fircirc.c

来自「DSP原理及其C编程开发技术的源码 真的很好呀」· C语言 代码 · 共 22 行

//FIRcirc.c  C program calling ASM function using circular buffer 

#include "bp1750.cof"  	            //BP at 1750 Hz coeff file
int yn = 0;				      //init filter's output

interrupt void c_int11()            //ISR
{
 short sample_data;

 sample_data = input_sample();      //newest input sample data
 yn = fircircfunc(sample_data,h,N); //ASM func passing to A4,B4,A6
 output_sample(yn >> 15);	      //filter's output
 return;				      //return to calling function
}

void main()
{
 comm_intr();			      //init DSK, codec, McBSP
 while(1);                 	      //infinite loop
}