module rise_pulse (
input wire clk,
input wire rst, // synchronous active-high reset
input wire sig_in,
output reg pulse
);
reg prev;
always @(posedge clk) begin
if (rst) begin
prev <= 1'b0;
pulse <= 1'b0;
end
else begin
pulse <= sig_in & ~prev; // rising edge detect
prev <= sig_in;
end
end
endmodule