树莓派4卡在serial.Serial中()

Question

我尝试使用RS232HAT和树莓派4，我发现了这个问题。

这是我的代码。

import serial
#print(serial.__file__)

dev = "/dev/ttySC0"
Baudrate = 115200

ser = serial.Serial(dev, Baudrate) <<< Stuck in this Function
print("START")
try:
    while(1):
        data = ser.read(value)
        print(data.decode("utf-8"))

except KeyboardInterrupt:
    print("EXIT")
    exit()

当我用键盘中断的时候。程序将显示此日志。

回溯(最近一次调用)：

File "/home/pi/Desktop/2-CH-RS232-HAT/python/examples/main.py", line 15, in <module>
    ser = config.config(dev = "/dev/ttySC0")

File "/home/pi/Desktop/2-CH-RS232-HAT/python/lib/waveshare_2_CH_RS232_HAT/config.py", line 12, in __init__
    ser.serial = serial.Serial(ser.dev, Baudrate)

File "/usr/lib/python3/dist-packages/serial/serialutil.py", line 240, in __init__
    self.open()

File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 265, in open
    self.fd = os.open(self.portstr, os.O_RDWR | os.O_NOCTTY | os.O_NONBLOCK)

KeyboardInterrupt

我的可用设备：

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Answer 1

例如，您必须链接该文件。在-s /dev/ttySC0 /dev/ttyS80中，有时无法读取真实的串行信息