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1 | // Simple bluetooth connected notification LED | |
2 | // Written by Djhg2000 for http://boards.openpandora.org/ | |
3 | // Connect serial port, then use with the following command: | |
4 | // zenity --color-selection | sed 's/#/$/' > /dev/rfcomm0 | |
5 | ||
6 | #include <Adafruit_NeoPixel.h> | |
7 | ||
8 | #define LPIN 4 // Pin for NeoPixel communication | |
9 | #define PIXELS 8 // Number of LEDs (NeoPixels) | |
10 | ||
11 | ||
12 | - | Adafruit_NeoPixel leds = Adafruit_NeoPixel(PIXELS, LPIN, |
12 | + | Adafruit_NeoPixel leds = Adafruit_NeoPixel(PIXELS, LPIN, NEO_GRB + NEO_KHZ800); |
13 | - | NEO_GRB + NEO_KHZ800); |
13 | + | |
14 | uint8_t color_green = 1; | |
15 | uint8_t color_blue = 1; | |
16 | uint8_t fade = 1; | |
17 | long set_timer = millis(); | |
18 | ||
19 | void setup() | |
20 | { | |
21 | // Initialize communications, nothing too fancy | |
22 | Serial1.begin(9600); | |
23 | leds.begin(); | |
24 | } | |
25 | ||
26 | void loop() | |
27 | { | |
28 | // Generate color information and push it to the LED array | |
29 | for (int i = 0; i < PIXELS; i++) | |
30 | { | |
31 | - | leds.setPixelColor(i, leds.Color(color_red, |
31 | + | leds.setPixelColor(i,leds.Color(map(color_red, 0, 255, 0, fade), |
32 | - | color_green, |
32 | + | map(color_green, 0, 255, 0, fade), |
33 | - | color_blue)); |
33 | + | map(color_blue, 0, 255, 0, fade))); |
34 | } | |
35 | ||
36 | leds.show(); | |
37 | ||
38 | // Try to read the color header, as in the '#' in #ABCDEF | |
39 | - | // Returns -1 if there's no new character |
39 | + | // Serial1.read() returns -1 if there's no new character |
40 | char header = Serial1.read(); | |
41 | ||
42 | // I split this into two separate parsers since Zenity outputs | |
43 | // 48 bit colors | |
44 | // Run Zenity with a pipe to " sed 's/#/$/' " and the rest | |
45 | // should work just fine | |
46 | if (header == '#') | |
47 | { | |
48 | // This is for 24 bit color in HEX, like #ABCDEF | |
49 | char color_ascii24[6]; | |
50 | for (int i = 0; i < 6; i++) | |
51 | { | |
52 | color_ascii24[i] = Serial1_readSafe(); | |
53 | } | |
54 | ||
55 | // Now convert the HEX string into a format NeoPixels understand | |
56 | color_red = hex2integer(2, &color_ascii24[0]); | |
57 | color_green = hex2integer(2, &color_ascii24[2]); | |
58 | color_blue = hex2integer(2, &color_ascii24[4]); | |
59 | ||
60 | set_timer = millis(); | |
61 | fade = 255; | |
62 | } | |
63 | if (header == '$') | |
64 | { | |
65 | // This is for 48 bit color in HEX, like $ABABCDCDEFEF | |
66 | // Basically this is for passing colors from Zenity as | |
67 | // explained above | |
68 | char color_ascii48[12]; | |
69 | for (int i = 0; i < 12; i++) | |
70 | { | |
71 | color_ascii48[i] = Serial1_readSafe(); | |
72 | } | |
73 | ||
74 | // Now convert the HEX string into a format NeoPixels understand | |
75 | color_red = hex2integer(2, &color_ascii48[0]); | |
76 | color_green = hex2integer(2, &color_ascii48[4]); | |
77 | color_blue = hex2integer(2, &color_ascii48[8]); | |
78 | ||
79 | set_timer = millis(); | |
80 | fade = 255; | |
81 | - | // Fade to black after 100 milliseconds since last change |
81 | + | |
82 | - | if (millis() > (set_timer + 100)) |
82 | + | |
83 | // Fade to black after 5 milliseconds since last change | |
84 | - | color_red /= 2; |
84 | + | if (millis() > (set_timer + 5)) |
85 | - | color_green /= 2; |
85 | + | |
86 | - | color_blue /= 2; |
86 | + | if (fade > 0) |
87 | { | |
88 | fade--; | |
89 | } | |
90 | set_timer = millis(); | |
91 | } | |
92 | } | |
93 | ||
94 | // Does the waiting secuence for us, or put simply: | |
95 | // one call always returns one char of input | |
96 | char Serial1_readSafe() | |
97 | { | |
98 | while (Serial1.available() == 0); | |
99 | return Serial1.read(); | |
100 | } | |
101 | ||
102 | // strtoul() seemed like a bit of overkill | |
103 | // No need to import the entire string facility for only one | |
104 | // relatively simple function | |
105 | int hex2integer(int characters, char *hex) | |
106 | { | |
107 | int integer = 0; | |
108 | ||
109 | for (int i = 0; i < characters; i++) | |
110 | { | |
111 | // Shift the veriable integer 4 bits to the left | |
112 | // This is to make room for the next hexadecimal | |
113 | // As a side effect, unrecognized characters are replaced with 0 | |
114 | integer = integer << 4; | |
115 | ||
116 | // Match known good values and add those to our integer | |
117 | if ((hex[i] >= '0') && (hex[i] <= '9')) | |
118 | { | |
119 | integer += hex[i] - '0'; | |
120 | } | |
121 | else if ((hex[i] >= 'a') && (hex[i] <= 'f')) | |
122 | { | |
123 | integer += 10 + (hex[i] - 'a'); | |
124 | } | |
125 | else if ((hex[i] >= 'A') && (hex[i] <= 'F')) | |
126 | { | |
127 | integer += 10 + (hex[i] - 'A'); | |
128 | } | |
129 | // If we get here without a match the character will be ignored | |
130 | // as explained above | |
131 | } | |
132 | ||
133 | return integer; | |
134 | } |