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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

Otherwise, if you need to mantain the overall GPIO_1 name, you need to declare a bidirectional array:

inout [3:0] GPIO_1

and then write something like this:

assign GPIO_1[3:0] = { GPout[1:0], 2'bzz };

assign GPin[1:0] = GPIO_1[1:0];