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Altera_Forum's avatar
Altera_Forum
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16 years ago

DMA Transfer Issue

Hi, I have build a system which has NIOS II, DDR SDRAM controller, On-Chip RAM, UART,DMA Controller. My program memory is DDR SDRAM. I have connected DMA controller between DDR SDRAM and On-Chi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

i see no mistake in sopc.

your ddr memory must be at 02000000 and i do not see any memory at 00100000

you programm uses values from system.h

DDR_SDRAM_BASE is this value 00000000 or is it 02000000 ?

if you modify your application a bit

case 'B': // DDR write operation

DDR_write_ADDRESS = to_hex(&packet[1]);

data = to_hex(&packet[9]);

for(i=1;i<=32;i++)

{

IOWR(DDR_write_ADDRESS,0,data);

iprintf("Written %08x to address %08x \n", data, DDR_write_ADDRESS);

DDR_write_ADDRESS += 1;

data += 1;

}

break;

now could enter any real adress without system.h

now try again 02100000