Qt Serial Port Baud Rates
Along the lines of the documentation, and one where I write out all the baud rate information. You open all port available and then you try to do something wrong. SetBaudRate(QSerialPort::Baud57600)) qDebugserial.errorString; if(!serial.setDataBits(QSerialPort::Data8)) qDebugserial.
To help developers support the iKonvert gateway in the most efficient and cost effective way possible, Digital Yacht have created a QT based Application that demonstrates and provides source code examples of how different commands can be used to control and read the gateway.
As well as providing all of the source code, we have compiled and included a Windows executable of the QT App. It does not need installing just run the iKonvert_Tool.exe file and you will see this window.
If the gateway is the only USB Serial Port device connected then it will automatically select it and set the baud rate to 230400. If it shows a different COM port, then click the Settings cog-wheel and this window will open.
In the settings window you can select…
- The COM port, baud rate and other serial port settings
- 'Local echo' mode so that commands you send are displayed in the terminal
- 'Normal' initialisation mode or if un-ticked 'All' mode will be selected
- Base64 encoding display (default is HEX for ease of reading)
- Whether the Network Status Messages are displayed (can create too much clutter)
- The CSV log file you want to replay and the PGN TX rate it replays at
- Which RX and TX PGNs are included in the gateway's TX/RX Lists
- All ON - ticks all PGNs
- All OFF - unticks all PGNs
- Load - displays the current lists stored in the gateway
- Save - updates the gateway's TX/RX Lists with the currently display PGNs
- Reset – does a factory reset
Once you have configured the settings you want, click the OK button and the commands will be sent to the gateway and you will be able to see them in the main Terminal Window.
From left to right, the icons are;
Now you can initialise the gateway and make it go 'On Bus' by clicking the Connect icon and you will see lots of RX PGN Sentences appear, along with the Network Status Messages (N.S.M), if you have set these to display in the Settings.
You can make the gateway go 'Off Bus' by clicking the Disconnect button and you can clear the terminal window by clicking the Clear icon.
You can record all of the received PGNs to a CSV file for future playback by clicking the Record button and then stop the recording by clicking the Stop button to the right of the Record button.
You can playback the CSV file by selecting the file in the Settings window and also the TX rate in milliseconds and then clicking the Play button. To stop playback click the Stop button to the right of the Play button.
You can transmit a System Time PGN (126992) by clicking the Time button – it takes the date and time from the computer's real time clock.
You can send any TX PGN that you construct and copy to the clipboard by clicking the Send button.
The QT Test Tool App has been compiled for Windows and the executable will run on any Win7/8/10 PC. Full source code is provided if you wish to compile the QT app for LINUX or Mac.
-->Definition
Examples
The following code example demonstrates the use of the SerialPort class to allow two users to chat from two separate computers connected by a null modem cable. In this example, the users are prompted for the port settings and a username before chatting. Both computers must be executing the program to achieve full functionality of this example.
Remarks
Use this class to control a serial port file resource. This class provides synchronous and event-driven I/O, access to pin and break states, and access to serial driver properties. Additionally, the functionality of this class can be wrapped in an internal Stream object, accessible through the BaseStream property, and passed to classes that wrap or use streams.
The SerialPort class supports the following encodings: ASCIIEncoding, UTF8Encoding, UnicodeEncoding, UTF32Encoding, and any encoding defined in mscorlib.dll where the code page is less than 50000 or the code page is 54936. You can use alternate encodings, but you must use the ReadByte or Write method and perform the encoding yourself.
You use the GetPortNames method to retrieve the valid ports for the current computer.
If a SerialPort object becomes blocked during a read operation, do not abort the thread. Instead, either close the base stream or dispose of the SerialPort object.
Constructors
| SerialPort() | Initializes a new instance of the SerialPort class. |
| SerialPort(IContainer) | Initializes a new instance of the SerialPort class using the specified IContainer object. |
| SerialPort(String) | Initializes a new instance of the SerialPort class using the specified port name. |
| SerialPort(String, Int32) | Initializes a new instance of the SerialPort class using the specified port name and baud rate. |
| SerialPort(String, Int32, Parity) | Initializes a new instance of the SerialPort class using the specified port name, baud rate, and parity bit. |
| SerialPort(String, Int32, Parity, Int32) | Initializes a new instance of the SerialPort class using the specified port name, baud rate, parity bit, and data bits. |
| SerialPort(String, Int32, Parity, Int32, StopBits) | Initializes a new instance of the SerialPort class using the specified port name, baud rate, parity bit, data bits, and stop bit. |
Fields
| InfiniteTimeout | Indicates that no time-out should occur. |
Properties
| BaseStream | Gets the underlying Stream object for a SerialPort object. |
| BaudRate | Gets or sets the serial baud rate. |
| BreakState | Gets or sets the break signal state. |
| BytesToRead | Gets the number of bytes of data in the receive buffer. |
| BytesToWrite | Gets the number of bytes of data in the send buffer. |
| CanRaiseEvents | Gets a value indicating whether the component can raise an event. (Inherited from Component) |
| CDHolding | Gets the state of the Carrier Detect line for the port. |
| Container | Gets the IContainer that contains the Component. (Inherited from Component) |
| CtsHolding | Gets the state of the Clear-to-Send line. |
| DataBits | Gets or sets the standard length of data bits per byte. Rural king guns for sale. |
| DesignMode | Gets a value that indicates whether the Component is currently in design mode. (Inherited from Component) |
| DiscardNull | Gets or sets a value indicating whether null bytes are ignored when transmitted between the port and the receive buffer. |
| DsrHolding | Gets the state of the Data Set Ready (DSR) signal. |
| DtrEnable | Gets or sets a value that enables the Data Terminal Ready (DTR) signal during serial communication. |
| Encoding | Gets or sets the byte encoding for pre- and post-transmission conversion of text. |
| Events | Gets the list of event handlers that are attached to this Component. (Inherited from Component) |
| Handshake | Gets or sets the handshaking protocol for serial port transmission of data using a value from Handshake. |
| IsOpen | Gets a value indicating the open or closed status of the SerialPort object. |
| NewLine | Gets or sets the value used to interpret the end of a call to the ReadLine() and WriteLine(String) methods. |
| Parity | Gets or sets the parity-checking protocol. |
| ParityReplace | Gets or sets the byte that replaces invalid bytes in a data stream when a parity error occurs. |
| PortName | Gets or sets the port for communications, including but not limited to all available COM ports. |
| ReadBufferSize | Gets or sets the size of the SerialPort input buffer. |
| ReadTimeout | Gets or sets the number of milliseconds before a time-out occurs when a read operation does not finish. |
| ReceivedBytesThreshold | Gets or sets the number of bytes in the internal input buffer before a DataReceived event occurs. |
| RtsEnable | Gets or sets a value indicating whether the Request to Send (RTS) signal is enabled during serial communication. |
| Site | Gets or sets the ISite of the Component. (Inherited from Component) |
| StopBits | Gets or sets the standard number of stopbits per byte. |
| WriteBufferSize | Gets or sets the size of the serial port output buffer. |
| WriteTimeout | Gets or sets the number of milliseconds before a time-out occurs when a write operation does not finish. |
Methods
| Close() | Closes the port connection, sets the IsOpen property to |
| CreateObjRef(Type) | Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject) |
| DiscardInBuffer() | Discards data from the serial driver's receive buffer. |
| DiscardOutBuffer() | Discards data from the serial driver's transmit buffer. |
| Dispose() | Releases all resources used by the Component. (Inherited from Component) |
| Dispose(Boolean) | Releases the unmanaged resources used by the SerialPort and optionally releases the managed resources. |
| Equals(Object) | Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetHashCode() | Serves as the default hash function. (Inherited from Object) |
| GetLifetimeService() | Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject) |
| GetPortNames() | Gets an array of serial port names for the current computer. |
| GetService(Type) | Returns an object that represents a service provided by the Component or by its Container. (Inherited from Component) |
| GetType() | Gets the Type of the current instance. (Inherited from Object) |
| InitializeLifetimeService() | Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject) |
| MemberwiseClone() | Creates a shallow copy of the current Object. (Inherited from Object) |
| MemberwiseClone(Boolean) | Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject) |
| Open() | Opens a new serial port connection. |
| Read(Byte[], Int32, Int32) | Reads a number of bytes from the SerialPort input buffer and writes those bytes into a byte array at the specified offset. |
| Read(Char[], Int32, Int32) | Reads a number of characters from the SerialPort input buffer and writes them into an array of characters at a given offset. |
| ReadByte() | Synchronously reads one byte from the SerialPort input buffer. |
| ReadChar() | Synchronously reads one character from the SerialPort input buffer. |
| ReadExisting() | Reads all immediately available bytes, based on the encoding, in both the stream and the input buffer of the SerialPort object. |
| ReadLine() | Reads up to the NewLine value in the input buffer. |
| ReadTo(String) | Reads a string up to the specified |
| ToString() | Returns a String containing the name of the Component, if any. This method should not be overridden. (Inherited from Component) |
| Write(Byte[], Int32, Int32) | Writes a specified number of bytes to the serial port using data from a buffer. |
| Write(Char[], Int32, Int32) | Writes a specified number of characters to the serial port using data from a buffer. |
| Write(String) | Writes the specified string to the serial port. |
| WriteLine(String) | Writes the specified string and the NewLine value to the output buffer. |
Events
| DataReceived | Indicates that data has been received through a port represented by the SerialPort object. |
| Disposed | Occurs when the component is disposed by a call to the Dispose() method. (Inherited from Component) |
| ErrorReceived | Indicates that an error has occurred with a port represented by a SerialPort object. |
| PinChanged | Indicates that a non-data signal event has occurred on the port represented by the SerialPort object. |