PLIZ CHECK MY SCHEMATIC,pic16f84->max232->gsm phone


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  1. #1
    Join Date
    Mar 2010
    Posts
    20

    Default Hyperterminal

    When i connnect the phone to the PC and test the cable with hyperterminal, there is no response thats no ERROR or OK, what could be the problem,
    I used the following commands at the hyperterminal,

    AT
    I expected OK or ERROR but its blank
    AT+CPIN?
    I expected +CPIN? READY OR ERROR but blank also

    Could it be the cable?, PC or settings of PC, pliz guide me.
    regards
    dumato

  2. #2
    Join Date
    Nov 2003
    Location
    Greece
    Posts
    4,182

    Default

    A million reasons!

    Maybe the baud rate?

    Ioannis

  3. #3
    Join Date
    Mar 2010
    Posts
    20

    Default hyperteminal

    Thankyou Ioannis; i have tried to change the baud rates but still no response.
    regards
    dumato

  4. #4
    Join Date
    Nov 2003
    Location
    Greece
    Posts
    4,182

    Default

    Usually the baud is at 9600 by default.

    Also USB to Serial converters may pose an issue sometimes.

    Ioannis

  5. #5
    Join Date
    Mar 2010
    Posts
    20

    Default size of hex file

    When i compile my code i generate HEX file of 3KB which cant fit PIC16F84, since its limit is 1KB is there a way i can compress it and load it into pic16f84
    regards

  6. #6
    Join Date
    Nov 2003
    Location
    Greece
    Posts
    4,182

    Default

    No!

    Ioannis

  7. #7
    Join Date
    Mar 2010
    Posts
    20

    Default change of pic

    Thankyou Ioannis, Now the only choice is to change pic but i will have to just to simulate it bse i had only pic16f84, but wen i changed to pic16f877 and tried to simulate, nothing appeared on virtual terminal and proteus gave me this message ''can't perform real time simulation due CPU overlaod, what should i do?
    regards
    dumato

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