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vrf GPIB and serial port activity

Question asked by VRFuser on Jul 27, 2004
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META content="MSHTML 6.00.2800.1106" name=GENERATOR></HEAD><BODY><DIV><FONT face=Arial size=2></FONT> </DIV><DIV><SPAN class=994041607-28072004><FONT face=Arial size=2>Hello all,</FONT></SPAN></DIV><DIV><SPAN class=994041607-28072004><FONT face=Arial size=2></FONT></SPAN> </DIV><DIV><SPAN class=994041607-28072004><FONT face=Arial size=2>I run a VEE program here that is creating a PWM signal on 2 of the steeringpins of the parallel port (RS232 exit), independant from each other. Works perfect. However: when I use a HP data aquisition unit via GPIB at the same time in the same program, the RS232 port stops its activity for a short moment, while using the GPIB for the aquisition unit. Is there some setting somewhere where you can let the RS232 signal continue during GPIB activity? Even at a mouse-click, the PWM signal stops for a fraction, as shown on a scope. SOmehow the PWM generation I made is dependant on other processes in the computer. I made the PWM signal by setting the output pin high, used a certain delay, setting the pin low, and then the rest of the frequency time in a delay.</FONT></SPAN></DIV><DIV><SPAN class=994041607-28072004><FONT face=Arial size=2></FONT></SPAN> </DIV><DIV><SPAN class=994041607-28072004><FONT face=Arial size=2>Thanks!</FONT></SPAN></DIV><DIV><SPAN class=994041607-28072004><FONT face=Arial size=2></FONT></SPAN> </DIV><DIV><SPAN class=994041607-28072004><FONT face=Arial size=2>Mark Vervaart</FONT></SPAN></DIV>---<BR>You are currently subscribed to vrf as: rsb@soco.agilent.com<BR>To subscribe send a blank email to "join-vrf@it.lists.it.agilent.com".<BR>To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com".<BR>To send messages to this mailing list,  email "vrf@agilent.com".  <BR>If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com".</BODY></HTML>  

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