RES: RES: Who is RobertF?

Mon Nov 24 15:52:30 UTC 2008

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 funding), either after finding out it's unsuitable or outdated due to 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
>
> ------------------------------------------------------------------------
>
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>  
>
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-- 
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