[rtl] Using floating point arithmetics with rtlinux 2.0
Hi all, I'm using rtlinux 2.0 in an industrial project since a long time, without any problems. ( See the rtlinux Homepage, Real world Applications, engraving machine ecograv :-) I have the following hardware equipement: AMD 586 DX 133 MHz 32 MB RAM Realtek PCI Ethernet on board ELAN SBC-411/E board No Graphics And the following problem: I extended my programm with some floating point arithmetics. Really very simple things, just four multiplications. Most the time it works fine. The runtime of my task is about 300 us. Sometimes, the runtime increases to more than 500 us and that is too much for my application because I must satisfy some timing conditions. I did some debugging with an Oszilloscope connected to a port pin of the printer port and I can see, that my floating point calculation takes sometimes a longer time. But the executed code is the same. This problem occurs one or two times an hour or less :-( 1) Is it possible, that I can' t get access to the FPU unit from rt_process ? I do a lot of floating point arithmetic in Linuxland. 2) Is it possible, that a PCI Network card can cause problems like this ? I have a lot of traffic on the Network in Linuxland. Thanx in advance, Michael Kabot -- [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/rtlinux/
Re: [rtl] rt_com problem
} Hi, } I want to insert the rt_com.o in the kernel,so I do as following: } } setserial /dev/ttyS0 uart none } insmod rt_com com1=0x3f8,4 } } then it display that: } } rt_com.o : unresulved symbol rtl_register_rtldev } rt_com.o : unresulved symbol rtl_unregister_rtldev } } any advice is appreciated. } Thank advanced! Be sure to insmod rtl_posixio.o first. -- [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/rtlinux/
Re: [rtl] SBC 8260
} Has anybody used SBC 8260 from EST (Now Wind River). I want to try it but need to know if anyone has tried this board earlier. We haven't tested/don't run on the 8260 yet. In fact, Linux/PPC 2.4 isn't completely there yet. -- [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/rtlinux/
[rtl] serial card drivers
Hi all, I am developing a CNC(Computer Numerical Control) system basing on rt-linux 2.2, and I am preparing to use some RS-232 serial card like moxa 104. I know there is linux device driver for serial card, but does it work in rt-linux?(to be honest,I know little about drivers) I want to do some output in rt threads,do I need a rt-driver for the serial card? If I do, how can I get it, and how to use it? I really hope to get your advise. Thanks for your help, and merry christmas to all. A.Han 2000.12.21 === ΪÄã¶ø½¨£¬ÎªÄã¶øÉ裬ÈÃÄã´«µÝÕæÐÄÕæÒâ 163.netºØ¿¨Õ¾£¨http://ecard.163.net£© 163µç×ÓÓʾÖȫзîÏ×£¬¾«²ÊÎÞÏ޵ĵç×Ӻؿ¨Õ¾¡£ === -- [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/rtlinux/
Re: [rtl] SBC 8260
On Wed, Dec 20, 2000 at 08:49:03AM -0800, Rafeeq Ur Rehman wrote: Has anybody used SBC 8260 from EST (Now Wind River). I want to try it but need to know if anyone has tried this board earlier. I've been porting Linux and RTAI to the Motorola 8260 ADS board, and both run fine. Recent versions of Linux have run on the SBC 8260 board, but few-days-old versions have had a little bit of brokenness. Once this is fixed (I have patches), both Linux and RTAI should run on the EST SBC 8260 board, as well. If you already have Linux running on the board, tell me the version of the kernel that you are using, and I'll send you a patch for RTAI. Then, you can build RTAI out of CVS, and we'll see what happens. dave... -- [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/rtlinux/
Re: [rtl] serial card drivers
On Thu, Dec 21, 2000 at 10:00:56PM +0800, A.Han wrote: Hi all, I am developing a CNC(Computer Numerical Control) system basing on rt-linux 2.2, and I am preparing to use some RS-232 serial card like moxa 104. I know there is linux device driver for serial card, but does it work in rt-linux?(to be honest,I know little about drivers) I want to do some output in rt threads,do I need a rt-driver for the serial card? If I do, how can I get it, and how to use it? I really hope to get your advise. Thanks for your help, and merry christmas to all. There is no real-time driver for the moxa 104 that anyone has announced. You have two choices a) port the moxa 104 driver to real-time or have someone else port it, or b) use one of the multiport boards based on standard PC UARTs (8250, 16450, 16550, etc.). It's been a few years since I've used multi-port serial boards, so I can't recommend one off-hand. dave... -- [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/rtlinux/
