Why do you not hang them on USB ? Something like a FTDI breakout and then SPI .... if you can find working examples it's a nice solution, you dont gett the speed of the parport BUT for temperature there usually is some lag.
You could also run an 8 bit micro on a serial line :-D ..... it has AD's .... and DA's .... just a thought. / regards, Lars Segerlund. 2012/8/30 Charles Steinkuehler <[email protected]>: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Now I've got LinuxCNC (both RTAI and PREEMPT_RT) connected to my 3D > printer and moving around the X/Y/Z/A(E) axis, I need to get some > temperature control wired up. I would like to just hang a few ADCs > off of some parallel port pins programmed to function as an I2C bus. > > So...has anyone implemented a serial expansion protocol such as I2C or > SPI via the parallel port for LinuxCNC? > > It's pretty easy to bit-bang these protocols, but the code would have > to gracefully co-exist with software stepgen. Throughput wouldn't > really matter much, as the thermal time constants are pretty long so > even a few samples/s would probably enable a working PID loop. > > - -- > Charles Steinkuehler > [email protected] > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.11 (MingW32) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iEYEARECAAYFAlA+kxoACgkQLywbqEHdNFzE2ACfZjANxZ9pu3CalFbmqKxV6Den > 81cAoLsZCGf6JGn8PvVyzSyPwnOoEWsh > =oKWH > -----END PGP SIGNATURE----- > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
