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Altera_Forum's avatar
Altera_Forum
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16 years ago

CIII programming problem.. newbie question

Hi,

I try to program Cyclone III for the very first time. I've already assembled the board (it was designed and soldered on my own).

Quartus II recognizes the device correctly. I decided to start with something extremely easy, so I created the following:

http://img231.imageshack.us/img231/87/rys.gif (http://img231.imageshack.us/my.php?image=rys.gif)

The problem is that it doesn't work :(

When I change the input voltage from 0V to 3.3V (I use a microcontroller to do so), I expect the output pin (MyOut) would follow this change.. but it is 3.3V all the time.

Pin 144 (MyOut) is not connected to any other devices, it is unused.

What can I check? Maybe some settings of the CIII device or some other options?

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    --- Quote Start ---

    Hi,

    I try to program Cyclone III for the very first time. I've already assembled the board (it was designed and soldered on my own).

    Quartus II recognizes the device correctly. I decided to start with something extremely easy, so I created the following:

    http://img231.imageshack.us/img231/87/rys.gif (http://img231.imageshack.us/my.php?image=rys.gif)

    The problem is that it doesn't work :(

    When I change the input voltage from 0V to 3.3V (I use a microcontroller to do so), I expect the output pin (MyOut) would follow this change.. but it is 3.3V all the time.

    Pin 144 (MyOut) is not connected to any other devices, it is unused.

    What can I check? Maybe some settings of the CIII device or some other options?

    --- Quote End ---

    Hi,

    is it really driving 3.3 Volt or is it tristated ? In case of tristate I would assume the device is not succesfully programmed or the Pin Assignment is not correct .

    Kind regards

    GPK