- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
I'm trying to implement the graphics display that comes with the stratix iii (DSP) dev. kit. Because there's no special core for this 128x64 b/w display I want to use a pio with bidirectional pins (to be able to read the busy flag), but the SOPC builder doesn't offer this option. When I switch to a Cyclone III device the option is available. Anybody got an idea if this is a bug or a feature:confused: btw. I'm using Quartus II 8.1 (and don't want to change version during project)Link Copied
3 Replies
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Im not familiar to SOPC builder stuff, but I guess the problem may come from a pin definition as out rather than inout in the design?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
thanks for the response especially because it's sunday!
I'm afraid I don't know exactly what you mean. By the time I configure the PIO core in the SPOC builder the configuration of the FPGA pins isn't made yet. This usually happens where the SOPC design is instantiated. The strange thing is when I switch the FPGA family from Stratix III to Cyclone III in the SOPC builder the "bidirectional" option for the PIO ist there otherwise not. Is there a difference between the Stratix III pins and the Cyclone III pins I'm too blind to see?- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
I was referring to the port setting in the design top, that isn't set necessarily by the SOPC builder. But your report sounds like it's a different issue. Stratix III has I/O cells similar to other FPGA families, thus I don't see a basic difference. But I fear, I can't help in this regard.
Reply
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page