Initial commit

bikeled.ino

@@ -0,0 +1,91 @@
+#include "FastLED.h"
+
+#define NUMBER_LEDS 60
+#define STRIP_PIN 6
+
+#define USE_SECOND_HALL 1
+
+CRGB leds[NUMBER_LEDS];
+
+// speed in rounds-per-millisecond
+volatile float rpms = 0;
+
+volatile unsigned long current_mus = 0;
+volatile unsigned long current_loop_mus = 0;
+volatile unsigned long last_mus = 0;
+volatile unsigned long revolution_startmus = 0;
+volatile byte current_pos = 0;
+byte offset = 0;
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Started.");
+  attachInterrupt(digitalPinToInterrupt(2), magnet_detect, RISING);//Initialize the intterrupt pin (Arduino digital pin 2)
+#ifdef USE_SECOND_HALL
+  attachInterrupt(digitalPinToInterrupt(3), magnet_detect2, RISING);
+#endif
+  FastLED.addLeds<WS2812B, STRIP_PIN, GRB>(leds, NUMBER_LEDS).setCorrection( TypicalLEDStrip );
+  showPosition();
+}
+
+void loop() {
+  current_loop_mus = micros();
+  if((current_loop_mus - revolution_startmus) > 1000000) {
+    revolution_startmus = current_loop_mus;
+    rpms = 0;
+    offset = current_pos;
+  }
+
+  current_pos = (int)((((float)(current_loop_mus - revolution_startmus)) / 1000.0) * rpms * NUMBER_LEDS + offset) % NUMBER_LEDS;
+  showPosition();
+  FastLED.delay(50);
+}
+
+void showPosition() {
+  // show the led at position pos (NUMBER_LEDS must be < 256)!
+  for (int i = 0; i < NUMBER_LEDS; i++) {
+    leds[i] = CRGB::Black;
+  }
+  byte next = (current_pos + 1) % NUMBER_LEDS;
+  byte prev = (current_pos -1)%NUMBER_LEDS;
+  leds[current_pos] = CRGB::White;;
+  leds[current_pos].fadeLightBy(32);
+  leds[next] = CRGB::DarkOrange;
+  leds[next].fadeLightBy(128);
+  leds[prev] = CRGB::DarkOrange;
+  leds[prev].fadeLightBy(128);
+  FastLED.show();
+}
+
+void magnet_detect()//This function is called whenever a magnet/interrupt is detected by the arduino
+ {
+   Serial.println("detect");
+   current_mus = micros();
+ #ifndef USE_SECOND_HALL
+   rpms = 1000.0 / (float)(current_mus - revolution_startmus );
+ #else
+ // half revolutions
+   rpms = 500.0 / (float)(current_mus - revolution_startmus );
+ #endif
+   Serial.println(rpms, DEC);
+   revolution_startmus = current_mus;
+   current_pos = 0;
+   offset = 0;
+   //showPosition();
+ }
+
+ #ifdef USE_SECOND_HALL
+void magnet_detect2()//This function is called whenever a magnet/interrupt is detected by the arduino
+ {
+   Serial.println("detect");
+   current_mus = micros();
+ // half revolutions
+   rpms = 500.0 / (float)(current_mus - revolution_startmus );
+   Serial.println(rpms, DEC);
+   revolution_startmus = current_mus;
+   //current_pos = 0;
+   //offset = 0;
+   //showPosition();
+ }
+ #endif
+