volume.c

基于TMS320C5410的BIOS测试程序

/*
 *  Copyright 1999 by Texas Instruments Incorporated.
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *  U.S. Patent Nos. 5,283,900  5,392,448
 */
/* "@(#) BIOS-C54x 3.01b 09-07-99 (bios54x-b15)" */
/***************************************************************************/
/*                                                                         */
/*     V O L U M E . C                                                     */
/*                                                                         */
/*     Audio gain processing using CLK ISR as data source, and a software  */
/*     interrupt for processing routine.                                   */
/*                                                                         */
/***************************************************************************/


#include <std.h>
#include <log.h>   
#include <swi.h>
#include <clk.h>  
#include <prd.h>
#include <stdio.h>

#define BUFSIZE 100
#define MINGAIN 1  
#define BASELOAD 6

/* Global declarations */
int inp_buffer[BUFSIZE];       /* processing data buffers */
int out_buffer[BUFSIZE];

int gain = MINGAIN;             /* volume control variable */
unsigned processingLoad = BASELOAD;  /* processing routine load value */


/* Objects created by the Configuration Tool */
extern LOG_Obj trace;
extern SWI_Obj processing_SWI; 


/* Functions */
extern void load(unsigned loadValue);

int processing(int *input, int *output);
void dataIO();
void test();  

int i;

/*
 * ======== main ========
 */
void main()   
{

     LOG_printf(&trace,"new volume example started\n");
      
     for(i=0;i>=100;i++)
     {
       inp_buffer[i]=i;
      }
           /* fall into DSP/BIOS idle loop */
    return;
}                  

/*
 *  ======== processing ========
 *
 * FUNCTION: Called from processing_SWI to apply signal processing
 *           transform to input signal.
 *
 * PARAMETERS: address of input and output buffers.
 *
 * RETURN VALUE: TRUE.
 */
int processing(Int *input, Int *output)
{
    int size;
   
    size = BUFSIZE;
    

    while(size--){
        *output++ = *input++ * gain;
    }
	LOG_printf(&trace,"input interrrupt\n");
     

    /* additional processing load */ 
       
   load(processingLoad);  
                                   
    return(1);
}

/*
 *  ======== dataIO ========
 *
 * FUNCTION: Called from timer ISR to fake a periodic hardware interrupt that
 *           reads in the input signal and outputs the processed signal.
 *
 * PARAMETERS: none.
 *
 * RETURN VALUE: none.   
 */

void test()
{
  return;
 }
void dataIO()
{
 SWI_dec(&processing_SWI);   
}