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???
01/30/09 07:57
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 		 #161838 - Do the Loopback!
Responding to: ???'s previous message
As Jan said earlier, you should prove your hardware first.

Put a hardware loopback at the microcontroller end: if the microcontroller is socketed, just remove it from the socket & link the Rx & Tx pins in the socket.

  • If the PC then receives the looped-back data, you know that the problem is within the microcontroller;

  • If the PC then does not receive the looped-back data, you know that the problem is somewhere before the microcontroller...

    • List of 16 messages in thread
    TopicAuthorDate
    max232 and 8051 serial communication problem            01/01/70 00:00      
       max232 and 8051 serial communication problem            01/01/70 00:00      
       FAQ            01/01/70 00:00      
          Circuit is cleared            01/01/70 00:00      
             Keil            01/01/70 00:00      
                Keil and assembler            01/01/70 00:00      
                   RE: Keil and assembler, etc...            01/01/70 00:00      
                      Able to send from PC with the details..but. receive            01/01/70 00:00      
                         unusable info            01/01/70 00:00      
                            package is MAX232 DIP package            01/01/70 00:00      
                               Do the Loopback!            01/01/70 00:00      
                               COM port configuration            01/01/70 00:00      
                                  8051 hardware loop back is ok..but PC loop back            01/01/70 00:00      
       success at last            01/01/70 00:00      
          So what was the secret?            01/01/70 00:00      
             Corrected VB program            01/01/70 00:00      

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