> > > least 12 bits and PCI bus and RTLinux drivers available. > > > > 40Ksamp in 40Ksamp out or 40 per chanel or 40 total throughput ? > > 40 per channel > > > > > > > > > I am thinking of NI PCI-MIO-16E-4 but in the comedi page driver status > > for this > > > card is set to:mainly limited by comedi infrastructure. I don't know > > exactly > > > what this means but I am afraid of buying the card and then find out > > that it > > > won't work. Has someone used this doard in RTLinux or some other with > > the above > > > > If you need 2AD and 2DA at 12bit a number of cards can do that - > > If it can do the sample rate you need depends on the platform you > > use but 100Ksamp will be close to the limit of an X86 based > > system in any case, unless you let it sample autonomously and then > > just > > pick up the FIFO content periodically (or interrupt driven) > > I supose that the 100ksamp limit will be in the total in/out throughput. Lets > say I need 2 ins and 2 outs working simultaneously in one pc. Does this limit > mean that I won't be able to work faster than 25 ksamp/s per channel?
depends on the card if you can write to two chanels and read from two chanels simply by doing two consecutive inb/outb sequences you should be able to get it to 50Ksamps/s but if you need to set the chanels or the sampling is at different frequences for each chanel thus in different rt-threads then I don't think a UP X86 will do that for you - also assuming that the 2chanel in 2chanel out means you are running some sort of control code that actually needs some CPU time aswell you are at the limit of an off the shelve X86 PC. If its one thread that does read_2AD->do_very_littl->write_2DA and the read and write is fast enough then you might get up to the 4KHz. > if you are > > looking for ADQ drivers check > > > > ftp://ftp.fsmlabs.at/pub/rtlinux/contrib/peterw/ > > I can't download the rtdaq.tar.bz2 file. Mozilla tels me that it can't find it. hmm... pleas use ftp and let me know if that works for you - there are a number of downloads every day so there should realy be no problem. hofrat -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] -- For more information on Real-Time Linux see: http://www.rtlinux.org/
