Исправление кода в ЛР07

[AndreaLabonair]

module bin2grey (
    input  logic [3:0] bin_i,
    output logic [3:0] grey_o,
);

    assign grey_o = (bin_i >> 1) ^ bin_i;

endmodule

module grey2bin (
    input  logic [3:0] grey_i,
    output logic [3:0] bin_o,
);

    assign bin_o[3] =  grey_i[3];
    assign bin_o[2] = ^grey_i[3:2];
    assign bin_o[1] = ^grey_i[3:1];
    assign bin_o[0] = ^grey_i[3:0];

endmodule

Запятые в шапках модулей не нужны -> syntax error
output logic [3:0] grey_o,
output logic [3:0] bin_o,

module ff2_synchroniser_flag_busy (
    input  logic clkA_i,
    output logic busyA_o,
    input  logic clkB_i,
    input  logic datA_i,
    output logic datB_o
);

    //Clock domain A

    logic       toggleA;
    logic [1:0] syncBusyA;

    always_ff @(posedge clkA_i) toggleA <= toggleA ^ datA_i;
    always_ff @(posedge clkA_i) syncBusyA <= {syncBusyA[0], syncB[2]};

    assign busyA_o = syncBusyA[1] ^ toggleA;

    //Clock domain B

    logic [2:0] syncB;

    always_ff @(posedge clkB_i) syncB <= {syncB[1:0], toggleA};

    assign datB_o = ^syncB[2:1];

endmodule

logic [2:0] syncB; Надо переместить в начало после шапки модуля иначе syncB is used before its declaration