serial communication

Discussion in 'The Projects Forum' started by mehtab102, Aug 11, 2011.

  1. mehtab102

    Thread Starter Member

    Jun 21, 2011
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    i want to know serial communication.
    somrthing like tutorials..
    plz help me guys
     
  2. praondevou

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    Jul 9, 2011
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  3. mehtab102

    Thread Starter Member

    Jun 21, 2011
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    initially
    i want serial communication b/w two controller 80c51
     
  4. praondevou

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    Jul 9, 2011
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  5. mehtab102

    Thread Starter Member

    Jun 21, 2011
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    what about this link..
    its empty
    and i know about asm. language..not c...
    am waiting
     
  6. mehtab102

    Thread Starter Member

    Jun 21, 2011
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    i want to know how to connect controller for receiving and transmitting..
    i want to know viav schmatics
     
  7. SgtWookie

    Expert

    Jul 17, 2007
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  8. mehtab102

    Thread Starter Member

    Jun 21, 2011
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    sir i read this.
    now tell me how to transfer data serially b/w two controllers
    tjeir schmatics
    plz
     
  9. mehtab102

    Thread Starter Member

    Jun 21, 2011
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    bed web site...
    i hate this site...and **** this site....
    no help i got yet...
    shame on you
     
  10. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    Well, what do expect if you ask something like:
    Your questions are too vague. "Tell me about serial communication" is just not something anyone could respond to.

    It works like this:

    You read a tutorial or a datasheet or DIY-instruction, or you explain the project you want to do. And then you ask for help on a specific issue/problem.

    The website is actually quite good, but people are here to help others and not to do all the thinking for you.
     
    DerStrom8, R!f@@ and SgtWookie like this.
  11. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    If the two microcontrollers you want to connect have the same power supply you can connect the TX line of one of them with the RX line of the other and vice versa. (P3.0 and P3.1).

    If they have different power supplies I recommend using a RS232 or RS485 interface.
    For RS232 you use the MAX232 interface IC, for RS485 you can use a 75176 transceiver. You may also isolate the communication bus from your MCU circuit via optocouplers.

    However , if have no experience in programming a microcontroller, then I recommend you look for a tutorial on how to do some smaller projects first.
     
  12. mehtab102

    Thread Starter Member

    Jun 21, 2011
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    but you should reply
    you dont try to take pain..
     
  13. mehtab102

    Thread Starter Member

    Jun 21, 2011
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    i want schmatics....
    how i know that its serial communication....
    how to connect..how i analyse that its running according to my code...??/
    u should ask me that what u want..what you wana do...????
     
  14. Kermit2

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    Feb 5, 2010
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    Well, here you go. :) One schematic for an RS232 comm port. Whatcha gonna build?

    [​IMG]
     
  15. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    If you know that someone needs to ask you this, why not put it right in your first post??? This way you could get an answer very quickly! :confused::confused::confused:
     
    Last edited: Aug 17, 2011
  16. SgtWookie

    Expert

    Jul 17, 2007
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    You ask very brief questions that are rather vague, and you expect lengthy replies that take a lot of work to research and write, and then you either don't seem to understand the reply, or want more replies immediately.

    This board is all volunteers. Nobody is paid to make replies, and nobody is obliged to reply to a topic. We all do this for enjoyment in our "spare time", and help people who usually seem generally appreciative of our efforts.

    There are a LOT of people on the board that want answers to their questions, and not as many that can give answers. If you are not getting the amount of attention that you want, then perhaps you should look elsewhere.
     
  17. mehtab102

    Thread Starter Member

    Jun 21, 2011
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    thnx so much..
    here is some confussion about ic. no that which ic is connected...excpt max232
    plz clear this schematics....
     
  18. kubeek

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    Sep 20, 2005
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    DerStrom8 likes this.
  19. SgtWookie

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    Jul 17, 2007
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    See the attached schematic; it is drawn for the uC's that you are using.

    If you are not actually planning on using the RS-232 standard, you can simply cross-connect the TXD and RXD pins from one uC to the other. They must have a common ground. If you need for them to be electrically isolated, you can use optoisolators.
     
  20. mehtab102

    Thread Starter Member

    Jun 21, 2011
    62
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    yes this is clear...
    i understand about TXD and RXD...
    now i want communication b/w 2 microcontrollers 89c51...
    help me about this..with schematics...
    thnx..
     
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