SDRAM and Audio problem

[Altera_Forum]

I want to write some data in SDRAM with a FOR cicle and connect the audio codec MIC (in) to audio codec spk(out), the audio code segment is ok, the problem is when I add the write sdram function because the program stops, I saw (before running program) that initially some data (probably code) is in sdram memory and I think maybe the write sdram function is changing the program code. Here the question is: Why program data in SDRAM if I configured in SOPC builder reset and exception vector in SRAM ??? What I can do to put the code program on SRAM and not SDRAM. 

 Here the code : # include "sdram_to_audio.h"  long i; alt_u16 cont=0;   void write_sdram()  {  alt_u16 *buffer = (alt_u16 *) 0x00800000; // base addr SDRAM   for (i=0; i<=127; i++){  buffer[i]=cont;  cont++;  }  }  int main() {  volatile int * audio_ptr = (int *) 0x10003040; // audio port  long audiobuf[128];   /* used for audio record/playback */  int fifospace;//, leftdata, rightdata;  int buffer_index = 0;    write_sdram();    while (1)  {  fifospace = *(audio_ptr+1); // read the audio port fifospace register    if ((fifospace & 0x000000FF) > 96)  {  audiobuf[buffer_index] = *(audio_ptr + 3); // read right channel only  buffer_index++;  }    fifospace = *(audio_ptr+1); // read the audio port fifospace register    if (((fifospace & 0x00ff0000)>>16) > 96) {  buffer_index--;  //Write to both channels  *(audio_ptr + 2) = audiobuf[buffer_index];  *(audio_ptr + 3) = audiobuf[buffer_index];   }   } }

[Altera_Forum]

Hi, 

 Have you selected data memory to SDRAM ? If you do that your data segment stored into SDRAM even while you select SRAM for your program code.   Regards, Hardik Sheth

[Altera_Forum]

Ok, thanks for the answer, I have the next configuration : 

 Read/write memory data is SDRAM  http://www.pixilis.com/photos/55560/   But the problem is not solve !!!!!  When I write for example 10 values the sound is ok, but when I write 1000 the sound is ok for seconds buts after it stops, why ???? If SDRAM doesn't containg program code ( or yes ??) .....

[Altera_Forum]

I found the solution !!!!!!!!!!! my system has a timer and my C program doesn't have a handler for timer interrupt, If I don't use the timer I have to desactivate it on system properties. 

  Thanks for your help !!!!!!!!!!!!!!!!!!!!!!!