nothing out to uart,help me

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originally posted by scut_ak@Apr 27 2006, 11:33 PM

hi,hippo

i use nios ide to build my linux image, i disable the mul and jatg-uart

then the output is the same as i build the image in linux environment

the output is as follow:

linux version 2.6.11-uc0 (administrator@microsof-0da828) (gcc version 3.4.1 (altera nios ii 5.1 b73))# 1 thu apr 27 23:04:07 2006

uclinux/nios ii

altera nios ii support © 2004 microtronix datacom ltd.

built 1 zonelists

kernel command line: root=/dev/mtdblock0 ro

pid hash table entries: 64 (order: 6, 1024 bytes)

why?

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I think this is the problem. (I made the same mistake before, too)

You are using nios2 v4.2, and the execption address, ie, interrupt entry, is in onchip memory.

Nios2 uClinux assume interrupt entry at program memory, ie, sdram.

So when interrupt came, and it stuck.

You should update to nios2 v5.1 and quartus2 v5.1 sp2.

Setup the execption address, to sdram.