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Richard Erlacher
03/17/10 12:02
Read: 141 times
Denver, Co
USA


 		 #174238 - Where you sit determines what you see
Responding to: Andy Peters's previous message
Andy Peters said:
Richard Erlacher said:
Andy Peters said:
Then use an FPGA and design EXACTLY what YOU want.

Consider what that costs, Andy!


Spartan 3AN50 is about five bucks.

I dunno, it seems as if there's a ton of devices that communicate over SPI, which is a synchronous protocol and in many cases goes pretty damn fast.

Really? So where would you find an SPI USRT that can process HDLC?


Ya know, I haven't dealt with obsolete serial communications protocols in over a decade, so I'm really sorry if I haven't kept up with the parts available to handle them.

There's nothing obsolete about HDLC. A big chunk of the work I do involves restoring communication between hardware that has worked satisfactorily for decades, yet the "other end" is no longer functional.

I don't care what the PC's do. I want to know what can be done to make it, once again, into a useful tool for development.


As I've noted in this thread, the PC IS a very useful development tool.

You've stated your case, but haven't provided any supporting facts.


Your reading comprehension is for shit. I reiterate again:

a) I do VHDL design entry and simulation and FPGA synthesis and place and route on my Windows PC.
b) I do microcontroller C and assembly language coding and compilation, and source-level debug on my Windows PC.
c) I do schematic design entry and multilayer PCB layout and signal integrity simulation on my Windows PC.
d) I read datasheets in PDF format on my Windows PC.

In other words, my Windows machine is quite useful.

I believe that, but, as I said, it's only useful for using Windows app's.

So there are some supporting facts. As one wag once said, "you are entitled to your own opinion, but not your own facts."

All along, I've asserted that Windows is the problem, and not the solution. Windows is what causes those long pauses in I/O, for whatever reason, and that's what screws things up.

I'm surely glad I still have running DOS-based PC's. They work as PC's once did, and there's really nothing that can take their place.


Please write a follow-up to this post using a DOS-based PC. Otherwise, enough with the trolling.

Maybe Windows is not the only problem. I'd point out, however, that we, in the industry in the early '80's used the internet, though it was not yet opened to commercial exploitation. Back then, the PC was useful as a terminal, but could be used for IP comm's. You just had to have the correct software. In the early '80's, it was fashionable to use *nix rather than DOS, and it was more convenient. After spending a fortune on Sun and Apollo hardware and software, I ultimately gave up on *nix. Now, of course, I'm having to look seriously at LINUX. The only catch there is in the doc's, which seldom are as up to date as last decade's software.

-a


Since our goals are different, I'm not surprised that your experience and mine differ considerably. You consider everything on which the paint is dry to be obsolete. By that standard, there's lots of "obsolete" stuff that is still considerably valued by those who have to use it every day. As I said, I work in that arena quite a bit. As a consequence, I need the tools to do that. Those current-generation Spartans may sell for 5 bucks if you use 1k units/day, but I, myself, wouldn't use more than a half dozen, ever, particularly since the current XILINX software won't even program the parts I acquired just a few years ago, hence, I have to preserve the old software, just so it will still program my devices. Further, that $5 price would be exceeded by the required level shifters. That's why I often use the old Spartan-II's and 9500-series CPLD's which are still 5-volt tolerant.

As I've said many times ... Where you sit determines what you see.

RE


List of 83 messages in thread
TopicAuthorDate
ready made board with 2 UARTs equipped ..      Erik Malund      01/27/10 09:00      
   Send me details      Joseph Hebert      01/27/10 19:27      
   SiLabs kit      Andy Neil      01/28/10 01:33      
      they don't, but      Erik Malund      01/28/10 04:50      
   Can you give more details ?      Kiran V. Sutar      01/28/10 04:17      
      if it was to be made, I need no assistance since ...      Erik Malund      01/28/10 04:46      
         ...and I thought Price was the issue...      Kiran V. Sutar      01/29/10 09:50      
   One Suggestion      Mahesh Joshi      02/03/10 08:05      
      the MX chips are being phased out      Erik Malund      02/03/10 08:27      
   I sent you email      Grant Beattie      02/03/10 15:46      
      read, answered, thanks      Erik Malund      02/03/10 18:25      
   you can use sm5964      Michael Ma      02/11/10 01:18      
      the idea was stated as...      Erik Malund      02/12/10 07:57      
         It is a suggestion      Michael Ma      02/27/10 22:09      
            Not a good idea      Andy Neil      02/28/10 01:11      
            that it is      Erik Malund      02/28/10 08:09      
   How about Phycore?      AP Charles      02/12/10 08:39      
      Legacy Product      Andy Neil      02/12/10 09:08      
         oh, yes      Erik Malund      02/12/10 09:42      
            Have a look at grifo      AP Charles      02/12/10 09:57      
   This looks good too      AP Charles      02/12/10 08:49      
   I've been wondering ...      Richard Erlacher      02/28/10 01:16      
      Likewise      Andy Neil      02/28/10 02:34      
         Maybe, but who makes 'em?      Richard Erlacher      02/28/10 09:38      
            8052 with only 1 UART      Andy Neil      02/28/10 11:15      
               I'm surprised, but that's the case!      Richard Erlacher      03/01/10 01:08      
                  why surprised?      Erik Malund      03/01/10 07:35      
                     That's what I thought      Andy Neil      03/01/10 07:49      
                     I never thought of it in those terms ...      Richard Erlacher      03/01/10 08:20      
                        comments      Erik Malund      03/01/10 08:47      
                           It could be done with two wires and 2-UART MCU      Richard Erlacher      03/01/10 12:41      
      120 devboards ...      Erik Malund      02/28/10 07:05      
         How difficult or costly would it be to add one?      Richard Erlacher      02/28/10 09:40      
            neither difficult nor costly      Erik Malund      02/28/10 18:31      
         SILABs 040 has 2 uarts on it      Marshall Brown      03/15/10 19:58      
   with ds89c450 or 430      JecksonS Ben      02/28/10 20:06      
      But that's a chip - not a board!      Andy Neil      03/01/10 01:50      
         cheap boards      JecksonS Ben      03/01/10 19:49      
            this is what's meant      Richard Erlacher      03/01/10 23:40      
               No RS485      Andy Neil      03/02/10 02:26      
                  Example      Andy Neil      03/02/10 03:35      
                     bad example      Jan Waclawek      03/02/10 04:02      
                        No - excellent example!      Andy Neil      03/02/10 05:29      
                           likewise with that other board ...      Richard Erlacher      03/02/10 10:01      
                           And did *you* know what are you looking for?      Jan Waclawek      03/02/10 13:30      
                              You got it      Andy Neil      03/02/10 14:34      
                  why "never"?      Jan Waclawek      03/02/10 03:58      
                     the PC's not the best example ...      Richard Erlacher      03/02/10 10:17      
                        PC as an example      Jan Waclawek      03/02/10 13:21      
                           Lots of toys ... little of any practical use.      Richard Erlacher      03/02/10 17:59      
                              Different tools can be used in different ways      Per Westermark      03/12/10 13:11      
                                 where is your head wedged?      Richard Erlacher      03/13/10 19:47      
                                    Don't blame the PC for solving wrong things with USB      Per Westermark      03/13/10 20:31      
                                       There are many things for which USB is unsuited      Richard Erlacher      03/14/10 19:32      
                                          Every change since 1980 isn't for the worse        Per Westermark      03/14/10 23:02      
                                             Maybe, but this one is      Richard Erlacher      03/15/10 12:00      
                                                again      Andy Peters      03/15/10 13:02      
                                                   Thta's what you say ...      Richard Erlacher      03/16/10 02:56      
                                                      that's what you always say      Andy Peters      03/16/10 12:04      
                                                         Where you sit determines what you see      Richard Erlacher      03/17/10 12:02      
                                                            Where did you sit?      Per Westermark      03/17/10 12:37      
                                                   SPI solves completely different problem than HDLC      Per Westermark      03/18/10 08:50      
                                                and again      Stefan KAnev      03/15/10 13:37      
                                                   what about the required size of the driver?      Richard Erlacher      03/16/10 02:48      
                                                      required size of driver      Stefan KAnev      03/16/10 07:32      
                                                         What do you mean by PCL Cost?      Richard Erlacher      03/17/10 12:04      
                                                            price difference between similar printers -      Stefan KAnev      03/17/10 13:16      
                                                Define narrow view - I see oportunities, i.e. the reverse      Per Westermark      03/15/10 13:42      
                                                   not relevant      Richard Erlacher      03/16/10 02:59      
                                                      So the Windows driver didn't list 8051 compatibility???      Per Westermark      03/16/10 03:47      
                                          I vote Richard as president for ...      Erik Malund      03/15/10 13:20      
                                             That's what one would expect from you, Erik      Richard Erlacher      03/16/10 03:00      
                              USB and fixed-rate transfer      Andy Peters      03/15/10 12:50      
                                 Fortunately, there's DOS ...      Richard Erlacher      03/16/10 03:07      
                        Linux - I thought as much      Andy Neil      03/03/10 01:07      
                        PCs        Andy Peters      03/15/10 12:48      
                           you forgot about LINUX      Richard Erlacher      03/16/10 03:20      
   By this time, anybody could have built one...      Kiran V. Sutar      03/02/10 03:11      
      Funnily enough, ...      Andy Neil      03/02/10 03:33      
      no      Erik Malund      03/02/10 08:06      
   I Hate to ask this....      Justin Fontes      03/13/10 01:44      
      A *very* common requirement!      Andy Neil      03/13/10 02:05      
      if indeed      Erik Malund      03/13/10 07:08      

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