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Hi,
How can use the ADC channels on GPIO socket. i want to use 3 adc input but the board has only one pot. i can connect 2 extra but in software how can use them. is ADC drive in linux adaptable for changing the channels?
is there a simple example please?


Thankyou for your help

Im not sure if linux has a driver for it.


But directly via i/o...
To read the other channels you need to change the channel on the mux then tell the adc to perform a conversion then read the value (unless you have the READ_START bit set, in which case a read will cause an auto adc calculation)

To change the channel, set the proper bits of the ADCCON register.

See sample code without OS\2440test\src\adc.c for example

hello.I there any tip about adding an adc input ?