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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

Ok, I did so.

Command "flash->silicon_id= epcs_read_electronic_signature(flash->register_base);" reads the id 0xd9800717. It is no option in the following if statement.

So it runs to the else statement. The command "flash->silicon_id = epcs_read_device_id(flash->register_base);" returns 0xd9800717 again.

So the end is "ret_code = -ENODEV; /* No known device found! */"

That tells me what? The controller can not init because the device id is unknown. Right?

What's to do? Had I to modify the alt_epcs_flash_query() function? But Altera dehorts about this.

And the final question I ask my self, why could NIOS boot its software from the flash??

Greets