I'm using the "Quartus 10sp1 Web Edition" and the "NIOS II 10 Software Build Tools for Eclipse" to building a program that tests the Audio CODEC on DE2 Board.
I downloaded the "UP avalon audio core" from University IP core ( "
ftp://ftp.altera.com/up/pub/University_Program_IP_Cores/90/...") to include into my SPOC. And, this is my software:
#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)
alt_printf ("error: could not open audio device \n");
else
alt_printf ("opened audio device \n");
/* read and echo audio data */
while(1)
{
int fifospace = alt_up_audio_read_fifo_avail (audio_dev, alt_up_audio_right);
if ( fifospace > 0 ) // check if data is available
{
// 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);
}
}
}
It's no working, everything is quite.Then, i tesed value of
fifospace, always is
zero !!!
.
It is NO FIFO SPACE ???.
Anybody can help me plz !. Thanks !.
