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[quote="cak kalim"]Ive just try the tutorial on http://mytutorialcafe.com/Microcontroller%20Application%20Motor%20Stepper.htm I try to drive the motor using P0, but never work. When I attach led tester on P0 it works fine (the led rotate like the source code) Then I try to change it to P1 and works fine. Anyone know why?[/quote]
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Basic Microcontroller
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Topic review
<table border="0" cellpadding="3" cellspacing="1" width="100%" class="forumline"> <tr> <th class="thCornerL" width="22%" height="26">Author</th> <th class="thCornerR">Message</th> </tr> <tr> <td width="22%" align="left" valign="top" class="row1"><span class="name"><a name=""></a><b>cak kalim</b></span></td> <td class="row1" height="28" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><img src="../../forum/templates/subSilver/images/icon_minipost.gif" width="12" height="9" alt="Post" title="Post" border="0"/><span class="postdetails">Posted: Tue May 09, 2006 2:10 am<span class="gen"> </span> Post subject: </span></td> </tr> <tr> <td colspan="2"><hr/></td> </tr> <tr> <td colspan="2"><span class="postbody">Thanks for the tips. Yesterday I tried it and works. Now I add pull up resistor for other ports.</span></td> </tr> </table></td> </tr> <tr> <td colspan="2" height="1" class="spaceRow"><img src="../../forum/templates/subSilver/images/spacer.gif" alt="" width="1" height="1"/></td> </tr> <tr> <td width="22%" align="left" valign="top" class="row2"><span class="name"><a name=""></a><b>myturf</b></span></td> <td class="row2" height="28" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><img src="../../forum/templates/subSilver/images/icon_minipost.gif" width="12" height="9" alt="Post" title="Post" border="0"/><span class="postdetails">Posted: Fri May 05, 2006 4:39 am<span class="gen"> </span> Post subject: re: motor stepper</span></td> </tr> <tr> <td colspan="2"><hr/></td> </tr> <tr> <td colspan="2"><span class="postbody">In my opinion these port doesn't have pull up resistor, you may use this port if you put resistor up ( 10k) to Vcc, and don't forget to add diode betwen emitor and Vcc. <br/> <br/>I hope this answer can help you.</span></td> </tr> </table></td> </tr> <tr> <td colspan="2" height="1" class="spaceRow"><img src="../../forum/templates/subSilver/images/spacer.gif" alt="" width="1" height="1"/></td> </tr> <tr> <td width="22%" align="left" valign="top" class="row1"><span class="name"><a name=""></a><b>cak kalim</b></span></td> <td class="row1" height="28" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><img src="../../forum/templates/subSilver/images/icon_minipost.gif" width="12" height="9" alt="Post" title="Post" border="0"/><span class="postdetails">Posted: Fri May 05, 2006 12:47 am<span class="gen"> </span> Post subject: Can't drive stepper motor on P0 AT89S51</span></td> </tr> <tr> <td colspan="2"><hr/></td> </tr> <tr> <td colspan="2"><span class="postbody">Ive just try the tutorial on <a href="../../MicrocontrollerApplicationMotorStepper/" target="_blank">http://mytutorialcafe.com/Microcontroller%20Application%20Motor%20Stepper.htm</a> <br/>I try to drive the motor using P0, but never work. <br/>When I attach led tester on P0 it works fine (the led rotate like the source code) <br/> <br/>Then I try to change it to P1 and works fine. <br/> <br/>Anyone know why?</span></td> </tr> </table></td> </tr> <tr> <td colspan="2" height="1" class="spaceRow"><img src="../../forum/templates/subSilver/images/spacer.gif" alt="" width="1" height="1"/></td> </tr> </table>
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