PIC18F67J60上的TCP/IP lite堆栈似乎非常慢

你好，我使用PIC18F67 J60控制器，尝试实现Modbus TCP/IP。为此，我使用TCP/IP Lite堆栈。该控制器将作为一个远程服务器，并将具有一些DI，其状态将被发送到PC，将充当客户端。最初，我实现了堆栈，并测试了演示服务器和Client。C文件，并能够成功地与TeCPPIPdemo.JAR文件建立通信。NT的Modbus TCP协议，我对TCPyServelDimo.c文件做了微小的更改，而不是回送所接收的任何内容，控制器将返回的响应发送给匹配的Modbus查询。我需要从微控制器查询每200到300毫秒的数据。从最初的响应中，我没有得到来自控制器的响应。只有当我在PC端增加轮询时间（到3秒以上）时，我才能接收到每个查询的连续响应。但是即使在这种情况下，PC在控制器响应之前多次重试（这是使用WiReSARK进行的）。我想知道我的需求是否可以使用这个控制器和这个堆栈来执行，如果需要的话，我需要做什么来加快PIC方面的TCP处理。样例代码，如果需要，WiRESHARK PICS。我现在使用PIC-OLIMEX开发板测试这个。



      以下为原文

    Hi,

I'm using PIC18F67J60 controller and trying to implement Modbus TCP/IP. I am using the TCP/IP Lite Stack for this purpose. The controller will act as a Remote Server and will have some DI whose status will be sent to a PC that will act as the Client.

Initially I implemented the Stack and tested the demo server and client .c files and was able to successfully establish communication with the TCPIP_Demo.jar file.

To implement the Modbus TCP protocol, I made minor changes to the tcp_server_demo.c file and instead of echoing back whatever is received, the controller sends back response to a matching Modbus query.

I need to query the data from the microcontroller every 200 - 300 ms. When I poll at this speed from PC, apart from an initial response I get no more responses from the controller. Only when I increase the polling time on PC side (to above 3 seconds) I'm able to receive continuous response for each query. But even in that case, the PC retries multiple times before the controller responds (this was observed using Wireshark).

I would like to know if my requirement can be executed using this controller and this stack, and if so what I need to do to speed up the TCP handling on the PIC side.

I can provide the sample code, wireshark pics if required.

I'm currently testing this using the PIC-OLIMEX development board.