LED strip color mixer with OLED display

1#include <Adafruit_NeoPixel.h>
2#define LED_PIN    6
3#define LED_COUNT  30
4Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
5#define  joyX A2
6#define joyY A1
7#include "U8glib.h" 
8
9U8GLIB_SSD1306_128X32  u8g(U8G_I2C_OPT_NONE | U8G_I2C_OPT_DEV_0); //Initialize OLED display
10
11
12int  r = 0; 
13
14int g = 0;
15
16int b = 0;//These three variables determine RGB  values
17
18int num = 1; //This variable helps switch between colors.
19
20const  int swpin = 5; //Defining switch button pin
21 
22int SW = 0;
23
24void draw()
25{
26//READINGS-------------------------------------------------------------------
27  int X;
28  int Y;
29  int Xval;
30  int Yval;
31  
32  
33  
34  X = analogRead(joyX);  //Reading off of VRx
35  Y = analogRead(joyY); //Reading off of VRy
36
37  Xval  = map(X, 0, 1023, 10, 0); 
38  Yval = map(Y, 0, 1023, 255, 0); //mapping values  
39
40//COLOR SWITCHING-------------------------------------------------------------
41  if(Xval < 9){   //This bit of code helps us switch between R, G and B.
42    num  = num + 1; 
43    }
44  if(Xval > 1){
45    num = num - 1;
46    }                  
47
48//LIMITS-------------------------------------------------------------------
49  if(num > 3){ //This bit creates a cycle between colors
50    num = 1;    
51  }
52  if(num < 1){
53    num = 3;
54  }
55
56
57//Red-value-------------------------------------------------------------------------------------------------------
58char  buf[8]; //Define buffer
59
60if(r < 0){
61  r = 255;
62}
63                   //Cycles  red value
64  if(r > 255){
65  r = 0;
66 }
67 
68//Write text. (x, y, text)  
69u8g.drawStr(1, 16, "R-");
70u8g.drawStr(20, 16, itoa(r, buf, 10)); //itoa(int1,  buffer, int2) converts int1(base int2) to ASCII format. Buffer stores this data.
71  
72//Green-value-----------------------------------------------------------------------------------------------------
73
74
75if(g  < 0){
76  g = 255;
77}
78              //Cycles green value
79  if(g > 255){
80  g = 0;
81 }
82
83
84u8g.drawStr(64, 16, "G-");
85u8g.drawStr(84, 16, itoa(g,  buf, 10));
86
87//Blue-value------------------------------------------------------------------------------------------------------
88
89
90if(b  < 0){
91  b = 255;
92}
93               //Cycles blue value
94if (b > 255){
95  b = 0;
96}
97
98u8g.drawStr(1, 32, "B-");
99u8g.drawStr(20, 32, itoa(b,  buf, 10));
100
101//LINE (x1, y1, x2, y2)-------------------------------------------------------------------------------------------
102u8g.drawLine(1,  17, 128, 17);
103//draw a line (x1, y1, x2, y2)
104
105//SET COLOR------------------------------------------------------------------------------------------------------------
106u8g.drawStr(64,  32, "Color-");
107
108  switch(num) {
109    /*This function only converts the  num values to R, G and B strings according to the current color being edited.
110      This code makes sure that when editing value intensity, the 'Color' field  actually switches to the correct color(R, G or B).*/
111
112    case 1  :
113        u8g.drawStr(115,  32, "R");
114          if(Yval > 230){
115              r = r+1;
116          }  
117
118          if(Yval < 20){
119              r = r-1;
120          } 
121        break;
122  
123    case 2  :
124        u8g.drawStr(115, 32, "G");
125          if(Yval  > 230){
126             g = g+1;
127            } 
128
129          if(Yval < 20){
130             g = g-1;
131            } 
132        break;
133      
134    case  3  :
135        u8g.drawStr(115, 32, "B");
136          if(Yval > 230){
137             b  = b+1;
138              } 
139            
140              if(Yval < 20){
141              b  = b-1;
142              } 
143        break;  
144  }
145}
146
147void setup() {
148  u8g.setFont(u8g_font_unifont); //Set text font
149  pinMode(swpin, INPUT_PULLUP);  //Define the pin mode for the switch button
150  strip.begin();   //Initiate LED  strip       
151  strip.show();    //Update Strip
152  strip.setBrightness(50);  //Set the brightness of each NeoPixel
153}
154
155
156void loop() {
157  u8g.firstPage();
158  do {draw();
159  } while (u8g.nextPage()); //Draw loop (OLED)
160  delay(10);  //Delay before each loop begins
161  if(SW < 1){ //Ensures that the strip stays  on at all times; you can use the int SW and link it to input swpin to assign to  it a different function.
162     colorWipe(strip.Color(r,   g,   b), 5);//The variables  r g and b are linked to the values you will see on the OLED. The number '5' defines  the number of seconds it takes to fill up the entire strip (Neopixels turn on one  at a time in this function). 
163    }
164  
165}
166void colorWipe(uint32_t color,  int wait) { //Defining a new function to display the color. 
167  for(int i=0; i<strip.numPixels();  i++) { // For each pixel in strip:
168    strip.setPixelColor(i, color);         //  Set pixel's color 
169    strip.show();                          //  Update strip  to match
170    delay(wait);                           //  Pause for a moment
171  }
172 }
173
174