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?
Don't touch the pin then, why do you feel the need to touch it?
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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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