1. #include <Adafruit_NeoPixel.h>
2. #include <avr/sleep.h>
3. #include <avr/power.h>
4. #include <avr/wdt.h>
5.  
6. #ifdef __AVR__
7. #include <avr/power.h>
8. #endif
9.  
10. #define PIN 13
11. #define NEOPIXELS 59
12.  
13. int zapal = 0 ;
14. volatile int f_wdt = 1;
15.  
16. ISR(WDT_vect) {
17.   if (f_wdt == 0) {
18.     // here we can implement a counter the can set the f_wdt to true if
19.     // the watchdog cycle needs to run longer than the maximum of eight
20.     // seconds.
21.     f_wdt = 1;
22.   }
23. }
24.  
25. void enterSleep(void)
26. {
27.   // There are five different sleep modes in order of power saving:
28.   // SLEEP_MODE_IDLE - the lowest power saving mode
29.   // SLEEP_MODE_ADC
30.   // SLEEP_MODE_PWR_SAVE
31.   // SLEEP_MODE_STANDBY
32.   // SLEEP_MODE_PWR_DOWN - the highest power saving mode
33.   set_sleep_mode(SLEEP_MODE_PWR_DOWN);
34.   sleep_enable();
35.  
36.   // Now enter sleep mode.
37.   sleep_mode();
38.  
39.   // The program will continue from here after the WDT timeout
40.  
41.   // First thing to do is disable sleep.
42.   sleep_disable();
43.  
44.   // Re-enable the peripherals.
45.   power_all_enable();
46. }
47.  
48. void setupWatchDogTimer() {
49.   // The MCU Status Register (MCUSR) is used to tell the cause of the last
50.   // reset, such as brown-out reset, watchdog reset, etc.
51.   // NOTE: for security reasons, there is a timed sequence for clearing the
52.   // WDE and changing the time-out configuration. If you don't use this
53.   // sequence properly, you'll get unexpected results.
54.  
55.   // Clear the reset flag on the MCUSR, the WDRF bit (bit 3).
56.   MCUSR &= ~(1 << WDRF);
57.  
58.   // Configure the Watchdog timer Control Register (WDTCSR)
59.   // The WDTCSR is used for configuring the time-out, mode of operation, etc
60.  
61.   // In order to change WDE or the pre-scaler, we need to set WDCE (This will
62.   // allow updates for 4 clock cycles).
63.  
64.   // Set the WDCE bit (bit 4) and the WDE bit (bit 3) of the WDTCSR. The WDCE
65.   // bit must be set in order to change WDE or the watchdog pre-scalers.
66.   // Setting the WDCE bit will allow updates to the pre-scalers and WDE for 4
67.   // clock cycles then it will be reset by hardware.
68.   WDTCSR |= (1 << WDCE) | (1 << WDE);
69.  
70.   /**
71.       Setting the watchdog pre-scaler value with VCC = 5.0V and 16mHZ
72.       WDP3 WDP2 WDP1 WDP0 | Number of WDT | Typical Time-out at Oscillator Cycles
73.       0    0    0    0    |   2K cycles   | 16 ms
74.       0    0    0    1    |   4K cycles   | 32 ms
75.       0    0    1    0    |   8K cycles   | 64 ms
76.       0    0    1    1    |  16K cycles   | 0.125 s
77.       0    1    0    0    |  32K cycles   | 0.25 s
78.       0    1    0    1    |  64K cycles   | 0.5 s
79.       0    1    1    0    |  128K cycles  | 1.0 s
80.       0    1    1    1    |  256K cycles  | 2.0 s
81.       1    0    0    0    |  512K cycles  | 4.0 s
82.       1    0    0    1    | 1024K cycles  | 8.0 s
83.   */
84.   WDTCSR  = (0 << WDP3) | (1 << WDP2) | (1 << WDP1) | (1 << WDP0);
85.   // Enable the WD interrupt (note: no reset).
86.   WDTCSR |= _BV(WDIE);
87. }
88.  
89.  
90. // Parameter 1 = number of pixels in strip
91. // Parameter 2 = Arduino pin number (most are valid)
92. // Parameter 3 = pixel type flags, add together as needed:
93. //   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
94. //   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
95. //   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
96. //   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
97. Adafruit_NeoPixel strip = Adafruit_NeoPixel(NEOPIXELS, PIN, NEO_GRB + NEO_KHZ800);
98.  
99. // IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
100. // pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
101. // and minimize distance between Arduino and first pixel.  Avoid connecting
102. // on a live circuit...if you must, connect GND first.
103.  
104. void setup() {
105.   // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
106. #if defined (__AVR_ATtiny85__)
107.   if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
108. #endif
109.   // End of trinket special code
110.  
111.   Serial.begin(9600);
112.   strip.begin();
113.   Serial.println("Initialising...");
114.   delay(50);
115.   strip.show(); // Initialize all pixels to 'off'
116.   setupWatchDogTimer();
117.   Serial.println("Initialisation complete.");
118.   delay(50);
119. }
120.  
121. void loop() {
122.   Serial.print(zapal);
123.   Serial.print(f_wdt);
124.  
125.   if (f_wdt != 1) {
126.     return;
127.   }
128.  
129.   if (zapal == 0) {
130.     colorWipe(strip.Color(0, 0, 255), 100); // Blue
131.     zapal = 1;
132.     Serial.print(f_wdt);
133.  
134.   }
135.   else {
136.     Serial.print("SLEEP");
137.     f_wdt = 0;
138.     Serial.print(f_wdt);
139.  
140.     enterSleep();
141.     //colorWipe(strip.Color(255, 0, 0), 50); // Blue
142.  
143.   }
144.   // Some example procedures showing how to display to the pixels:
145.   //colorWipe(strip.Color(255, 0, 0), 50); // Red
146.   //colorWipe(strip.Color(0, 255, 0), 50); // Green
147.   // Send a theater pixel chase in...
148.   //theaterChase(strip.Color(127, 127, 127), 50); // White
149.   //theaterChase(strip.Color(127, 0, 0), 50); // Red
150.   //theaterChase(strip.Color(0, 0, 127), 50); // Blue
151.  
152.   //rainbow(20);
153.   //rainbowCycle(20);
154.   //theaterChaseRainbow(50);
155. }
156.  
157. // Fill the dots one after the other with a color
158. void colorWipe(uint32_t c, uint8_t wait) {
159.   for (uint16_t i = 0; i < strip.numPixels(); i++) {
160.     strip.setPixelColor(i, c);
161.     strip.show();
162.     Serial.print("LED: ");
163.     Serial.println(i);
164.     delay(wait);
165.   }
166. }
167.  
168. void rainbow(uint8_t wait) {
169.   uint16_t i, j;
170.  
171.   for (j = 0; j < 256; j++) {
172.     for (i = 0; i < strip.numPixels(); i++) {
173.       strip.setPixelColor(i, Wheel((i + j) & 255));
174.     }
175.     strip.show();
176.     delay(wait);
177.   }
178. }
179.  
180. // Slightly different, this makes the rainbow equally distributed throughout
181. void rainbowCycle(uint8_t wait) {
182.   uint16_t i, j;
183.  
184.   for (j = 0; j < 256 * 5; j++) { // 5 cycles of all colors on wheel
185.     for (i = 0; i < strip.numPixels(); i++) {
186.       strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
187.     }
188.     strip.show();
189.     delay(wait);
190.   }
191. }
192.  
193. //Theatre-style crawling lights.
194. void theaterChase(uint32_t c, uint8_t wait) {
195.   for (int j = 0; j < 10; j++) { //do 10 cycles of chasing
196.     for (int q = 0; q < 3; q++) {
197.       for (int i = 0; i < strip.numPixels(); i = i + 3) {
198.         strip.setPixelColor(i + q, c);  //turn every third pixel on
199.       }
200.       strip.show();
201.  
202.       delay(wait);
203.  
204.       for (int i = 0; i < strip.numPixels(); i = i + 3) {
205.         strip.setPixelColor(i + q, 0);      //turn every third pixel off
206.       }
207.     }
208.   }
209. }
210.  
211. //Theatre-style crawling lights with rainbow effect
212. void theaterChaseRainbow(uint8_t wait) {
213.   for (int j = 0; j < 256; j++) {   // cycle all 256 colors in the wheel
214.     for (int q = 0; q < 3; q++) {
215.       for (int i = 0; i < strip.numPixels(); i = i + 3) {
216.         strip.setPixelColor(i + q, Wheel( (i + j) % 255)); //turn every third pixel on
217.       }
218.       strip.show();
219.  
220.       delay(wait);
221.  
222.       for (int i = 0; i < strip.numPixels(); i = i + 3) {
223.         strip.setPixelColor(i + q, 0);      //turn every third pixel off
224.       }
225.     }
226.   }
227. }
228.  
229. // Input a value 0 to 255 to get a color value.
230. // The colours are a transition r - g - b - back to r.
231. uint32_t Wheel(byte WheelPos) {
232.   WheelPos = 255 - WheelPos;
233.   if (WheelPos < 85) {
234.     return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
235.   }
236.   if (WheelPos < 170) {
237.     WheelPos -= 85;
238.     return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
239.   }
240.   WheelPos -= 170;
241.   return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
242. }