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About Cactus

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  1. I just got the PS/2 wings in the mail, thank you! I've meanwhile manned up and made a PS/2-to-breadboard adapter by soldering a PS/2 connector to a stripboard; that went well apart from mixing up GND and Vcc on the first try, frying the keyboard... Check the result:
  2. Thanks, by moving the Arcade MegaWing (instead of flipping), and using P85/P83 of the Papilio One as the PS/2 DATA/CLK lines, I got it working. However, my schedule has also changed, and so I might have enough time to wait for the PS/2 wing, so I'll be taking you up on your offer. I'll send my shipping details in a private email. Thanks a lot!
  3. Output voltage on pins

    Thanks; I've tried and managed to drive the 5V device (a 1602 LCD) with the 3.3V signals (and 5V power of course).
  4. Thanks a lot Jack, I might take you up on that offer -- but I'm in Singapore and I'd like to build this in time to show it off at a meetup in two weeks' time, so waiting for extra parts is not an option. So will a flipped Arcade MegaWing work?
  5. Output voltage on pins

    Thanks, that's very helpful. And what if I need to do output to a 5V device? I guess I could use one transistor per line, but is there an easier way?
  6. For my next project, I need to use a PS/2 keyboard as an input device, and a 1602 LCD module for output. This means I will need a PS/2 port and some free pins (six to be exact) at the same time. What options do I have if I don't have a standalone PS/2 wing? My current plan is to take an Arcade MegaWing, and put it on a Papilio One flipped, i.e. by leaving the connector marked U$1WING2 free, and then use some male-to-male jumper cables on that connector to connect to the LCD on a breadboard. By re-mapping the pins in the UCF file, I should be able to get one of the PS/2 connectors working that way, right? Is there a better way to achieve this?
  7. Output voltage on pins

    What is the output voltage level for 'high' signals on the Papilio Pro? I'd like to communicate with 3.3V components from it, is that possible by just connecting directly to the pins? I see there are separate 3.3V and 5V power pins. If I have a component that requires 3.3V signals and another that requires 5V, is there a way to communicate with both with a single Papilio Pro?
  8. So, on a Papilio One 500k, I would use bscan_spi_xc3s500e.bit as the -b file? And the Java GUI just auto-detects it and picks the right one?
  9. Hi, I can use papilio-prog -f foo.bit to upload my bitstream to RAM, or I can use the Java GUI to flash it. Is there a way to use papilio-prog to flash to SPI from the command line? The obvious flag would seem to be -b, but that just results in: Please specify main bit file (-f <bitfile>)
  10. PS/2 ports on Arcade MegaWing

    Thank you everyone for your help -- the solution was indeed to get a proper PS/2 keyboard. Now all the test configurations work as expected.
  11. PS/2 ports on Arcade MegaWing

    I'll try getting a true PS/2 keyboard and will report back.
  12. PS/2 ports on Arcade MegaWing

    Alex: Thanks! Can you maybe send me a bitfile for testing? I am now at the point where I'd like to make sure the hardware (incl. the usb -> ps2 dongle!) is working before looking at anything else.
  13. PS/2 ports on Arcade MegaWing

    I have now also tried the code from, by connecting joy_up directly to one of the LEDs. If I understand correctly, that should result in the LED lighting up as long as I am pushing the left cursor key on the keyboard, right? Still doesn't work.
  14. PS/2 ports on Arcade MegaWing

    I've added this question to Electronics.SE: Does someone have a ready-made .bit file I could upload to a Papilio One + Arcade megawing and smoke-test the PS/2 connectors? Something that flashes the LEDs when keys are pressed on an attached keyboard, etc.?
  15. PS/2 ports on Arcade MegaWing

    I have now also tried again with a slight change that should light up LED<0> on the first successful keyscan (see attached), and that doesn't work either. Does anyone have a full .bit file I can use to just smoke-test the Arcade PS/2 ports? I'm starting to think the hw or the USB dongle might be at fault here.