f330_ad.cpp

功能：ADC采样 目标板: C8051F33x 开发工具: Silicon Laboratories IDE 此程序为ADC转换程序

        No.1  

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已测试通过新华龙写的F330_AD转换程序 .
//-----------------------------------------------------------------------------
// ADC.c
//-----------------------------------------------------------------------------
// 版权归新华龙电子有限公司所有
//
// 作者：Robi Ken 
// 日期: 2004.12.28
//
// 功能：ADC采样
// 目标板: C8051F33x
// 开发工具: Silicon Laboratories  IDE 
//
//-------------------------------------------------------------------------------------
//程序功能
//------------------------------------------------------------------------------------
//此程序为ADC转换程序，可以选择向ADC0BUSY写1或用定时器0,1,2,3作为ADC的启动信号。
//
//------------------------------------------------------------------------------------
//头文件定义
//------------------------------------------------------------------------------------
//
#include <c8051f330.h>               
#include <stdio.h>

//-----------------------------------------------------------------------------
// 定义16位特殊功能寄存器
//-----------------------------------------------------------------------------

sfr16 ADC0     = 0xbd;                
sfr16 TMR0RL   = 0xca;                                                                                               
sfr16 TMR1RL   = 0xca;                 
sfr16 TMR2RL   =0xca;                 
sfr16 TMR3RL   =0xca;               
sfr16 TMR0     = 0xCC;              
sfr16 TMR1     = 0xCC;                
sfr16 TMR2     = 0xcc;               
sfr16 TMR3     = 0xcc;               
//-----------------------------------------------------------------------------
// 全局变量定义
//-----------------------------------------------------------------------------
char i;
int result;                       
//-----------------------------------------------------------------------------
//定义常量
//-----------------------------------------------------------------------------
#define SYSCLK       49000000        
#define SAMPLE_RATE  50000             
//------------------------------------------------------------------------------------
// 定义函数
//------------------------------------------------------------------------------------
void SYSCLK_Init (void);
void PORT_Init (void);
void Timer0_Init (int counts);
void Timer1_Init (int counts);
void Timer2_Init (int counts);
void Timer3_Init (int counts);
void ADC0_Init(void);
void ADC0_ISR (void);
void ADC0_CNVS_ADC0h(void);
//------------------------------------------------------------------------------------
// 主程序
//------------------------------------------------------------------------------------

void main (void) 
{   
    int ADCRESULT[50] ;
                     
    PCA0MD &= ~0x40;                       // 禁止看门狗              
  
   SYSCLK_Init ();                   
  
   PORT_Init ();
 
   Timer0_Init (SYSCLK/SAMPLE_RATE);  
   //Timer1_Init (SYSCLK/SAMPLE_RATE);     //选择相应的启动方式
   //Timer2_Init (SYSCLK/SAMPLE_RATE); 
   //Timer3_Init (SYSCLK/SAMPLE_RATE);       
   ADC0_Init();
   EA=1;
   while(1)
            {
    
 //ADC0_CNVS_ADC0h(); 
 ADCRESULT=result;                   //此处设断点，观察ADCRESULT的结果
          }
   }
//------------------------------------------------------------------------------------
// 端口初始化
//------------------------------------------------------------------------------------
void PORT_Init (void)
{
    //#pragma asm
   // MOV P0MDOUT,#01H
 //#pragma endasm
    P0MDIN  = 0x00;                   
    P0SKIP =  0x03;
    P0MDOUT = 0x01;
 P1SKIP  = 0xff;                                                      
    XBR1    = 0x40;                     
}
//-----------------------------------------------------------------------------
// 系统时钟初始化
//-----------------------------------------------------------------------------
void SYSCLK_Init (void)
{
   OSCICN |= 0x03;                                                           
   RSTSRC  = 0x04;                     
}
//-----------------------------------------------------------------------------
// 定时器0初始化
//-----------------------------------------------------------------------------
void Timer0_Init (int counts)
{
    TMOD=0x11;                        
    CKCON |= 0x08;                      
    TMR0RL  = -counts;                  
    TMR0    = TMR0RL;                   
    ET0=0;                            
    TR0=1;                            
}
//-----------------------------------------------------------------------------
// 定时器1初始化
//-----------------------------------------------------------------------------
void Timer1_Init (int counts)
{
   TMOD=0x11;                        
   CKCON |= 0x04;                   
   TMR1RL  = -counts;               
   TMR1    = TMR1RL;                   
   ET1= 0;                            
   TR1=1;                        
}
//-----------------------------------------------------------------------------
//定时器2初始化
//-----------------------------------------------------------------------------
void Timer2_Init (int counts)
{
   CKCON |= 0x10;                  
   TMR2RL  = -counts;                 
   TMR2    = TMR2RL;                
   ET2= 0;                            
   TR2=1;                       
}
//-----------------------------------------------------------------------------
//  定时器3初始化
//-----------------------------------------------------------------------------
void Timer3_Init (int counts)
{
    TMR3CN = 0x00;                                   
   CKCON |= 0x40;                 

   TMR3RL  = -counts;                 
   TMR3    = TMR3RL;                   
   EIE1 &= ~0x80;                      
   TMR3CN |= 0x04;                    

}
//-----------------------------------------------------------------------------
// ADC0初始化
//-----------------------------------------------------------------------------
void ADC0_Init (void)
{
  
   ADC0CN =0x81;     //ADCOCN中的值为80，81，83，82,85时分别为向AD0BYSY写1，                                                                    
   AMX0P  = 0x01;     //定时器0，1，2，3溢出作为启动信号                      
   AMX0N  = 0x11;     //AMX0P为通道选择                                                                
   ADC0CF = (SYSCLK/3000000) << 3;       
   ADC0CF &=~0x04;                 
   REF0CN = 0x03;                                                         
   EIE1 |= 0x08;                      
}
//-----------------------------------------------------------------------------
// 向ADC0写1将启动转换
//-----------------------------------------------------------------------------
void ADC0_CNVS_ADC0h(void)
  {
    AD0BUSY = 1;
 
   }
//-----------------------------------------------------------------------------
// ADC中断处理
//-----------------------------------------------------------------------------
 void ADC0_ISR (void) interrupt 10
 {
   AD0INT =0;      
   result= ADC0H;
 }