Undoing revision 628 because it broke analogRead() on analog inputs 8 to 15 of the Arduino Mega.
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@ -42,7 +42,7 @@ int analogRead(uint8_t pin)
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// set the analog reference (high two bits of ADMUX) and select the
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// channel (low 4 bits). this also sets ADLAR (left-adjust result)
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// to 0 (the default).
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ADMUX = (analog_reference << 6) | (pin & 0x0f);
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ADMUX = (analog_reference << 6) | (pin & 0x07);
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#if defined(__AVR_ATmega1280__)
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// the MUX5 bit of ADCSRB selects whether we're reading from channels
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