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Altera_Forum's avatar
Altera_Forum
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15 years ago

Pin Planner and JTAG pins...

Hi all, I'm new to this, why am I unable to assign the four Cyclone ii JTAG pins - I cant work out how to do it in pin-planner - any help appreciated, JB.

5 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Thanks - Im attempting to configure my DE1 board with openRISC (minsoc minimal configuration) , but the usbblaster interface is highly unreliable. I'm now trying to connect their top level JTAG signals straight to the JTAG onboard ('Generic jtag tap') - but this is obviously impossible from what you have said - thanks, JB.

  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Unfortunately, it's not clear what you are trying to achieve. I also don't understand where you see an "highly unreliable" operation and why?

  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Basically Im a bit out of my depth. I'm using cygwin on windows xp. The usb connection to the altera board only enumerates once in every ,say, 15 tries.

    Even then the connection 'self test' fails to communicate with the wishbone.

    I really need to move to a linux platform - its too complicated at the moment.

    Thanks for showing an interest - I'm going to try something simpler first.JB.
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    I am not sure about this. But give it a try. Try assigning these pins as 'Use as regular I/O' in 'Settings -> Device and Pin options -> Dual-Purpose Pins'. Maybe it works.