Hello everyone,

I am working on the following and am having some issues starting. It is to design a state table for a combination lock using the Moore FSM.

For example, the first two states are the following:

State 0: returns 1 when RIGHT is pressed, and 0 otherwise
State 1: returns 1 once a RIGHT press sets count to the first combination value, 0 for any
other count value on a RIGHT press, and 2 for a LEFT press.

I understand that for a Moore FSM, the output values is determine by the input values. I am having an issue starting the state table.

I know that there are two inputs - Left and Right. For State 0, if the input is Right, the output is 1. If it is Left, it is 0. However, does this mean that I transition right into State 1 afterwards? Or for State 0, if the input is left I am still on State 0?

Any guidance would be greatly appreciated.

 

Here is what I have so far for the first two states:

 

I would suggest you read over the section of the eBook regarding Moore FSMs as well as my proposed addendum to it (the introduction and first paragraph of the Mealy section describes some of the differences of each type, which may help you).

You need to clearly define what the requirements of your state machine are.