带发送FIFO缓冲的RX232串口发送以及把众多文件变成“黑匣子”用于其它工程的调用

如果需要发送端不断地接收新的数据，而发送端的数据传输率低就需要一个缓冲器FIFO来缓冲数据。当你为别人做项目只是想实现功能而不想让自己的代码让别人看到，想保护自己的算法时，你可以用以下的方法。我使用的是quartus II 13。

参照：

http://www.cnblogs.com/adamite/p/qxp_vqm.html

http://blog.sina.com.cn/s/blog_6276d01c01010izc.html

以下为底层工程文件代码：

 module RX232(input clkin,input CLK50,input write,input [:] datain,output TX );//write =2cycle
 reg read;
 wire [:]dataout;
 wire empty;
 wire full;
 reg EN=;
 wire endtck;
 reg [:]count=;
 wire  clk9600;
 alt_9600 M0(CLK50,clk9600);
 //assign clk9600=CLK50;
 FIFO  M1(.clkin(clkin),.write(write),.datain(datain),.clkout(CLK50),.read(read),.dataout(dataout),.empty(empty),.full(full));
 RX232_IN M2(.CLK9600(clk9600),.datain(dataout),.TX(TX),.EN(EN),.endtck(endtck));

 always@(posedge CLK50)
 begin
     if((!empty)&(endtck) )begin read<=; EN=;end
     else read<=;
 //    if(read) begin count<=count+1; if(count==3) begin count<=0 ;EN=1;end end
     if(read) begin read<=;end
     if((!read)&(!endtck)) EN<=;

 end 

 endmodule 

 module RX232_IN(input CLK9600,input [:] datain,output reg TX,input EN,output reg endtck);

 reg [:] temp1;
 reg [:] temp;
 reg [:] count=;
 reg[:] num=;

 always@(posedge CLK9600)
 begin
         endtck<=;
         case(num)
            :begin if(EN) begin num<=;endtck<=;end end
             :begin endtck<=;num<=;end
             :begin num<=;temp<=datain;endtck<=;end
             :begin TX<=;num<=;temp1<=temp;endtck<=;end
             :begin count<=count+;endtck<=;if(count<) begin  temp1<=temp1>>;TX<=temp1[];num<=;end else begin count<=; num<=;end  end
             :begin TX<=;endtck<=;num<=;end
             endcase
 end
 endmodule

 module FIFO(input clkin,input write,input [:] datain,input clkout,input read,output reg [:]  dataout,output reg empty,output reg full);
 reg [:]stack[:];
 reg [:]data_in_point=;
 reg [:] data_in_count=;
 reg [:]data_out_point=;
 reg [:] data_in_num=;
 reg[:] data_out_num=;
 reg  empty1;
 always@(posedge clkin)
 begin     

                         case(data_in_num)
                            :begin full<=; data_in_num<=;empty1<=;end
                             :if(write) begin if((data_in_count-data_out_point)>'h3fff) begin full<=1;data_in_num<=1;end else begin data_in_point<=data_in_count[9:0];data_in_num<=2;full<=0;end end
                             :begin stack[data_in_point]<=datain;data_in_count<=data_in_count+;data_in_num<=;empty1<=;end
                          endcase

 end
 always@(posedge clkout)
 begin 

                     case(data_out_num)
                         :if(empty1)begin data_out_num<=;end else begin if((data_in_count-data_out_point)==) begin empty<=; data_out_num<=;end else begin empty<=;data_out_num<=;end end
                         :if(read) begin dataout<=stack[data_out_point];data_out_num<=;if(data_out_point=='h3fff)data_out_point<=0; else data_out_point<=data_out_point+1; end else data_out_num<=1;
                      endcase

 end 

 endmodule

以下为生成“黑匣子”以及调用过程。

1、源工程和目标工程器件必须一致。先对源工程进行全编译，然后点击project-》Export Design Partition 生成RX232.qxp文件

2、把RX232.qxp加入到目标工程，新建实例化文件。然后点击Processing-》Start-》Start Analysis &Elaboration。

以下为目标工程文件代码：

module RX(input CLK50,output TX);
reg write;
reg [:] datain;
RX232 M0(CLK50,write,datain,TX);
always@(posedge CLK50)
begin
    write<=;
    datain<='haa;
end
endmodule