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Altera_Forum's avatar
Altera_Forum
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14 years ago

How to use an EPCS Flash

Hallo together, I'm actually trying to save data from NIOS II into an EPCS64 device. My system contains an EPCS controller. But now the confusion is complete, there are so many files for usin...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Hallo,

I'm already working on this problem. I could not get any data out of this flash. I recently tried to access the flash over a simple spi after booting.

So I multiplexed the signals. I boot over EPCS controller and the the NIOS switches the the signal to a spi.

Then I try to send an RDID command over the spi interface.

With the oscilloscope I see, that the clock is right. Also the CSn and the Data signal seems to be right. But the Flash never answers...

I tried the same withe a READ command -> no answer!

Has anybody an idea about this behavior?

Greets

Sim