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Altera_Forum
Honored Contributor
Honored ContributorVerilog question for first timer - number notation
I'm working on my first verilog project, on an Altera DE2 board
So i'm working through some demo code/ best practices to try to do a little learning and I havnt seen this before:
assign HEX7 = 7'h7f;
assign GPIO_1 = 36'hzzzzzzzzz;
A <= 4'b0000;
A <= A + 1'b1;
4 Replies
Altera_ForumAhh thank you. I didint realize I could use the Z and X in that notation. everything is cleared up. thank you very much!
- Altera_Forum
"z" means high impedance.
"x" is also used, for "unknown/don't care". - Altera_Forum
http://en.wikipedia.org/wiki/verilog also gives a good novice introduction into the verilog basics.
But the best is to read a good book on verilog. - Altera_Forum
Ok... I think I got it. I think the number before the ' is the number of bits, and then b for binary, h for hex and then the value... the one that threw me off was the
i thought hex only went up to F, so this one is still confusing me.assign GPIO_1 = 36'hzzzzzzzzz;
