source: sandbox/MultiChannelUSB/trigger.v@ 130

module trigger
        (
                input   wire                    clock, frame, reset,
                input   wire    [11:0]  cfg_data,
                input   wire    [11:0]  trg_data,
                output  wire                    trg_flag
        );
        
        reg                             trg_flag_reg;
        reg             [11:0]  cfg_data_reg;
        reg             [11:0]  trg_data_reg;

        always @(posedge clock)
        begin
                if (reset)
        begin
                        trg_flag_reg <= 1'b0;
        end
        else 
                begin
                        if (frame)
                        begin
                                cfg_data_reg <= cfg_data;
                                trg_data_reg <= trg_data;
                        end
                        trg_flag_reg <= (trg_data_reg >= cfg_data_reg);
                end
        end
        
        assign trg_flag = trg_flag_reg;

endmodule