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Altera_Forum's avatar
Altera_Forum
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11 years ago

GPIO with both input and output pins

Hi, I have a DE1 develeopment board with lots of GPIO pins. Currently I use one header for inputs and the other for outputs. But I would like to put them all on the same header. When I tr...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Using the same array name for both inputs and outputs is not allowed.

You must declare two different bit vectors.

input [1:0] GPin;

output [1:0] GPout;

You then assign to the required pins as you'd have done with GPIO_1