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rgb-exp.ino
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rgb-exp.ino
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#include <DS1302.h>
// Init the DS1302
DS1302 rtc(2, 3, 4);
int wait = 500; //500ms for 30min fade // 10ms internal crossFade delay; increase for slower fades
int hold = 500; // Optional hold when a color is complete, before the next crossFade
int DEBUG = 1; // DEBUG counter; if set to 1, will write values back via serial
int loopCount = 25; // How often should DEBUG report?
int repeat = 1; // How many times should we loop before stopping? (0 for no stop)
int j = 0; // Loop counter for repeat
int setHour = 5; // Set hours to wake (military time)
int setMin = 30; // Set minute to wake
bool started = false;
int sleepHour = 6; // Set hours to wake (military time)
int sleepMin = 15; // Set minute to wake
// Output
int redPin = 9; // Red LED, connected to digital pin 9
int grnPin = 10; // Green LED, connected to digital pin 10
int bluPin = 11; // Blue LED, connected to digital pin 11
// Color array
int colorGrid[36][3] = {
{0, 0, 0 },
{3, 0, 0},
{6, 0, 0},
{9, 0, 0},
{12, 0, 0},
{15, 0, 0},
{18, 0, 0},
{21, 0, 0},
{24, 0, 0},
{27, 0, 0},
{30, 0, 0},
{32, 5, 0},
{34, 10, 0},
{36, 15, 0},
{38, 20, 0},
{40, 25, 0},
{42, 28, 0},
{44, 31, 0},
{46, 34, 0},
{48, 37, 0},
{50, 40, 0},
{52, 42, 6},
{54, 44, 12},
{56, 46, 18},
{58, 48, 24},
{60, 50, 30},
{64, 56, 40},
{68, 62, 50},
{72, 68, 60},
{76, 74, 70},
{80, 80, 80},
{84, 84, 84},
{88, 88, 88},
{92, 92, 92},
{96, 96, 96},
{100, 100, 100}
};
// etc.
// Set initial color
int redVal = colorGrid[0][0];
int grnVal = colorGrid[0][1];
int bluVal = colorGrid[0][2];
// Initialize color variables
int prevR = redVal;
int prevG = grnVal;
int prevB = bluVal;
Time t;
// Set up the LED outputs
void setup()
{
//run once, to set time
// rtc.setDOW(FRIDAY); // Set Day-of-Week to FRIDAY
// rtc.setTime(18, 23, 0); // Set the time to 12:00:00 (24hr format)
// rtc.setDate(11, 1, 2019); // Set the date to date,month,year
pinMode(redPin, OUTPUT); // sets the pins as output
pinMode(grnPin, OUTPUT);
pinMode(bluPin, OUTPUT);
if (DEBUG) { // If we want to see values for debugging...
Serial.begin(9600); // ...set up the serial ouput
}
}
// Main program: list the order of crossfades
void loop()
{
t = rtc.getTime(); // Make a time class called 't'
// // Send Day-of-Week
// Serial.print(rtc.getDOWStr());
// Serial.print(" ");
//
// // Send date
// Serial.print(rtc.getDateStr());
// Serial.print(" -- ");
Serial.print(colorGrid[1][0]);
// Send time
Serial.println(rtc.getTimeStr());
if (t.hour == setHour && t.min == setMin && started == false) // Check if it's time to wake up!
{
alarm();
}
else if (t.hour == sleepHour && t.min == sleepMin && started == true)
{
reset();
}
// Wait one second before repeating
delay (1000);
}
void alarm()
{
started = true;
for (int i = 1; i < 36; i++) {
Serial.print("Swath: ");
Serial.print(colorGrid[i][0]);
Serial.print(" | ");
Serial.print(colorGrid[i][1]);
Serial.print(" | ");
Serial.print(colorGrid[i][2]);
crossFade(colorGrid[i]);
}
}
void reset()
{
started = false;
redVal = colorGrid[0][0];
grnVal = colorGrid[0][1];
bluVal = colorGrid[0][2];
// reset color variables
prevR = redVal;
prevG = grnVal;
prevB = bluVal;
analogWrite(redPin, 0);
analogWrite(grnPin, 0);
analogWrite(bluPin, 0);
}
/* BELOW THIS LINE IS THE MATH -- YOU SHOULDN'T NEED TO CHANGE THIS FOR THE BASICS
*
* The program works like this:
* Imagine a crossfade that moves the red LED from 0-10,
* the green from 0-5, and the blue from 10 to 7, in
* ten steps.
* We'd want to count the 10 steps and increase or
* decrease color values in evenly stepped increments.
* Imagine a + indicates raising a value by 1, and a -
* equals lowering it. Our 10 step fade would look like:
*
* 1 2 3 4 5 6 7 8 9 10
* R + + + + + + + + + +
* G + + + + +
* B - - -
*
* The red rises from 0 to 10 in ten steps, the green from
* 0-5 in 5 steps, and the blue falls from 10 to 7 in three steps.
*
* In the real program, the color percentages are converted to
* 0-255 values, and there are 1020 steps (255*4).
*
* To figure out how big a step there should be between one up- or
* down-tick of one of the LED values, we call calculateStep(),
* which calculates the absolute gap between the start and end values,
* and then divides that gap by 1020 to determine the size of the step
* between adjustments in the value.
*/
int calculateStep(int prevValue, int endValue) {
int step = endValue - prevValue; // What's the overall gap?
if (step) { // If its non-zero,
step = 100/step; // divide by 1020
}
return step;
}
/* The next function is calculateVal. When the loop value, i,
* reaches the step size appropriate for one of the
* colors, it increases or decreases the value of that color by 1.
* (R, G, and B are each calculated separately.)
*/
int calculateVal(int step, int val, int i) {
if ((step) && i % step == 0) { // If step is non-zero and its time to change a value,
if (step > 0) { // increment the value if step is positive...
val += 1;
}
else if (step < 0) { // ...or decrement it if step is negative
val -= 1;
}
}
// Defensive driving: make sure val stays in the range 0-255
if (val > 255) {
val = 255;
}
else if (val < 0) {
val = 0;
}
return val;
}
/* crossFade() converts the percentage colors to a
* 0-255 range, then loops 1020 times, checking to see if
* the value needs to be updated each time, then writing
* the color values to the correct pins.
*/
void crossFade(int color[3]) {
Serial.println(rtc.getTimeStr());
// Convert to 0-255
int R = (color[0] * 255) / 100;
int G = (color[1] * 255) / 100;
int B = (color[2] * 255) / 100;
int stepR = calculateStep(prevR, R);
int stepG = calculateStep(prevG, G);
int stepB = calculateStep(prevB, B);
for (int i = 0; i <= 100; i++) {
redVal = calculateVal(stepR, redVal, i);
grnVal = calculateVal(stepG, grnVal, i);
bluVal = calculateVal(stepB, bluVal, i);
analogWrite(redPin, redVal); // Write current values to LED pins
analogWrite(grnPin, grnVal);
analogWrite(bluPin, bluVal);
delay(wait); // Pause for 'wait' milliseconds before resuming the loop
if (DEBUG) { // If we want serial output, print it at the
if (i == 0 or i % loopCount == 0) { // beginning, and every loopCount times
Serial.print("Loop/RGB: #");
Serial.print(i);
Serial.print(" | ");
Serial.print(redVal);
Serial.print(" / ");
Serial.print(grnVal);
Serial.print(" / ");
Serial.println(bluVal);
}
DEBUG += 1;
}
}
// Update current values for next loop
prevR = redVal;
prevG = grnVal;
prevB = bluVal;
delay(hold); // Pause for optional 'wait' milliseconds before resuming the loop
}