adc0.c

新华龙单片机C8051F060的AD程序

/******************************************
0v-----34290    0.2v------26280
v=(34290-result)*0.2/(34290-26280)
 =(34290-result)/40050
******************************************/

#include <c8051f060.h>                    

sfr16 ADC0     = 0xBE;                 
#define SYSCLK 22118400                  

void SYSCLK_Init (void);
void PORT_Init (void);
void ADC0_Init(void);
void ad();
//float result[10]={0};
float result;
float v=0;   //输入的实际电压值
unsigned int i=0;
//unsigned int k=0;
void main (void)
{
	WDTCN = 0xde;                          
	WDTCN = 0xad;
	
	SYSCLK_Init ();                        
	PORT_Init ();
	ADC0_Init(); 	
	while(1)                           
	{	
      ad(); 
	}
}

void ad()
{
   char old_SFRPAGE = SFRPAGE;
   SFRPAGE = ADC0_PAGE;               
   AD0INT=0;
   AD0BUSY=1;				//开始ADC转换
   while(AD0INT==0);  //等待转换结束
   //result[i]=ADC0;
   //i++;	
   //if(i>9)i=0;
   result=ADC0;
   v=(34290-result)/40050;
   v=v+v*0.02;  //误差调整
   SFRPAGE = old_SFRPAGE;   
}
void ADC0_Init(void)
{
   char old_SFRPAGE = SFRPAGE;
   int j;
   SFRPAGE = ADC0_PAGE;               
   ADC0CN = 0xC0;  
   //ADC0CN = 0x80;                    
   REF0CN = 0x03;                      
   for(j=0;j<10000;j++);               
   AMX0SL = 0x00;                      
   ADC0CF = (SYSCLK/25000000) << 4;  
   //ADC0CF | =  0x07;  
   SFRPAGE = old_SFRPAGE;             
}

void PORT_Init (void)
{
   char old_SFRPAGE = SFRPAGE;
   SFRPAGE = CONFIG_PAGE;             
   XBR2    = 0x40;                     
   P0MDOUT |= 0xFF;                    
   SFRPAGE = old_SFRPAGE;             
}
  
void SYSCLK_Init (void)
{
   char old_SFRPAGE = SFRPAGE;
   int j; 
   SFRPAGE = CONFIG_PAGE;              
   OSCXCN = 0x67;                     
   for (j=0; j <5000; j++) ;           
   while (!(OSCXCN & 0x80)) ;          
   RSTSRC = 0x04;                      
   CLKSEL = 0x01;                      
   OSCICN = 0x00;                     
   SFRPAGE = old_SFRPAGE;             
}