tst.c

来自「凌阳单片机控制的DDS芯片AD9851（串行和并行控制方式）」· C语言 代码 · 共 53 行

#include"spce061a.h"
#define  w_clk 0x0100  //控制字载入时钟，上升沿
#define FQ_UD 0x0200  //频率转换控制，上升沿
#define  RESET 0x0400  //复位
/*typedef struct
{  unsigned int W0;
   unsigned int W1;
   unsigned int W2;
   unsigned int W3;
   unsigned int W4;
}ctrl_word;
ctrl_word *cmd_word;*/
main()
{  
	/*cmd_word->W0=0x0009;
	cmd_word->W1=0x000e;
	cmd_word->W2=0x0038;
	cmd_word->W3=0x00e3;
	cmd_word->W4=0x008e;*/
   *P_SystemClock=0x0080;
	*P_IOA_Dir=0xffff;
	*P_IOA_Attrib=0xffff;
	*P_IOA_Data=0x0000;
    *P_IOA_Data=*P_IOA_Data|RESET;
    delay(10);
	*P_IOA_Data=0xffff;
	while(1)
  {	
	*P_IOA_Data=0x0009;//W0
	*P_IOA_Data|=w_clk;
	   delay(2);	   
	*P_IOA_Data=0x000e;//w1
    *P_IOA_Data|=w_clk;	
	   delay(2);
	*P_IOA_Data=0x0038;//w2
	*P_IOA_Data|=w_clk;
	  delay(2);
	*P_IOA_Data=0x00e3;//w3
	*P_IOA_Data|=w_clk;
	    delay(2);
	 *P_IOA_Data=0x008e;//w4
	 *P_IOA_Data|=w_clk;
	     delay(2);
	   *P_IOA_Data=FQ_UD;
	    delay(10);
	    *P_Watchdog_Clear=0x0001;
     }
}
void delay(unsigned int time)
{    
	while(time--)
		*P_Watchdog_Clear=0x0001;
}