1  // SPDX-FileCopyrightText: 2019 Anne Barela for Adafruit Industries
 2  //
 3  // SPDX-License-Identifier: MIT
 4  
 5  //  Process button input and return button activity
 6  //  Retained button code from RGB Shades though just using one button
 7  
 8  #define NUMBUTTONS 1
 9  #define MODEBUTTON 2  //define the pin the button is connected to
10  
11  #define BTNIDLE 0
12  #define BTNDEBOUNCING 1
13  #define BTNPRESSED 2
14  #define BTNRELEASED 3
15  #define BTNLONGPRESS 4
16  #define BTNLONGPRESSREAD 5
17  
18  #define BTNDEBOUNCETIME 20
19  #define BTNLONGPRESSTIME 1000
20  
21  unsigned long buttonEvents[NUMBUTTONS];
22  byte buttonStatuses[NUMBUTTONS];
23  byte buttonmap[NUMBUTTONS] = {MODEBUTTON};
24  
25  void updateButtons() {
26    for (byte i = 0; i < NUMBUTTONS; i++) {
27      switch (buttonStatuses[i]) {
28        case BTNIDLE:
29          if (digitalRead(buttonmap[i]) == LOW) {
30            buttonEvents[i] = currentMillis;
31            buttonStatuses[i] = BTNDEBOUNCING;
32          }
33          break;
34  
35        case BTNDEBOUNCING:
36          if (currentMillis - buttonEvents[i] > BTNDEBOUNCETIME) {
37            if (digitalRead(buttonmap[i]) == LOW) {
38              buttonStatuses[i] = BTNPRESSED;
39            }
40          }
41          break;
42  
43        case BTNPRESSED:
44          if (digitalRead(buttonmap[i]) == HIGH) {
45            buttonStatuses[i] = BTNRELEASED;
46          } else if (currentMillis - buttonEvents[i] > BTNLONGPRESSTIME) {
47            buttonStatuses[i] = BTNLONGPRESS;
48          }
49          break;
50  
51        case BTNRELEASED:
52          break;
53  
54        case BTNLONGPRESS:
55          break;
56  
57        case BTNLONGPRESSREAD:
58          if (digitalRead(buttonmap[i]) == HIGH) {
59            buttonStatuses[i] = BTNIDLE;
60          }
61          break;
62      }
63    }
64  }
65  
66  byte buttonStatus(byte buttonNum) {
67  
68    byte tempStatus = buttonStatuses[buttonNum];
69    if (tempStatus == BTNRELEASED) {
70      buttonStatuses[buttonNum] = BTNIDLE;
71    } else if (tempStatus == BTNLONGPRESS) {
72      buttonStatuses[buttonNum] = BTNLONGPRESSREAD;
73    }
74  
75    return tempStatus;
76  
77  }
78  
79  //  Check the mode button (for switching between effects)
80  void doButtons() {
81    switch (buttonStatus(0)) {
82  
83      case BTNRELEASED: // short button press
84        cycleMillis = currentMillis;
85        if (++currentEffect >= numEffects) currentEffect = 0; // loop to start of effect list
86        effectInit = false; // trigger effect initialization when new effect is selected
87        break;
88  
89      case BTNLONGPRESS: // long button press
90        currentBrightness += 51; // increase the brightness (wraps to lowest)
91        FastLED.setBrightness(scale8(currentBrightness, MAXBRIGHTNESS));
92        break;
93    }
94  }