AD9834 frequency sweeper based on msp430

/*****************************************************
AD9834 Waveform Generation Program
*****************************************************/
#include

#define    FSYNCL   P2OUT &=  ~BIT5  
#define    FSYNCH   P2OUT |=   BIT5  
 
#define    SCLKL    P2OUT &= ~BIT6  
#define    SCLKH    P2OUT |=  BIT6  
#define    SDATAL   P2OUT &=  ~BIT7
#define    SDATAH   P2OUT |=   BIT7
double   data=1000 ;
#define FCLK 50
#define uchar unsigned char
#define uint  unsigned int
#define long unsigned long
int x;
/**************************
Send control word
**************************/
void Send_Con(uint Con_word)
{
flying i;
FSYNCL;
for(i=0;i<16;i++)
{

   if ((Con_word&0x8000)==0x8000)
   {SDATAH;}
     else
        SDATAL ;
    
Con_word<<=1;
SCLKL;
SCLKH;
}
FSYNCH;
}
/****************************************************
Initialization function:
-------------------------------------------------------------------
Function: software bit control, IOUT sine wave, SIGNBITOUT square wave, write FREQREG0, write PHASE0
Send_Con(0x2038) write FREQREG0 once
Send_Con(0x0038) rewrites the LSB of FREQREG0 alone
Send_Con(0x1038) rewrites the MSB of FREQREG0 alone
-------------------------------------------------------------------
Function: Software bit control, IOUT triangle wave write FREQREG0, write PHASE0
Send_Con(0x2002) write FREQREG0 once
Send_Con(0x0002) rewrites the LSB of FREQREG0 alone
Send_Con(0x1008) rewrite the MSB of FREQREG0 alone****************************/

/****************************
Send frequency word
****************************/
void Send_Freq(uint Freq_word)
{
flying i;
FSYNCL;
for(i=0;i<16;i++)
{
if ((Freq_word&0x8000)==0x8000)
   {SDATAH;}
  else
        SDATAL ;
Freq_word<<=1;
SCLKL;
SCLKH;
}
FSYNCH;
}

/*****************************  q
Send phase word
Note: According to the situation, you can set the input parameters and phase
*****************************/
void Send_Phase()
{
Send_Con(0xC000); //Set the initial phase to 0
}


/*******************************************************
Set the frequency value Freq_value(value)=Freq_data(data)*FCLK/2^28
2^28=268435456=0x10000000
*******************************************************/
void zhengxianbo(ulong Freq_value )
{
head value1,value2;
uint LSB_D,MSB_D;
SCLKH;
FSYNCH;
value1= Freq_value;
value2= Freq_value;


LSB_D=(value1%0x4000)+0x4000; //write LSB of FREQ0 REG
MSB_D=(value2/0x4000)+0x4000; //Write the MSB of FREQ0 REG

Send_Con(0x2038);    

//DDS initialization settings, IOUT sine wave, SIGNBITOUT square wave, one-time write FREQREG0
Send_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;x<10;x++)
  {
    if(x==9)
      data=1000;
    else
    data=data+1000*x;
  Freq_value=(ulong)(data*5.3687);
  zhengxianbo(Freq_value);
   for(n=0;n<20000;n++);
  }
  }
}