Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
LED Neopixel program
/**
* Program name: This program is part of the project Pen Stand: LED Enabled
* Author: Aditya K
* Date: 7/1/2017
* LICENSE: MIT
*
* Discription: This program animates easing effect every time user removes pen from stand.
*
*
* Copyright (c) 2017 Aditya K.
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <FastLED.h>
#include <avr/interrupt.h>
#include <avr/power.h>
#include <avr/sleep.h>
#define PEN_PIN 2
#define NUM_LEDS 40
#define DATA_PIN 6
struct CRGB leds[NUM_LEDS];
volatile bool int_flag = false;
void deep_sleep() {
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
sleep_enable();
sleep_mode();
sleep_cpu();
}
void ease(){
/* code ref: https://github.com/atuline/FastLED-Demos/blob/master/easing/easing.ino */
uint8_t bpm = 30;
uint8_t inner = beatsin8(bpm, NUM_LEDS/4, NUM_LEDS/4*3); // Move 1/4 to 3/4
uint8_t outer = beatsin8(bpm, 0, NUM_LEDS-1); // Move entire length
uint8_t middle = beatsin8(bpm, NUM_LEDS/3, NUM_LEDS/3*2); // Move 1/3 to 2/3
leds[middle] = CRGB::Purple;
leds[inner] = CRGB::Blue;
leds[outer] = CRGB::Aqua;
nscale8(leds,NUM_LEDS,224);
}
void animate() {
uint8_t cycle = 0;
for(;;){
EVERY_N_MILLISECONDS(20){
FastLED.show();
ease();
if(cycle++ == 120) break;
}
}
FastLED.clear();
FastLED.show();
}
void animation_ISR() {
sleep_disable();
int_flag = true;
}
void setup() {
pinMode(PEN_PIN, INPUT_PULLUP);
power_twi_disable();
power_spi_disable();
ADCSRA = 0;
power_adc_disable();
FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
set_max_power_in_volts_and_milliamps(5, 500);
FastLED.clear();
FastLED.setBrightness(100);
FastLED.show();
attachInterrupt(digitalPinToInterrupt(PEN_PIN), animation_ISR, CHANGE);
}
void loop() {
deep_sleep();
if(int_flag) {
bool pin_status = digitalRead(PEN_PIN);
delay(30);
pin_status = digitalRead(PEN_PIN);
// Pen is removed
if(pin_status == HIGH){
animate();
int_flag = false;
}
// Pen is inserted
else if(pin_status == LOW){
int_flag = false;
}
}
attachInterrupt(digitalPinToInterrupt(PEN_PIN), animation_ISR, CHANGE);
delay(50);
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.