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[Hua Diao Experience] 19 Hezhou ESP32_C3 lights up WS2812B hard screen
experimental program three: test use of the WHITE channel of 256-bit display RGBW
/*
【花雕体验】19 合宙ESP32_C3点亮WS2812B硬屏
实验程序三：256位显示 RGBW 的 WHITE 通道的测试使用
*/
#include <Adafruit_NeoPixel.h>
#define LED_PIN 9
#define LED_COUNT 256
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRBW + NEO_KHZ800);
void setup() {
strip.setBrightness(30);
strip.begin();
strip.show();
}
void loop() {
// Fill along the length of the strip in various colors...
colorWipe(strip.Color(255, 0, 0) , 50); // Red
colorWipe(strip.Color( 0, 255, 0) , 50); // Green
colorWipe(strip.Color( 0, 0, 255) , 50); // Blue
colorWipe(strip.Color( 0, 0, 0, 255), 50); // True white (not RGB white)
whiteOverRainbow(75, 5);
pulseWhite(5);
rainbowFade2White(3, 3, 1);
}
// Fill strip pixels one after another with a color. Strip is NOT cleared
// first; anything there will be covered pixel by pixel. Pass in color
// (as a single 'packed' 32-bit value, which you can get by calling
// strip.Color(red, green, blue) as shown in the loop() function above),
// and a delay time (in milliseconds) between pixels.
void colorWipe(uint32_t color, int wait) {
for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
strip.setPixelColor(i, color); // Set pixel's color (in RAM)
strip.show(); // Update strip to match
delay(wait); // Pause for a moment
}
}
void whiteOverRainbow(int whiteSpeed, int whiteLength) {
if (whiteLength >= strip.numPixels()) whiteLength = strip.numPixels() - 1;
int head = whiteLength - 1;
int tail = 0;
int loops = 3;
int loopNum = 0;
uint32_t lastTime = millis();
uint32_t firstPixelHue = 0;
for (;;) { // Repeat forever (or until a 'break' or 'return')
for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
if (((i >= tail) && (i <= head)) || // If between head & tail...
((tail > head) && ((i >= tail) || (i <= head)))) {
strip.setPixelColor(i, strip.Color(0, 0, 0, 255)); // Set white
} else { // else set rainbow
int pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());
strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue)));
}
}
strip.show(); // Update strip with new contents
// There's no delay here, it just runs full-tilt until the timer and
// counter combination below runs out.
firstPixelHue += 40; // Advance just a little along the color wheel
if ((millis() - lastTime) > whiteSpeed) { // Time to update head/tail?
if (++head >= strip.numPixels()) { // Advance head, wrap around
head = 0;
if (++loopNum >= loops) return;
}
if (++tail >= strip.numPixels()) { // Advance tail, wrap around
tail = 0;
}
lastTime = millis(); // Save time of last movement
}
}
}
void pulseWhite(uint8_t wait) {
for (int j = 0; j < 256; j++) { // Ramp up from 0 to 255
// Fill entire strip with white at gamma-corrected brightness level 'j':
strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));
strip.show();
delay(wait);
}
for (int j = 255; j >= 0; j--) { // Ramp down from 255 to 0
strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));
strip.show();
delay(wait);
}
}
void rainbowFade2White(int wait, int rainbowLoops, int whiteLoops) {
int fadeVal = 0, fadeMax = 100;
// Hue of first pixel runs 'rainbowLoops' complete loops through the color
// wheel. Color wheel has a range of 65536 but it's OK if we roll over, so
// just count from 0 to rainbowLoops*65536, using steps of 256 so we
// advance around the wheel at a decent clip.
for (uint32_t firstPixelHue = 0; firstPixelHue < rainbowLoops * 65536;
firstPixelHue += 256) {
for (int i = 0; i < strip.numPixels(); i++) { // For each pixel in strip...
// Offset pixel hue by an amount to make one full revolution of the
// color wheel (range of 65536) along the length of the strip
// (strip.numPixels() steps):
uint32_t pixelHue = firstPixelHue + (i * 65536L / strip.numPixels());
// strip.ColorHSV() can take 1 or 3 arguments: a hue (0 to 65535) or
// optionally add saturation and value (brightness) (each 0 to 255).
// Here we're using just the three-argument variant, though the
// second value (saturation) is a constant 255.
strip.setPixelColor(i, strip.gamma32(strip.ColorHSV(pixelHue, 255,
255 * fadeVal / fadeMax)));
}
strip.show();
delay(wait);
if (firstPixelHue < 65536) { // First loop,
if (fadeVal < fadeMax) fadeVal++; // fade in
} else if (firstPixelHue >= ((rainbowLoops - 1) * 65536)) { // Last loop,
if (fadeVal > 0) fadeVal--; // fade out
} else {
fadeVal = fadeMax; // Interim loop, make sure fade is at max
}
}
for (int k = 0; k < whiteLoops; k++) {
for (int j = 0; j < 256; j++) { // Ramp up 0 to 255
// Fill entire strip with white at gamma-corrected brightness level 'j':
strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));
strip.show();
}
delay(100); // Pause 1 second
for (int j = 255; j >= 0; j--) { // Ramp down 255 to 0
strip.fill(strip.Color(0, 0, 0, strip.gamma8(j)));
strip.show();
}
}
delay(50); // Pause 1/2 second
}
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变色卡
千斤顶
I also bought a Hezhou C3 at that time, but I haven't played it yet, so I'd like to learn it first.
I collected 8 pieces and kept them for projects and more exchanges.
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