Jon Elson wrote: > Mario. wrote: >> I have the ultimate goal of reaching 2 milion quadrature output >> changes per second from any of the outputs, even 200 thousand per >> second is almost good for me. >> How does your method help me get to the intended goal? I'm talking >> about parallel port of course. >> >> > It will be totally impossible to make a motherboard parallel port output > 2 million changes per second.
Agreed. > > Even getting 200 KHz output with complex code is very unlikely. You > would need to set the interrupt frequency to 200 KHz = 50 us, 200KHz interrupts is a 5uS period, not 50uS. Not happening on any PC. I think Alex Joni once got the period down to about 6.5uS, just to see how far he could go. The machine was not very usable at that point. > You could set the interrupt frequency to 400 KHz or 25 us, 400KHz is 2.5uS, not 25uS. Even more impossible. Software generation in a PC at those rates is simply impossible. Hardware is the way to go. Regards, John Kasunich ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
