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Altera_Forum's avatar
Altera_Forum
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14 years ago

Failed Executing

Hi all,

I Quartus Web Edition 10.1, I loaded a project nios FPGA. (Terasic DE1)

only with on-chip memory, the run goes well,

When I put the sdram, I get:

Failed Executing: [nios2-download '- = USB-Blaster cable on localhost [USB-0]', - device = 1, - instance = 0, - g, -

An exception stack trace is not available.

Using cable "USB-Blaster [USB-0]", device 1, instance 0x00

Already processor is paused

Reading System ID at address 0x01009878: verified

Initializing CPU cache (if present)

OK

Downloading 00800000 (0%)

Downloading 008051D0 (98%)

Downloading 01004000 (99%)

Downloaded 21KB in 0.3s (70.0KB / s)

Verifying 00800000 (0%)

Between verify failed address 0x800000 and 0x8050DB

Leaving target processor paused

jtag my configuration is:

USB-Blaster [USB-0]

020B30DD EP2C15/20

Node 19104600

Node 0C006E00

Node 00086E00

can anyone help me?

Thank you all.

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    SDRAM has special clock skew requirements, therefore you can't use the same clock with NIOS. If I remember correctly, the SDRAM clock needs to lead the NIOS clock by 3 ns.

    Use a PLL to generate a clock that leads the NIOS clock by 3 ns and use it for the SDRAM.