找到特定的定界符后，如何从串行中读取数据并进行处理

Question

I have a device, which continues to send data over a serial port. Now I want to read this and process it. The data send this delimiter "!" and as soon as this delimiter appears I want to pause reading to processing the data thats already been received. How can I do that? Is there any documentation or examples that I can read or follow.

Answer 1

For reading data from a serial port you can find a few packages on Github, e.g. tarm/serial.

You can use this package to read data from your serial port. In order to read until a specific delimiter is reached, you can use something like:

config := &serial.Config{Name: "/dev/ttyUSB", Baud: 9600}

s, err := serial.OpenPort(config)
if err != nil {
    // stops execution
    log.Fatal(err)
}

// golang reader interface
r := bufio.NewReader(s)

// reads until delimiter is reached
data, err := r.ReadBytes('\x21')
if err != nil {
    // stops execution
    log.Fatal(err)
}
// or use fmt.Printf() with the right verb
// https://golang.org/pkg/fmt/#hdr-Printing
fmt.Println(data)

See also: Reading from serial port with while-loop