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09/24/12 21:36
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#188440 - Dallas, Dptr, and DB
Responding to: Kai Klaas's previous message
The Dallas controller sounds like a good one to use. I have no idea about the serial bus select speed on the 89S52, I've used serial only for musical midi with a 12 mhz xtal.
The dptr select- that might have been my problem with my 89S52 movx instructions. I'll try that next time.

And a note to Jim- thanks again! The movc A,@A+dptr instructions worked perfect as you suggested. I had a perfect 256 byte sinewave first try.
The 89LP6440 apparantly defaults to Xram because a simple .db statement with a movc reads that sinewave just fine. I tried it at addresses F000, 8000, 1000, 2000, and 04. I never had to set memcon or auxr which normally enable Xram, Flash data, or Extra ram.

List of 17 messages in thread
.db instr does not work like before with movx A,@dptr      Rick Gebhardt      09/23/12 22:16      
   Brain Fade ?      Jim Granville      09/23/12 22:57      
      memory access      Rick Gebhardt      09/24/12 01:30      
         Did you ever try the Maxim/Dallas DS89C4x0?      Richard Erlacher      09/24/12 10:18      
   Handle the dptr with care...      Kai Klaas      09/24/12 10:38      
      Dallas, Dptr, and DB      Rick Gebhardt      09/24/12 21:36      
         not really      Erik Malund      09/25/12 08:50      
            Perhaps what he means is ...       Richard Erlacher      09/25/12 11:28      
               Make no mistake...       Kai Klaas      09/25/12 12:44      
                  and also the XMEGA      Jim Granville      09/25/12 23:36      
                     XMEGA ADC      Maarten Brock      09/26/12 03:00      
                        I agree...      Kai Klaas      09/26/12 17:18      
               those samples that Andy and others were expecting       Andy Neil      09/25/12 15:13      
            Is it 2007 already??      Andy Neil      09/25/12 15:17      
               That's why I refer to them as MAXIM/DALLAS       Richard Erlacher      09/25/12 21:52      
                  Part Numbers ?      Jim Granville      09/25/12 23:29      
                     None in particular ...       Richard Erlacher      09/26/12 16:01      

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