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Altera_Forum's avatar
Altera_Forum
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14 years ago

DE1 Board broken??!

Hello,

I added some extra hardware to the Terasic DE1 board by connecting it over the GPIO1 square header. When pressing the power button the board doesn't start up. When I remove my extra hardware it still powers up. However, I noticed that there are some pins not working anymore after trying my extra stuff :( I just drove all pins of GPIO1 high and measured that some pins aren't 3.3V!

What's propably wrong with it and what can I do? PLEASE HELP:cry:

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  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    You have to carefully check your pcb before connecting it to FPGA, test it with a low-cost MCU before..

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    yeah, that's what I did. But it happened....

    What about some fuses?
  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    Stripboard isn't really suitable for wiring stuff to the GPIO headers on a DE1, because the header pins are only one row of holes apart, so it's tricky to break the tracks between opposite pins on the header.

    If you *didn't* break the tracks between them I'm not surprised the board got fried! If you look at the DE1's schematic, you'll see that pin 11 on the GPIO headers carries +5v, but the pin opposite, pin 12, is grounded. Likewise for pins 29 & 30, +3.3v and gnd respectively.

    With your board connected, +5v, gnd and +3.3v were all shorted together, which explains why it wouldn't start up, and why something got fried.