module tmds_transmitter(input clk_in, 
                        input rst_in,
                        input[7:0] data_in,
                        output logic[9:0] data_out); 
      logic [8:0] s1_to_s2;      
      stage_1 my_stage_1(.clk_in(clk_in),.rst_in(rst_in),.s1_in(data_in), .s1_out(s1_to_s2));
      stage_2 my_stage_2(.clk_in(clk_in),.rst_in(rst_in),.s2_in(s1_to_s2),.s2_out(data_out));
endmodule


module stage_1 (input clk_in, input rst_in, input[7:0] s1_in, output logic [8:0] s1_out);
    //FROM LPSET 6
endmodule

module stage_2 (input clk_in, input rst_in, input[8:0]s2_in, output logic[9:0] s2_out);
    //YOUR ASSIGNMENT IN LPSET 7

endmodule


//provided for your usage:
module tmds_receiver (input[9:0] data_in, output logic[7:0] data_out);
        logic[8:0] stage_1;
        assign stage_1 = data_in[9]? ~data_in[8:0]:data_in[8:0];
        logic [7:0] option_1;
        logic [7:0] option_2;
        xor_decode my_xord   (.data_in(stage_1[7:0]),.data_out(option_1));
        xnor_decode my_xnord (.data_in(stage_1[7:0]),.data_out(option_2));
        assign data_out = stage_1[8]?option_1:option_2;
endmodule

module xor_decode (input [7:0] data_in, output logic[7:0] data_out);
    always_comb begin
        data_out = 8'b0; //initialize
        data_out[0] = data_in[0];
        for(integer i=1; i<8; i++)begin
            data_out[i] = data_out[i-1]^data_in[i];
        end
    end
endmodule

module xnor_decode (input [7:0] data_in, output logic[7:0] data_out);
    always_comb begin
        data_out = 8'b0; //initialize
        data_out[0] = data_in[0];
        for(integer i=1; i<8; i++)begin
            data_out[i] = ~(data_out[i-1]^data_in[i]);
        end
    end
endmodule