add circle spin fadeout whatever program

fw/HackSpaceCon/src/rgbled.cpp

@@ -9,15 +9,18 @@ tinyNeoPixel rgb = tinyNeoPixel(RGB_COUNT, PIN_PA1, NEO_GRB, rgbled);
 
 
 
+// rgb program prototypes
 uint8_t rgbp_rainbow(uint8_t init);
+uint8_t rgbp_circlefade(uint8_t init);
 
-uint8_t (*rgb_program[1])(uint8_t) = {
-    rgbp_rainbow
+// rgb program function pointer array
+uint8_t (*rgb_program[PROG_COUNT])(uint8_t) = {
+    rgbp_rainbow,
+    rgbp_circlefade
 };
 
 
 
-#define RGB_COUNT	5
 uint8_t rgbled[3 * RGB_COUNT];
 
 
@@ -40,6 +43,8 @@ void conf_rgb_timer()
 
 // globals for all rgb programs
 uint16_t prog_timeout;
+uint16_t hue;
+uint8_t  r, g, b;
 
 
 // rgb program 0: rainbow puke
@@ -53,9 +58,7 @@ uint16_t rainbow_hue = 0;
 
 uint8_t rgbp_rainbow(uint8_t init)
 {
-    uint8_t i;
-    uint8_t r, g, b;
-    uint16_t hue;
+    uint8_t i;    
 
     // set our timer when initializing. otherwise every call is identical
     if (init) {
@@ -89,4 +92,49 @@ uint8_t rgbp_rainbow(uint8_t init)
 
     // done with program
     return 0;
-}
+}
+
+
+// rgb program 2: circle loops with fading
+#define CF_TIMEOUT      90              // how long to show this program (max 255, ideally (20*loopcount)+10)
+#define CF_BRIGHTNESS   64              // how bright to make the LED. don't make too bright or badge will brown out
+#define CF_FADERATE     12              // how much to fade all LEDs each frame
+
+uint8_t circlefade_idx = 0;
+
+uint8_t rgbp_circlefade(uint8_t init)
+{
+    uint8_t i;
+    uint8_t t;
+
+    // set our timer when initializing. otherwise every call is identical
+    if (init) {
+        prog_timeout = CF_TIMEOUT;
+        circlefade_idx = 0;
+    }
+
+    if (--prog_timeout) {
+        t = (uint8_t)(CF_TIMEOUT - prog_timeout);   // get time elapsed
+        t &= 0x3;                                   // light a new LED every 4th loop
+
+        // fade each LED down every cycle
+        for (i = 0; i < (sizeof(rgbled) / sizeof(rgbled[0])); i++) {
+            if (rgbled[i] >= CF_FADERATE) {
+                rgbled[i] -= CF_FADERATE;
+            } else {
+                rgbled[i] = 0;
+            }
+        }
+
+        // set the next LED in sequence on to full brightness every 4 cycles
+        if (prog_timeout >= 10) {                   // as long as >10 loops remain,
+            if (!t) {                               // then on a loop boundary, light the next LED
+                rgb.setPixelColor(circlefade_idx, CF_BRIGHTNESS, CF_BRIGHTNESS, CF_BRIGHTNESS);
+
+                if (++circlefade_idx > RGB_COUNT) { // then work on the next LED in sequence
+                    circlefade_idx = 0;
+                }
+            }
+        }
+    }
+}