/*
	can bus physical model by leguoqing
*/

module can_transceiver
	(
		output logic rxd = 1,
		input  logic txd,
		inout  tri1  line
	);

	always@(*)
		if (line == 1'b0) rxd <= 1'b0;
		else rxd <= 1'b1;

	logic line_reg;
	always@(*)
		if (txd == 0) line_reg <= 0;
		else line_reg <= 1;

	assign line = line_reg ? 1'bz : 0;
endmodule