On Fri, 19 Aug 2011, Viesturs L?cis wrote: > Date: Fri, 19 Aug 2011 10:17:35 +0300 > From: "[UTF-8] Viesturs L?cis" <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: Re: [Emc-users] Mesa 7i43 fpga internal input pull ups - could sb > synthesise another firmware for the 7i43 with pull downs for GPIO pins > please ? > > Hello, gentlemen! > > I have very similar problem to Maximilian's. > I have 2 relays, that are "active high". 7i43's outputs are "active low". > Those relays open high pressure valve and also abrasive valve in > waterjet machine. > > Can anyone suggest me some kind of simple hardware signal invertor?
Are these mechanical relays or solid state relays? For 3-5V solid state relays, connect relay+ to 7I43 +5, Relay- to 7I43 output. Then set the is_output, output_invert and is_opendrain parameters for the relay drive pin. For mechanical relays you need an external driver like the 7I37 which will also isolate the 7I43 from the field power (that powers the relay) > > Viesturs > > 2011/8/19 andy pugh <[email protected]>: >> On 18 August 2011 19:07, Maximilian H <[email protected]> wrote: >> >>> What is the procedure for synthesising my own firmware for the 7i43 ? >> >> There are some details here: >> >> http://git.linuxcnc.org/gitweb?p=hostmot2-firmware.git;a=blob;f=README;h=fb7a6d4beb756cb4c21b866c7a87d88cf7b4124a;hb=71bf0a427b77376291f4ddf638f1ce4ca83cd7a7 >> >> -- >> atp >> "Torque wrenches are for the obedience of fools and the guidance of wise men" >> >> ------------------------------------------------------------------------------ >> Get a FREE DOWNLOAD! and learn more about uberSVN rich system, >> user administration capabilities and model configuration. Take >> the hassle out of deploying and managing Subversion and the >> tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > ------------------------------------------------------------------------------ > Get a FREE DOWNLOAD! and learn more about uberSVN rich system, > user administration capabilities and model configuration. Take > the hassle out of deploying and managing Subversion and the > tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
