serial-port

问题 I'm using RXXTX java lib to connect to serial ports. I'm using this lib with no problems connecting to /dev/ttyUSB0 (1,2,3,etc). But when I want to connect to /dev/ttyACM0 the port its not found. CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier("/dev/ttyACM0"); the Exception is thrown: gnu.io.NoSuchPortException at gnu.io.CommPortIdentifier.getPortIdentifier(CommPortIdentifier.java:218) I already listed all the ports but no success. 回答1: Processing and USB ports /dev

问题 I'm using RXXTX java lib to connect to serial ports. I'm using this lib with no problems connecting to /dev/ttyUSB0 (1,2,3,etc). But when I want to connect to /dev/ttyACM0 the port its not found. CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier("/dev/ttyACM0"); the Exception is thrown: gnu.io.NoSuchPortException at gnu.io.CommPortIdentifier.getPortIdentifier(CommPortIdentifier.java:218) I already listed all the ports but no success. 回答1: Processing and USB ports /dev

问题 I'm using RXXTX java lib to connect to serial ports. I'm using this lib with no problems connecting to /dev/ttyUSB0 (1,2,3,etc). But when I want to connect to /dev/ttyACM0 the port its not found. CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier("/dev/ttyACM0"); the Exception is thrown: gnu.io.NoSuchPortException at gnu.io.CommPortIdentifier.getPortIdentifier(CommPortIdentifier.java:218) I already listed all the ports but no success. 回答1: Processing and USB ports /dev

问题 I'm learning how to use Boost:asio library with Serial Port. I wrote some code using synchrous write and read and I now want to use asynchrous but it's not working. Simple Example: void readHandler(const boost::system::error_code&,std::size_t); streambuf buf; int main(int argc,char *argv[]){ io_service io; serial_port port(io,PORT); if(port.isopen()){ while(1){ // ... getting std::string::toSend from user ... write(port,buffer(toSend.c_str(),toSend.size())); async_read_until(port,buf,'\n'

问题 I've noticed a number of projectors have RS232 or USB ports that can be used for controlling the projector's functions, i.e. switching inputs and powering on and off. Does anyone know if there's an API around for controlling these functions programmatically? I'm using Java but especially with RS232 I'm guessing that's irrelevant as the protocol will be on a much lower level. If there's not a "standard" around (which I'm guessing there won't be) what would be the suggestion? At the moment I'm

问题 I've noticed a number of projectors have RS232 or USB ports that can be used for controlling the projector's functions, i.e. switching inputs and powering on and off. Does anyone know if there's an API around for controlling these functions programmatically? I'm using Java but especially with RS232 I'm guessing that's irrelevant as the protocol will be on a much lower level. If there's not a "standard" around (which I'm guessing there won't be) what would be the suggestion? At the moment I'm

问题 I've noticed a number of projectors have RS232 or USB ports that can be used for controlling the projector's functions, i.e. switching inputs and powering on and off. Does anyone know if there's an API around for controlling these functions programmatically? I'm using Java but especially with RS232 I'm guessing that's irrelevant as the protocol will be on a much lower level. If there's not a "standard" around (which I'm guessing there won't be) what would be the suggestion? At the moment I'm

问题 I am new to driver stuff. I have tried to debug the kernel driver using serial COM port without success. Could someone show me proper direction how to fix the problem? I am seeing the following messages on kd console. ERROR: DavReadRegistryValues/RegQueryValueExW(4). WStatus = 127 ERROR: DavReadRegistryValues/RegQueryValueExW(5). WStatus = 127 ERROR: DavReadRegistryValues/RegQueryValueExW(6). WStatus = 127 At this time, I pressed Ctl^D and kd console and I am seeing READ: Timeout. READ: Wait

问题 I need a function to read data from a serial port or return if none came within a time interval. E.g. on GNU/Linux you could use poll() or select() + read() . Anything analogous in Windows? Below is something I tried: it ought to work, but the function GetOverlappedResult() is either buggy or not well documented; instead of number of bytes read it reports nothing (not even zero, e.g. if I don't initialize the lpNumberOfBytesTransferred argument, it just contains junk) . // NOTE: the `file`

问题 I need a function to read data from a serial port or return if none came within a time interval. E.g. on GNU/Linux you could use poll() or select() + read() . Anything analogous in Windows? Below is something I tried: it ought to work, but the function GetOverlappedResult() is either buggy or not well documented; instead of number of bytes read it reports nothing (not even zero, e.g. if I don't initialize the lpNumberOfBytesTransferred argument, it just contains junk) . // NOTE: the `file`