Nios-II 1.1 EPCS Bootloader

Altera_Forum · ‎02-03-2005

Hi All,

After I boot from an epcs device the chip select remains asserted

(control register = 0x0000_0400).

Has anyone else observed this?

--Scott

BTW: This causes the u-boot epcs command to fail the first time

it is invoked.

Altera_Forum · ‎02-03-2005

Yes, see this topic - look for the post from Kero Kero for a workaround:

Altera_Forum · ‎02-03-2005

Thanks Jesse ...

... in general, it's probably good practice from a software point-of-view to

assume that the chip select was left in an inappropriate initial state ...

... so it's time for me to use good practice ;-)

Thanks again,

--Scott

Altera_Forum · ‎02-04-2005

Just an FYI for anyone following this thread:

A jump to the reset address (soft reset) when booting from

the epcs_controller will cause the epcs boot loader to hang.

Prior to doing something like this, you must make sure the

epcs chip select is negated.

Regards,

--Scott