ad.c.txt

一个AD9851的驱动。用的并行时序。 现在把程序和电路图发上来

#include <iom32v.h>   
#include <macros.h> 
#include "ad9851.h" 
void main(void) 
{        unsigned char test[5]={0x09,0x80,0x0,0x0,0x0};         
        unsigned char i,j; 
        ConDdr=0xff; 
        DDRA=0xff; 
        for(i=0;i<200;i++) 
        for(j=0;j<200;j++); 
        AD9850WriteBytes(test); 
        while(1); 
} 
********************************* 
ad9851.h 
******************************** 
#define ConPort PORTC 
#define ConDdr DDRC 

#define FQ_UD PA1 
#define W_CLK PA2 
#define RESET PA3 

#define SetW_CLK()        ConPort|=1<<W_CLK 
#define ClrW_CLK()        ConPort&=~(1<<W_CLK) 
#define SetFQ_UD()        ConPort|=1<<FQ_UD 
#define ClrFQ_UD()        ConPort&=~(1<<FQ_UD) 
#define SetRESET()        ConPort|=1<<RESET 
#define ClrRESET()        ConPort&=~(1<<RESET) 

void delay_us(unsigned char n){ 
         while(n) n--;          
} 
void AD9850WriteBytes(unsigned char *byte) 
{ 
        unsigned char i; 
        CLI();         
        SetRESET();//复位 
        delay_us(3); 
        ClrRESET();         
         
        ClrFQ_UD();         
        ClrW_CLK(); 
        delay_us(10);         
        for(i=0;i<5;i++) 
        { 
                ConPort=byte[i];                 
                delay_us(10); 
                 
                SetW_CLK(); 
                delay_us(10); 
                 
                ClrW_CLK(); 
                delay_us(10); 
        }         
        SetFQ_UD(); 
        delay_us(3); 

        ClrFQ_UD(); 
        delay_us(3); 
         
        SEI(); 
} 


 
 (原文件名:20084312531224814.jpg)