wadc0.c

c8051f020源代码39个 使用Silicon Labs IDE 调试器

//参考程序B.WADC0.c程序模/数转化通道AIN0.0的输入值，数码管显示两位16进制数.
//测试前将S6的第一拨码开关拨到ON
#include <c8051f020.h>                  
sfr16 TMR3RL  = 0x92;     
sfr16 TMR3     = 0x94;              
sfr16 ADC0     = 0xbe;        
#define SYSCLK 2000000         
bit LCDBit;
unsigned long x;
void PORT_Init (void);
void Timer3_Init (int counts);
void ADC_Init(void);
void ADC_ISR (void);
void LCD_Init(void);
void main (void) {
	unsigned char data1,i;
	unsigned char *lcdpoint;   	//指向 lcddata数组的指针
	unsigned char ADC0Data[10]={0x0a,0x0d,0x0c,0x00,0x68,0x68};
   WDTCN = 0xde;
   WDTCN = 0xad;   	//禁止看门狗定时器
	LCDBit=0;
  // PORT_Init();
   LCD_Init();
   Timer3_Init (SYSCLK / 12 /5 );  
   ADC_Init();                                     
   EA = 1;									
     AMX0SL =0x00;         	//选择通道0
     for(x=0;x<=50000;x++); 
	 /*
	 AMX0SL =0x01;         				//选择通道1
	 for(i=0;i<=50000;i++); 
	 AMX0SL =0x02;         				//选择通道2
	 for(i=0;i<=50000;i++); 
	 AMX0SL =0x03;         				//选择通道3
	 */
   while (1)
    {
	 	if(LCDBit==1){
			TMR3CN &= 0xfb; 				//关定时器3                  
			LCDBit=0;						//清LCD显示位
	   		P7 = 0x02;						//LCD指针返回初始位置
   			P6 = 0x0;
   			P6 = 0x1; 
			ADC0Data[9]=ADC0&0x0f;			//将A/D转化值存到显示数组
			ADC0Data[8]=(ADC0>>4)&0x0f;
			ADC0Data[7]=(ADC0>>8)&0x0f;
			ADC0Data[6]=(ADC0>>12)&0x0f;
	    	P6  = 0x05;                   	//准备送数据
	    	for(x=0;x<5000;x++);
	    	lcdpoint = &ADC0Data;
	    	for(i=10;i>0;i--)     			//显示第一行字符
	    	{ 
		    	data1=*lcdpoint;
		if(data1>=0x0a) data1 += 0x37;	//将显示数据转化为液晶的显示字符码
				else data1 += 0x30;
		    	P7 = data1; 
				P6 = 0x04;
	        	P6 = 0x05;
	        	lcdpoint++;
				for(x=0;x<100;x++);
			}
		   TMR3CN |= 0x04;					//使能定时器3                   
		}                  
	}
}
void LCD_Init(void)
{
   P6 = 0x01;
   for(x=0;x<50000;x++);
   //P7 = 0x30;				/*一行显示*/
   P7 = 0x38;				/*两行显示*/
   P6 = 0x0;
   P6 = 0x1; 
   for(x=0;x<1000;x++);
   P7 = 0x0e;				//开显示，开光标，字符不闪烁
   P6 = 0x0;
   P6 = 0x1;
   for(x=0;x<1000;x++);		
   P7= 0x016;				//AC自动增1，整体显示不移动
   P6 = 0x1;
   P6 = 0x01;
   for(x=0;x<5000;x++);		
   P7 = 0x01;				//清除DDRAM,置AC=0
   P6 = 0x00;
   P6 = 0x01; 
   for(x=0;x<5000;x++);
}
void PORT_Init (void)
{
   XBR2    = 0x40;  		//使能交叉开关                   
   P74OUT |= 0x0ff;     	//推挽输出
}
void Timer3_Init (int counts)
{
   TMR3CN = 0x00;           //定时器T3使用系统时钟的12分频.禁止T3           
   TMR3RLL  = -counts;  		//初始化重载值           
   TMR3L    = 0xffff; 		//设置自动重载值                 
   TMR3CN |= 0x04;          //允许定时器T3         
}
void ADC_Init(void)
{
 ADC0CN  |=0x84;	/*ADC0使能，定时器T3溢出使能模/数转换*/
 REF0CN |=0x03;		/*内部电压基准提供从VREF脚输出，ADC0电压基准取自VREF0*/
 ADC0CF |=0x50;		/*转换周期为一个时间系统,增益为1*/
 AMX0CF |=0x00;		/*单端输入*/
 EIE2   |=0x02;		/*ADC0转换结束中断*/
}
void ADC_ISR (void) interrupt 15
{
  AD0INT=0;			//清A/D中断标志
  LCDBit=1;			//置LCD显示位
}