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
