Read data from the COM2 port of the computer and save the data in the TXT file for data analysis. The following is the M script:
%Name: Matlab serial port-Lab1
% Description: Serial port read and written to txt file
s=serial('com2');
s.BytesAvailableFcnMode='byte';% serial port settings
s.InputBufferSize=4096;
s.OutputBufferSize=1024;
s.BytesAvailableFcnCount=100;
s.ReadAsyncMode='conTInuous';
s.Terminator='CR';
Fopen(s);%open serial port
Out=fread(s,10,'uint8');% reads 10 characters at a time
Fprintf('%3c', out);% one character for three-bit output, %c character, %d integer
Fid=fopen('serial_data.txt','w+');%'a+' read-write mode is turned on, pointing the file pointer to the end of the file. If the file does not exist, try to create it
Fprintf(fid, '%3c', out); % is written to the file
Fclose(fid);
Fclose(s);
Delete(s);
2, experiment 2: the same function, write a more standardized with the function, the code is as follows:% open serial port
funcTIonscom=OpenSerial(sname,HReadFcn)
Scom=serial(sname);
scom.BytesAvailableFcnMode='terminator';
scom.Terminator='. ';
scom.BytesAvailableFcn=HReadFcn;
Try
Fopen(scom);
Catcher
Fprintf('%s failed to open.', sname);
End
Fprintf ('%s successfully opened.', sname);
End
% write serial port
funcTIonWriteSerial(scom,str)
Fprintf(scom,str,'async');% asynchronous mode
End
% read serial callback function
funcTIonReadFcn_Com2(obj,~)
n=get(obj, 'BytesAvailable');
Ifn
a=fread(obj,n,'uchar');
c=char(a');
Fprintf('%s',c);
End
End
% close the serial port
functionCloseSerial(scom)
Try
Fclose(scom);
Catcher
Fprintf('%s shutdown failed.', scom.Name);
Return
End
Delete(scom);
End
The simulation is as follows, use the virtual serial port to connect to serial ports 2 and 3, open the serial port debugging assistant, open com3 by default
In the matlab command box, enter the command as follows to open the serial port com2.
》â€scom=OpenSerial('com2',@ReadFcn_Com2);
Com2 opened successfully.
Write to com2
》》WriteSerial(scom,'Hello!');
A 24V Dc Motor Consistency is good, reliable performance, low malfunction, torque, motor no-load and load running more smoothly and the lowest in 50 decibels
Functions: 24V dc motor rotor part of the armature iron core, armature, commutator and other devices, 24V dc motor is suitable for most of the electronic products, such as Electric curtains, car, sweeping robot, no hakaze fan, etc
Areas of application:
Method of use: the best stable in horizontal plane, installed on the 24V dc motor output shaft parts, cannot use a hammer to knock, knock prone to press into the 24V dc motor drive, may cause damage to internal components, and cannot be used in the case of blocked.
Operating temperature range:
24V dc motor should be used at a temperature of -10~60℃.
The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
If a 24V dc motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.
Storage temperature range:
24V dc motor should be stored ta a temperature of -15~65℃.
In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.
Service life:
The longevity of geared motors is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.
â—Use with a load that exceeds the rated torque
â—Frequent starting
â—Momentary reversals of turning direction
â—Impact loads
â—Long-term continuous operation
â—Forced turning using the output shaft
â—Use in which the permitted overhang load or the permitted thrust load is exceeded
â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
â—Use of a voltage that is nonstandard as regards the rated voltage
â—Use outside the prescribed temperature or relative-humidity range,or in a special environment.
â—Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.
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