Tri state issues killing my multi-bit adder

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Toasterbot
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Joined: Wed Mar 09, 2016 8:12 am

Tri state issues killing my multi-bit adder

Post by Toasterbot »

"Input pin x1 of&(9,21) connected to more than one output pin that are not tri state stable"
I get an error like this for each of the pins on the left-most gates in this full adder:
Image
It worked fine independently with button inputs and LED outputs. This error only occurs when I use my full adder as part of a larger adder, such as this one: Image
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admin
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Re: Tri state issues killing my multi-bit adder

Post by admin »

It probably telling the truth, you have connected two outputs to one input. If you share here your circuit it will be easier to help you.
Toasterbot
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Joined: Wed Mar 09, 2016 8:12 am

Re: Tri state issues killing my multi-bit adder

Post by Toasterbot »

Here's the zip of the project. It has a bunch of other simple components, but only Adder and Main were involved in the issue here.
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TestGroundsOne.zip
Adder and Main, respectively
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admin
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Re: Tri state issues killing my multi-bit adder

Post by admin »

Hi,
What you have is a connection between your inputs A and B on the leftmost adder.
In the future you can search for such incidences by selecting all connected wires Hold Shift key and click a wire and using menu Edit – select all different components.
Hope this help,
Eugene
Untitled.png
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