Qt automatically searches the serial port number list

@ Function:
Serialportlist class enables real-time scanning of currently available serial ports.
Or when the existing serial port disappears, the serialportlist class will issue a qstringlist type
The onnewserialport and qstringlist objects store the currently available serial devices.

@ Usage:
1. the QT version must be later than 5.1;

2. Add the qserialport module when creating the QT project file. That is, in the XXX. Pro File
Qt + = SerialPort

3. Define a Cao in the application to respond to the serialportlist signal and obtain the serial port list.
Void onnewportlist (qstringlist portname ){
UI-> comboboxcomlist-> clear ();
UI-> comboboxcomlist-> additems (portname );
}

4. Construct the serialprot object in the application and connect the onnewserialport signal:
Portlist = new serialportlist (200 );
Connect (portlist, signal (onnewserialport (qstringlist )),\
This, slot (onnewportlist (qstringlist )));

5. Enable Scanning
Portlist-> scanstart ();

 

 

Serialportlist. h

# Ifndef serialportlist_h # define serialportlist_h # include <qtimer> # include <qdebug> # include <qserialport> # include <qstringlist> # include <qserialportinfo>/* @ communication: * worldsing.cnblogs.com ** @ function: * serialportlist class scans the currently available serial ports in real time. When a new serial port * or an existing serial port disappears, the serialportlist class sends out a * signal of the qstringlist type onnewserialport and stores the currently available serial devices in the qstringlist object. ** @ Usage: * 1. The QT version must be later than 5.1. ** 2. Add the qserialport module when creating the QT project file. That is, in XXX. add QT + = SerialPort ** to the Pro file *. Define a Cao in the application to respond to the serialportlist signal and obtain the serial port list * void onnewportlist (qstringlist portname) {* UI-> comboboxcomlist-> clear (); * UI-> comboboxcomlist-> additems (portname); *} ** 4. Build the serialprot object in the application, signal of onnewserialport connection: * portlist = new serialportlist (200); * connect (portlist, signal (onnewserialport (Q Stringlist), * This, slot (onnewportlist (qstringlist); ** 5. enable scanning * portlist-> scanstart (); */# define debug_infor_en 0 class serialportlist: public qobject {q_objectpublic: serialportlist (); serialportlist (quint16 );~ Serialportlist (); quint16 scancyclems; qtimer * timer; qstringlist oldportstringlist; void scanstart (); void scanstop (); Public slots: void ontimeout (); signals: void onnewserialport (qstringlist) ;};# endif // serialportlist_h

 

Serialportlist. cpp

# Include "serialportlist. H "// Default Construction serialportlist: serialportlist () {timer = new qtimer; scancyclems = 200; oldportstringlist. clear (); Connect (timer, signal (timeout (), this, slot (ontimeout () ;}// custom scan cycle to construct serialportlist :: serialportlist (quint16 cyclems) {timer = new qtimer; scancyclems = cyclems; oldportstringlist. clear (); Connect (timer, signal (timeout (), this, slot (ontimeout ();} serialportlist ::~ Serialportlist () {Delete timer;} // start scanning void serialportlist: scanstart () {timer-> stop (); timer-> Start (scancyclems );} // stop scanning void serialportlist: scanstop () {timer-> stop ();} // periodic scanning service void serialportlist: ontimeout () {qstringlist newportstringlist; // search for the serial foreach (const qserialportinfo & info, qserialportinfo: availableports () {# If debug_infor_en qdebug () <"name:" <info. portname (); qdebug () <"descr Iption: "<info. description (); qdebug () <"Manufacturer:" <info. manufacturer (); # endif newportstringlist + = info. portname ();} // update the old serial port list if (newportstringlist. size ()! = Oldportstringlist. Size () {oldportstringlist = newportstringlist; emit onnewserialport (oldportstringlist );}}

Qt automatically searches the serial port number list