Project Practice of Go Language Serial Communication

Go language (Golang) is a modern, efficient and concurrency-enabled programming language that performs well in handling hardware communication tasks, especially in implementing serial communication. The following is a detailed introduction to the key steps, library usage and sample code for implementing serial communication in Go language:

Key Steps

• Select and install the serial port library: There are many open source libraries in Go language that support serial communication, such as/tarm/goserialand/influxdata/goiox. These libraries provide convenient interfaces to configure, open, read and write serial ports, and handle errors. Select a suitable library and add it to your project dependencies.

• Configure the serial port: Configure serial port parameters, including port number (such as/dev/ttyUSB0orCOM1), baud rate (such as9600、115200, etc.), data bits, stop bits, check bits, etc. These parameters need to match the connected peripherals.

• Open the serial port: Use the functions provided by the selected library to open the serial port of the specified configuration. This usually returns an object representing a serial port connection for subsequent data read and write.

• Data reading and writing：

  • Write operation: Send data to the serial port. Usually called objectsWrite()Method, pass in the byte slice to be sent ([]byte）。
  • Read operation: Receive data from the serial port. Usually set the appropriate read buffer size and then call the object'sRead()Methods or channels are used to receive data asynchronously.

• Error handling: Listen and handle possible errors, such as serial port opening failure, read and write operation timeout, data verification error, etc. Close the serial port at appropriate times to free up resources.

• Concurrent control(Optional): If you need to access the serial port concurrently in multiple goroutines, you need to ensure that the access is synchronized correctly and avoid race conditions. Mutex locks can be used () or other synchronization primitives to protect shared resources.

Sample code (using the /tarm/goserial library)

The following is a simple Go serial communication example, showing how to configure the serial port, open the serial port, send data, and receive data:

package main

import (
	"bufio"
	"log"
	"os"
	"time"

	"/tarm/serial"
)

func main() {
	// Serial port configuration	config := &{
		Name: "/dev/ttyUSB0", // Please replace it with the actual serial port name		Baud: 115200,
		Size: 8,
		Parity: ,
		StopBits: ,
	}

	// Open the serial port	port, err := (config)
	if err != nil {
		(err)
	}
	defer ()

	// Send data	message := []byte("Hello, World!\r\n")
	written, err := (message)
	if err != nil {
		("Error writing to port: %v", err)
		return
	}
	("Sent %d bytes: %q", written, message)

	// Receive data	reader := (port)
	for {
		line, _, err := ()
		if err != nil {
			("Error reading from port: %v", err)
			break
		}
		("Received %d bytes: %q", len(line), line)

		// Process the received data here, such as parsing protocol, updating status, etc.
		// You can adjust the waiting time according to actual needs or use more complex synchronization mechanisms		(100 * )
	}
}

In this example:

• First, the configuration of the serial port is defined, including the port name, baud rate, data bit, check bit and stop bit.
• use()The function opens the configured serial port and ensures that the program closes it before exiting.
• Send the data part, construct the message to be sent (here is a simple string), and call()Write the message to the serial port.
• Receive the data part and create aObjects are used to wrap the serial port and then used in an infinite loop()Read data line by line. After each time a line of data is read, it is printed out and processed (it is an empty implementation here, and the data should be parsed according to the protocol in actual applications). Finally, continue with the next round of reading after a short period of sleep.

Please note that when using it, you need to adjust the above example according to the specific application scenario and device protocol. For example, it may be necessary to process specific command responses, set timeouts, process multi-frame data, process exception recovery, etc.

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