Part Number: TMS320C5505
How to generate 1mv sine wave on TMS320C5505 USB Stick.
What changes should i do in the files below to generate 1mv sine wave signal.
/*****************************************************************************/
/* */
/* FILENAME */
/* sinewaves.c */
/* */
/* DESCRIPTION */
/* Sinewave generation for the TMS320C5505 USB Stick. */
/* */
/* Generates two sinewaves of adjustable frequency using sine() function */
/* in 55xdsph.lib */
/* */
/* The frequency of range of the sine wave is 10 Hz to 8000 Hz. */
/* */
/* REVISION */
/* Revision: 1.00 */
/* Author : Richard Sikora */
/*---------------------------------------------------------------------------*/
/* */
/* HISTORY */
/* */
/* Revision 1.00 */
/* 20th December 2009. Created by Richard Sikora from TMS320C5510 code. */
/* */
/*****************************************************************************/
/*
*
* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "tms320.h"
#include "dsplib.h"
/*****************************************************************************/
/* generate_sinewave_1() */
/*---------------------------------------------------------------------------*/
/* */
/* Generate a sinewave. Based on sampling rate of 48000 Hz. */
/* */
/* */
/* PARAMETER 1: The frequency of the sinewave between 10 Hz and 16000 Hz. */
/* PARAMETER 2: The maximum amplitude of the sinewave between 1 to 32767. */
/* */
/*****************************************************************************/
signed int generate_sinewave_1( signed short int frequency,
signed short int amplitude)
{
short int sinusoid;
signed long result;
static short int count = 0;
/* Multiply frequency by scaling factor of 32767 / 48000 */
result = ( (long)frequency * 22368 ) >> 14 ;
if ( result > 32767)
{
result = 32767; /* Maximum value for highest frequency */
}
else if ( 0 == result)
{
result = 1; /* Minimum value for lowest fequency */
}
else if ( result < -32767)
{
result = -32767;
}
count += (short int) result;
/* Obtain sine of input */
sine ( &count, &sinusoid, 1);
if ( amplitude > 32767 )
{
amplitude = 32767; /* Range limit amplitude */
}
/* Scale sine wave to have maximum value set by amplitude */
result = ( (long) sinusoid * amplitude ) >> 15;
return ( (signed int ) result );
}
/*****************************************************************************/
/* generate_sinewave_2() */
/*---------------------------------------------------------------------------*/
/* */
/* Generate a second sinewave. */
/* */
/* */
/* PARAMETER 1: The frequency of the sinewave between 10 Hz and 16000 Hz. */
/* PARAMETER 2: The maximum amplitude of the sinewave between 1 to 32767. */
/* */
/*****************************************************************************/
signed int generate_sinewave_2( signed short int frequency,
signed short int amplitude)
{
short int sinusoid;
signed long result;
static short int count = 0;
/* Multiply frequency by scaling factor of ratio 32767 / 48000 */
result = ( (long) frequency * 22368 ) >> 14 ;
if ( result > 32767)
{
result = 32767; /* Maximum value for highest frequency */
}
else if ( 0 == result)
{
result = 1; /* Minimum value for lowest fequency */
}
else if ( result < -32767)
{
result = -32767;
}
count += (signed int) result;
/* Obtain sine of input */
sine ( &count, &sinusoid, 1);
if ( amplitude > 32767 )
{
amplitude = 32767; /* Range limit amplitude */
}
/* Scale sine wave to have maximum value set by amplitude */
result = ( (long) sinusoid * amplitude ) >> 15;
return ( (signed int ) result );
}
/******************************************************************************/
/* End of sinewaves.c */
/******************************************************************************/
/*****************************************************************************/
/* */
/* PROJECT */
/* Sinewaves */
/* */
/* FILENAME */
/* main.c */
/* */
/* DESCRIPTION */
/* TMS320C5505 USB Stick Application 4. Generating sine waves. */
/* Generating sinewaves of variable frequency using DSPLIB. */
/* */
/* REVISION */
/* Revision: 1.00 */
/* Author : Richard Sikora */
/*---------------------------------------------------------------------------*/
/* */
/* HISTORY */
/* */
/* Revision 1.00 */
/* 1st March 2010. Original template code Spectrum Digital. */
/* */
/* Revision 1.01 */
/* 5th August 2010. Converted to use CSL. */
/* */
/*****************************************************************************/
/*
* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "stdio.h"
#include "usbstk5505.h"
#include "aic3204.h"
#include "PLL.h"
#include "sinewaves.h"
Int16 left_input;
Int16 right_input;
Int16 left_output;
Int16 right_output;
#define SAMPLES_PER_SECOND 48000
#define GAIN_IN_dB 0
unsigned long int i = 0;
/* ------------------------------------------------------------------------ *
* *
* main( ) *
* *
* ------------------------------------------------------------------------ */
void main( void )
{
/* Initialize BSL */
USBSTK5505_init( );
/* Initialize the Phase Locked Loop in EEPROM */
pll_frequency_setup(100);
/* Initialise hardware interface and I2C for code */
aic3204_hardware_init();
/* Initialise the AIC3204 codec */
aic3204_init();
/* Set sampling frequency in Hz and ADC gain in dB */
set_sampling_frequency_and_gain(SAMPLES_PER_SECOND, GAIN_IN_dB);
printf("\nRunning Sinewaves Project\n\n");
printf( "Sinewave 250Hz on left HP output, 1000Hz on right HP output\n\n" );
asm(" bclr XF");
for ( i = 0 ; i < SAMPLES_PER_SECOND * 600L ;i++ )
{
aic3204_codec_read(&left_input, &right_input); // Configured for one interrupt per two channels.
left_output = generate_sinewave_1(250, 10000); // Sinewave 1 is 250 Hz.
right_output = generate_sinewave_2(1000, 10000); // Sinewave 2 is 1000 Hz.
aic3204_codec_write(left_output, right_output);
}
/* Disable I2S and put codec into reset */
aic3204_disable();
printf( "\n***Program has Terminated***\n" );
SW_BREAKPOINT;
}
/* ------------------------------------------------------------------------ *
* *
* End of main.c *
* *
* ------------------------------------------------------------------------ */
