Matlab Solenoid Example Program

Cut and paste this example program in to a blank m-file in Matlab, then save it on your engin website with the name of your group and instrument (remember, Matlab allows only alphanumeric characters and no spaces before the ".m"). Modify the program (including the commented upper section) to fit with your hardware.

% program solenoid.m

% opens the COM1 serial port and sends a series of commands to a stepper

% motor at location S2 on a Pontech S200B controller board

% written 27 October 2005 by E. Carr Everbach

clear % clear all previous variables

ncount = 1;

ser = serial('COM1');   % establish connection between Matlab and COM1

set(ser, 'Terminator', 'CR'); % set communication string to end on ASCII 13

set(ser, 'BaudRate', 9600);

set(ser, 'StopBits', 1);    % Pontech controllers ask for these parameters

set(ser, 'DataBits', 8);

set(ser, 'Parity', 'none');

fopen(ser); % open the serial port connection

fprintf(ser,'BD0\n'); % address the controller board (assume only one of them)

fprintf('servo controller is on-line.\n');

nsolenoids = input('Enter number of solenoids to test: ');

for index = 1:nsolenoids

    fprintf(ser,'SV%d M0\n', index); % write out initialization commands

end

while (ncount)

    ncount = input('Enter number of in/out pulses to each solenoid (0 to quit): ');

    for index = 1:ncount

        for yndex = 1:nsolenoids % for each solenoid

            fprintf(ser,'PS%d\n', yndex);

            pause(0.2);

            fprintf(ser,'PC%d\n', yndex);

            pause(0.5)

        end

    end

end

disp('End of program');

fclose(ser);

Matlab Servo Example Program

Cut and paste this example program in to a blank m-file in Matlab, then save it on your engin website with the name of your group and instrument (remember, Matlab allows only alphanumeric characters and no spaces before the ".m"). Modify the program (including the commented upper section) to fit with your hardware.

% program servo.m

% opens the COM1 serial port and sends a series of commands to a servo

% motor at location S1 on a Pontech S200B controller board

% written 3 October 2005 by E. Carr Everbach

clear % clear all previous variables

ser = serial('COM1');   % establish connection between Matlab and COM1

set(ser, 'Terminator', 'CR'); % set communication string to end on ASCII 13

set(ser, 'BaudRate', 9600);

set(ser, 'StopBits', 1);    % Pontech controllers ask for these parameters

set(ser, 'DataBits', 8);

set(ser, 'Parity', 'none');

fopen(ser); % open the serial port connection

fprintf(ser,'BD0 SV1\n'); % write out initialization commands

fprintf('servo controller is on-line.\n');

fprintf('Hit space to see servo toggle through its range\n');

pause

fprintf('M255\n');

fprintf(ser,'M255\n');

pause(1)

fprintf('M1\n');

fprintf(ser,'M1\n');

pause(1)

position = 1; % variable to hold angular position info

while (position)

    position = input('Enter integer position (1-255) or 0 to quit: ');

    fprintf(ser,'M%d\n',position);

    fprintf('M%d\n',position);

end

disp('End of program; servo off');

fclose(ser);

For more information about communicating in Matlab with data acquisition devices, serial ports, etc., visit http://www.swarthmore.edu/NatSci/ceverba1/Class/MatlabDAQprocs.html