C Programming with Audio IP Cores

Thanks, I figured it out though.

It was because I was incrementing the value NUM within a statement:

index = index+len[NUM++];

So it was taking the next value, when instead I wanted the present value and the incrementation to happen after. I also changed the max values and the unsigned integers to regular integers.

Seems to work now. This is what I have:

# include <Z:\try3\app_software\include\alt_up_audio.h>

# define Switch (volatile char *) 0x01001020

# define MAX_DATA 480000

int main()

{

int len[480000];

alt_u32 audiobuf[128];

alt_u32 audiostream[MAX_DATA];

int index= 0;

int ii,jj,NUM=0;

// Switch 0 should be off for playback

alt_up_audio_reset_audio_core();

while(1)

{

if ((*Switch) & 0x01)

{

len[NUM] = alt_up_audio_read_left_channel(audiobuf,128);

if((index + len[NUM]) < MAX_DATA) // chek for data overflow

{

for(ii = 0; ii < len[NUM]; ii++){

audiostream[ii+index] = audiobuf[ii];

}

index = index+len[NUM];

NUM=NUM+1;

}

}

else if((*Switch) & 0x02)

{

index = 0;

for (jj = 0; jj < NUM; jj++){

alt_up_audio_write_left_channel(audiostream+index,len[jj]);

alt_up_audio_write_right_channel(audiostream+index,len[jj]);

index=index+len[jj];

}

NUM = 0;

index = 0;

}

}

}