单片机控制AD9850的信号发生器C51程序可直接用.doc

单片机控制AD9850的数字信号发生器C51程序 单片机控制AD9850的数字信号发生器C51程序 //-----------------------函数声明，变量定义------------------------------#include?reg51.h #include?intrins.h #includeABSACC.H???????? //-----------------------定义管脚---------------------------------------- #define??data_OUT?P1 sbit?FQ_UD=P3^0;??????????//AD9850信号更新申请? sbit?W_CLK=P3^1;??????????//写控制字时钟 unsigned?char?CON_word[5];? //Word????data[7]????data[6]????data[5]????data[4]????data[3]????data[2]????data[1]????data[0] //W0?????Phase?b?????Phase?b3?????Phase?b2?????Phase?b1????Phase?b0?????Power?Down?????Control????????Control //W1????Freq-b31????Freq-b30????Freq-b29????Freq-b28????Freq-b27????Freq-b26????Freq-b25????Freq-b24 //W2????Freq-b23????Freq-b22????Freq-b21????Freq-b20????Freq-b19????Freq-b18????Freq-b17????Freq-b16 //W3????Freq-b15????Freq-b14????Freq-b13????Freq-b12????Freq-b11????Freq-b10????Freq-b9????Freq-b8 //W4????Freq-b7????????Freq-b6????????Freq-b5????????Freq-b4????????Freq-b3????????Freq-b2?????? //-------------------------------------------------------------------------------------------------- //?函数名称：?delay //?入口参数：?N //?函数功能：延时子程序，实现(16*N+24)us的延时? //?系统采用11.0592MHz的时钟时,延时满足要求,其它情况需要改动 //-------------------------------------------------------------------------------------------------- ??void?delay(unsigned??int?N)?? ??{ ??int?i;? ??for(i=0;iN;i++); ??} //-------------------------------------------------------------------------------------------------- //?函数名称：?WRITE_AD9850 //?函数功能：?将控制字写入AD9850 //-------------------------------------------------------------------------------------------------- void?WRITE_AD9850(void) {?? ?????unsigned?char?i; ?????FQ_UD=0; ?????W_CLK=0; ?????delay(0); ?????CON_word[0]=CON_word[0]0xFC;?//置工作方式选择位为00 ?????for(i=0;i5;i++) ?????{ ?????data_OUT=CON_word[i];??????//送控制字? ?????W_CLK=0; ?????delay(0); ?????W_CLK=1;???????????????????//上升延 ?????delay(0); ?????} ?????FQ_UD=1;???????????????//上升延要求AD9850改变输出 }? //----------------