Nios custom component I/0 in DE2

Hardware:

http://forum.niosforum.com/forum/index.php...ded&show=&st=&# (http://forum.niosforum.com/forum/index.php?showtopic=4979&pid=18913&mode=threaded&show=&st=&#)

Software:

use IOWR... and IORD... macros to avoid cache

you can check some Altera provided drivers (SPI and PIO are simple examples)

C:\altera\quartus60\sopc_builder\components

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originally posted by iztok.jeras@Nov 30 2006, 04:39 AM

hardware:

http://forum.niosforum.com/forum/index.php...ded&show=&st=&# (http://forum.niosforum.com/forum/index.php?showtopic=4979&pid=18913&mode=threaded&show=&st=&#)

software:

use iowr... and iord... macros to avoid cache

you can check some altera provided drivers (spi and pio are simple examples)

c:\altera\quartus60\sopc_builder\components

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Hi , iztok.jeras

thanks for your replies.

Regards

Faye

Hi guys.

I&#39;m a beginner using Nios II software and i need some advices for controlling an external camera connected to PROTO1 block in an Altera development board mounting EP2C35 FPGA.

On SOPC i added a couple of PIO(??) for Ctrl bits and Data bits of the Camera,ABLE to Call IRQs. System Generation is ok,compilation is ok, software is ok , BUT:

1)If i try to read the pio ports,these are always 0 (it seems no datas eventhough the oscilloscope show datas present);

1) program stops when reach alt_irq_register(a,b,c) instruction;

Have i to add an avalon tristate bridge for allowing pios&#39;s interface or it&#39;s enough to add pios on SOPC and use pin planner? I&#39;ve done the second but happen 1) and 2)

Thank you very much

Paolo