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Altera_Forum's avatar
Altera_Forum
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16 years ago

vhdl help

Hi, In vhdl can we make an pin declared as "inout" to act as input or as output depending on certain condition. entity rout is port( a : inout bit; b : inout bit; );...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

You need a control input, try this(you also need std_logic type instead of bit)

b <= a when ctrl = '0' else ''Z';

a <= 'Z' when ctrl = '0' else b;