Shulou(Shulou.com)06/01 Report--

This article mainly introduces the example analysis of the Select mechanism in vxworks, which has a certain reference value, and interested friends can refer to it. I hope you will gain a lot after reading this article.

As mentioned earlier, when reading data from a serial port, you usually use the read () function of a basic IO system. While the basic IO operations are in blocking mode, if you read data from multiple serial ports at the same time, you generally have to use multiple tasks, even if the operation of each task is consistent.

In fact, VxWorks provides an operation that blocks multiple serial ports at the same time: Select mechanism

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