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???
08/18/09 03:46
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#168375 - It's all about initial hardware cost, not maintenance cost.
Responding to: ???'s previous message
Neil Kurzman said:
If a given Programmer can Learn ASM or C at the same Speed. And Said programmer can Write code at the same rate.
Then why would do so many Companies and Programmers choose 'C'.
Because The Avg C programmer can write more code per day then The Avg ASM Programmer can. Slower code maybe. Bigger Code Maybe. But that is the trade off. And Engineering is all about the trade offs.
A single line of C may be a dozen or more lines of ASM. It is why they wrote C in the first place (Probably in ASM)

'C' was developed in an environment wherein it was already known that it would be around for a long time, and in an age when software products lived a long time. Today's products' lives are measured in minutes, and not in decades. Maintenance isn't the issue it once was because the "next revision" will probably not only use a different MCU, but probably be built by a different team under different management. Today's developers don't plan to develop a product then build a company around it. They develop a business with the plan to sell it once their product begins to sell and show a profit. That's why cost is the big issue, and managers don't care about documentation. That's why it matters whether the object code is 16383 bytes in size or 16385. That's why it's important that the job will run on the 12 MHz part that's 30 cents cheaper than the 24 MHz part. The code, they only pay for once. The hardware is paid for with each product that's shipped. If they're look like they have "blue sky," then their product has to sell plenty at low manufacturing cost and high retail.

RE








List of 131 messages in thread
TopicAuthorDate
Article: "Real engineers program in C"            01/01/70 00:00      
   C and Latin            01/01/70 00:00      
      similarities between English and C            01/01/70 00:00      
         all sorts of similarities            01/01/70 00:00      
      NOT engineers.....            01/01/70 00:00      
         I think that was his point?            01/01/70 00:00      
            I know            01/01/70 00:00      
               I also don't know if his diagram on Page 3 is right            01/01/70 00:00      
   fewer ASM developers            01/01/70 00:00      
   languages            01/01/70 00:00      
   Muscle Vs Fat            01/01/70 00:00      
      apples vs bears            01/01/70 00:00      
         Wait a minute, pilgrim!            01/01/70 00:00      
            pilgrim has arrived            01/01/70 00:00      
            Break out that DOS Computer            01/01/70 00:00      
               I do that quite often!            01/01/70 00:00      
            blame drivers            01/01/70 00:00      
               Equip them right and they seem to work ... sort-of            01/01/70 00:00      
                  Engineers and Marketing guys            01/01/70 00:00      
            jeeziz x kryst            01/01/70 00:00      
               So ... Why do you do all that?            01/01/70 00:00      
                  wrong choice of word            01/01/70 00:00      
                     It's just a millstone ...            01/01/70 00:00      
                  re: why?            01/01/70 00:00      
      My computer _boots_ faster than that.            01/01/70 00:00      
         DMA?            01/01/70 00:00      
      Maybe it's the amount of memory            01/01/70 00:00      
         The cost of mutlitasking..            01/01/70 00:00      
         haven't any time to waste            01/01/70 00:00      
            That would be too slow!            01/01/70 00:00      
               I see no ships!            01/01/70 00:00      
               Isn't 4k plenty for a '51?            01/01/70 00:00      
                  which '51 does have that?            01/01/70 00:00      
                     Erik would call those "deviates".            01/01/70 00:00      
                        nope            01/01/70 00:00      
                        pipelines, cars, and real engineers            01/01/70 00:00      
                           It's also pipelined.            01/01/70 00:00      
                              then it's irrelevant            01/01/70 00:00      
                  If you can ignore those features            01/01/70 00:00      
               keeping up            01/01/70 00:00      
                  I feel your pain ...            01/01/70 00:00      
                     Don't see problems - see possibilities            01/01/70 00:00      
                        Do you really want to hide from reality?            01/01/70 00:00      
                           Always hiding behind excuses            01/01/70 00:00      
                              What excuses?            01/01/70 00:00      
                                 Your excuses            01/01/70 00:00      
                                    Do you directly or indirectly work for Keil?            01/01/70 00:00      
                                       BULL!!            01/01/70 00:00      
                                          I don't harbor any animosity, but I don't like being lied-to            01/01/70 00:00      
                                             you "understand well enough"            01/01/70 00:00      
                                                I have to agree ... evaluation takes time ...            01/01/70 00:00      
                                                   this is where I think I'm the realist            01/01/70 00:00      
                                                      If only the pieces were separately available ...            01/01/70 00:00      
                                                         I can't and would never            01/01/70 00:00      
                                                            So ... Who's a simulator specialist?            01/01/70 00:00      
                                                               don't know, don't care            01/01/70 00:00      
                                                                  So why even mention it?            01/01/70 00:00      
                                                                     because someone (you?) brought it up            01/01/70 00:00      
                                       Tangential Richard at work            01/01/70 00:00      
                           the pot calling the kettle black            01/01/70 00:00      
                     that's the crux            01/01/70 00:00      
                        It's a matter of realism            01/01/70 00:00      
                           well, if you do not have the time to evaluate, your points            01/01/70 00:00      
                              I have to disagree ...            01/01/70 00:00      
                                 no need            01/01/70 00:00      
                                    That would be an ideal fix!            01/01/70 00:00      
                  no way            01/01/70 00:00      
                     but only if we both define a project            01/01/70 00:00      
                        oh, that's no proof then...            01/01/70 00:00      
                           It would be a nice idea, but how would you time it?            01/01/70 00:00      
                           you did not read what I said            01/01/70 00:00      
                              implication and how to challenge it            01/01/70 00:00      
                                 disassembly            01/01/70 00:00      
                                    Encryption module?            01/01/70 00:00      
                                    not at all            01/01/70 00:00      
                                       It's clear to see that some folks really like 'C'            01/01/70 00:00      
                                          can you only like one thing?            01/01/70 00:00      
                                             Yes, but ...            01/01/70 00:00      
                                                you can boil steak too            01/01/70 00:00      
                                                   but you don't have to do that            01/01/70 00:00      
                                                      but you just said            01/01/70 00:00      
                                       no praise, just not hate            01/01/70 00:00      
                                          That makes sense            01/01/70 00:00      
                                          not that claim            01/01/70 00:00      
                                             again you miss 'usually', 'mostly', 'often', etc            01/01/70 00:00      
                                                Not so ... exactly            01/01/70 00:00      
                                                   Based on what experience?            01/01/70 00:00      
                                                      That's not how it works            01/01/70 00:00      
                                                         maintenance is a totally different issue            01/01/70 00:00      
                                                         apples to pears?            01/01/70 00:00      
                                                            I don't need to compare/contrast apples and pears            01/01/70 00:00      
                                                               The embedded world is larger than your tiny island            01/01/70 00:00      
                                                   IF            01/01/70 00:00      
                                                      It's all about initial hardware cost, not maintenance cost.            01/01/70 00:00      
                                                         Value of investment            01/01/70 00:00      
                                                         Not Here            01/01/70 00:00      
                                                         Whose business?            01/01/70 00:00      
                                                            What do you mean by "code analysis tools"?            01/01/70 00:00      
                                                               Some important tests            01/01/70 00:00      
                                                                  Yes, those come up in HLL, but ...            01/01/70 00:00      
                                                                     Memory leaks nothing to do with HLL            01/01/70 00:00      
                                                                        Yeah, you can do that ... but it's not recommended            01/01/70 00:00      
                                                                           More way than one to create memory leaks            01/01/70 00:00      
                                                                           that is not applicable to small embedded            01/01/70 00:00      
                                                                     Way easier to analyse non-goto code            01/01/70 00:00      
                                                                        and why would that be?            01/01/70 00:00      
                                                                           General purpose languages normally allows dangers            01/01/70 00:00      
                                                                              You still don't get the point, Per            01/01/70 00:00      
                                                                                 Wrong question            01/01/70 00:00      
                                                                                    what view?            01/01/70 00:00      
                                                                                       and the answer is            01/01/70 00:00      
                                                                                       can be seen as a leading question            01/01/70 00:00      
                                                                        Careful now! Some folks like Pascal for the '51            01/01/70 00:00      
                                                                           Why?            01/01/70 00:00      
                                                                        Some things depend on your point of view            01/01/70 00:00      
                                                                           Richard has never, ever, in his whole life implemented a bug            01/01/70 00:00      
                                                                              I may have written 'em, but I've never shipped 'em            01/01/70 00:00      
                                                               QAC and Polyspace            01/01/70 00:00      
                                                                  thanks, Oliver            01/01/70 00:00      
                                                                     MISRA and assembly don't mix well.            01/01/70 00:00      
                                                                        you can write FORTRAN in any language            01/01/70 00:00      
                                                                           I know ... but MISRA rules are explicit.            01/01/70 00:00      
                                                                              Not happy will all parts of MISRA            01/01/70 00:00      
                                                                                 Interesting discussion of MISRA C:            01/01/70 00:00      
                                                                                 Flawed but useful            01/01/70 00:00      
                                                                              Nested comments can produce different results            01/01/70 00:00      
                                                                           That's the thing with rules            01/01/70 00:00      
                                                                     Polyspace            01/01/70 00:00      
            Also in VB            01/01/70 00:00      
               Amazing!            01/01/70 00:00      
   You really are very naughty Andy            01/01/70 00:00      

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