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From: ghelbig on 5 May 2008 14:06
On May 1, 8:59 pm, "bjzhan...(a)gmail.com" <bjzhan...(a)gmail.com> wrote:
> On 5ร”ร‚1รˆร•, รร‚รŽรง11รŠยฑ40ยทร–, ghel...(a)lycos.com wrote:
>
> > On May 1, 2:27 am, "bjzhan...(a)gmail.com" <bjzhan...(a)gmail.com> wrote:
>
> > > Hi,everybody,I am a fresher of NIOSII,and in the passed days ,I have
> > > been familar with the nios II system,also write some test program
> > > about the gpio,timer,uart and can work properly,today I add the flash
> > > controoler(CFI),but it doesn't work.And I use the signal tap to watch
> > > the wave and the address bus is active but the read,write and cs is
> > > always '1',I don't know why,can someone give me some advice and debug
> > > methods.
>
> > Here are two helpful links:
> > <http://www.google.com/search?q=debug+nios>
> > <http://www.google.com/search?q=simulate+nios>
>
> > Here's something to read while you're trying to figure out how to use
> > google's search feature:
> > <http://www.altera.com/literature/an/an351.pdf>
>
> > You really should learn about Google's search feature; it works pretty
> > well. And it's free for google-mail users (such as yourself), and the
> > rest of the internet.
>
> > Cheers,
> > G.
>
> Thanks,I have tried all what you say 2 days before and I have no idear
> so I refer to Google group for help.Now I know why,Firstly,the flash
> chip I use is not support CFI.but the nios II only support CFI
> compliant flash.Secondly,because the jtag uart also use jtag ,so if I
> use printf function and from the signal tap the signal I watch is
> always '1',I remove the printf function and then the signal is active
> in the signal tap.

NIOS supports many types of NOR flash, and adding a new type is
usually a software change in the HAL. If you're trying to use NAND
flash, there are application notes for those.

You can use a 'traditional' UART instead of the JTAG UART. Several
design examples for this on the Altera web site.

Keep googleing,
G.


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