hi dear members,
i make a simple project on DE2_115
board.It record sound and play it.But sound is very
dirty.my c code is :
#include
<stdio.h>
int
i=0;
#include
"altera_up_avalon_audio.h"
int
main(
void)
{
alt_up_audio_dev * audio_dev;
/* used for audio record/playback */
unsigned
int l_buf;
unsigned
int r_buf;
// open the Audio port
audio_dev = alt_up_audio_open_dev (
"/dev/audio");
if
( audio_dev ==
null)
printf(
"Error: could not open audio device \n");
else
printf (
"Opened audio device \n");
/* read and echo audio data */
{
// read audio buffer
alt_up_audio_read_fifo (audio_dev, &(r_buf), 1, ALT_UP_AUDIO_RIGHT);
alt_up_audio_read_fifo (audio_dev, &(l_buf), 1, ALT_UP_AUDIO_LEFT);
// write audio buffer
alt_up_audio_write_fifo (audio_dev, &(r_buf), 1, ALT_UP_AUDIO_RIGHT);
alt_up_audio_write_fifo (audio_dev, &(l_buf), 1, ALT_UP_AUDIO_LEFT);
　
}
}
