Touching SCL pin

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hasanzadeh99
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Posted by hasanzadeh99: Fri. Nov 15, 2019 - 04:45 AM
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Hello all,

When I touch SCL pin in my  project the program will be pause, it means the LED toggling loop in while loop will be discard.why?

can every body help me?

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AVR Microcontrollers, AVR XMEGA
Last Edited: Fri. Nov 15, 2019 - 01:37 PM
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    js
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    Posted by js: Fri. Nov 15, 2019 - 05:40 AM
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    Don't touch the pin then, why do you feel the need to touch it?

    John Samperi

    Ampertronics Pty. Ltd.

    www.ampertronics.com.au

    * Electronic Design * Custom Products * Contract Assembly

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    Kartman
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    Posted by Kartman: Fri. Nov 15, 2019 - 08:00 AM
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    Your body works as an antenna. When you touch the pin you inject 50/60Hz as well as other noise into the pin. At a guess, it might be that you don't have the correct pull up resistors on the SCL/SDA pins. Should be around 2k2 methinks.

     

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    jgmdesign
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    Posted by jgmdesign: Fri. Nov 15, 2019 - 01:37 PM
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    Answered HERE:

     

    https://www.avrfreaks.net/forum/...

     

    Jim

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