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Richard Erlacher
09/16/09 21:46
Read: 992 times
Denver, Co
USA


 
#168927 - You can't "test" it that way
Responding to: Per Westermark's previous message
Test is what you do after you know everything is absolutely the way it has to be. Test is what you do to determine what makes your board "break."

Take another look at that board to which I referred. It has everything that you'd need for nearly any task, aside from very task-specific hardware, which you'd have to provide no matter which ARM/AVR/805x chip you choose. That board has the following.

CPU
o Samsung S3C2440A 400MHz, Max freq. 533Mhz
SDRAM
o 64MB SDRAM
o 32bit Data Bus width
o 100MHz Clock
Flash
o 64MB Nand Flash
o 2MB Nor Flash, BIOS installed
LCD
o 4 wire resistive touch screen interface
o Up to 4096 color STN, 3.5 inches to12.1 inches, up to 1024x768 pixels
o Up to 64K color TFT, 3.5 inches to 12.1 inches, up to1024x768 pixels
o In box 256K color 320x240/3.5 inches TFT screen, with touch screen

Interface and Resource

o 1 x 10/100M Ethernet RJ-45(DM9000)
o 3 x Serial Ports(1 RS232 with CTS and RTS)
o 1 x USB Host
o 1 x USB Slave Type B
o 1 x SD Card Interface
o 1 x Stereo audio out, 1 Microphone In
o 1 x 10-Pin JTAG
o 4 x USER LEDs
o 4 x USER buttons
o 1 x PWM Beeper
o 1 x POT can be used for A/D converter adjust
o 1 x AT24C02 for I2C test
o 1 x 20-Pin Camera Interface
o 1 x Battery for RTC
o 1 x Power In(5V), with switch and lamp

Oscillator Freq.
o 12MHz
RTC
o Internal

Expansion Interface
o 1 x 40-Pin 2.0mm GPIO Interface
o 1 x 40-Pin 2.0mm System Bus

Dimension
o 128 x 105(mm)
OS Support
o Linux 2.6.29
o Windows CE.Net 5.0

Now I ask you, "What AVR/805x board can provide all that for comparable cost?" or, "What board that anyone has described on this forum can provide even the required pieces for their task for that price per board?" You might want to deduct the cost of the GLCD if it's not needed, but, after all, this board has lots of features folks have asked how to devise. Now, I don't sell these, nor do I even hold stock in the company, but it looks like a pretty inexpensive way to "get something out the door." You have to be operating at pretty high volume to be able to present a board with this much capability for less money. Just look at what 805x development boards cost when even not so generously equipped.

I don't like the "Expansion Interface" connectors, since compatible IDC cable connectors aren't very easily found, but that will change.

How many times have you seen queries for dataloggers that can use SD? How many times have you seen queries have you seen for USB host or, for that matter, slave? What about the touch screen interface? or a GLCD, or SEEPROM, or Ethernet? Linux supports all that stuff and it's adequately documented how they do it. You, or any one else, can look it up and adapt the LINUX low-level drivers to whatever application you like.

I doubt any of this is dirt-simple, but it is readily do-able, hence using LINUX/GCC to "get there" on this board, and then simply emulating the hardware for whatever target is needed would not be a "big job."

I'd certainly like to see an 805x board that can provide all these features at anywhere near this price, particularly on a 4" x 5" (nominal) board.

Now, while this CPU is capable of much higher speed, it's operating at 100 MHz. I wonder what it would take to get it to operate at >500 MHz, of which the CPU is purportedly capable.

RE


List of 132 messages in thread
TopicAuthorDate
Slowing down      Per Westermark      09/12/09 19:41      
   Its because...      Jez Smith      09/13/09 01:03      
      Never been a problem before      Andy Neil      09/14/09 03:48      
         How many Questions can be asked?      Neil Kurzman      09/14/09 10:52      
            This is why we need to diversify      Jez Smith      09/15/09 09:51      
               Share all your embarassing illnesses      Andy Neil      09/15/09 10:46      
                  poetry corner      Jez Smith      09/17/09 14:23      
               diversification      Erik Malund      09/21/09 15:56      
                  OK      Erik Malund      09/23/09 07:48      
   I agree      Steve M. Taylor      09/13/09 06:48      
      Slow down?      Joseph Hebert      09/15/09 09:12      
         School affects processor of choice for projects      Per Westermark      09/15/09 09:41      
   Just wait another week or two ...      Richard Erlacher      09/13/09 10:51      
   maybe      Erik Malund      09/15/09 10:48      
      Atmel AVR      Per Westermark      09/15/09 11:16      
      Aye, ... there's the rub ...      Richard Erlacher      09/15/09 13:47      
         ARM competes with both 8-bit, 16-bit and 32-bit competitors      Per Westermark      09/15/09 14:38      
            gcc isn't bad, but it doesn't match the code quality      Andy Neil      09/15/09 15:43      
               gcc may catch up      Per Westermark      09/15/09 16:12      
                  being unhappy with gcc      Andy Neil      09/16/09 00:04      
                     They have different roots      Richard Erlacher      09/16/09 10:59      
            It's all about cost      Richard Erlacher      09/16/09 10:45      
               Diversity      Per Westermark      09/16/09 13:11      
                  The jury is still out ...      Richard Erlacher      09/16/09 15:55      
                     Everyones needs are different      Per Westermark      09/16/09 16:28      
                        You can't "test" it that way      Richard Erlacher      09/16/09 21:46      
                           Still, majority of embedded systems are small      Per Westermark      09/17/09 02:38      
                              An evaluation board with a gazillion features are of no use      Andy Neil      09/17/09 02:59      
                              It's not a replacement for the target      Richard Erlacher      09/17/09 08:10      
                           none, but few care      Erik Malund      09/17/09 05:43      
                              Compare its cost ...      Richard Erlacher      09/17/09 08:29      
                                 Assuming that matters        Neil Kurzman      09/17/09 13:50      
                                    Eval Board Cost irrelevant      Andy Neil      09/17/09 14:02      
                                       Not likely, but possible      Richard Erlacher      09/17/09 15:24      
                                    That's not why I use 'em      Richard Erlacher      09/17/09 15:22      
                                       Then make one      Neil Kurzman      09/17/09 17:27      
                                          and look at the cost!      Richard Erlacher      09/17/09 18:40      
                                             what cost      Erik Malund      09/18/09 06:58      
                                                Free!      Andy Neil      09/18/09 07:05      
                                                   Can only confirm      Per Westermark      09/18/09 07:36      
                                                      Sometimes it gives you insight      Richard Erlacher      09/18/09 07:50      
                                                         Relations with distributors may affect freebies      Per Westermark      09/18/09 08:25      
                                                            Perhaps, and because ...      Richard Erlacher      09/18/09 12:29      
                                                               and so what      Erik Malund      09/18/09 13:40      
                                                                  and so, I didn't take it      Richard Erlacher      09/18/09 15:45      
                                                         Insight      Andy Neil      09/18/09 13:51      
                                                            it reflects the manufacturer's attitude about his customer      Richard Erlacher      09/18/09 15:52      
                                                   Just try to get one when you NEED it!      Richard Erlacher      09/18/09 07:42      
                                    It's the platform ... not just the target.      Richard Erlacher      09/23/09 09:52      
                        and '51s      Erik Malund      09/17/09 05:41      
   Maybe all the brow beatings......      Chris Bertrand      09/16/09 10:34      
      There are simple reasons      Richard Erlacher      09/16/09 10:54      
         How to get good answers - Ask Questions The Smart Way      Andy Neil      09/23/09 07:20      
      Which that attitude chris        Jez Smith      09/17/09 04:52      
         Thanks for proving my point for me      Chris Bertrand      09/18/09 14:20      
            Not so fast, Chris ...      Richard Erlacher      09/21/09 23:57      
               Verbally beating them up is the only option.      Andy Neil      09/22/09 01:40      
               You must be joking      Chris Bertrand      09/22/09 19:34      
                  Nobody "lumped you in" ... except you      Richard Erlacher      09/22/09 23:54      
                     Again you are wrong      Chris Bertrand      09/23/09 09:21      
                        If you hadn't demonstrated your unwillingness to search        Richard Erlacher      09/23/09 10:00      
                  A forum is not a tutorial      Andy Neil      09/23/09 00:39      
            I didn't get where I am today...      Andy Neil      09/22/09 00:22      
               You have good points, but think about this...      Chris Bertrand      09/22/09 19:40      
                  Kids; homework      Andy Neil      09/23/09 00:42      
            ASKING for help        Erik Malund      09/22/09 05:03      
               Interesting but I must disagree.... to a point      Chris Bertrand      09/22/09 19:59      
                  Examples?      Per Westermark      09/22/09 21:20      
                     many moons ago before I worked were I do now      Chris Bertrand      09/23/09 09:26      
                        Well, the reason you're "getting it" from me ...      Richard Erlacher      09/23/09 09:48      
                  It's not a default response!      Andy Neil      09/23/09 00:09      
                     i don't disagree.....        Chris Bertrand      09/23/09 09:23      
                        code of how to post a question      Andy Neil      09/23/09 10:02      
                           I get it....seriously      Chris Bertrand      09/23/09 10:40      
                              Arguments doesn't add up with real world      Per Westermark      09/23/09 11:52      
                                 Per, its not about the logic.....      Chris Bertrand      09/23/09 12:10      
                                    Oh yes you did!      Andy Neil      09/23/09 14:14      
                                    Illogical!        Andy Neil      09/23/09 14:37      
                                       Its a resume.....      Chris Bertrand      09/23/09 18:45      
                                          Key Skills      Andy Neil      09/24/09 00:11      
                                             My view        Per Westermark      09/24/09 04:31      
                                                Key skills...      Jan Waclawek      09/24/09 05:04      
                                                decline in 8052.com traffic...      Jan Waclawek      09/24/09 05:16      
                              not really 'grammar'      Erik Malund      09/23/09 13:14      
      with Google, its difficult to wade through the material      Andy Neil      09/22/09 01:45      
         I agree, but seriously.....      Chris Bertrand      09/22/09 19:50      
            If it's overwhelming, you need to find another pursuit.      Richard Erlacher      09/22/09 23:37      
               I really don't know what your problem is      Chris Bertrand      09/23/09 09:20      
                  You haven't improved your syntax ...      Richard Erlacher      09/23/09 10:15      
                     thanks for the chuckle      Chris Bertrand      09/23/09 10:36      
                        I've been a teacher of English since 1952 when I learned it      Richard Erlacher      09/23/09 16:52      
                           You aren't my father or teacher      Chris Bertrand      09/23/09 18:43      
                              pray tell which dictionary has this      Erik Malund      09/23/09 18:46      
                                 it doesn't      Chris Bertrand      09/23/09 18:54      
                                    It seems as though the only one who's "uptight" is you      Richard Erlacher      09/23/09 23:32      
                              To (sic) bad      Andy Neil      09/23/09 23:37      
                                 And this is the petty stuff I'm talking about Andy      Chris Bertrand      09/24/09 06:12      
                                    this is almost hilarious      Erik Malund      09/24/09 07:40      
                                       bravo Erik      Chris Bertrand      09/24/09 07:42      
                                          high standards???      Erik Malund      09/24/09 15:59      
                                             You knew      Chris Bertrand      09/24/09 17:39      
                                                I have no problem ...      Erik Malund      09/25/09 06:31      
                                                   Guess this must be the only site you frequent      Chris Bertrand      09/25/09 07:21      
                                                      Incorrect      Andy Neil      09/25/09 08:26      
                                                         ...      Chris Bertrand      09/25/09 09:51      
                                                      very well, thank you      Erik Malund      09/25/09 08:40      
                                                      two wrongs does not make a right      Erik Malund      09/25/09 08:41      
                                                         Well,      Chris Bertrand      09/25/09 09:53      
                                                         Yes, but a.....      Chris Bertrand      09/25/09 09:54      
                                    Goodness! You said you were done ...      Richard Erlacher      09/24/09 07:40      
                                       Not for you to worry      Chris Bertrand      09/24/09 07:44      
                                          There's another syntax error!      Richard Erlacher      09/24/09 13:25      
                                             Your pathetic      Chris Bertrand      09/24/09 13:36      
                                                was that deliberate...      Andy Neil      09/24/09 13:57      
                                                   He's not that clever ... nor is he that well-versed      Richard Erlacher      09/24/09 14:38      
                                                      Speak for yourself      Chris Bertrand      09/24/09 17:37      
                                                Another syntax error!      Richard Erlacher      09/24/09 22:12      
                                                   Again and again      Chris Bertrand      09/25/09 07:15      
                                    If you think that's "petty"...        Andy Neil      09/24/09 14:47      
                                       Apples and Oranges      Chris Bertrand      09/24/09 17:38      
                                          All apples, to me      Andy Neil      09/25/09 00:41      
                                             Whatever works for you I guess      Chris Bertrand      09/25/09 07:20      
                                                all my programs are 0 warnings, 0 errors.      Andy Neil      09/25/09 08:22      
                                                   Well I guess if it runs      Chris Bertrand      09/25/09 09:52      
                                                      err        Steve M. Taylor      09/25/09 10:01      
                                                         fixed...      Chris Bertrand      09/25/09 10:06      
                                                            Mud throwing      Per Westermark      09/25/09 11:11      
                              You were defeated before you began, Chris      Richard Erlacher      09/23/09 23:46      
            Missing the point      Andy Neil      09/23/09 00:25      
               seconded      Erik Malund      09/23/09 05:24      
            coming to think of it 'how' and 'what'      Erik Malund      09/23/09 05:21      
   "How it's made"      Stefan KAnev      09/25/09 13:08      

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