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Add tests for Xilinx UG901 examples

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SergeyDegtyar 2019-09-09 08:33:26 +03:00 • committed by Miodrag Milanovic
parent 0d037bf9d8
commit 2ae7dec530
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tests/xilinx_ug901/fsm_1.v Normal file
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// State Machine with single sequential block
//fsm_1.v
module fsm_1(clk,reset,flag,sm_out);
input clk,reset,flag;
output reg sm_out;
parameter s1 = 3'b000;
parameter s2 = 3'b001;
parameter s3 = 3'b010;
parameter s4 = 3'b011;
parameter s5 = 3'b111;
reg [2:0] state;
always@(posedge clk)
begin
if(reset)
begin
state <= s1;
sm_out <= 1'b1;
end
else
begin
case(state)
s1: if(flag)
begin
state <= s2;
sm_out <= 1'b1;
end
else
begin
state <= s3;
sm_out <= 1'b0;
end
s2: begin state <= s4; sm_out <= 1'b0; end
s3: begin state <= s4; sm_out <= 1'b0; end
s4: begin state <= s5; sm_out <= 1'b1; end
s5: begin state <= s1; sm_out <= 1'b1; end
endcase
end
end
endmodule