It get listed in /dev but probably as /dev/ttyUSBx. It should also be possible to access it by serial number or similar so that it does not move.
On Sat, 6 Aug 2016 09:24:22 -0400 Gene Heskett <[email protected]> wrote: > Greetings everybody; > > 2 question that I assume are two separate problems. > > 1. How is the detected usb port when these things are plugged in, linked > to become available to hal? > > 2. This "fake" vfd I have, is there a way to query it and determine if we > have a driver for it, or will I have to write a .comp file for it. I do > have the definitions of both the 13 byte packets sent by the inverter, > and the 9 byte command strings to be sent to it. > > It appears that control by both paths is possible at the same time, so > one could drive it with a run/stop line, a direction line, and a pwmgen > output buffered by a cmos stage running on 5.0 volts directly into those > 3 terminals. However, from the looks of the command strings > definitions, it looks as if anything one can do from its panel buttons, > can also be done by the command sent. There is also a rather extensive > error checking in each string along with a much better than a single bit > synch sequence. The inverter sends data actively, so no need to query > it, and apparently receives commands asynchronously, eg anytime sent. > > So, the first thing I assume is to plug in one of these usb-485 > converters, and hook it to the + and - terminals on the inverter and > make data flow. I am assuming its an hid type device. I'll take a data > cable out and do that plugin bit & see what dmesg says at some point > today and relate what I see. > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Genes Web page <http://geneslinuxbox.net:6309/gene> > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
