到现场后,尝试用测试程序打开串口,发现报异常“'PortName' cannot be set while the port is open”,所有的串口都打不开,都报异常,但是用串口助手打得开。 由于是第一次遇到这样的问题,查了好久的资料还是不晓得是什么原因。尝试过以下几个解决办法: 1.从另外可用的电脑拷贝程序运行(不...
Opens a new serial port connection. C# publicvoidOpen(); Exceptions UnauthorizedAccessException Access is denied to the port. -or- The current process, or another process on the system, already has the specified COM port open either by aSerialPortinstance or in unmanaged code. ...
Opens a new serial port connection. csharp 复制 public void Open (); Exceptions UnauthorizedAccessException Access is denied to the port. -or- The current process, or another process on the system, already has the specified COM port open either by a SerialPort instance or in unmanaged ...
Opens a new serial port connection. C# 複製 public void Open (); Exceptions UnauthorizedAccessException Access is denied to the port. -or- The current process, or another process on the system, already has the specified COM port open either by a SerialPort instance or in unmanaged code....
I do only one attempt to open the port. If the device is not found then depending on the user input I would decide whether to make one more attempt or not. I query the device for product ID and Vendor ID. To find the port to which my device is connected to I do the following, ...
Can't open the serial(COM) port. 选择语言:从中文简体中文翻译英语日语韩语俄语德语法语阿拉伯文西班牙语葡萄牙语意大利语荷兰语瑞典语希腊语捷克语丹麦语匈牙利语希伯来语波斯语挪威语乌尔都语罗马尼亚语土耳其语波兰语到中文简体中文翻译英语日语韩语俄语德语法语阿拉伯文西班牙语葡萄牙语意大利语荷兰语瑞典语希腊语捷克...
使用serial.Serial创建实体的时候会去打开串口,之后可以使用is_open开判断下是否串口是否打开正常。 def DOpenPort(portx, bps, timeout): try: # 打开串口,并得到串口对象 ser = serial.Serial(portx, bps, timeout=timeout) # 判断是否打开成功
Access to the path 'C:\' is denied. access to the port com1 is denied c# Access to the registry key 'HKEY_CLASSES_ROOT\name of the class' is denied. access variable from another function Access Variables in Different Projects in a Solution Accessibility of parent's class fields from chil...
SerialPort(port_mux,config_port_mux); muxport.open(abrir); function abrir(error){ if (error){ console.log('failed to open: '+error); } else{ console.log('open '+port_mux); muxport.on('data',rx_data_mux); } } In a previous version (Im not sure which, a version in February...
You said your com port is COM16, but you didn't select the COM16 in your terminal window. This is the screenshot from my side. The port just have COM1-COM8 to select, so you need to modify your com port number to COM1-COM8 in the device manager. Wish it help...