sine.c

sine functions test,program is ok and the main functions finish sine wave

/*
 *  Copyright (c) 2001-2002, Texas Instruments Incorporated.
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
*/

/*
 * Description: This application uses Probe Points to obtain input
 * (a sine wave). It then takes this signal, and applies a gain
 * factor to it.
*/ 

#include <stdio.h>
#include "Sine.h"

// gain control variable 
int gain = INITIALGAIN;   

// declare and initalize a IO buffer	   
BufferContents currentBuffer;

// Define some functions 
static void processing();						// process the input and generate output 
static void dataIO();							// dummy function to be used with ProbePoint

#if defined(_TMS320C2XX)
#define WDCR        *((volatile int *)0x7029)    /* WD Control reg */
#define DISABLE_WD  0x0068
/*******************************************************
	Disable_WD()
	============
	
	This function disables the f24xx watch dog timer;
	
*******************************************************/
void Disable_WD(void)
{
    WDCR |= DISABLE_WD;
}
#endif
// main start
void main()
{
#if defined(_TMS320C2XX)
    Disable_WD();
#endif

	puts("SineWave example started.\n");
			
    while(TRUE) // loop forever
    {       
        /*  Read input data using a probe-point connected to a host file. 
            Write output data to a graph connected through a probe-point. */
        dataIO();
        
        /* Apply the gain to the input to obtain the output */
        processing();
    }
}

/*
 * FUNCTION:		Apply signal processing transform to input signal 
 *			 		to generate output signal
 * PARAMETERS: 		BufferContents struct containing input/output arrays of size BUFFSIZE
 * RETURN VALUE: 	none.
 */
static void processing()
{
    int size = BUFFSIZE;

    while(size--){
        currentBuffer.output[size] = currentBuffer.input[size] * gain;	// apply gain to input
    }
}

/*
 * FUNCTION: 		Read input signal and write processed output signal
 *					using ProbePoints
 * PARAMETERS: none.
 * RETURN VALUE: none.
 */
static void dataIO()
{
    /* do data I/O */
    return;
}