GigE NIC (Was: Who is RobertF?)

Tue Nov 25 09:04:13 UTC 2008

Hi Joel,

> Which GigE NIC is it?

Realtek RTL8111C is on the kit I'm interested most, and Intel 82574L is on 
other kits I'm also interested. I really wish they were supported in RTEMS.

As I mentioned before, for new hardware kits with this kind of gigabit ethernet cardsand without GPIO, it seems that serial port becomes the only supported bi-directional 
link that can be used to interact with external systems. I think that for most cases,
a RTOS must be able to retrieve information from external systems, and present 
processing result back to external systems, otherwise there is no need for such 
RTOS+Hardware. Due to limited capability of serial ports, coping with only serial 
communication is not a good situation. 

Thanks a lot,
Robert Fu> Date: Mon, 24 Nov 2008 09:52:30 -0600> From: joel.sherrill at oarcorp.com> To: wendell.silva at compsisnet.com.br> CC: robert.fu at live.com; rtems-users at rtems.org> Subject: Re: RES: RES: Who is RobertF?> > Wendell Pereira da Silva wrote:> >> > *De:* Robert Fu [mailto:robert.fu at live.com]> > *Enviada em:* sábado, 22 de novembro de 2008 17:19> > *Para:* Wendell Pereira da Silva> > *Cc:* rtems-users at rtems.org> > *Assunto:* RE: RES: Who is RobertF?> >> > > >> > Hi Wendell,> > > > Thanks a lot for your information about VMWare. It increases my > > confidence about VMWare.> > > >> Although they haven't spoke up, I know of another project that is doing all> development inside VMWare. This lets all team members have exactly> the same host environment. When there are tool upgrades, a new OS> image is released and everyone switches to it.> >> > In your short message, you actually mentioned something interested to > > me. Using Google translator, I briefly browsed COMPSIS website. With > > 19 years of history, I guess COMPSIS is a big company with a lot of > > resource and is involved in activities important to your country. I'm > > new to RTEMS, and have very limited resource: just some spare time > > outside working hours and limited personal funding, so I'll need a lot > > of help from RTEMS community on various RTEMS issues down the road.> >> > > >> > Not at all. J> >> >> > > > Limited available resource is one of the reasons I'm using VMWare now. > > In the past I abandoned some hardware (a waste to already limited > > funding), either after finding out it's unsuitable or outdated due to > > the limited time I can work on it. This time I hope using VMWare first > > can help me avoid some of such costs. For example, like you mentioned > > about 2 UARTs, since I already use one UART for remote debugging, I > > better select hardware kit with more than 2 UARTs (for sensor > > interface). Now with Eclipse plug-in and GDB working in my > > environment, I plan to shift focus to hardware part.> > > >> >> > Although RTEMS currently does not support the gigabit ethernet on the > > hardware kit that I have in mind, I'm still interested in how you made > > GDB server interface via TCP/IP work in RTEMS. To my understanding, > > RTEMS is a system with single process, and GDB server is another > > process, so how do you launch GDB server in RTEMS?> >> It runs as a thread. There is another way of doing things using CEXP > and dynamic loading> of your application. This ends up working a lot like people are used to > with VxWorks.> > Network drivers are often ported over from NetBSD or FreeBSD since the > RTEMS TCP/IP> stack is an old FreeBSD one. Till Straumann has mentioned having a > kit/procedure for> making this moderately painless.> > Which GigE NIC is it?> >> > Robert, what we did was a custom implementation of a GDB Server > > interface inside SIS (SPARC Instruction Simulator) through a TCP/IP > > socket. So the RTEMS program (running on the SIS) is not aware about > > this interface. RTEMS already has a glue code to implement the GDB > > interface for some targets, including i386, but not for SPARC processors.> >> > > > You also mentioned GPIO simulation with PC's parallel port. For the > > hardware kits I have in mind, some have 4-bit In/4-bit OUT GPIO, some > > don't. I checked Discrete Driver chapter in RTEMS BSP and Device > > Driver Development Guide. There are descriptions about the driver, but > > no concrete example code is given. Do you know where I can find such a > > concrete example? Also in c\src\lib\libbsp\i386\shared\comm\i386_io.h, > > there some macros like outp(port, val) and inp(port) calling assembly > > code directly. May such macros be used to access GPIO pins directly > > without using the discrete driver?> >> > > >> The RTEMS powerpc gdb has psim which can map UNIX shared memory into > simulated PowerPC> processor address space. When using this, you can do all IO into shared > memory and let a UNIX> process mirror IO in and out.> > --joel> >> > In the same way, we implemented the GPIO code inside SIS. That is, > > when the RTEMS program access the address of the GPIO registers it > > redirects such access to the PC’s parallel port mapped through VMWare.> > > > Thanks a lot for your help, and have a nice weekend!> >> > > >> > No problem.> >> > > > Robert Fu> >> > Wendell.> >> > > >> > ------------------------------------------------------------------------> >> >> > Subject: RES: Who is RobertF?> > Date: Fri, 21 Nov 2008 11:01:15 -0300> > From: wendell.silva at compsisnet.com.br> > To: robert.fu at live.com> > CC: rtems-users at rtems.org> >> > Hi Robert Fu,> >> > > >> > This is just to complement your information.> >> > Here, at COMPSIS (Brazil), our development environment includes VMWare > > 6.0 playing Fedora 7, RTEMS 4.8.0, Eclipse 3.3 CDT and a customized > > (home made) version of SIS (with GPIO emulation with the PC’s parallel > > port and a GDB Server interface via TCP/IP – which allow us to use > > both UARTs to run our protocols). Everything has worked very well > > since its implementation (6 month ago). VMWare have worked very well > > in Windows Vista 32 in our case. None of our problems (in the > > beginning) wasn’t regarding to the VMWare.> >> > > >> > Att.> >> > Wendell P. Silva.> >> > > >> > ------------------------------------------------------------------------> >> > *De:* rtems-users-bounces at rtems.org > > [mailto:rtems-users-bounces at rtems.org] *Em nome de *Robert Fu> > *Enviada em:* sexta-feira, 21 de novembro de 2008 04:33> > *Para:* daronchabot at gmail.com> > *Cc:* rtems-users at rtems.org> > *Assunto:* RE: Who is RobertF?> >> > > >> > Hi Daron,> > > > Thanks for clarify Option --enable-rdbg and --enable-rtems-debug.> > The RTEMS version I used is 4.9.0. I'm not sure if the problem has> > anything to do with VMWare, or some of my heap configurations> > were not right. I'll keep eye on it in the future.> > > > Thanks,> > Robert Fu> >> > > From: daronchabot at gmail.com> > > Subject: Re: Who is RobertF?> > > Date: Thu, 20 Nov 2008 07:10:53 -0600> > > To: robert.fu at live.com> > > CC: rtems-users at rtems.org> > >> > >> > > On 20-Nov-08, at 4:24 AM, Robert Fu wrote:> > >> > > > Hi Jeol,> > > >> > > > It's me. Last night I uploaded screen shots while writing/previewing> > > > "RTEMS Eclipse Plug-In" wiki page. Although some files were uploaded,> > > > error page (HTTP 500 Internal Server Error or Could not create> > > > directory)> > > > came up for almost every uploading, and later I could not access> > > > the wiki site.> > > >> > > > I developed an Eclipse plug-in for RTEMS (http://www.rtems.com/wiki/> > > > index.php/RTEMS_Eclipse_Plug-in).> > > > Please take a look. I'm new to RTEMS, and also new to Eclipse plug-in> > > > development. This is the 1st plug-in that I ever developed. So please> > > > be patient if you encounter problems while using it.> > >> > > Well done! Thanks for your contribution.> > >> > > However, as Sebastian pointed out the plugin is not accessible on the> > > FTP site. I'd really like to check out your work.> > >> > > >> > > >> > > > While working on the GDB part of the plug-in, I initially used --> > > > enable-rdbg in> > > > configure. Later I found --enable-rtems-debug was mentioned in a> > > > wiki page.> > > > When I used both --enable-rdbg and --enable-rtems-debug in> > > > configure, during startup> > > > my application hang at "_HAssert(_Heap_Is_prev_used> > > > ( next_block ));" in> > > > cpukit\score\src\heapsizeofuserarea.c. I went back to use --enable-> > > > rdbg. So my> > > > question is: which configure option should be used to enable remote> > > > debugging?> > >> > > Option --enable-rdbg is the one to use to enable remote debugging.> > >> > > Option --enable-rtems-debug activates some instrumentation within> > > RTEMS itself (malloc statistics at least...).> > >> > > I use both switches simultaneously and have not seen the problem you> > > reported. What version of RTEMS are you using ??> > >> > >> > > -- dc> > > _______________________________________________> > > rtems-users mailing list> > > rtems-users at rtems.com> > > http://rtems.rtems.org/mailman/listinfo/rtems-users> >> > ------------------------------------------------------------------------> >> > Get more done, have more fun, and stay more connected with Windows > > Mobile®. See how. <http://clk.atdmt.com/MRT/go/119642556/direct/01/>> >> > > >> > ------------------------------------------------------------------------> >> > Color coding for safety: Windows Live Hotmail alerts you to suspicious > > email. Sign up today. > > <http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_safety_112008%20>> >> > > -- > Joel Sherrill, Ph.D. Director of Research & Development> joel.sherrill at OARcorp.com On-Line Applications Research> Ask me about RTEMS: a free RTOS Huntsville AL 35805> Support Available (256) 722-9985> > 
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