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???
07/21/08 11:26
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 		 #156884 - A few answers
Responding to: ???'s previous message
The source of INT0 is the other AT89C52 telling the receiver that data is going to be sent.
I know it's an unusual arrangement but it's just a way to monitor stuff and it I believe it should work this way aswell.

regarding data_ready, as I stated earlier, I changed the program a few times to make it work.
Using Ceibo to debug I encountered a very strange behaving of the program and came to realise that maybe I overheaded the ISR with too many commands and I fail to receive all the packets.

So data_ready isnt actually "data_ready" but a flag that indicated I've received _SOMETHING_ at all, and the main program will check if I received AAH that indicated the end of packet.

I hope that I've cleared up things for you a little bit

List of 37 messages in thread
TopicAuthorDate
Atmel AT89C52 serial port problems            01/01/70 00:00      
   Problem with Serial Port 89C52            01/01/70 00:00      
      Can't be            01/01/70 00:00      
      ATMEL AT89C52 Help?            01/01/70 00:00      
         Why are you considering a discontinued chip?            01/01/70 00:00      
         THIS POST IS IRRELEVALENT TO THIS TOPIC            01/01/70 00:00      
   Seven Hertz            01/01/70 00:00      
      Don't think so            01/01/70 00:00      
   post the whole code...            01/01/70 00:00      
      Pretty much the whole thing - I can add this tho            01/01/70 00:00      
         no main?            01/01/70 00:00      
            It's pretty much what I showed you - here you go.            01/01/70 00:00      
               how do you know WHAT does matter?            01/01/70 00:00      
               how do you use timer0?            01/01/70 00:00      
                  this will be most probably the culprit            01/01/70 00:00      
                     So what you're saying is            01/01/70 00:00      
                        Its timer0 interrupt making trouble            01/01/70 00:00      
                           I dont get it            01/01/70 00:00      
                              none, if            01/01/70 00:00      
                                 funny..            01/01/70 00:00      
                        timer 1            01/01/70 00:00      
                           this IS the program (everything I've posted)            01/01/70 00:00      
   Results + Complete program            01/01/70 00:00      
      evidently you do not blieve in making code readabl            01/01/70 00:00      
         Actually,            01/01/70 00:00      
            double post, please ignore            01/01/70 00:00      
            try a search            01/01/70 00:00      
      Ident Code, Suggestions in many /////////            01/01/70 00:00      
         Question            01/01/70 00:00      
            setting TMOD            01/01/70 00:00      
               24MHz            01/01/70 00:00      
               Done!            01/01/70 00:00      
   NEW - Receiver Promlems            01/01/70 00:00      
      be more specific            01/01/70 00:00      
         A few answers            01/01/70 00:00      
      Got something but still not entirely fixed            01/01/70 00:00      
      look at str_len carefully            01/01/70 00:00      

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