NIOS II C language about SDRAM IOWR & IORD function and fopen & fclose

Hi Teddy,

Apart from the fopen issue, I'm concerned about the two R/W instructions:

IOWR(SDRAM_0_BASE, 0, input_data);
 output_data = IORD(SDRAM_0_BASE, input_data);

Problem 1:

You are writing to address 0 and reading from address 1 (content of input_data) which has not been initialized.

Maybe, you meant this:

output_data = IORD(SDRAM_0_BASE, 0);

Problem 2:

Are you sure this part of sdram is not already used for anything else?

Otherwise your IOWR would corrupt code or other data.

Cris