overflowtest.c

来自「CHP 3 - Real-Time Digital Signal Process」· C语言 代码 · 共 47 行

// 
//  Project: Experiment 3.6.4 Overflow Control - Chapter 3 
//  File name: overflowTest.c   
//
//  Description: This is the experiment test program file 
//
//  For the book "Real Time Digital Signal Processing: 
//                Implementation and Application, 2nd Ed"
//                By Sen M. Kuo, Bob H. Lee, and Wenshun Tian
//                Publisher: John Wiley and Sons, Ltd
//
//  Tools used: CCS v.2.12.07
//              TMS320VC5510 DSK Rev-C
//
//

#define	BUF_SIZE 40

short sineTable[BUF_SIZE]={
    0x0000,0x000f,0x001e,0x002d,0x003a,0x0046,0x0050,0x0059,
    0x005f,0x0062,0x0063,0x0062,0x005f,0x0059,0x0050,0x0046,
    0x003a,0x002d,0x001e,0x000f,0x0000,0xfff1,0xffe2,0xffd3,
    0xffc6,0xffba,0xffb0,0xffa7,0xffa1,0xff9e,0xff9d,0xff9e,
    0xffa1,0xffa7,0xffb0,0xffba,0xffc6,0xffd3,0xffe2,0xfff1}; 
			
extern short ovftest(short, short *); 

extern short buff;   // Use graphic display to show this buffer 256 in size
extern short buff1;  // Use graphic display to show this buffer 256 in size

void main()
{
  short ovrflow_flag;  
  short *ptr=sineTable;

  while(1)
  {	         
    ovrflow_flag=0;
    ovrflow_flag=ovftest(ovrflow_flag, ptr); 
	
    if (ovrflow_flag != 0)         // <- set break point on this line
    {
      ovrflow_flag=ovftest(ovrflow_flag, ptr); 
    }
  }  	                           // <- set break point on this line
}