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Hello,
Is it possible to use sockets with the Stand-Alone LWIP? I would like to use the web-server from Altera for the MicroC/OS-II which is based on sockets but I’m not able to bring it to work. Does anyone have experiences in this topic? Bye, niosIIuserLink Copied
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Sorry the answer is No. The use of the sockets API requires a threaded environment.
Below is the quote from the LWIP documentation, which can be found in the file rawapi.txt in the src/downloads/lwip-0.6.3/doc directory Raw TCP/IP interface for lwIP 0.5 "lwIP provides two Application Program's Interfaces (APIs) for programs to use for communication with the TCP/IP code: the sequential API (often just called "the API") and the raw TCP/IP interface. This document is intended as a description of the latter. For lwIP versions lower than 0.5, this API was not documented. The sequential API provides a way for ordinary, sequential, programs to use the lwIP stack. It is quite similar to the BSD socket API. The model of execution is based on the open-read-write-close paradigm. Since the TCP/IP stack is event based by nature, the TCP/IP code and the application program must reside in different execution contexts (threads). The raw TCP/IP interface allows the application program to integrate better with the TCP/IP code. Program execution is event based by having callback functions being called from within the TCP/IP code. The TCP/IP code and the application program both run in the same thread. The sequential API has a much higher overhead and is not very well suited for small systems since it forces a multithreaded paradigm on the application."- Mark as New
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Hello rugbybloke,
Thank you for this hint now some thinks are clearer. Bye, niosIIuser
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