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The GETADC() function only will work on microprocessors that have an A/D converter.
The pins of the A/D converter input can be used for digital I/O too.
But it is important that no I/O switching is done while using the A/D converter.
Make sure you turn on the AD converter with the START ADC statement or by setting the proper bit in the ADC configuration register.

Some micro’s have more then 7 channels. This is supported as well. The ADCSRB register contains a bit named MUX5 that must be set when a channel higher then 7 is used. The compiler (lib routine) will handle this automatic. This is true for new chips like Mega1280, Mega2560 and probably other new chips with 100 pins.



An example on how to read singled ended input on a Mega1280:
W = Getadc(0 , 64) ' from data sheet : 100000 ADC8
W = Getadc(1, 64) ' from data sheet : 100001 ADC9
This will read channel 0 and 1. The offset is 64 in order to use singled ended input.

ADC8 is portK.0

avr123.nm.ru писал(а):64 это не усиление, а просто двоичное число 100000 в десятичном виде.

берем мегу32

64 это не усиление, а просто двоичное число 100000 в десятичном виде.

EdGull писал(а):

64 это не усиление, а просто двоичное число 100000 в десятичном виде.

а это как???
у меня 100000 как 32 получается