https://plus.google.com/112916219338292742137/posts/boFjiQNiMAz
FastLED v3.0: One more thing…
Beat generators that generate sine waves (and sawtooth waves) at a BPM you specify. Try this:
#define BPM 60
#define DIMMEST 128
#define BRIGHTEST 255
void loop()
{
// Put something visible on the LEDs
static uint16_t hue16 = 0;
hue16 += 9;
fill_rainbow( leds, NUM_LEDS, hue16 / 256, 3);
// set the brightness to a sine wave that moves with a beat
uint8_t bright = beatsin8( BPM, DIMMEST, BRIGHTEST);
FastLED.setBrightness( bright );
FastLED.show();
}
Docs are coming, but check lib8tion.h for beat8, beat16, beatsin8, and beatsin16. Enjoy!
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Ooooo, this is so much fun, I get such a greater range of randomized hue’s this way:
byte BEAT_3 = beatsin8( 6, 0, 255);
byte BEAT_4 = beatsin8( 2, 0, 255);
average = (BEAT_3 + BEAT_4) / 2;And do start getting more of the possible range of colors, I vary the saturation and brightness of the CHSV assignment:brightness= beatsin8( 3, 185, 255);
saturation= beatsin8( 6, 200, 255);leds[i] = CHSV(average , saturation, brightness);
Oct 30, 2014
I’m sort of a beginner trying to use Fastled 3.1
1) I connected a pot to vary the bpm of a fade in / out effect. The pot helps me beat-match to any music manually. However as with standard dj’ing cases I also need a button to reset the timer. Think of it as the play button of cd-dj’s. It will re-start my sine beat at the exact top. The bpm wont change though.
I read your #define USE_GET_MILLISECOND_TIMER 1 however still not clear. Cannot get my head to wrap around the details and uses of the timing. Do you have any sources I can read on this? or do you have a code example?
So far I have:
////
#define USE_GET_MILLISECOND_TIMER 1
uint32_t resetTime;
const int buttonPin = 7;
void setup() {
pinMode(buttonPin, INPUT);
uint32_t get_millisecond_timer()
{
return millis();
}
void loop(){
buttonState = digitalRead(buttonPin);
if (buttonState == HIGH) {
resetTime = millis() ;
}
////2) I’m still researching this one but the leds flicker as I change the pot. Is there a way to prevent this flickering, I tried using a capacitor but didnt seem to help.
Aug 10, 2015
Change your
get_millisecond_timer to return millis() – resetTime and try that!Aug 10, 2015-
that halted the entire strip at max brightness interestingly. Here is my entire code: http://pastie.org/10342234Aug 10, 2015
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You sure that HIGH means Pressed, the way you have it wired? Does the strip run if you hold the button?Aug 10, 2015
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turgan s+1Ok now it worked! With a linear pot and a (play) button its basically a dj / vj controller now. Thanks! My final code is here:123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109//TGAN SIFIRLAMA DUGMESI#define USE_GET_MILLISECOND_TIMER 1//TGAN SIFIRLAMA DUGMESI#include "FastLED.h" // FastLED library. Please use the latest development version.#if FASTLED_VERSION < 3001000#error "Requires FastLED 3.1 or later; check github for latest code."#endif// Fixed definitions cannot change on the fly.#define LED_DT 2 // Data pin to connect to the strip.//#define LED_CK 11 // Clock pin for WS2801 or APA102.#define COLOR_ORDER GRB // It's GRB for WS2812 and GBR for APA102.#define LED_TYPE WS2812B // Using APA102, WS2812, WS2801. Don't forget to change LEDS.addLeds.#define NUM_LEDS 300 // Number of LED's.// Global variables can be changed on the fly.uint8_t max_bright = 128; // Overall brightness definition. It can be changed on the fly.// TGAN Potentiometer VALUEint potPin = A0;int potValue = 0;int PotMappedOutputValue = 30;// TGAN Potentiometer//TGAN SIFIRLAMA DUGMESIconst int buttonPin = 50;int buttonState = 0;//TGAN SIFIRLAMA DUGMESIstruct CRGB leds[NUM_LEDS]; // Initialize our LED array.// Colours defined for belowlong firstval = 0xff00ff;CRGB rgbval(50,0,500);CHSV hsvval(150,255,200);uint8_t startpos = 0;//TGAN SIFIRLAMA DUGMESIuint32_t resetTime;//TGAN SIFIRLAMA DUGMESIint endpos = NUM_LEDS-1;uint8_t thishue = 0;uint8_t deltahue = 15;void setup() {//TGAN SIFIRLAMA DUGMESIpinMode(buttonPin, INPUT);//TGAN SIFIRLAMA DUGMESIdelay(1000); // Power-up safety delay.Serial.begin(57600); // Initialize serial port for debugging.LEDS.addLeds<LED_TYPE, LED_DT, COLOR_ORDER>(leds, NUM_LEDS); // Use this for WS2812FastLED.setBrightness(max_bright);set_max_power_in_volts_and_milliamps(5, 500); // FastLED Power management set at 5V, 500mA.} // setup()////BPM CODE //////#define BPM 125// TGAN Potentiometer//#define BPM outputValue// TGAN Potentiometer#define DIMMEST 2#define BRIGHTEST 255///// BPM CODE END ////uint32_t get_millisecond_timer(){return millis()-resetTime ;}//TGAN SIFIRLAMA DUGMESIvoid loop () { // Several different ways to fill the strand with a solid colour.buttonState = digitalRead(buttonPin);if (buttonState == HIGH) {resetTime = millis() ;} ;potValue = analogRead(potPin);PotMappedOutputValue = map(potValue, 0, 1023, 40, 145);Serial.println(potValue);////BPM CODE ////// Put something visible on the LEDsstatic uint16_t hue16 = 0;hue16 += 9;fill_rainbow( leds, NUM_LEDS, hue16 / 256, 3);// set the brightness to a sine wave that moves with a beatuint8_t bright = beatsin8(PotMappedOutputValue, DIMMEST, BRIGHTEST);FastLED.setBrightness( bright );FastLED.show();///// BPM CODE END ////show_at_max_brightness_for_power(); // Power managed display} // loop()