SHOW:
|
|
- or go back to the newest paste.
| 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 | } |