msp430的AD9851程序+频率计算工具

//AD9851(综合修改) #include<msp430X16x.h> #define W_CLK BIT0 #define FQ_UD BIT1 #define RESET BIT2 #define HZ 0 #define MHZ 1 #define CPU_F ((double)8000000) #define DELAYUS_nus(x) __delay_cycles((long)(CPU_F*(double)x/1000000.0)); #define DELAYUS_nms(x) __delay_cycles((long)(CPU_F*(double)x/1000.0)); /***频率算法公式*****/ /****f是输出的频率****//*******32位控制字为：Fm ＝(f*0xFFFFFFFF)/内部时钟 *******/ unsigned long int Fm; unsigned int Fn=0x00; unsigned char CW[]={0x00,0x00,0x00,0x00,0x00};//（W0）（W4 W3 W2 W1）高——低） //Fm、Fn计算 void GetFm(unsigned long int t,unsigned char hz) { if(hz==0) Fm=(unsigned long int)(t*107.359); else Fm=t*107359000; } void GetFn(unsigned int t) { Fn=t*32/360; } //unsigned char CW[5]={0x00,0x00,0x00,0x00,0x00}; /* *void delays() *{ * unsigned int i; * for(i=2;i>0;i++); * *} */ //430端口初始化 void _430PORT_INIT() { P3DIR|=0XFF; P3SEL=0; P3OUT=0; P1DIR|=W_CLK+FQ_UD+RESET; P1SEL=0; P1OUT&=~(W_CLK+FQ_UD+RESET); } //送控制字 void CW_DOWNLOAD() { unsigned int i; for(i=0;i<5;i++) { P1OUT &=~ W_CLK; DELAYUS_nus(10); P3OUT=CW[i]; P1OUT |= W_CLK; DELAYUS_nus(10); } P1OUT&=~W_CLK; } //控制字设定 void CW_SET(unsigned long int t,unsigned int p) { CW[0]=0X08; //不开倍乘 <3 | 0xF8; CW[1]=t>>24&0x000000FF; CW[2]=t>>16&0x000000FF; CW[3]=t>>8&0x000000FF; CW[4]=t&0x000000FF; } //主函数 void main() { WDTCTL=WDTPW+WDTHOLD; P3DIR=0xFF; P3SEL=0; P1DIR|=RESET; P1SEL=0; P1OUT|=RESET; DELAYUS_nus(10); P1OUT&=~RESET; DELAYUS_nus(10); _430PORT_INIT(); P1OUT &=~ FQ_UD; DELAYUS_nus(10); P1OUT &=~ W_CLK; DELAYUS_nus(10); GetFm(200000,HZ);//设定输出频率为50K GetFn(30); //设定相位 CW_SET(Fm,Fn); //分离四字节程序 CW_DOWNLOAD(); //送控制字 DELAYUS_nus(5); P1OUT|=FQ_UD; DELAYUS_nus(10); P1OUT&=~FQ_UD; DELAYUS_nus(10); while(1); }