ARDUINO DUE Define various ADC prescaler

Projects Programming
1

Hello,
I need help to compile on arduino due this
// Define various ADC prescaler

// set up the ADC
ADCSRA &= ~PS_128; // remove bits set by Arduino library
// you can choose a prescaler from above.
// PS_16, PS_32, PS_64 or PS_128
// ADCSRA |= PS_128; // 128 prescaler (8.62kSPS)
// ADCSRA |= PS_64; // 64 prescaler (16.66kSPS)
// ADCSRA |= PS_32; // 32 prescaler (31.25kSPS)
ADCSRA |= PS_16; // 16 prescaler (50kSPS)

but i receive error compiler

someone can help me. Thanks

2

Do you have any code ?
Most of what you posted has been // commented out… we have no idea what your program is trying to do.

3

Post your full code using code tags. Also if there is external devices post links to "Technical" information on them and a schematic as you have wired, not a frizzy would also be helpful.