windowsでiverilog その39

概要

windowsでiverilogやってみた。
俺cpuにserialつけて見た。

写真

動かしたコード

serialにaからzを吐く。

		mem[0] = 16'h1000;//push 0
		mem[1] = 16'h300f;//set 15
		mem[2] = 16'h200f;//get 15
		mem[3] = 16'h101a;//push 26
		mem[4] = 16'hf00f;//>
		mem[5] = 16'h5005;//if 5 
		mem[6] = 16'h200f;//get 15
		mem[7] = 16'h1061;//push 97
		mem[8] = 16'hf000;//+
		mem[9] = 16'he000;//out
		mem[10] = 16'h200f;//get 15
		mem[11] = 16'h1001;//push 1
		mem[12] = 16'hf000;//+
		mem[13] = 16'h300f;//set 15
		mem[14] = 16'h4002;//jp  2
		mem[15] = 16'h0000;//i

サンプルコード

module test2(input clk, input rst, output tx, output reg led5 = 0, output reg led4 = 0, output reg led2 = 0);
	wire [2:0] cs;
	wire [15:0] irout,
		dbus,
		qtop,
		qnext,
		ramout,
		aluout,
		pcout;
	reg [15:0] in;
	reg [11:0] abus;
	reg halt = 0,
		cont = 0,
		pcinc,
		push,
		pop,
		abus2pc,
		dbus2ir,
		dbus2qtop,
		dbus2ram,
		dbus2obuf,
		pc2abus,
		ir2abus,
		ir2dbus,
		qtop2dbus,
		alu2dbus,
		ram2dbus,
		in2dbus;
	counter pc0(.clk(clk), .rst(rst), .load(abus2pc), .inc(pcinc), .d(abus), .q(pcout));
	tx2 tx2(.clk(clk), .rst(rst), .start(start), .data(out), .tx(tx), .busy(busy), .get(get));
	oneshot one0(.clk(clk), .rst(rst), .in(get), .out(get2));
	fifo fifo0(.clk(clk), .rst(rst), .put(dbus2obuf), .get(get2), .data(dbus), .out(out), .empty(empty), .start(start));
	buffer ir0(.clk(clk), .rst(rst), .load(dbus2ir), .d(dbus), .q(irout));
	state state0(.clk(clk), .rst(rst), .cont(cont), .halt(halt), .cs(cs));
	stack stack0(.clk(clk), .rst(rst), .load(dbus2qtop), .push(push), .pop(pop), .d(dbus), .qtop(qtop), .qnext(qnext));
	alu alu0(.a(qtop), .b(qnext), .f(irout[4:0]), .s(aluout));
	ram ram0(.clk(clk), .load(dbus2ram), .addr(abus[11:0]), .d(dbus), .q(ramout));
	assign dbus = ir2dbus ? {{4{irout[11]}}, irout[11:0]} : 16'hzzzz;
	assign dbus = qtop2dbus ? qtop : 16'hzzzz;
	assign dbus = alu2dbus ? aluout : 16'hzzzz;
	assign dbus = ram2dbus ? ramout : 16'hzzzz;
	assign dbus = in2dbus ? in : 16'hzzzz;
	always @(pc2abus or ir2abus)
	begin
		if (pc2abus)
		begin
			abus <= pcout;
		end
		else if (ir2abus)
		begin
			abus <= irout[11:0];
		end
		else
		begin
			abus <= 12'hxxx;
		end
	end
	always @(cs)
	begin
		halt = 0;
		pcinc = 0;
		push = 0;
		pop = 0;
		cont = 0;
		abus2pc = 0;
		dbus2ir = 0;
		dbus2qtop = 0;
		dbus2ram = 0;
		dbus2obuf = 0;
		pc2abus = 0;
		ir2abus = 0;
		ir2dbus = 0;
		qtop2dbus = 0;
		alu2dbus = 0;
		ram2dbus = 0;
		in2dbus = 0;
		led5 = 1;
		led4 = 1;
		led2 = 1;
		if (cs == `FETCHA)
		begin
			pcinc = 1;
			pc2abus = 1;
			led5 = 0;
		end
		else if (cs == `FETCHB)
		begin
			ram2dbus = 1;
			dbus2ir = 1;
			led4 = 0;
		end
		else if (cs == `EXECA)
		begin
			led2 = 0;
			case (irout[15:12])
			`PUSH:
			begin
				ir2dbus = 1;
				dbus2qtop = 1;
				push = 1;
			end
			`GET:
			begin
				ir2abus = 1;
				cont = 1;
			end
			`SET:
			begin
				ir2abus = 1;
				qtop2dbus = 1;
				dbus2ram = 1;
				pop = 1;
			end
			`JMP:
			begin
				ir2abus = 1;
				abus2pc = 1;
			end
			`JZ:
			begin
				if (qtop == 0)
				begin
					ir2abus = 1;
					abus2pc = 1;
				end
				pop = 1;
			end
			`JNZ:
			begin
				if (qtop != 0)
				begin
					ir2abus = 1;
					abus2pc = 1;
				end
				pop = 1;
			end
			`OUT:
			begin
				qtop2dbus = 1;
				dbus2obuf = 1;
				pop = 1;
			end
			`OP:
			begin
				alu2dbus = 1;
				dbus2qtop = 1;
				if (irout[4] == 0)
				begin
					pop = 1;
				end
			end
			default:
			begin
				//halt = 1;
			end
			endcase
		end
		else if (cs == `EXECB)
		begin
			if (irout[15:12] == `GET)
			begin
				ram2dbus = 1;
				dbus2qtop = 1;
				push = 1;
			end
		end
	end
endmodule

以上。