ADC_CHER configuration

Hi,

I'm a new user for arduino DUE and i have a problem for configuration : I want another POT for making special filtrers and I can't find explications for configuration of ADC_CHER[] and the while :

(extract from original code)
ADC->ADC_CHER=0x1CC0; // Enable ADC channels 0,1,8,9 and 10
while((ADC->ADC_ISR & 0x1CC0)!=0x1CC0)

Thanks.

Hi,

thanks for you answer but i don't understand the relation between 0x1CC0 and the number of the channels.

For example, if i want a pot in channel 11 (AD 13), what is the argument for ADC_CHER ?

Thanks

Hello and thanks for clarifying this. The original Pedal Due code had confused me:

ADC->ADC_CHER=0x1CC0; // Enable ADC channels 0,1,8,9 and 10 (???)

The comment says ADC channels but the numbers apparently refer to Arduino pin pad numbers.

And the SAM3 data sheet isn't all that clear. It uses the term "ADC channel" on page 1338 but refers to its pins as AD0..AD15 elsewhere. Plus the somewhat perverse mapping of Arduino pin pads and labeling adds more confusion.

The reality is that the pedal code assigns ADC_CHER=0x1CC0 which enables ADC channels 7, 6, 10, 11, & 12 ( not 0,1,8,9 and 10). However those ADC channels do correspond to Arduino pin pad numbers 0,1,8,9 and 10.

So if I wanted to use just ADC channel 0, I would assign ADC_CHER=0x0001
and connect my input to Arduino Dup pin pad number A7, yes?

Thanks again for helping with this issue.

Cheerio, Aaron[/size]

You post alone solved three of my problems! Thank you! Just a typo: the first binary should have one less 1, so 0001_1100_1100_0000. Easy enough to spot, but might help future visitors? Edit: this reply refers to post #499 by Ray