test20.c

5402开发板附带的源程序

#include "REG5402.h"
unsigned int rrdy,xrdy;
unsigned int data_buffer;

void cpu_init()          /*初始化DSP*/
{
   asm(" ssbx intm");
   PMST=0x3fa0;      
   SWWSR=0x7fff;
   SWCR=0x0000;
   IMR=0; 
   IFR=0xff;   
}
 
void delay()              /*WAIT*/
{
   asm(" STM #0008h, AR0"); 
   asm(" RPT *AR0"); 		
   asm(" NOP");
}    		

void mcbsp_init()
{      
   SPSA1=SPCR11;
   SPSD1=0x0000;
   SPSA1=SPCR21;
   SPSD1=0x0200;
   SPSA1=PCR1;        
   SPSD1=0x000c;            /*PCR1=000CH*/
   SPSA1=SPCR11;
   SPSD1=0x0000;
   SPSA1=SPCR21;
   SPSD1=0x0000;
   SPSA1=RCR11;
   SPSD1=0x0040;            /*RCR1=0040H*/
   SPSA1=RCR21;
   SPSD1=0x0004;            /*RCR2=0004H*/
   SPSA1=XCR11;
   SPSD1=0x0040;            /*XCR1=0040H*/
   SPSA1=XCR21;
   SPSD1=0x0004;            /*XCR2=0004H*/
   delay();  
   DMPREC=DMPREC&0xff3f;    /*BRINT,BXINT*/
   
   DXR11=0;                 
   
   /*启动MCBSp串口*/
   SPSA1=SPCR11;
   SPSD1=0x0001;            
   SPSA1=SPCR21;
   SPSD1=0x0201;
   delay();
}

void aic_init()
{ 
   IMR=IMR|0x0c00;
                       
   DXR11=0x0001;            /*DIN的LSB为1，与AD50二次通讯*/
   xrdy=0;  
   while(!xrdy)           
   {
     SPSA1=SPCR21;
     xrdy=(SPSD1&0x0002)>>1; 
   }
        
   DXR11=0x0100;            /*设置Control3寄存器*/                     
   xrdy=0;
   while(!xrdy)           
   {
     SPSA1=SPCR21;
     xrdy=(SPSD1&0x0002)>>1;
   }
                             
   DXR11=0x0001;           /*DIN的LSB为1，与AD50二次通讯*/
   xrdy=0;
   while(!xrdy)           
   {
     SPSA1=SPCR21;
     xrdy=(SPSD1&0x0002)>>1;
   } 
       
   DXR11=0x0405;            /*设置Control4寄存器*/
   xrdy=0;
   while(!xrdy)           
   {
     SPSA1=SPCR21;
     xrdy=(SPSD1&0x0002)>>1;
   }     
   
   asm(" rsbx intm"); 
   DXR11=DRR11;             /*传送一个哑元，结束操作*/  
}


main()
{
   cpu_init(); 
   mcbsp_init(); 
   aic_init();
   
   for(;;)
   {
      rrdy=0;
      while(!rrdy)
      {
         SPSA1=SPCR11;
         rrdy=(SPSD1&0x0002)>>1;
         data_buffer=DRR11;
         DXR11=data_buffer&0xfffe;
      }
   }          
} 

interrupt void brint1_int()
{
   data_buffer=DRR11;
   DXR11=data_buffer&0xfffe;
} 

interrupt void bxint1_int()
{
   
   asm(" rsbx xf");	
}