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Questions about interfacing Matlab with AT89S51 (Assembly)

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ZaeemAhmad

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I want to interface MATLAB (GUI) with AT89S51 uC to control the direction and angle of a bi-polar stepper motor. How should I proceed? The questions that I have in my mind include:
1. Can I send the no. of steps first in one byte of data, then another byte of data containing the direction data (CW or CCW)? How can I do this?
2. How should I write the assembly code so it receives these two bytes of data and stores them in separate registers?
 

Re: Matlab & AT89S51

Use parallel port /serial port for interface with ur pc
1. Yes u can do this
2.configure 8051 as input , mov receved value to acc. , input nxt value compare for cw,ccw direction
 

Re: Matlab & AT89S51

I have written some code in Matlab GUI for a button which is to be pressed after the input of angle and selection of a radio button corresponding to either clockwise or anti-clockwise direction:

function move_it_Callback(hObject, eventdata, handles)

ccw_selected = get (handles.ccw, 'Value');
cw_selected = get (handles.cw, 'Value');
angle = str2num (get (handles.angle_value, 'String'));
steps = angle / 15;
port = serial ('COM1', 'BaudRate', 9600);
fopen (port)
fwrite (port, steps);
fclose (port);
guidata(hObject, handles);


Will this work? What changes should be done, if required...?
 

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