Serial Adder Moore Model Verilog
The serial adder is a digital circuit in which bits are added a pair at a time.
Let A and B be two unsigned numbers to be added to produce Sum = A + B. In this we are using three shift registers which are used to hold A, B and Sum. Now in each clock cycle, a pair of bits is added by the adder FSM and at the end of the cycle, the resulting sum is shifted into the Sum register.
Mealy type FSM for serial adder:
Design will be a serial adder. It will take 8-little bit inputs A and T and adds them in a serial fashion when the goinput is certainly fixed to 1. The outcome of the operation is kept in a 9-little bit sum sign up, The engine block diagram is attached. I was using Quartus II 13.0sg1 (64-bit) Internet Model. 4 Bit Serial Adder Verilog Code For Full DOWNLOAD a1e5b628f3 4 Bit Ripple Carry Adder in Verilog. A,B); endmodule Structural Model: Full Adder module fulladder. I need 16-bit ripple carry adder testbench verilog code.4-bit Full Adder using Two 2-bit Full Adders. Unorthodox but I'm curious to know as I am new to Verilog. This Verilog project is to present a full Verilog code for Sequence Detector using Moore FSM.A Verilog Testbench for the Moore FSM sequence detector is also provided for simulation. The Moore FSM keeps detecting a binary sequence from a digital input and the output of the FSM goes high only when a '1011' sequence is detected. The state diagram of the Moore FSM for the sequence detector is.
Let G and H denote the states where the carry-in-values are 0 and 1. Output value s depends on both the state and the present value of inputs a and b.
In state G and H:
| Input valuation | Output (s) | State |
|---|---|---|
| 00 | 0 | FSM will remain in same state G |
| 01,10 | 1 | FSM will remain in same state G |
| 11 | 0 | FSM moves to state H |
| 01,10 | 0 | FSM will remain in same state H |
| 11 | 1 | FSM will remain in same state H |
| 00 | 1 | FSM moves to state G |
A single Flip-Flop is needed to represent the two states. The next state and output equations are:
Y = ab + ay + by
s = a ⊕ b ⊕ y
The flip-flop can be cleared by the Reset signal at the start of the addition operation.
1 Bit Full Adder Verilog
Moore type FSM for serial adder:
In a Moore type FSM, output depends only on the present state. Since in both states, G and H, it is possible to produce two different outputs depending on the valuations of the inputs a and b, a Moore type FSM will need more than two states. Therefore we will four states namely: G0, G1, H0 and H1.
The next state and output equations are:
Y1 = a ⊕ b ⊕ y2
Y2 = ab + by2 + by2
s = y1
The only difference between circuits of Mealy and Moore type FSM for serial adder is that in Moore type FSM circuit, output signal s is passed through an extra flip-flop and thus delayed by one clock cycle with respect to the Mealy type FSM circuit.
References: Fundamentals of Digital Logic with VHDL Design
Mealy Machine Verilog Code | Moore Machine Verilog Code
This page covers Mealy Machine Verilog Code andMoore Machine Verilog Code.
Mealy Machine Verilog code
Bcd Adder Verilog
Following is the figure and verilog code of Mealy Machine.
Four Bit Adder Verilog
output out;
input in;
input clk, rst;
reg out;
reg[1:0] state;
parameters0=2'd0, s1=2'd1, s2=2'd2, s3=2'd3;
always @(posedge clk or negedge rst)
if(rst0) begin state=s0; out=0; end
else begin
case (state)
s0: if(in0) begin out=0; state=s1; end
else begin out=0; state=s0; end
s1: if(in0) beginout=0; state=s1; end
else begin out=0; state=s2; end
s2: if(in0) begin out=0; state=s3; end
else begin out=0; state=s0; end
s3: if(in0) begin out=0; state=s1; end
else begin out=1; state=s2; end
default: state=s0;
endcase
end
endmodule
Moore Machine Verilog code
Following is the figure and verilog code of Moore Machine.
output out;
input in;
input clk, rst;
reg out;
reg[1:0] state;
parameter s0=2'd0, s1=2'd1, s2=2'd2, s3=2'd3;
always @(posedge clk or negedge rst)
if(rst0) begin state=s0; out=0; end
else begin
case (state)
s0: begin out=0; if(in0) state=s1; else state=s0; end
s1: begin out=0; if(in0) state=s1; else state=s2; end
s2: begin out=0; if(in0) state=s3; else state=s0; end
s3: begin out=1; if(in0) state=s1; else state=s2; end
default: state=s0;
endcase
end
endmodule
Verilog source codes
Low Pass FIR Filter
Asynchronous FIFO design with verilog code
D FF without reset
D FF synchronous reset
1 bit 4 bit comparator
All Logic Gates