c_set*3/2+2)>>4;
             P3_4=0;//发LDAC脉冲
             P3_4=1;
            }
           else//发数据单元结果1
           {
             *addr_530_H=*(addr_RAM-c_set*3/2-2);
             P3_4=0;//发LDAC脉冲
             P3_4=1;
             *addr_530_L=*(addr_RAM-c_set*3/2-1);;
             P3_4=0;//发LDAC脉冲
             P3_4=1;
           }
         }
     }
void initiate()
     {
        unsigned char *AD;
        AD=&MAX197;
        //单片机初始化
        IE=0x0f;
     	IP=0x0e;
        TCON=0x05;
     	TMOD=0x12;
     	TH1=0x3c;
     	TL1=0xb0;
        TL0=0xce;
        EA=1;
      	TR0=1;
        TR1=1;
     }

main()
{
   initiate();
   addr_530_H=&MAX530_H;//MAX530高位地址
   addr_530_L=&MAX530_L;//MAX530低位地址
   while(f_key)
   {
         //功能待定
   }
}