A lot of my buddies use a 'C' compiler for the PIC chip! And this thing is really resource constrained! My most extreme project is using the Philips 83C751 chip. I believe, it had no XDATA ram, and only 2K of code available. It had a bunch of features in it, (mktg. wanted it this way). did the entire thing using the Keil 'C' compiler with some hand-tweaked assembly language thrown in. If you want low-power consumption, then in my opinion, the Texas Instruments MSP430 chip is king! Couple this thing with that Pumpkin OS, and a decent 'C' compiler, and you can really make that chip rip! Ken Wada --- In lpc2000@yahoogroups.com, Onestone <onestone@b...> wrote: > Of course it depends what you work on, I've been that path and come back > again (although a while ago now). The reason is simple. 99% of > everything I am currently working on has extreme size or power > consumption requirements, but often has a fair degree of computational > complexity. It would be real nice to bolt in an RTOS, and a few off the > shelf parts, patch it together with a little C and spit out a product. > The problem is I haven't yet found any combination that can do this fast > enough, or compactly enough for my needs. I do test the compilers and > other tools that come with development kits I buy, but haven't yet found > one that could do what I need. When I do I'll buy it. > > In the mean time my products create their own market niche. The market > for my two main products wouldn't exist if they were more expensive, > bigger, or ran for less time between charges. All unachievable with COTs > ttechniques. > > Al > > kennethwada wrote: > > > > > heh... > > > > I used to do that! In fact, I was a big proponent of always doing the > > 1st project with some 'XYZ-processor architecture' ENTIRELY in > > assembler. With technological life-cycles now measured in months I no > > longer have the luxury of doing this 'old-school' thing anymore. > > > > About the only thing I will do hard-core assembly on is the > > highly-tweaked DSP/signal processing using FPGA cores, or specialized > > DSPs anymore. Squeezing every extra MIPS is usually worth the hassle > > of the extra effort and obtuseness of highly-crafted assembler in this > > case. > > > > In fact, I used to pooh-pooh shrink-wrapped RTOS's! I was of the > > following camp..."I can write my own RTOS, why...I only need that > > infinite while(1) loop, and I am fine!". Now that I have spec'd in a > > bunch of these shrink-wrapped RTOS's, and written drivers, and a bunch > > of other stuff like this; I now find myself recommending > > shrink-wrapped RTOS's, file-systems and communications servers too! > > > > The trick to successful deployment of this off-the-shelf technology is > > to wrapper this stuff so most of the details are hidden to the > > applications developers. All the apps-developers need to know is how > > to write generic C/C++ code in a generic environment like DOS, Linux, > > or Windows! > > > > Ken Wada > > > > --- In lpc2000@yahoogroups.com, Onestone <onestone@b...> wrote: > > > Ah but the objective of learnig ARM ASM was to understand the fine > > > details of the instruction set to write my own optimised code, not > > to > > > use C, or somebody elses generic optimisation. > > > > > > Al > > > > > > kennethwada wrote: > > > > > > > > > > > The fastest way to use this is to do the following: > > > > - Write a small piece of Keil "C" code > > > > - Compile with the listing and Assemble source options checked > > > > - look at dissassembled code with the "Arm Architeture Reference > > > > Manual at your side" > > > > > > > > I did this, and managed to get some quality assembly language code > > up > > > > and operational in an hour or two! > > > > > > > > Most of my asm code is in the startup. With the Keil tools, there > > > > really is very little, or no need to write your own assembler. > > > > > > > > Ken Wada > > > > > > > > --- In lpc2000@yahoogroups.com, Onestone <onestone@b...> wrote: > > > > > And a lot of time. It's 811 pages long! few days read for a > > decent > > > > > novel, but a lifetime for a reference book! > > > > > > > > > > Al > > > > > > > > > > Ken Wada wrote: > > > > > > > > > > > RE:Learning ARM ASM > > > > > > > > > > > > Hello Chip; > > > > > > You need the "Arm Archtitecture Reference Manual" > > > > > > > > > > > > Ken Wada > > > > > > > > > > > > Yahoo! Groups Sponsor > > > > > > ADVERTISEMENT > > > > > > <http://us.ard.yahoo.com/SIG=129qe2qbj/M=298184.6191685. > > 7192823. > > > > 3001176/D=groups/S=1706554205: > > > > HM/EXP=1112112871/A=2593423/R=0/SIG=11el9gslf/*http://www. netflix. > > > > com/Default?mqso=60190075> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ---------------------------------------------------------------------- > > > > -- > > > > > > Yahoo! Groups Links > > > > > > > > > > > > * To visit your group on the web, go to: > > > > > > http://groups.yahoo.com/group/lpc2000/ > > > > > > > > > > > > * To unsubscribe from this group, send an email to: > > > > > > lpc2000-unsubscribe@yahoogroups.com > > > > > > <mailto:lpc2000-unsubscribe@yahoogroups.com? > > > > subject=Unsubscribe> > > > > > > > > > > > > * Your use of Yahoo! Groups is subject to the Yahoo! 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Groups Links > > > > > > > > * To visit your group on the web, go to: > > > > http://groups.yahoo.com/group/lpc2000/ > > > > > > > > * To unsubscribe from this group, send an email to: > > > > lpc2000-unsubscribe@yahoogroups.com > > > > <mailto:lpc2000-unsubscribe@yahoogroups.com? > > subject=Unsubscribe> > > > > > > > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > > > > Service <http://docs.yahoo.com/info/terms/>. > > > > > > > > > > > > > >--------------------------------------------------------------------- > > --- > > > > > > > >No virus found in this incoming message. > > > >Checked by AVG Anti-Virus. > > > >Version: 7.0.308 / Virus Database: 266.8.4 - Release Date: > > 27/03/2005 > > > > > > > > > > > > > > > > > > Yahoo! Groups Sponsor > > ADVERTISEMENT > > <http://us.ard.yahoo.com/SIG=1292ne6g0/M=298184.6018725.7038619. 3001176/D=groups/S=1706554205: HM/EXP=1112143341/A=2593423/R=0/SIG=11el9gslf/*http://www.netflix. com/Default?mqso=60190075> > > > > > > > > ---------------------------------------------------------------------- -- > > Yahoo! Groups Links > > > > * To visit your group on the web, go to: > > http://groups.yahoo.com/group/lpc2000/ > > > > * To unsubscribe from this group, send an email to: > > lpc2000-unsubscribe@yahoogroups.com > > <mailto:lpc2000-unsubscribe@yahoogroups.com? subject=Unsubscribe> > > > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > > Service <http://docs.yahoo.com/info/terms/>. > > > > > >--------------------------------------------------------------------- --- > > > >No virus found in this incoming message. > >Checked by AVG Anti-Virus. > >Version: 7.0.308 / Virus Database: 266.8.4 - Release Date: 27/03/2005 > > > >
Message
Re: Learning ARM ASM
2005-03-29 by Ken Wada