What is FSM design?

What is FSM design?

The definition of a finite state machine is, the term finite state machine (FSM) is also known as finite state automation. FSM is a calculation model that can be executed with the help of hardware otherwise software. This is used for creating sequential logic as well as a few computer programs.

Is FSM a design pattern?

This chapter presents an FSM pattern language that addresses several recurring design problems in implementing a state machine in an object-oriented design. The pattern language includes a basic design pattern for FSMs whose design evolves from the general understanding of state machines functionality.

What are the elements of FSM?

Basic FSM elements

  • Input Ports. The basic events are represented by data parsed into an input port of the FSM model interface.
  • Special Events.
  • Internal Events.
  • Name.
  • Hierarchical States.
  • Current State.
  • State Actions.
  • Slave Process.

How do you implement FSM?

  1. Identify all possible states in your application.
  2. Identify all the events in your application.
  3. Identify all the conditions in your application, which may lead state transition.
  4. Occurrence of an event may cause transitions of state.
  5. Build a finite state machine by deciding a workflow of states & transitions.

How do I write FSM code in Verilog?

Basically a FSM consists of combinational, sequential and output logic. Combinational logic is used to decide the next state of the FSM, sequential logic is used to store the current state of the FSM. The output logic is a mixture of both combo and seq logic as shown in the figure below.

Why are finite machine called so?

Definition. A Finite State Machine is a model of computation based on a hypothetical machine made of one or more states. Only one single state of this machine can be active at the same time. It means the machine has to transition from one state to another in to perform different actions.

Which modeling is used in FSM coding?

INTRODUCTION The Finite State Machine (FSM) model is a model of choice to describe a sequential system who do not require parallelism in its evolution (even if it allows parallelism for its actions or parallelism of execution of multiple models).

What are FSM used for?

Introduction. A Finite State Machine, or FSM, is a computation model that can be used to simulate sequential logic, or, in other words, to represent and control execution flow. Finite State Machines can be used to model problems in many fields, including mathematics, artificial intelligence, games or linguistics.

How to design an FSM design?

The first step of an FSM design is to draw the state diagram. The sequence detectors can be of two types: with overlapping and without overlapping. For example, consider the input sequence as “11010101011”. Then in ‘without overlapping’ style, the output y will be “00001000100” and the output y in ‘with overlapping’ style will be “00001010100”.

What are the applications of FSM in electronic machines?

From the daily used electronic machines to the complex digital systems, FSMs are used everywhere. For example, in a station the vending machine which dispatches ticket uses a simple FSM. In the complex digital systems the controlling part is most of the times implemented using FSMs.

What are the different types of FSMs?

FSMs are generally of two types. MEALY Machine: MEALY circuits are named after G. H, Mealy, one of the leading personalities in designing digital systems. The basic property of Mealy circuits is that the output is a function of the present input conditions and the present state (PS) of the circuit.

How to draw the correct state diagram for FSMs?

The drawing of the correct state diagram is very crucial in designing FSMs. Though there is no fixed rule of drawing state diagrams some comments can be made. In present state S 0, if the input is ‘1’ then the next state is S 1 and if input ‘0’ then the next state is the current state. It is similar for present state S 1.