我正在尝试使用运行在Ubuntu主机上的PySerial来自动测试嵌入式控制器（EC）。（例如，PuTTY）并整天从EC获得响应。然而，当我尝试使用PySerial程序做同样的事情时，EC在一段时间后停止回显命令，就在回显命令的中间。从那时起，EC停止响应程序，包括不发送被中断的命令的结果。
如果我终止程序并尝试再次使用终端连接到EC，则EC无响应。如果发生外部事件，导致EC将输出写入终端，则该信息将正确显示。问题一直存在，直到我重新启动EC -这也会删除问题发生时EC上发生的任何日志。（日志只能通过串行端口访问...）
看起来PySerial正在做的事情导致EC的输入处理停止。（XON）希望有一些软件流控制正在进行，这并不明显，但这并没有产生影响。我试过在程序中发送交替命令，在发送命令之间发送空白行，在命令发送之间插入延迟-但它死了，每次，在处理了几个命令之后。
这是我目前使用的脚本：

import serial
from datetime import datetime

ser = serial.Serial('/dev/ttyUSB0', 115200, timeout=1)

print('Starting up')
# send an empty command to ensure a prompt is displayed
ser.write(b'\r\n')

commandToSend = 'battery current'
failed = 0
running = True
while running:
    while running:
        # read from the EC until a timeout occurs with no data available
        try:
            # wait for the EC prompt
            rcvData = ser.read_until(b' ec> ')
            now = datetime.now().time()
            print('{}\tRead from device: "{}"'.format(now, rcvData))
            decoded = rcvData.decode('ascii')
            if len(decoded) == 0:
                # timeout, nothing read from EC, send next command
                failed += 1
                break
            # normalize line terminations then split the data into lines
            lines = decoded.replace('\r\r\n','\r\n').split('\r\n')
            for line in lines:
                print('{}{}'.format(' '*34, line))
            break
        except KeyboardInterrupt:
            print('\nKeyboard interrupt, aborting')
            running = False
            break
        except Exception as e:
            print(e)  # this branch never executes, from my observation
            pass
    now = datetime.now().time()
    if failed > 1:
        print('{}\tCommunication with the EC has failed'.format(now))
        break
    if running:
        # send the command when there's no data to read
        print('{}\tWriting: "{}\\r\\n"'.format(now, commandToSend))
        ser.write('{}\r\n'.format(commandToSend).encode())
        ser.flush()

字符串
运行上述脚本的典型结果如下：

./ec-uart-test.py

型
输出量：

Starting up
20:19:10.620998     Read from device: "b'\r\n ec> '"

                                   ec>
20:19:11.622234     Read from device: "b''"
20:19:11.622345     Writing: "battery current\r\n"
20:19:11.627921     Read from device: "b'\r\n ec> '"

                                   ec>
20:19:11.628690     Read from device: "b'battery current\r\n0ma\r\r\n ec> '"
                                  battery current
                                  0ma
                                   ec>
20:19:11.628777     Writing: "battery current\r\n"
20:19:11.635899     Read from device: "b'\r\n ec> '"

                                   ec>
20:19:12.637335     Read from device: "b'battery cu'"
                                  battery cu
20:19:12.637439     Writing: "battery current\r\n"
20:19:13.644800     Read from device: "b''"

20:19:14.646080     Read from device: "b''"
20:19:14.646172     Communication with the EC has failed

型
除了破解EC并在其上放置硬件分析器之外，我还应该尝试其他方法来使此代码工作吗？