![ucos new application wizard ucos new application wizard](https://user-images.githubusercontent.com/37688994/49128856-3a684500-f308-11e8-8742-6358d4bda147.png)
If the application is a separate process, it can pass through the operating system mailbox, message queue, etc. The application layer program can be a separate process or reside in the tcp/ip process. lwip process model: all tcp/ip protocol stacks are in one process, so the tcp/ip protocol The stack is separated from the operating system kernel. In this way, the TCP/IP protocol stack is limited to the specific operating system kernel. The application program is performed through the system call and protocol stack of the operating system Communication. Another way is that the TCP/IP protocol stack is in the operating system kernel. Over-frequency context swich is not advisable.Ģ. Usually for the operating system, task switching is It is a waste of time.
Ucos new application wizard driver#
For Receiving a TCP segment will cause 3 context switches (from the network card driver to the link layer process, from the link layer process to the ip layer process, and from the ip layer process to the TCP process). But the biggest disadvantage is that when the data is transferred across layers, it will cause a context switch.
Ucos new application wizard code#
The advantage of this is that each layer of the network protocol is very clear, and the debugging and understanding of the code is very easy. chain The road layer is a process, and the ip layer is a The tcp layer is a process. Tcp/ip protocol stack process model generally have several ways.ġ.tcp/ip protocols of each layer is a separate process. (9) Support DHCP protocol, dynamically assign IP address. (8) Support for IP fragment added in the new version. (6) Optional Berkeley interface API (in the case of multi-threading) (5) Provide a dedicated internal callback interface (Raw API) to improve application performance (4) Including blocking control, RTT estimation and fast recovery and fast forwarding TCP (Transmission Control Protocol) (3) Including experimental extensions UDP (User Datagram Protocol) (1) Support IP forwarding under multiple network interfaces Run independently without an operating system.
![ucos new application wizard ucos new application wizard](https://community.pega.com/sites/default/files/images/PRPC/articles/40756/newappmenu.png)
Lwip can be transplanted to the operating system, and can
![ucos new application wizard ucos new application wizard](https://cdn.dribbble.com/users/1231641/screenshots/6792188/create_account_step_1.png)
LwIP is a set of open source TCP/IP protocol stack for embedded systems developed by Adam Dunkels of the Swiss Institute of Computer Science. You can go to see Yang Ye heroes lwip Articles and codes ported on ucos. In addition, I have a look at the code of skyeye Yang Ye heroes for my transplant. I wrote today Okay, the first part (process model of lwip) will be posted first, and if you are interested, I will continue to write down. However, due to the recent busyness, the transplantation of lwip is also done in his spare time. One thinks that lwip is a good open source tcp/ip protocol stack, and wants to write out his own transplantation and understanding of lwip. After several days of debugging and removing several bugs, ucos+lwip finally ran relatively well on my 44b0+8019 development board Stable.