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???
04/08/11 11:54
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 		 #181778 - BEFORE you start coding...
Responding to: ???'s previous message
... you need to do your thinking

See: http://www.8052.com/forum/read/181741

Vaggelis Triantafillou said:
I must use another instruction in order to save the data into iram...


Before you get into the specific implementation details of instructions, memory regions, etc, you need to design how your process will work

Some people like to do this with flowcharts; some prefer pseudo code; etc, etc - but, whatever you do, you need to have a design for what needs to be done before you get bogged-down in how to implement it...

I suggest that you do some research into Ring Buffers (aka "Circular Buffers") and interrupt-driven serial comms...


List of 77 messages in thread
TopicAuthorDate
Intel 8051 RS-232 Interface and fingerprint module !!            01/01/70 00:00      
   I want to see the packet            01/01/70 00:00      
   Comments            01/01/70 00:00      
      MTS-51 8051 Microcomputer Trainer            01/01/70 00:00      
         A what?            01/01/70 00:00      
            please help !!            01/01/70 00:00      
               Never wait until "it works"            01/01/70 00:00      
                  I do it            01/01/70 00:00      
                     RE: "must work to continue writing code"            01/01/70 00:00      
                     you got a very positive reply            01/01/70 00:00      
               You need to provide the information!            01/01/70 00:00      
               P2            01/01/70 00:00      
   that old?            01/01/70 00:00      
      No - not that old!            01/01/70 00:00      
         80C51RD+            01/01/70 00:00      
            But what about those displays??            01/01/70 00:00      
               7-Segment LED displays            01/01/70 00:00      
                  That raises further questions            01/01/70 00:00      
                     BCD to 7-segment decoder            01/01/70 00:00      
                        But still no answer - repeated identical values?            01/01/70 00:00      
                           DELAY            01/01/70 00:00      
                              And you're surprised that you miss characters?!            01/01/70 00:00      
                                 Yes you are right but            01/01/70 00:00      
                                    Think about it            01/01/70 00:00      
                                       too busy to think ?            01/01/70 00:00      
                                          Coding is the LAST thing you should do!            01/01/70 00:00      
   Interesting article about fingerprint recognition            01/01/70 00:00      
      Thank you very much            01/01/70 00:00      
         Nothing to do with nitgen            01/01/70 00:00      
            yes I have read...            01/01/70 00:00      
               Again,            01/01/70 00:00      
                  ok, I am listenig to you..            01/01/70 00:00      
                     Serial Comms            01/01/70 00:00      
                        Σας ευχαριστώ κύριε Αγγελή για την            01/01/70 00:00      
                           BEFORE you start coding...            01/01/70 00:00      
                           Thinking before coding            01/01/70 00:00      
   Thank you very much..            01/01/70 00:00      
      Standard byte-by-byte loop            01/01/70 00:00      
         is this ok ?            01/01/70 00:00      
            Table bytes comparison            01/01/70 00:00      
               Does 8051 has two DPTR ??            01/01/70 00:00      
                  Same DPTR if you don't have two            01/01/70 00:00      
                  Please crarify settings of board/device            01/01/70 00:00      
                     for the moment...            01/01/70 00:00      
                  WHY ON EARTH            01/01/70 00:00      
                     Yes I know what they are...            01/01/70 00:00      
                        Why even keep the received data in an array?            01/01/70 00:00      
                           Please read....            01/01/70 00:00      
                              I have - have you?            01/01/70 00:00      
                                 Yes please            01/01/70 00:00      
                                    you can't store in code memory            01/01/70 00:00      
   Is this code ok ??            01/01/70 00:00      
      Wrong focus for comments - and untested code            01/01/70 00:00      
         I have tested !!            01/01/70 00:00      
            do you have that much external RAM?            01/01/70 00:00      
            No. You think you have tested but not multiple turns            01/01/70 00:00      
            Experimenting with 8051 embedded            01/01/70 00:00      
               thank you...            01/01/70 00:00      
                  Here we are again....            01/01/70 00:00      
                     take a look !!            01/01/70 00:00      
                        Baudrate            01/01/70 00:00      
                           thanks            01/01/70 00:00      
                           yes, but better            01/01/70 00:00      
                              Question            01/01/70 00:00      
                                 difference between ORG 000H and ORG 113H            01/01/70 00:00      
                                    usually.....            01/01/70 00:00      
                                       Now do you understand...            01/01/70 00:00      
                                 ORG is not an instruction, it is ...            01/01/70 00:00      
                                    PLEASE SEE THIS AND HELP !!            01/01/70 00:00      
                                       Copied "END" without first reading what it meant?            01/01/70 00:00      
                                       step-by-step mode            01/01/70 00:00      
                                          thank you            01/01/70 00:00      
                                             Assembler way is difficult            01/01/70 00:00      
                                                Thank you.....            01/01/70 00:00      
                                                   Step through the examples            01/01/70 00:00      
                                                      Of course            01/01/70 00:00      
                                                         THANK YOU ALL            01/01/70 00:00      

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