Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Writing to EPCS device from Serial Flash Loader & SPI IP core

I have a working hardware design whith Cyclone IVe. Inside the FPGA we have an SPI peripheral which reads and writes from/to any standard SPI bus. This IP core has been validated in dozens of o...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

--- Quote Start ---

You can use your SPI core directly with the EPCS devices. You do not need to instantiate any Altera IP cores, just set the EPCS pins as "Use as regular I/O" using the Quartus GUI or using Tcl constraints, and then connect your SPI IP to those pins.

Cheers,

Dave

--- Quote End ---

Thanks Dave,

But we already tried this approach and it did not work. We got errors (I can't remember right ATM but I think errors were during MAP or PAR).

I thought this altserial_flash_loader was specifically to grant access to the programming pins from within the running design, and use them as SPI.

Is there a reference design anywhere that shows that "use as regular I/O" working?

Thanks again for the reply.