main.c

实现A/D转换功能,含有实验结果.据有很大的修改空间

/*-----------------------------------------------------*
*工 程 名:AD.prj                                       *
*硬件连接:PTB0/AD0 接模拟量输入端                      *
*程序描述:获取1路A/D转换结果,并滤波,通过串口发送出去   *
*目   的:掌握AD转换的基本编程方法                      *
*注   意:用SD-1实验板测试时,把液晶拔出,否则可能影响结果*
*----------《嵌入式应用技术基础教程》教学实例---------*/
/*[头文件]*/
#include "GP32C.H"
/*[函数声明]*/
extern void SCIInit(void);    //串行口函数声明
extern void SCISend1(unsigned char o);
extern void SCISendN(unsigned char n,unsigned char ch[]);
//有关A/D转换函数声明
extern unsigned char adave(unsigned char n,unsigned char channel); 
extern unsigned char advalue(unsigned char channel);
extern unsigned char admid(unsigned char channel);
/*[主程序]*/
void main(void)
 {  float a;
    int t;
    unsigned char p,b,q;
	SCIInit();         //串行口初始化      
	ADCLK=0b00110000;  //A/D用内部总线时钟,2分频
	while(1){
      
     a=adave(20,0)/51.0;
      t=a*100; 
      SCISendN(14,"通道0电压值是");
      p=t/100;
      SCISend1(p+0x30);
       SCISend1('.');
       b=t%100/10;
      SCISend1(b+0x30);
      q=t%10;
      SCISend1(q+0x30);
      SCISendN(3,"伏");
      for(p=0;p<1000;p++)
        for(b=0;b<250;b++);
         SCISendN(7,"   ");
      a=adave(20,1)/51.0;
      t=a*100; 
      SCISendN(14,"通道1电压值是");
      p=t/100;
      SCISend1(p+0x30);
       SCISend1('.');
       b=t%100/10;
      SCISend1(b+0x30);
      q=t%10;
      SCISend1(q+0x30);
      SCISendN(3,"伏");
       SCISendN(7,"   ");
      }
  }