使用 Multiprocessing 在 python3 中创建 pyserial.write()、.read() 进程

Question

使用的设备：使用 USB 集线器连接到 Beaglebone AI 的 Beaglebone_AI 和 2 个 STM32 核。

想法：Beaglebone 使用 python3 脚本，使用多处理和 pyserial 创建 3 个进程：

过程 1 - 从 STM32 #1 请求一个字符串并将该字符串添加到 FIFO 队列

过程 2 - Function 写入来自 STM32 #2 的所有响应

通过 switch 语句从 FIFO 队列 go 处理 3 -.get() 以处理来自 STM32 #1 的字符串或用户命令。

问题： - 似乎有时 pyserial.write() 不发送用户命令或数据。

Pyserial.read() 和.write() 可以同时使用吗？

这是我的 function 进程，它打印它收到的所有内容：

def writeall(serial_port, q2):
    all_bytes = []
    while True:
            try:
                bytesToRead = serial_port.inWaiting()
                data = serial_port.read(bytesToRead).decode('utf-8')
                
                if not data:
                    pass
                    
                else:
                    
                    if data == '\n':
                        data = ''.join(all_bytes)
                        #Print to screen everything
                        print(data, end = '\033[K\n\n', flush=True)
                        all_bytes.clear()
                        #serial_port.reset_input_buffer()

                    else:
                        #append all the bytes that are being received
                        all_bytes.append(str(data))
                        
            except (OSError,serial.serialutil.SerialException) as e:
                print(f'Actuator Controller: {e}')  ```

**This is my serial port config:**

``` def opening_port(q2):
    global serial_port
    try:
            a =""
            for p in ports:
                #if 'COM9' in p.device: #for windows
                if "066BFF343633464257245637" in p.serial_number: #my nucleo 
                    a = p.device
                    # Port initialization 
                    serial_port = serial.Serial( 
                    port= a,
                    baudrate=9600, 
                    bytesize= serial.EIGHTBITS, 
                    parity= serial.PARITY_NONE, 
                    stopbits= serial.STOPBITS_ONE, 
                    timeout= 1)
                    
            # Discarding anything in the I/O buffer.        
            #serial_port.reset_output_buffer()
            #serial_port.reset_input_buffer()     

            return serial_port ```


**ANd this is pyserial .write() function that uses the same port as the writeall function process**


``` def write_comand(comand):
    try:
        #Reset the buffer before sending a command 
        serial_port.reset_output_buffer()
        serial_port.reset_input_buffer()

        serial_port.write(bytes(comand,'utf8'))
        # Testing wheter the Queue is getting the user commands and if we are actually sending them 
        
        if '3E12' in str(comand):
            pass
        else : 
            print(f" cmd sent {comand}\n")
                
        #time.sleep(0.005)

    except (OSError,serial.serialutil.SerialException) as e:
            print (f" There was a problem communicating with AC: {e}\n")
            print('Resetting Actuator Controller...\n')
            write_comand('B6D8\r')# reset command ```