Yishin, Interesting.
Are you able to get a position update back from the 7i43 every servo cycle or are you simply looping the position back inside the driver in the PC, which is probably just as well - after all this is a stepper system. Do you have, or did you have any latency issues using USB to control the 7i43 board? Using USB is convenient from a physical connection standpoint if you don't have any noise issues, but are there other reasons you wanted to use USB seeing that the 7i43 is available with a LPT port interface also? Regards, Dave On 2/3/2011 8:43 AM, Yi-Shin Li wrote: > On Thu, Feb 3, 2011 at 5:38 PM, Fox Mulder<quakem...@gmx.net> wrote: > > >> Am 03.02.2011 10:17, schrieb Steve Blackmore: >> >>> Mmmhh - I find the fact that it's USB based more interesting. >>> >>> http://www.intra2net.com/en/developer/libftdi/index.php >>> >> And i find it interesting that they doesn't list the FT232RL as >> supported device. They list the old FT232BM which needs much more >> external components compared to it's predecessor FT232RL. The RL also >> has more features and i/o pins to use and is little cheaper than the old >> BM version. :) >> >> Ciao, >> Rainer >> >> >> ------------------------------------------------------------------------------ >> Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! >> Finally, a world-class log management solution at an even better >> price-free! >> Download using promo code Free_Logger_4_Dev2Dev. Offer expires >> February 28th, so secure your free ArcSight Logger TODAY! >> http://p.sf.net/sfu/arcsight-sfd2d >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> > We use the USB/FPGA board, 7i43, from mesa electronics. It's USB chip is > FT245BM. We've defined a protocol, Wishbone Over USB, to access internal > registers inside FPGA through the USB link. Also, we've modified the libftdi > a bit for debugging purpose. The following are our git repositories: > > git://github.com/artek/libftdi-1.0.git > <https://github.com/artek/libftdi-1.0>git://github.com/artek/libwou.git > git://github.com/artek/emc2.git > > Best Regards, > Yishin Li > ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
