IDT SRAM

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originally posted by m_llaa@Oct 29 2006, 06:18 AM

hi gomiboy

i am using sram with 1024kb, then i have 20 bits for addressing.

this is my simple program in nios. i can write and read.

for(i=1;i<30;i++)

{

iowr_32direct(base_sram,4*i,i+1);

for(beta=1;beta<5;beta++)

{

}

alpha = iord_32direct(base_sram,4*i);

printf("%x\t",alpha);

}

but

if in second "for" i increse delay for example for(beta=1;beta<10;beta++)

when i read from sram i can just read 0xffffffff

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was anybody able to resolve these issues? i am using IOWR/RD_32DIRECT, in fact i copied and pasted above code into my program, but was unable to write to or read from the SRAM on the DE2 board. furthermore, when i attempt to read from the SRAM, it is overwritten. any ideas?