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alex last won the day on July 13 2015

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About alex

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  1. alex


    Hey guys, It's been a while since I was last here so I thought I'd pop in and say hi to all the old timers I used to know. I wonder how many of them are still here poking around, trying to beat them FPGA gates into submission A
  2. This is available on HaD, looks pretty useful if someone wants to reuse/recycle modern LCD displays like the ones in iPhones. Source code and everything is available.
  3. alex

    LogicStart Shield for the Papilio DUO

    That is what I think as well. It's hard to make one mega shield that will please everyone, which is why I'm surprised that there hasn't been a bigger emphasis on wings, which was a big selling point in the old days of Papilio. With individual wings one could assemble exactly what they needed. I still think it is useful to have specialized mega wings such as the arcade one for example but for learning purposes a collection of individual wings could be more suitable. For example the logic megawing can be broken down to an 8 bit wing with 4 sliders + 4 LEDan 8 bit wing with 4 sliders + 4 LED an 8 bit audio wingan 8 bit wing with directional switches (or joystick)a 16 bit VGA winga 16 bit wing with the 7 segment displayThen everyone's happy. You want alphanumeric displays, just replace the 7 seg wing with and alphanumeric one (once one is designed of course). Or maybe you want 8x8 dot matrix. No need for VGA, leave that wing off and you have more free pins available. Maximum flexibility. Another useful widget might be a 8 bit wing to PMOD adaptor, either straight or right angle to open up the world of Digilent PMODs to the Papilio.
  4. alex

    Question about Papilio Pro

    A Papilio digital line set to be an input should not place that much load on your test circuit as to cause a huge voltage drop. Most likely the FPGA has the internal pulldown resistors configured and they are stronger than your test circuit pullups. You should re-synthesize the bitstream with all pullup/pulldown resistors from the FPGA removed in the constraints file.
  5. alex

    LogicStart Shield for the Papilio DUO

    You can try to do video processing with HDMI in /out wings. VGA input is problematic due to it being an analog signal.
  6. alex

    Propeller 1 open source

    Niceeee. I like it when this sort of stuff happens.
  7. Yeah the subscription is only $50/year for the electronic edition (pdf download). I've been reading CC since I was a young whipper snapper, I have a full pdf collection back to issue 1.
  8. Hey Jack, you might have to buy Colin a beer or two next time you see him. In the latest issue #289 of Circuit Cellar magazine he has another article that starts with a very large picture of a Papilio Pro and LogicStart Megawing. It almost looks like a full page ad for Papilio.
  9. alex

    Papilio DUO Kickstarter - Feedback request!

    But trenz are not cheap, expect big markup on price
  10. alex

    Papilio DUO Kickstarter - Feedback request!

    Looks pretty flashy Jack, I wish you all the best with this new KS endeavour and hope you achieve the funding. Video sound is a bit echoey, mic must not have been close enough but nothing major.
  11. alex

    OV7670 and PPro

    I thought you can right click on a signal in isim and do a "show drivers" to see what's driving it. Then you can decide if there's something there that shouldn't be.
  12. alex

    socz80: A Z80 retro microcomputer for the Papilio Pro

    Thanks for sharing Will
  13. alex

    Microblaze on Papilio Pro

    Correct. The LX9 has built in MCB cores but they are only connected to external pins in BGA packages.