Problem with managing button/logic states.

so i'm trying create midi controller guitar pedal have.

on physical pedal (a line6 m9) each button serves 2 functions.

button1 record/overdub
button2 play/stop

if nothing happening, hitting button 1 go record mode , create loop. if press button 1 again, goes play mode. if press button 2 instead, goes play mode. if press button 2 while in play mode goes stops. if while playing press button1, goes overdub.

that's sort of basic operating principles.

now, in order manage interdependent states, i've created mess of code, , doesn't work. i'm guessing create impossible states, , code can't out of it.

after wrestling debouncing stuff, went button library, , far that's been working fine. don't know how keep track of what's going on, error proof.

also, smaller detail. there benefit (other tidiness) nesting if loops? in code, first 3 bits contain "((button1.uniquepress())". better have if loop starts that, uses elses go next criteria?

here's code.

code: [select]

#include <button.h>

#define led 13

button button1 = button(8,pulldown);
button button2 = button(9,pulldown);
button button3 = button(10,pulldown);

int state1 = 0;               // state of notrecording(0),record(1),overdub(2)
int state2 = 0;               // state of stop(0),play(1)

void setup() {
 pinmode(13,output);
 serial.begin(31250);
}

void loop(){
 
 // ======= record new loop
if ((button1.uniquepress()) && (state1 == 0) && (state2 == 0)) {
 state1 = 1;
 serial.print(0xb0,byte);
 serial.print(50,byte);
 serial.print(127,byte);
 digitalwrite(led,high);
 delay(5);
 digitalwrite(led,low);
}
 
 // ======= overdub (from record state)
if ((button1.uniquepress()) && (state1 == 1) && (state2 == 0)) {
 state1 = 2;
 state2 = 1;
 serial.print(0xb0,byte);
 serial.print(50,byte);
 serial.print(0,byte);
 digitalwrite(led,high);
 delay(5);
 digitalwrite(led,low);
}

// ======= overdub (to play state)
if ((button1.uniquepress()) && (state1 == 2) && (state2 == 1)) {
 state1 = 0;
 serial.print(0xb0,byte);
 serial.print(50,byte);
 serial.print(0,byte);
 digitalwrite(led,high);
 delay(5);
 digitalwrite(led,low);
}

// ======= overdub (from play state)
if ((button1.ispressed()) && (state1 == 0) && (state2 == 1)) {
 state1 = 2;
 serial.print(0xb0,byte);
 serial.print(50,byte);
 serial.print(0,byte);
 digitalwrite(led,high);
 delay(5);
 digitalwrite(led,low);
}

// ======= play
if ((button2.uniquepress()) && (state2 == 0)) {
 state2 = 1;
 serial.print(0xb0,byte);
 serial.print(28,byte);
 serial.print(127,byte);
 digitalwrite(led,high);
 delay(5);
 digitalwrite(led,low);
}

// ======= stop
if ((button2.uniquepress()) && (state2 == 1)) {
 state2 = 0;
 serial.print(0xb0,byte);
 serial.print(28,byte);
 serial.print(0,byte);
 digitalwrite(led,high);
 delay(5);
 digitalwrite(led,low);
}

 // ======= play once
 if(button3.uniquepress()){
 serial.print(0xb0,byte);
 serial.print(80,byte);
 serial.print(127,byte);
 digitalwrite(led,high);
 delay(5);
 digitalwrite(led,low);
 }
}


i thought using built in library "statechanged" since button logic intertwined, didn't know if work right off bat.

like if press button1, , go record mode, press button2, enter play mode, button2 again go stop mode, when press button1 again, need go record mode again, not overdub mode, next state button

Arduino Forum > Forum 2005-2010 (read only) > Software > Syntax & Programs > Problem with managing button/logic states.

arduino