Matlab Code to Transmit Data Through Serial Port Serial communication is the simplest way to. Getting Started with Serial Port Communication. Disconnect and clean up â When you no longer need the serial port object, remove it from the MATLAB ® workspace. These settings are overridden by your MATLAB code and have no effect on your serial port application. If a property has a.
Working with the Serial Port Interface Understanding the Serial PortThe serial port interface is supported through a VISA-serialobject. The features associated with a VISA-serial object are similarto the features associated with a serial port object.
Therefore, onlyfunctions and properties that are unique to VISA's serial port interfaceare discussed in this section.Refer to to learn about writingand reading text and binary data, using events and callbacks, usingserial port control lines, and so on. NoteThe VISA-serial object does not support the serialbreak function,the BreakInterruptFcn property, and the PinStatusFcn property. Creating a VISA-Serial ObjectYou create a VISA-serial object with the function. Each VISA-serial objectis associated with an instrument connected to a serial port on yourcomputer.visa requires the vendor name and the resource name as input arguments. Thevendor name can be keysight (note thatagilent also still works), ni,rs, or tek.
The resource name consists ofthe name of the serial port connected to your instrument. You can find theVISA-serial resource name for a given instrument with the configuration toolprovided by your vendor, or with the function. (In placeof the resource name, you can use an alias as defined with your VISA vendorconfiguration tool.) As described in, you can alsoconfigure property values during object creation.Some vendors do not provide VISA serial support until you enablea port in their configuration tools. Before you create a VISA object,find the instrument in the appropriate vendor VISA explorer. Whenyou find the instrument configured, note the resource string and createthe object using that information. For example, to create a VISA-serialobject that is associated with the COM1 port, and that uses NationalInstruments ® VISA. VISA-Serial Object Using NI Adaptor: VISA-Serial-ASRL1Communication SettingsPort: ASRL1BaudRate: 9600Terminator: 'LF'Communication StateStatus: closedRecordStatus: offRead/Write StateTransferStatus: idleBytesAvailable: 0ValuesReceived: 0ValuesSent: 0 Configuring Communication SettingsBefore you can write or read data, both the VISA-serial objectand the instrument must have identical communication settings.
Configuringserial port communications involves specifying values for propertiesthat control the baud rate and the. These properties are given below. Property NameDescriptionSpecify the rate at which bits are transmitted.Specify the number of data bits to transmit.Specify the type of parity checking.Specify the number of bits used to indicate the end ofa byte.Specify the character used to terminate commands writtento the instrument.Refer to your instrument documentation for an explanation ofits supported communication settings. Note that the valid values for StopBits are 1 and 2 andthe valid values for Terminator do not include CR/LF and LF/CR.These property values differ from the values supported for the serialport object.You can display the default communication property values forthe VISA-serial object vs created in.
Send data to Serial Port in MATLAB
tep=serial(âCOM1â, âBaudRateâ, 9600);
fopen(tep); fprintf(tep,âaâ); fclose(tep);
clc
clear all close all disp(â Welcome to TEP!!!â); disp(â â); disp(â www.TheEngineeringProjects.comâ); disp(â â); tep=serial(âCOM1â); % assign serial port object set(tep, âBaudRateâ, 9600); % set BaudRate to 9600 set(tep, âParityâ, ânoneâ); % set Parity Bit to None set(tep, âDataBitsâ, 8); % set DataBits to 8 set(tep, âStopBitâ, 1); % set StopBit to 1 %display the properties of serial port object in MATLAB Window disp(get(tep,{âTypeâ,âNameâ,âPortâ,âBaudRateâ,âParityâ,âDataBitsâ,âStopBitsâ})); fopen(tep); % Open Serial Port Object fprintf(tep,âaâ); %Print character âaâ to the serial port disp(âCharater sent to Serial Port is âaâ.â); fclose(tep); %Close Serial Port Object
clc
clear all close all disp(â Welcome to TEP!!!â); disp(â â); disp(â www.TheEngineeringProjects.comâ); disp(â â); tep=serial(âCOM1â); % assign serial port object set(tep, âBaudRateâ, 9600); % set BaudRate to 9600 set(tep, âParityâ, ânoneâ); % set Parity Bit to None set(tep, âDataBitsâ, 8); % set DataBits to 8 set(tep, âStopBitâ, 1); % set StopBit to 1 %display the properties of serial port object in MATLAB Window disp(get(tep,{âTypeâ,âNameâ,âPortâ,âBaudRateâ,âParityâ,âDataBitsâ,âStopBitsâ})); fopen(tep); % Open Serial Port Object data = input(âEnter character: â, âsâ); %Ask user to Enter character fprintf(tep,data); %Print character âaâ to the serial port disp(âCharater sent to Serial Port is:â); disp(data); fclose(tep); %Close Serial Port Object
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