Working version

Makefile

@@ -10,7 +10,7 @@ SRC       = $(wildcard *.c)
 OUTPUTS   = .hex .bin _eeprom.hex _eeprom.bin
 
 CFLAGS  = -Os -g -Wall -mmcu=$(MCU_TARGET)
-CFLAGS += -pipe -MMD -MP -MG -MF $(BUILD_DIR)/$(*D)/$(*F).d
+CFLAGS += -pipe -MMD -MP -MF $(BUILD_DIR)/$(*D)/$(*F).d
 LDFLAGS = -Wl,-Map,$(BUILD_DIR)/$(*D)/$(*F).map,--cref
 
 CC      = avr-gcc

democode.c

@@ -23,9 +23,8 @@
 #include "rgb16mpm.h"
 
 struct dm001data {
+    uint8_t color;
     uint8_t pos;
-    uint16_t ramp;
-    uint8_t decay[16][3];
 };
 
 struct dm002data {
@@ -33,6 +32,12 @@ struct dm002data {
 };
 
 struct dm003data {
+    uint8_t pos;
+    uint16_t ramp;
+    uint8_t decay[16][3];
+};
+
+struct dm004data {
     uint8_t step;
     uint8_t pos[3];
 };
@@ -41,6 +46,7 @@ union demodata {
     struct dm001data dm001;
     struct dm002data dm002;
     struct dm003data dm003;
+    struct dm004data dm004;
 };
 
 static union demodata demo;
@@ -55,18 +61,28 @@ static uint16_t demomode001(void)
     struct dm001data *dm = &demo.dm001;
 
     dm->pos = sequence_chase(dm->pos, nvram_data.channels);
+
     uint8_t pos = dm->pos & POS_MASK;
-    dm->ramp = color_ramp(dm->ramp +8, chan_value[pos]);
-    color_div(chan_value[pos], 4, dm->decay[pos]);
 
     uint8_t chan;
     for (chan = 0; chan < 16; chan++) {
         if (chan != pos) {
-            color_sub(chan_value[chan], dm->decay[chan], chan_value[chan]);
+            chan_value[chan][COLOR_RED]   = 0x00;
+            chan_value[chan][COLOR_GREEN] = 0x00;
+            chan_value[chan][COLOR_BLUE]  = 0x00;
+        } else {
+            chan_value[chan][dm->color]   = 0xFF;
         }
     }
 
-    return 50;
+    if (pos == 0) {
+        dm->color++;
+        if (dm->color == 3) {
+            dm->color = 0;
+        }
+    }
+
+    return 250;
 }
 
 static uint16_t demomode002(void)
@@ -83,13 +99,32 @@ static uint16_t demomode002(void)
         chan_value[chan][COLOR_BLUE]   = color[COLOR_BLUE];
     }
 
-    return 0;
+    return 50;
 }
 
 static uint16_t demomode003(void)
 {
     struct dm003data *dm = &demo.dm003;
 
+    dm->pos  = sequence_chase(dm->pos, nvram_data.channels);
+    uint8_t pos = dm->pos & POS_MASK;
+    dm->ramp = color_ramp(dm->ramp +8, chan_value[pos]);
+    color_div(chan_value[pos], 8, dm->decay[pos]);
+
+    uint8_t chan;
+    for (chan = 0; chan < 16; chan++) {
+        if (chan != pos) {
+            color_sub(chan_value[chan], dm->decay[chan], chan_value[chan]);
+        }
+    }
+
+    return 50;
+}
+
+static uint16_t demomode004(void)
+{
+    struct dm004data *dm = &demo.dm004;
+
     uint8_t color;
 
     dm->step++;
@@ -132,8 +167,6 @@ void demomode_init(uint8_t mode)
             break;
 
         case 0x01:
-            /* rgb chase */
-            demo.dm001.pos = DIR_UP | 0;
             demomode_run = demomode001;
             break;
 
@@ -143,13 +176,19 @@ void demomode_init(uint8_t mode)
             break;
 
         case 0x03:
-            /* three color chaser */
+            /* rgb chase */
-            demo.dm003.pos[COLOR_RED]   = DIR_UP | 0;
+            demo.dm003.pos = DIR_UP | 0;
-            demo.dm003.pos[COLOR_GREEN] = DIR_UP | 9;
-            demo.dm003.pos[COLOR_BLUE]  = DIR_DOWN | 9;
             demomode_run = demomode003;
             break;
 
+        case 0x04:
+            /* three color chaser */
+            demo.dm004.pos[COLOR_RED]   = DIR_UP | 0;
+            demo.dm004.pos[COLOR_GREEN] = DIR_UP | 9;
+            demo.dm004.pos[COLOR_BLUE]  = DIR_DOWN | 9;
+            demomode_run = demomode004;
+            break;
+
         default:
             /* stay black */
             demomode_run = demomode000;

rgb16mpm.h

@@ -37,13 +37,13 @@ struct _nvdata {
 };
 
 #define NVRAM_DEFAULTS {\
-    .channels = 0x1F1F, \
+    .channels = 0xFFFF, \
     .initialRGB = { { 0xFF, 0x00, 0x00 }, { 0xFF, 0x80, 0x00 }, { 0xFF, 0xFF, 0x00 }, { 0x80, 0xFF, 0x00 }, \
                     { 0x00, 0xFF, 0x00 }, { 0x00, 0xFF, 0x80 }, { 0x00, 0xFF, 0xFF }, { 0x00, 0x80, 0xFF }, \
                     { 0x00, 0x00, 0xFF }, { 0x80, 0x00, 0xFF }, { 0xFF, 0x00, 0xFF }, { 0xFF, 0x00, 0x80 }, \
                     { 0x20, 0x20, 0x20 }, { 0x40, 0x40, 0x40 }, { 0x80, 0x80, 0x80 }, { 0xFF, 0xFF, 0xFF } \
                   }, \
-    .demomode = 0x03, \
+    .demomode = 0x04, \
 };
 
 /* eeprom.c vars */