Mapping Feature on Multiple Pentiometers

[nikaskeba]

I've been able to use the mapping on one pentiometer and it works great. Without it, I can't get multiple to work well. Here is my code which really only works for one pentiometer and not two.

CCPotentiometer potentiometers[] = { { 35, {MIDI_CC::Channel_Volume, CHANNEL_1} },

{ 32, {MIDI_CC::Channel_Volume, CHANNEL_2} }};

// The filtered value read when potentiometer is at the 0% position constexpr analog_t minimumValue = 255; // The filtered value read when potentiometer is at the 100% position constexpr analog_t maximumValue = 16383 - 255;

// A mapping function to eliminate the dead zones of the potentiometer: // Some potentiometers don't output a perfect zero signal when you move them to // the zero position, they will still output a value of 1 or 2, and the same // goes for the maximum position. analog_t mappingFunction(analog_t raw) { // make sure that the analog value is between the minimum and maximum raw = constrain(raw, minimumValue, maximumValue); // map the value from [minimumValue, maximumValue] to [0, 16383] return map(raw, minimumValue, maximumValue, 0, 16383); // Note: 16383 = 2¹⁴ - 1 (the maximum value that can be represented by // a 14-bit unsigned number }

[tttapa]

It's not clear to me what the issue is. Please post your full code and the complete error message you're getting.

I think your question might be answered by https://github.com/tttapa/Control-Surface/issues/348#issuecomment-738144784.

[Zlraul]

i think i got the same problems, when i try to use multiple potentiometer using array it affect all CC that on that array.

[tttapa]

when i try to use multiple potentiometer using array it affect all CC that on that array.

This is a hardware issue, usually caused by using high-resistance potentiometers, the Arduino's ADC can only handle up to 10kΩ of output impedance, which corresponds to 20kΩ potentiometers. If your potentiometers don't meet this specification, you get cross-talk between ADC channels. You could add some capacitors between the potentiometer wipers and ground to limit the effect.

Another cause could be power or wiring issues.

[Zlraul]

when i try to use multiple potentiometer using array it affect all CC that on that array.

This is a hardware issue, usually caused by using high-resistance potentiometers, the Arduino's ADC can only handle up to 10kΩ of output impedance, which corresponds to 20kΩ potentiometers. If your potentiometers don't meet this specification, you get cross-talk between ADC channels. You could add some capacitors between the potentiometer wipers and ground to limit the effect.

Another cause could be power or wiring issues.

oh yeah that may be it, i use 100K potentio bc i just have that for a moment, will try some capacitor thanks