Hi VLorenzo,
> We haven't included any CFI flash device in the design, only an EPCS4 for
> storing the FPGA configuration (EP1C12) and a program that should run
> at start-up.
Maybe, you should add cfi flash device to your flash programmer design, though you have no cfi flash in you project. You can refer to
http://www.altera.com.cn/support/ip/processors/nios2/ips-nios2_devkit1.1-er.html#ideflash In Flash programmer failures on custom boards parts,
<div class='quotetop'>QUOTE </div>
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The flash programmer may fail if the custom target board does not contain a CFI flash component. Even if the board contains only an EPCS configuration device and no CFI flash, the target board system must contain a CFI flash component.
Workaround: Add a CFI flash component to your target board in SOPC Builder. You do not need to connect the flash signals to pins at the top level--you can leave them unconnected.[/b]
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I hope this can help you.
LiangYi