Nios II Evaluation Board "not responding"

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originally posted by jdhar@Apr 11 2006, 01:07 PM

in my experience, and this isn't conclusive.. but when the programmer tries to reset the programmer and it fails the first time, it's likely a hardware issue, not software. as in the avalon bus is locked up.. if it's stuck in a loop or something, it can usually reset it the first time. what hardware components do you have in your system.

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The heart is the nios ii eval kit (http://www.altera.com/products/devkits/altera/kit-nios_eval_1c12.html). Connected to an external powersupply (5v with gnd tied to the FPGA gnd) and 11 ouput pins is a noritake itron cu20025ecpb-w1j vfd (http://www.noritake-itron.com/subpages/productse/vfmodlcdcomp.htm). There is now also a 4 button keypad (http://www.storm-interface.com/dyncat.cfm?catid=19030) and an a/d (http://focus.ti.com/docs/prod/folders/print/ads7824.html) connected but this problem was occuring when just the VFD was connected. The VFD, keypad, and A/D all work properly while the FPGA is functional.

Thanks,

Sean