user_audio.c

在C54X DSP下写的串口收发程序

#include    "user_type.h"
#include	"user_infer.h"
#include	"user_func.h"
#include	"dsplib.h"



s16			in_data;
s16			out_data;
s16			audio_data[100];

short		db[64];
short		*dbptr=&db[0];

short		sh_x[1],sh_r[1];
short		sh_h[64]={
						13,-32,-31,22,52,-16,-84,-9,117,
						55,-142,-128,147,225,-115,-339,30,455,
						123,-551,-359,597,691,-549,-1143,341,1775,
						176,1775,341,-1143,-549,691,597,-359,-551,
						123,455,30,-339,-115,225,147,-128,-142,
						55,117,-9,-84,-16,52,22,-31,-32,13
					  };





void	main(void)
{
	int		i=0;
	int     j=0;
	
	
	for(j=0;j<64;j++)
	{
		db[j]=0;
	}
	sh_r[0]=0;
	
	
	init_board();
	
	while(1)
	{
	
		*(volatile u16 *)SPSA_ADDR(1)=SPCR1_SUBADDR;
		while(!((*(volatile u16 *)SPSD_ADDR(1)) & 0x0002)) 	{};
		in_data=*(volatile u16 *)DRR1_ADDR(1);
		//从MCBSP1串口的DRR11寄存器接收数据
	
		in_data &=0xFFFE;
	
		//for(i=0;i<100;i++)
		//{
		//	audio_data(i)=in_data;
		//}
		//while(i=100)
		//{
		//	i=0;
		//}
		audio_data[i]=in_data;
		i++;
		if(i>=100)	i=0;
	
		//存储100位输入数据作内部测试用
	
		//in_data在DSP内部作各种算法的内部处理
		
		//此处作FIR滤波运算
		sh_x[0]=in_data;
		fir(sh_x,sh_h,sh_r,&dbptr,64,1);
		out_data=sh_r[0];
		
		out_data &=0xFFFE;
	
		*(volatile u16 *)SPSA_ADDR(1)=SPCR2_SUBADDR;
		while(!((*(volatile u16 *)SPSD_ADDR(1)) & 0x0002))	{};
		*(volatile u16 *)DXR1_ADDR(1)=out_data;
	}
}