The front panel of BPI:bit is 1600W color LED-WS2812, that is to say, we can play a lot of tricks behind us.
This time to play a simple point. The key is used to control the brightness and extinction of LED.
Press the ammonium button
Unpress the ammonium button
The code is as follows
#include <Arduino.h>
#include <NeoPixelBus.h>
#define LEDC_CHANNEL_0 0
#define LEDC_TIMER_13_BIT 13
#define LEDC_BASE_FREQ 4500
const uint16_t PixelCount = 25;
const uint8_t PixelPin = 4;
#define colorSaturation 128
#define delay_ms 500
NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
RgbColor red(colorSaturation, 0, 0);
RgbColor green(0, colorSaturation, 0);
RgbColor blue(0, 0, colorSaturation);
RgbColor white(colorSaturation);
RgbColor black(0);
RgbColor num1(0.8 * colorSaturation, 0, 0.2 * colorSaturation);
RgbColor num2(0.5 * colorSaturation, 0, 0.5 * colorSaturation);
RgbColor num3(0.25 * colorSaturation, 0, 0.75 * colorSaturation);
HslColor hslRed(red);
HslColor hslGreen(green);
HslColor hslBlue(blue);
HslColor hslWhite(white);
HslColor hslBlack(black);
#define ledPower 2
#define BottomA 35
#define BottomB 27
void ledcAnalogWrite(uint8_t channel, uint32_t value)
{
// calculate duty, 8191 from 2 ^ 13 - 1 (2 ^ LEDC_TIMER_13_BIT - 1)
//value_MAX = 255
uint32_t duty = (8191 / 255) * value;
// write duty to LEDC
ledcWrite(channel, duty);
}
void setup()
{
Serial.begin(115200); //Serial Port Config 115200-8-N-1
while (!Serial)
; // wait for serial attach
Serial.println();
Serial.println("Initializing...");
Serial.flush();
// this resets all the neopixels to an off state
strip.Begin();
strip.Show();
pinMode(ledPower,OUTPUT);
pinMode(BottomA, INPUT);
pinMode(BottomB, INPUT);
digitalWrite(ledPower, HIGH);
// strip.SetPixelColor(10, blue);
// strip.SetPixelColor(11, blue);
// strip.SetPixelColor(12, blue);
// strip.SetPixelColor(13, blue);
// strip.SetPixelColor(14, red);
// strip.Show();
// delay(1000);
// int i;
// for (i = 0; i <= PixelCount - 1; i++)
// {
// strip.SetPixelColor(i, black);
// strip.Show();
// }
}
void loop()
{
if (digitalRead(BottomA) == LOW)
{
delay(10);
if (digitalRead(BottomA) == LOW)
{
strip.SetPixelColor(16, num1);
strip.SetPixelColor( 7, num2);
strip.SetPixelColor(18, num3);
strip.Show();
}
else
{
int i;
Serial.println("Turn Off");
for (i = 0; i <= PixelCount - 1; i++)
{
strip.SetPixelColor(i, hslBlack);
strip.Show();
}
}
}
}
Press three lights and loose and go out，github url