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12748 Discussions

External peripherals interface

Altera_Forum
Honored Contributor II
‎12-05-2006 08:46 PM
1,014 Views

Hi guys. 

I'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's interface or it's enough to add pios on SOPC and use pin planner? Am i wrong?What have i to add? 

I've done the second but happen 1) and 2) 

 

Thank you very much 

 

Paolo http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/unsure.gif
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