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Andy Neil
12/02/13 02:21
Read: 1028 times

#190173 - "working fine" (sic)
Responding to: Mohit Gupta's previous message
Mohit Gupta said:
My new and old Keyboards are working fine (sic) with ARM and AVR microcontrollers.

Again, that could be more by luck than design.

So what have you done to investigate the differences between the ARM, AVR, and 8051 versions?

Is there be any issue with pull up lines.

Your oscilloscope traces should answer that.

I had checked the timing waves on Oscilloscope and it seems ok.

What does "seems OK" mean?

Have you thoroughly verified it against the specification?

Have you compared the 8051 traces against ARM, AVR, and PCs?

Apart from low-level timing, have you looked for differences in higher-level message details...

List of 16 messages in thread
Old PS2 Keyboards (White) Working, New Keyboard not working      Mohit Gupta      11/28/13 23:59      
   "working fine" (sic)      Andy Neil      11/29/13 01:28      
      PS2 Keyboards are not working      Mohit Gupta      12/01/13 22:00      
          "working fine" (sic)       Andy Neil      12/02/13 02:21      
   Maybe this will help      Richard Erlacher      12/04/13 11:19      
      Here's a link that might be useful      Richard Erlacher      12/20/13 05:30      
         Dead horse?      Andy Neil      12/20/13 15:33      
            Far too many queries fail to define "working"        Richard Erlacher      12/21/13 01:13      
               Working      Mahmood Elnasser      12/21/13 01:34      
               RE: Far too many queries fail to define "working"      Andy Neil      12/21/13 02:18      
               The difference between "Engineering" and just hacking?      Andy Neil      12/21/13 02:48      
                  The core of engineering is not experimenting        Richard Erlacher      12/24/13 02:03      
                     experimenting equals ....      Erik Malund      12/25/13 10:23      
                        Yes ... likewise, believing the first page of the datasheet      Richard Erlacher      12/26/13 01:16      
                           RE: believing the first page of the datasheet      Andy Neil      12/26/13 06:56      
                              Exactly!      Richard Erlacher      12/26/13 13:37      

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