Linux的串口监听器和跨preTER？ [英] Linux serial port listener and interpreter?

问题描述

我使用的是串行设备的项目，我想要实现PC端，监听由串行设备，除preting查询发送的命令，运行某些code根据查询，并发送回结果

I'm using a serial device for a project, and what I'm trying to accomplish PC side, is listening for a command sent by the serial device, interpreting the query, running some code depending on the query, and transmitting back the result.

说实话，我尝试了使用PHP作为监听器，和它的作品，遗憾的是使脚本充当接收器所需的无限循环，加载CPU到25％。因此，它不是真正的最好的选择。

To be honest I tried out using PHP as the listener, and it works, unfortunately the infinite loop required to make the script act as a receiver, loads the CPU to 25%. So it's not really the best option.

我用cygwin的，现在，我想使用Linux的本机命令来创建一个bash脚本。

I'm using cygwin right now, I'd like to create a bash script using linux native commands.

我可以用接收数据：

cat /dev/ttyS2

和发送响应与：

echo "command to send" > /dev/ttyS2

我的问题是，如何让我的听众自动给能够接收和发送数据？主要的问题我也有，其实是我该如何停止在猫的/ dev / ttyS2 命令，一旦接收到信息，把它放入，然后我可以用一个开关，或一系列的，如果比较的变量否则会阻塞。之后发回的响应，并从头开始循环？

My question is, how do I make an automated listener to be able to receive and send data? The main issue I have, is actually how do I stop the cat /dev/ttyS2 command once information was received, put it into a variable which then I could compare with a switch, or a series of if else then blocks. Afterwards send back a response and start the cycle all over again?

感谢

推荐答案

这是你要找的？不是

while read -r line < /dev/ttyS2; do
  # $line is the line read, do something with it
  echo $result > /dev/ttyS2
done

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