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vistaでquartus その10

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概要

vistaでquartusやってみた。
serialに、sendとbusyを導入してみた。

環境

windows vista 32bit
quartus ii v13.0
ep2c5t144ボード

写真

image

サンプルコード

module test2(input clk, input rst, output tx);
	localparam NEXT = 4'b0000;
	localparam DONE = 4'b1111;
	reg [5:0] n = 0;
	reg [7:0] char;
	reg [3:0] state = NEXT;
	reg send = 0;
	tx2 tx2(.clk(clk), .rst(rst), .send(send), .data(char), .tx(tx), .busy(busy));
	always @(posedge clk or negedge rst)
	begin
		if (rst == 0)
		begin
			state <= NEXT;
			n <= 0;
		end
		else if (send == 1)
		begin
			send <= 0;
		end
		else if (state == NEXT)
		begin
			state <= 1;
		end
		else if (busy == 0 && state != DONE)
		begin
			if (n == 26)
			begin
				state <= DONE;
			end
			else
			begin
				char <= 97 + n;
				send <= 1;
				n <= n + 1;
			end
		end
	end
endmodule



以上。

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