基于msp430的AD9834掃頻儀

/*****************************************************AD9834波形產(chǎn)生程序*****************************************************/#includeMSP430x16x.h>#define    FSYNCL   P2OUT =  ~BIT5  #define    FSYNCH   P2OUT |=   BIT5  #define    SCLKL    P2OUT = ~BIT6  #define    SCLKH    P2OUT |=  BIT6  #define    SDATAL   P2OUT =  ~BIT7#define    SDATAH   P2OUT |=   BIT7double   data=1000 ;#define FCLK 50#define uchar unsigned char#define uint  unsigned int#define ulong unsigned longint x;/**************************發(fā)送控制字**************************/void Send_Con(uint Con_word){uchar i;FSYNCL;for(i=0;i16;i++){if ((Con_word0x8000)==0x8000){SDATAH;}elseSDATAL ;Con_word=1;SCLKL;SCLKH;}FSYNCH;}/****************************************************初始化函數(shù)：-------------------------------------------------------------------功能：軟件位控制，IOUT正弦波，SIGNBITOUT方波，寫FREQREG0，寫PHASE0Send_Con(0x2038)   一次性寫FREQREG0Send_Con(0x0038)   單獨改寫FREQREG0的LSBSend_Con(0x1038)   單獨改寫FREQREG0的MSB-------------------------------------------------------------------功能：軟件位控制，IOUT三角波寫FREQREG0，寫PHASE0Send_Con(0x2002)   一次性寫FREQREG0Send_Con(0x0002)   單獨改寫FREQREG0的LSBSend_Con(0x1008)   單獨改寫FREQREG0的 MSB*************************//****************************發(fā)送頻率字****************************/void Send_Freq(uint Freq_word){uchar i;FSYNCL;for(i=0;i16;i++){if ((Freq_word0x8000)==0x8000){SDATAH;}elseSDATAL ;Freq_word=1;SCLKL;SCLKH;}FSYNCH;}/*****************************  q發(fā)送相位字注：根據(jù)情況可設(shè)定入口參數(shù)，設(shè)置相位*****************************/void Send_Phase(){Send_Con(0xC000);   //設(shè)置初相位為0}/*******************************************************設(shè)置頻率值   Freq_value(value)=Freq_data(data)*FCLK/2^282^28=268435456=0x10000000*******************************************************/void zhengxianbo(ulong Freq_value ){ulong value1,value2;uint LSB_D,MSB_D;SCLKH;FSYNCH;value1= Freq_value;value2= Freq_value;LSB_D=(value1%0x4000)+0x4000;  //寫FREQ0 REG 的LSBMSB_D=(value2/0x4000)+0x4000;   //寫FREQ0 REG 的MSBSend_Con(0x2038);    

//DDS初始化設(shè)置，IOUT正弦波，SIGNBITOUT方波，一次性寫FREQREG0Send_Freq(LSB_D); Send_Freq(MSB_D);void Send_Phase();}void main(){uint n;static ulong x=0;static ulong Freq_value;WDTCTL=WDTPW+WDTHOLD;P2DIR=0Xff;while(1){for(x=0;x10;x++){if(x==9)data=1000;elsedata=data+1000*x;Freq_value=(ulong)(data*5.3687);zhengxianbo(Freq_value);for(n=0;n20000;n++);}}}