The protocol is the secure and reliable form of communication having a set of rules addressed by the source host sender and destination host receiver similar to parallel communication. As already said above that in serial communication data is sent in the form of bits i.
There are several types of serial communication depending on the type of transmission mode and data transfer. In simplex method either of the medium i. So if the sender is transmitting the data then receiver can only accept and vice versa. So simplex method is one-way communication technique. The well-known examples of simplex method are Television and Radio.
In half duplex method both sender and receiver can be active but not at the same time. So if the sender is transmitting then receiver can accept but cannot send and similarly vice versa.
The well-known examples of the half duplex is the internet where the user sends a request for a data and the gets it from server. In full duplex method, both receiver and transmitter can send data to each other at the same time.
The well-known example is mobile phone. Apart from this, for appropriate data transmission, the clock plays important role and it is one of the primary source.
Malfunction of the clock results in unexpected data transmission even sometimes data loss. So, the clock synchronisation becomes very important when using serial communication. The clock is different for serial devices and it is classified in two type viz. It is a point-to-point connection from a master to slave. In this type of interface, all the devices use single CPU bus to share data and clock.
The data transmission becomes faster with same bus to share clock and data. Also there is no mismatch in baud rate in this interface. In transmitter side, there is a shift of the data onto serial line providing the clock as a separate signal as there is no start, stop and parity bits are added to data. In receiver side, the data is being extract using the clock provided by the transmitter and converts the serial data back to the parallel form.
In asynchronous Serial Interface, the external clock signal is absent. The Asynchronous Serial Interfaces can be seen in mostly in long distance applications and are a perfect fit for the stable communication. On the transmitter side , there is a shifting of parallel data onto the serial line using its own clock. Also it adds the start, stop and parity check bits. On the receiver side, the receiver extracts the data using its own clock and convert the serial data back to the parallel form after stripping off the start, stop, and parity bits.
Apart from Clock Synchronization there are certain things to remember when transferring data serially such as Baud Rate, Data bit selection Framing , Synchronisation and error checking. Baud Rate: Baud rate is rate at which the data is transferred between the transmitter and receiver in the form of bits per second bps.
The most commonly used baud rate is But there are other selection of baud rate such as , , , , The more the baud rate will be fats the data will be transferred at a time. Also for the data communication the baud rate has to be same for both transmitter and receiver. Framing: Framing is referred to the number of data bits to be sent from transmitter to receiver. The number of data bits differs in case of application. Most of the application uses 8 bits as the standard data bits but it can be selected as 5, 6 or 7 bits also.
Synchronisation: Synchronization Bits are important to select a chunk of data. SerialPort Class. Full project code:. Where to? Start building the interface by dragging controls from the ToolBox onto the form as shown below: Drag and drop two GroupBox controls from the ToolBox under the Containers sub-Section. Change their Text properties from the Properties pane.
We use a GroupBox control to group controls, in our case, configuration settings controls. We will use this button to connect or disconnect to selected serial ports. We will use this button to send data typed on the screen to the Serial Port.
We set its Enable Properties to false to prevent a user from clicking it before we connect to a port this would generate an error. We will use this button to clear the screen. This is where we will receive data from the Serial port and any data sent to serial port will be displayed here as well. This is where we are going to type our data and click on Send button to send it to the serial port. None, 8, StopBits.
One ;. None , 8 , StopBits. Open ;. Close ;. Write "Your Text When there is data in the receive buffer,. ReadExisting ;. SetText data ;. AppendText text ;. NET Framework: 4. Generic; using System. ComponentModel; using System. Data; using System. Drawing; using System. Linq; using System. Text; using System. Forms; using System. Text; ComPort. Parse cmbBaudRate. Parse typeof Parity , cmbParity.
Close Mobile Search. Trial software. You are now following this Submission You will see updates in your followed content feed You may receive emails, depending on your communication preferences. Simple GUI for serial port communication version 1. Set up a serial connection to send and receive messages. View Version History. Follow Download. Overview Functions Reviews 21 Discussions Cite As Roger Yeh Requires Instrument Control Toolbox.
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