Can anyone suggest a tutorial for MicroBlaze?
I have googled it and found many tutorials, however, most seem to emphasize the software end of things, whereas I already have an evolved hardware system built from Project Navigator that needs to be folded into the design.
I followed one EDK 7.1 MicroBlaze Tutorial in Spartan
3 as a partial guide (I'm actually on an ML402) and came up with these questions:
1) In this tutorial there seems to be a XPS directory and a separate Proj Nav directory. I tried to open both tools in one directory and it failed. What is the best strategy for maintaining directories?
2) I attempted to add a MicroBlaze uP with only the UART enabled in the Studio Wizard. I then followed steps to incorporate the system_stub into the Proj Navigator. I then had two top level designs in Proj Navigator. Since the Microblaze was new and short, I decided to wrap the system_stub into the top of my hardware by declaring the system_stub as a component, and instantiating it once in the top layer. This elaborated into a single project. I also cut and paste the IOs into the top.ucf file. Some IOs, the sys_clk_in and sys_rst_in repeat. The TX and RX signals were added into the ucf file and also added to the top entity. I now have this synthesize error: "Port is connected to input buffer and following ports: Port IO of instance reset 1 in unit top with type LUT1." I think I can fudge around this but isn't there a better way to handle UCF edits?
3) In general, can I share inputs with top and system_stub?
4) If system_stub and top want an output is there a way to switch or mux from one to the other?
5) I think the ideal tutorial would have a simple hardware algorithm and the MicroBlaze would be added to change some parameters within that algorithm or exchange data. Perhaps, a dual ported BRAM with one side going to the MicroBlaze and another to the top layer.
6) What clock frequency does system_stub need?
Thanks for your advice,
Brad Smallridge Ai Vision