Is there a way to establish a GPIB connection using MATLAB without the instrument control Tool box? (I don't have it). Also is there a way for MATLAB to know what the external device's RS232 parameter values are ( Baud rate, stop bit etc..). For the RS232 connection I have the following code:

% This function is meant to send commands to Potentiostat Model 263A.

% A run includes turning the cell on, reading current for time t1, turning

% the cell off, waiting for time t2.

% t1 is the duration [secs] for which the Potentiostat must run (cell is on)

% t2 is the duration [secs] to on after off

% n is the number of runs

% port is the serial port name such as COM1

function [s] = Potentiostat_control(t1,t2,n)

port = input('type port name such as COM1', 's')

s = serial(port);

set(s,'BaudRate', 9600, 'DataBits', 8, 'Parity', 'even', 'StopBits', 2 ,'Terminator', 'CR/LF');

fopen(s)

%fprintf(s,'RS232?')

disp(['Total runs requested = ' num2str(n)])

disp('i denotes number of runs executed so far..');

for i=1:n

i

%data1 = query(s, '*IDN?')

fprintf(s,'%s','CELL 1'); % sends the command 'CELL 1'

%fprintf(s,'%s','READI');

pause(t1);

fprintf(s,'%s','CELL 0');

%fprintf(s,'%s','CLEAR');

pause(t2);

end

fclose(s)