Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / arpan
// Tollbooth controller with VERILOG. My design contains 4
//inputs and one output. Output is : 1. stop_go signal ->
//This signal contains two leds i.e. green and red. Green
//denotes vehicle can go and Red denotes vehicle to stop.
//Input is 1.x -> This signal denotes presence of vehicle
//in toll booth. 2.heavy_light_vehicle -> This signal
//denotes weather its a heavy vehicle or light vehicle and
//pay accordingly. For heavy vehicle pay Rs 5 for light
//vehicle pay Rs 1. 3.Other input signal is clk and clear.
module controller (stop_go,X,heavy_light_vehicle,clk,clear);
input x, clk, clear, heavy_light_vehicle;
output stop_go;
reg stop_go;
reg [2:0]pay; //Amt that is being paid.
reg [0:1] state, next_state;
parameter s0 = 2'b00, s1 = 2'b01, s2 = 2'b10, s3 = 2'b11;
parameter red = 1'b0, green = 1'b1;
always @ (posedge clk)
begin
if (clear)
begin
stop_go <= red;
state <= s0;
pay <= 1'd0;
end
else
state <= next_state;
end
always @ (state or X or pay)
begin
case (state)
s0 : if (X)
next_state = s1;
else
next_state = s0;
pay = 3'd0;
s1 : if (heavy_light_vehicle)
begin
pay = 3'd1;
next_state = s2;
end
else
begin
pay = 3'd5;
next_state = s2;
end
s2 : if (pay == 3'd1 || pay == 3'd5)
begin
stop_go = green;
next_state = s3;
else
next_state = s1; // If correct amount is
//not paid then next_state again goes to s1
s3 : begin
stop_go = red;
next_state = s0;
end
default : next_state = s0;
endcase
end
endmodule
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
What are set up time & hold time constraints?
Explain the 8051 microcontroller architecture?
State the differences between a procedure and a macro.
Describe the instruction register of 8085?
What is the logical difference between move a to b and compute b = a?
Explain the differences between the nmi and intr
How subroutine can be called from the main program and how the program returns from the subroutine?
What type of instruction is cpi ‘c’ and define the action it performs?
Can you name the different types of processor?
The address capability of 8085 is 64 kb.explain?
What is the use of microprocessors?
What are the software instructions related to stack operations?
What is lookup table microcontroller?
Write the special functions carried by the general purpose registers of 8086?
Which interrupt is not level-sensitive in 8085?
