module rise_pulse(
input wire clk,
input wire rst, // synchronous active-high reset
input wire sig_in,
output reg pulse
);
reg prev; // previous sampled value of sig_in
always @(posedge clk) begin
if(rst)begin
pulse <= 0;
prev <= 0;
end
else begin
pulse <= ((~prev&sig_in));
prev <= sig_in;
end
end
endmodule