233 lines
4.9 KiB
C++
233 lines
4.9 KiB
C++
#include <NeoPixelBus.h>
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#define DOUBLE_SIDE 0
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#define DOUBLE_SIDE_MIRROR 0
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#define IMAGE_HEIGHT (7)
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#define IMAGE_WIDTH (48)
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#define N_ROT_SLICES (48)
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#define WS_PIN (8)
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#define WS_VCC (9)
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#define WS_GND (7)
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#define HALL_PIN (2)
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static const RgbColor off(0,0,0);
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#if DOUBLE_SIDE
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#define WS_PIXEL_COUNT (2*IMAGE_HEIGHT)
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#else
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#define WS_PIXEL_COUNT (IMAGE_HEIGHT)
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#endif
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#define IMAGE_FAIRYDUST
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//#define IMAGE_CYBER
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#ifdef IMAGE_CYBER
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#define SKEW_RATE (0)
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static const __restrict__ RgbColor PALETTE[] = {
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RgbColor(0,0,0), // black
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RgbColor(20,20,0) // yellow
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};
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static const __restrict__ uint8_t IMAGE[IMAGE_WIDTH][IMAGE_HEIGHT] = {
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,0,1,0,0,1},
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{1,0,1,0,1,1,1},
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{1,0,0,0,0,0,1},
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{1,1,1,1,1,1,1},
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{1,0,1,0,1,0,1},
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{1,0,1,0,1,0,1},
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{1,0,0,0,0,0,1},
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{1,1,1,1,1,1,1},
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{1,1,0,1,0,1,1},
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{1,0,1,0,1,0,1},
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{1,0,0,0,0,0,1},
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{1,1,1,1,1,1,1},
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{1,0,0,1,1,1,1},
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{1,1,1,0,0,0,1},
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{1,0,0,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,0,1,1,1,0,1},
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{1,0,1,1,1,0,1},
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{1,1,0,0,0,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1},
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{1,1,1,1,1,1,1}
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};
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#elif defined(IMAGE_FAIRYDUST)
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#define SKEW_RATE (100)
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static const RgbColor PALETTE[] = {
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RgbColor(0,0,0), // black
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RgbColor(0,128,0), // green
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RgbColor(255,180,0), // orange
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RgbColor(255,0,0) // red
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};
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static const __restrict__ uint8_t IMAGE[IMAGE_WIDTH][IMAGE_HEIGHT] = {
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,1,0,0,0},
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{0,0,1,2,1,0,0},
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{0,1,2,1,1,1,0},
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{0,1,2,1,1,1,0},
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{1,2,2,2,1,1,1},
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{1,2,2,2,1,1,1},
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{0,1,2,1,1,1,0},
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{0,1,2,1,1,1,0},
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{0,0,1,2,1,0,0},
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{0,1,0,1,0,1,0},
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{1,1,0,3,0,1,1},
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{1,1,3,3,3,1,1},
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{1,0,3,3,3,0,1},
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{0,0,0,3,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0},
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{0,0,0,0,0,0,0}
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};
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#endif
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static NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> ws2812(WS_PIXEL_COUNT, WS_PIN);
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static volatile uint32_t last_hall = 0UL;
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static volatile uint32_t last_hall_diff = 1000UL;
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#if SKEW_RATE
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static uint16_t skew = 0U;
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static uint32_t last_skew = 0UL;
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#endif
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void update_hall_timestamp() {
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uint32_t now = millis();
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last_hall_diff = now - last_hall;
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last_hall = now;
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}
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void setup() {
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// Setup output pins
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pinMode(WS_PIN, OUTPUT);
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pinMode(HALL_PIN, INPUT);
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// Setup power supply for WS2812 strip
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// (Yes, I know I shouldn't supply power from the Arduino I/O pins,
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// but I'm running the LEDs at a fraction of their max power draw)
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pinMode(WS_VCC, OUTPUT);
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pinMode(WS_GND, OUTPUT);
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digitalWrite(WS_VCC, HIGH);
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digitalWrite(WS_GND, LOW);
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// Setup WS2812 strup
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ws2812.Begin();
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ws2812.Show();
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// Setup hall sensor interrupt
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attachInterrupt(
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digitalPinToInterrupt(HALL_PIN),
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update_hall_timestamp,
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FALLING
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);
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}
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void loop() {
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// Get the current time
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uint32_t now = millis();
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// Turn the LEDs off if no sensor input was received for 3s
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if ((now - last_hall) > 3000UL) {
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for (size_t i = 0; i < IMAGE_HEIGHT; ++i) {
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ws2812.SetPixelColor(i, off);
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#if DOUBLE_SIDE
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ws2812.SetPixelColor(IMAGE_HEIGHT + i, off);
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#endif
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}
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ws2812.Show();
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// Only re-check after a second
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delay(1000);
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return;
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}
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// Get the slice to show at the current time, based on the time between the last two sensor events
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uint16_t slice = (uint16_t) (((now - last_hall) * N_ROT_SLICES / last_hall_diff) % N_ROT_SLICES);
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#if SKEW_RATE
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// Increment the skew offset when it's time for the next skew step
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if (now - last_skew > SKEW_RATE) {
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skew = (skew + 1) % N_ROT_SLICES;
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last_skew = now;
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}
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// Add the current skew offset to the slice index
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slice = (uint16_t) ((slice + skew) % N_ROT_SLICES);
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#endif
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// Display the current slice (row) of the image
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for (size_t i = 0; i < IMAGE_HEIGHT; ++i) {
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ws2812.SetPixelColor(i, PALETTE[IMAGE[slice][i]]);
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#if DOUBLE_SIDE
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#if DOUBLE_SIDE_MIRROR
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ws2812.SetPixelColor(IMAGE_HEIGHT+i, PALETTE[IMAGE[N_ROT_SLICES-slice][i]]);
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#else
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ws2812.SetPixelColor(IMAGE_HEIGHT+i, PALETTE[IMAGE[slice][i]]);
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#endif
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#endif
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}
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ws2812.Show();
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}
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