Serial Port Read To - joarchives98’s diary

This example demonstrates basic serial features. This example opens one VISA resource and configures one COM port. It then performs a serial port read, a serial port.

Serial. read Description. Reads incoming serial data. read inherits from the Stream utility class. Syntax. Serial.read Arduino Mega only: Serial1.read.
In computing, a serial port is a serial communication physical interface through which information transfers in or out one bit at a time in contrast to a parallel.

Dec 02, 2015 Serial Port Reader/Writer download. Serial Port Reader/Writer 2015-12-02 :52 free download. Serial Port Reader/Writer Only updated to add.

Read Method Byte, Int32, Int32

Read Method Char, Int32, Int32

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. NET Framework current version

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. NET Framework 4

. NET Framework 3.5

. NET Framework 3.0

. NET Framework 2.0

Reads a number of bytes from the SerialPort input buffer and writes those bytes into a byte array at the specified offset.Namespace:

System.IO.Ports

Assembly:

System in System.dll Syntax

C C F VB

Copy

public int Read

byte buffer,

int offset,

int count

buffer

Type:

System.Byte

The byte array to write the input to. offset

System.Int32

The offset in buffer at which to write the bytes. count

The maximum number of bytes to read. Fewer bytes are read if count is greater than the number of bytes in the input buffer.

The number of bytes read.Exceptions

Exception

Condition

ArgumentNullException

The buffer passed is null. InvalidOperationException

The specified port is not open. ArgumentOutOfRangeException

The offset or count parameters are outside a valid region of the buffer being passed. Either offset or count is less than zero. ArgumentException

offset plus count is greater than the length of the buffer. TimeoutException

No bytes were available to read.Remarks

If it is necessary to switch between reading text and reading binary data from the stream, select a protocol that carefully defines the boundary between text and binary data, such as manually reading bytes and decoding the data.

Because the SerialPort class buffers data, and the stream contained in the BaseStream property does not, the two might conflict about how many bytes are available to read. The BytesToRead property can indicate that there are bytes to read, but these bytes might not be accessible to the stream contained in the BaseStream property because they have been buffered to the SerialPort class.

The Read method does not block other operations when the number of bytes read equals count but there are still unread bytes available on the serial port. Version Information

.NET Framework

Available since 2.0

See Also

Read Overload

SerialPort Class

System.IO.Ports Namespace

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SerialPort.Read Method (Byte[], Int32, Int32) (System.IO.Ports)

Reads up to the NewLine value in the input buffer.Namespace:

System.IO.Ports

Assembly:

System in System.dll

Note that while this method does not return the NewLine value, the NewLine value is removed from the input buffer.

By default, the ReadLine method will block until a line is received. If this behavior is undesirable, set the ReadTimeout property to any non-zero value to force the ReadLine method to throw a TimeoutException if a line is not available on the port.

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. This code example is part of a larger code example provided for the SerialPort class.

public static void Main

string name;

string message;

StringComparer stringComparer StringComparer.OrdinalIgnoreCase;

Thread readThread new Thread Read ;

// Create a new SerialPort object with default settings.

_serialPort new SerialPort ;

// Allow the user to set the appropriate properties.

_serialPort.PortName SetPortName _serialPort.PortName ;

_serialPort.BaudRate SetPortBaudRate _serialPort.BaudRate ;

_serialPort.Parity SetPortParity _serialPort.Parity ;

_serialPort.DataBits SetPortDataBits _serialPort.DataBits ;

_serialPort.StopBits SetPortStopBits _serialPort.StopBits ;

_serialPort.Handshake SetPortHandshake _serialPort.Handshake ;

// Set the read/write timeouts

_serialPort.ReadTimeout 500;

_serialPort.WriteTimeout 500;

_serialPort.Open ;

_continue true;

readThread.Start ;

Console.Write Name: ;

name Console.ReadLine ;

Console.WriteLine Type QUIT to exit ;

while _continue

message Console.ReadLine ;

if stringComparer.Equals quit, message

_continue false;

else

_serialPort.WriteLine

String.Format : 1, name, message ;

readThread.Join ;

_serialPort.Close ;

public static void Read

try

string message _serialPort.ReadLine ;

Console.WriteLine message ;

catch TimeoutException