Color pixels library using WS2812B and nRF51822
Dependents: BLE_Color_Pixels Grove_Node BLE_HeartRate
Color pixels library using WS2812B and nRF51822 (16Hz)
It's for
- http://www.seeedstudio.com/depot/Digital-RGB-LED-FlexiStrip-60-LED-1-Meter-p-1666.html
- http://www.seeedstudio.com/depot/WS2812B-Digital-RGB-LED-Waterproof-FlexiStrip-144-LEDmeter-2-meter-p-1869.html
- http://www.seeedstudio.com/depot/WS2812B-RGB-LED-with-Integrated-Driver-Chip-10-PCs-pack-p-1675.html
color_pixels.cpp@4:16ef874fa57f, 2015-05-05 (annotated)
- Committer:
- yihui
- Date:
- Tue May 05 05:37:20 2015 +0000
- Revision:
- 4:16ef874fa57f
- Parent:
- 3:91af7b451005
update header file name
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Yihui Xiong | 2:5c805323a2c0 | 1 | /** Color pixels library using WS2812B and nRF51822 (16MHz) |
yihui | 0:1e1ce549ad91 | 2 | * It's for |
yihui | 0:1e1ce549ad91 | 3 | * + http://www.seeedstudio.com/depot/Digital-RGB-LED-FlexiStrip-60-LED-1-Meter-p-1666.html |
yihui | 0:1e1ce549ad91 | 4 | * + http://www.seeedstudio.com/depot/WS2812B-Digital-RGB-LED-Waterproof-FlexiStrip-144-LEDmeter-2-meter-p-1869.html |
yihui | 0:1e1ce549ad91 | 5 | * + http://www.seeedstudio.com/depot/WS2812B-RGB-LED-with-Integrated-Driver-Chip-10-PCs-pack-p-1675.html |
yihui | 0:1e1ce549ad91 | 6 | * |
yihui | 0:1e1ce549ad91 | 7 | * The MIT License (MIT) |
yihui | 0:1e1ce549ad91 | 8 | * |
yihui | 0:1e1ce549ad91 | 9 | * Copyright (c) 2014 Seeed Technology Inc. |
yihui | 0:1e1ce549ad91 | 10 | * |
yihui | 0:1e1ce549ad91 | 11 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
yihui | 0:1e1ce549ad91 | 12 | * of this software and associated documentation files (the "Software"), to deal |
yihui | 0:1e1ce549ad91 | 13 | * in the Software without restriction, including without limitation the rights |
yihui | 0:1e1ce549ad91 | 14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
yihui | 0:1e1ce549ad91 | 15 | * copies of the Software, and to permit persons to whom the Software is |
yihui | 0:1e1ce549ad91 | 16 | * furnished to do so, subject to the following conditions: |
yihui | 0:1e1ce549ad91 | 17 | |
yihui | 0:1e1ce549ad91 | 18 | * The above copyright notice and this permission notice shall be included in |
yihui | 0:1e1ce549ad91 | 19 | * all copies or substantial portions of the Software. |
yihui | 0:1e1ce549ad91 | 20 | |
yihui | 0:1e1ce549ad91 | 21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
yihui | 0:1e1ce549ad91 | 22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
yihui | 0:1e1ce549ad91 | 23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
yihui | 0:1e1ce549ad91 | 24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
yihui | 0:1e1ce549ad91 | 25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
yihui | 0:1e1ce549ad91 | 26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
yihui | 0:1e1ce549ad91 | 27 | * THE SOFTWARE. |
yihui | 0:1e1ce549ad91 | 28 | */ |
yihui | 0:1e1ce549ad91 | 29 | |
yihui | 0:1e1ce549ad91 | 30 | #include "color_pixels.h" |
yihui | 4:16ef874fa57f | 31 | #include "nrf51.h" |
yihui | 4:16ef874fa57f | 32 | #include "nrf51_bitfields.h" |
yihui | 0:1e1ce549ad91 | 33 | |
Yihui Xiong | 2:5c805323a2c0 | 34 | #if !defined ( __GNUC__ ) |
Yihui Xiong | 2:5c805323a2c0 | 35 | // Generate a high level pulse (0.81us) of WS2812B's 1 code (0.9us +- 0.15us) |
yihui | 0:1e1ce549ad91 | 36 | #define COLOR_PIXELS_ONE_HIGH(mask) \ |
yihui | 0:1e1ce549ad91 | 37 | NRF_GPIO->OUTSET = (mask); \ |
yihui | 0:1e1ce549ad91 | 38 | __ASM ( \ |
yihui | 0:1e1ce549ad91 | 39 | " NOP\n\t" \ |
yihui | 0:1e1ce549ad91 | 40 | " NOP\n\t" \ |
yihui | 0:1e1ce549ad91 | 41 | " NOP\n\t" \ |
yihui | 0:1e1ce549ad91 | 42 | " NOP\n\t" \ |
yihui | 0:1e1ce549ad91 | 43 | " NOP\n\t" \ |
yihui | 0:1e1ce549ad91 | 44 | " NOP\n\t" \ |
yihui | 0:1e1ce549ad91 | 45 | " NOP\n\t" \ |
yihui | 0:1e1ce549ad91 | 46 | " NOP\n\t" \ |
yihui | 0:1e1ce549ad91 | 47 | " NOP\n\t" \ |
yihui | 0:1e1ce549ad91 | 48 | ); \ |
yihui | 0:1e1ce549ad91 | 49 | NRF_GPIO->OUTCLR = (mask) |
yihui | 0:1e1ce549ad91 | 50 | |
yihui | 0:1e1ce549ad91 | 51 | // Generate a high level pulse (0.31us) of WS2812B's 0 code (0.35us +- 0.15us) |
yihui | 0:1e1ce549ad91 | 52 | #define COLOR_PIXELS_ZERO_HIGH(mask) \ |
yihui | 0:1e1ce549ad91 | 53 | NRF_GPIO->OUTSET = (mask); \ |
yihui | 0:1e1ce549ad91 | 54 | __ASM ( \ |
yihui | 0:1e1ce549ad91 | 55 | " NOP\n\t" \ |
yihui | 0:1e1ce549ad91 | 56 | ); \ |
Yihui Xiong | 2:5c805323a2c0 | 57 | NRF_GPIO->OUTCLR = (mask); \ |
Yihui Xiong | 2:5c805323a2c0 | 58 | __ASM ( \ |
Yihui Xiong | 2:5c805323a2c0 | 59 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 60 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 61 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 62 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 63 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 64 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 65 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 66 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 67 | ) |
Yihui Xiong | 2:5c805323a2c0 | 68 | #else |
Yihui Xiong | 2:5c805323a2c0 | 69 | // Generate a high level pulse (0.94us) of WS2812B's 1 code (0.9us +- 0.15us) |
Yihui Xiong | 2:5c805323a2c0 | 70 | #define COLOR_PIXELS_ONE_HIGH(mask) \ |
Yihui Xiong | 2:5c805323a2c0 | 71 | NRF_GPIO->OUTSET = (mask); \ |
Yihui Xiong | 2:5c805323a2c0 | 72 | __ASM ( \ |
Yihui Xiong | 2:5c805323a2c0 | 73 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 74 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 75 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 76 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 77 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 78 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 79 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 80 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 81 | ); \ |
yihui | 0:1e1ce549ad91 | 82 | NRF_GPIO->OUTCLR = (mask) |
yihui | 0:1e1ce549ad91 | 83 | |
Yihui Xiong | 2:5c805323a2c0 | 84 | // Generate a high level pulse (0.44us) of WS2812B's 0 code (0.35us +- 0.15us) |
Yihui Xiong | 2:5c805323a2c0 | 85 | #define COLOR_PIXELS_ZERO_HIGH(mask) \ |
Yihui Xiong | 2:5c805323a2c0 | 86 | NRF_GPIO->OUTSET = (mask); \ |
Yihui Xiong | 2:5c805323a2c0 | 87 | __ASM ( \ |
Yihui Xiong | 2:5c805323a2c0 | 88 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 89 | ); \ |
Yihui Xiong | 2:5c805323a2c0 | 90 | NRF_GPIO->OUTCLR = (mask); \ |
Yihui Xiong | 2:5c805323a2c0 | 91 | __ASM ( \ |
Yihui Xiong | 2:5c805323a2c0 | 92 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 93 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 94 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 95 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 96 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 97 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 98 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 99 | " NOP\n\t" \ |
Yihui Xiong | 2:5c805323a2c0 | 100 | ) |
Yihui Xiong | 2:5c805323a2c0 | 101 | #endif |
Yihui Xiong | 2:5c805323a2c0 | 102 | |
yihui | 0:1e1ce549ad91 | 103 | static void delay_us(uint32_t us) |
yihui | 0:1e1ce549ad91 | 104 | { |
yihui | 0:1e1ce549ad91 | 105 | do { |
yihui | 0:1e1ce549ad91 | 106 | __ASM volatile ( |
yihui | 0:1e1ce549ad91 | 107 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 108 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 109 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 110 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 111 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 112 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 113 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 114 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 115 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 116 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 117 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 118 | "NOP\n\t" |
yihui | 0:1e1ce549ad91 | 119 | ); |
yihui | 0:1e1ce549ad91 | 120 | } while (--us); |
yihui | 0:1e1ce549ad91 | 121 | } |
yihui | 0:1e1ce549ad91 | 122 | |
yihui | 0:1e1ce549ad91 | 123 | ColorPixels::ColorPixels(uint8_t pin, uint16_t num) |
yihui | 0:1e1ce549ad91 | 124 | { |
yihui | 0:1e1ce549ad91 | 125 | this->pin = pin; |
yihui | 0:1e1ce549ad91 | 126 | this->num = num; |
yihui | 0:1e1ce549ad91 | 127 | |
yihui | 0:1e1ce549ad91 | 128 | NRF_GPIO->PIN_CNF[pin] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) |
yihui | 0:1e1ce549ad91 | 129 | | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) |
yihui | 0:1e1ce549ad91 | 130 | | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
yihui | 0:1e1ce549ad91 | 131 | | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) |
yihui | 0:1e1ce549ad91 | 132 | | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos); |
yihui | 0:1e1ce549ad91 | 133 | NRF_GPIO->OUTCLR = (1UL << pin); |
yihui | 0:1e1ce549ad91 | 134 | |
Yihui Xiong | 2:5c805323a2c0 | 135 | colors = new grb_t[num]; |
yihui | 0:1e1ce549ad91 | 136 | for (int i = 0; i < num; i++) { |
yihui | 0:1e1ce549ad91 | 137 | colors[i].grb = 0; |
yihui | 0:1e1ce549ad91 | 138 | } |
yihui | 0:1e1ce549ad91 | 139 | } |
yihui | 0:1e1ce549ad91 | 140 | |
yihui | 0:1e1ce549ad91 | 141 | ColorPixels::~ColorPixels() |
yihui | 0:1e1ce549ad91 | 142 | { |
yihui | 0:1e1ce549ad91 | 143 | delete colors; |
yihui | 0:1e1ce549ad91 | 144 | } |
yihui | 0:1e1ce549ad91 | 145 | |
yihui | 0:1e1ce549ad91 | 146 | |
yihui | 0:1e1ce549ad91 | 147 | void ColorPixels::set_color(uint16_t index, uint8_t r, uint8_t g, uint8_t b) |
yihui | 0:1e1ce549ad91 | 148 | { |
yihui | 0:1e1ce549ad91 | 149 | if (index < num) { |
yihui | 0:1e1ce549ad91 | 150 | colors[index].r = r; |
yihui | 0:1e1ce549ad91 | 151 | colors[index].g = g; |
yihui | 0:1e1ce549ad91 | 152 | colors[index].b = b; |
yihui | 0:1e1ce549ad91 | 153 | } |
yihui | 0:1e1ce549ad91 | 154 | } |
yihui | 0:1e1ce549ad91 | 155 | |
Yihui Xiong | 2:5c805323a2c0 | 156 | void ColorPixels::set_color(uint16_t index, uint32_t rgb) { |
Yihui Xiong | 2:5c805323a2c0 | 157 | color_t c = *(color_t *)&rgb; |
Yihui Xiong | 2:5c805323a2c0 | 158 | set_color(index, c.r, c.g, c.b); |
Yihui Xiong | 2:5c805323a2c0 | 159 | } |
Yihui Xiong | 2:5c805323a2c0 | 160 | |
yihui | 3:91af7b451005 | 161 | void ColorPixels::set_all_color(uint8_t r, uint8_t g, uint8_t b) |
yihui | 3:91af7b451005 | 162 | { |
yihui | 3:91af7b451005 | 163 | for (int i = 0; i < num; i++) { |
yihui | 3:91af7b451005 | 164 | colors[i].r = r; |
yihui | 3:91af7b451005 | 165 | colors[i].g = g; |
yihui | 3:91af7b451005 | 166 | colors[i].b = b; |
yihui | 3:91af7b451005 | 167 | } |
yihui | 3:91af7b451005 | 168 | |
yihui | 3:91af7b451005 | 169 | update(); |
yihui | 3:91af7b451005 | 170 | } |
yihui | 3:91af7b451005 | 171 | |
yihui | 0:1e1ce549ad91 | 172 | void ColorPixels::update() |
yihui | 0:1e1ce549ad91 | 173 | { |
yihui | 0:1e1ce549ad91 | 174 | uint32_t mask = 1 << pin; |
yihui | 0:1e1ce549ad91 | 175 | NRF_GPIO->OUTCLR = mask; |
yihui | 0:1e1ce549ad91 | 176 | delay_us(50); |
Yihui Xiong | 2:5c805323a2c0 | 177 | |
Yihui Xiong | 2:5c805323a2c0 | 178 | grb_t *pcolor = colors; |
yihui | 0:1e1ce549ad91 | 179 | for (int i = 0; i < num; i++) { |
Yihui Xiong | 2:5c805323a2c0 | 180 | uint32_t grb = (*pcolor).grb; |
yihui | 0:1e1ce549ad91 | 181 | for (int bit = 0; bit < 24; bit++) { |
Yihui Xiong | 2:5c805323a2c0 | 182 | if (grb & 1) { |
yihui | 0:1e1ce549ad91 | 183 | COLOR_PIXELS_ONE_HIGH(mask); |
yihui | 0:1e1ce549ad91 | 184 | } else { |
yihui | 0:1e1ce549ad91 | 185 | COLOR_PIXELS_ZERO_HIGH(mask); |
yihui | 0:1e1ce549ad91 | 186 | } |
Yihui Xiong | 2:5c805323a2c0 | 187 | grb >>= 1; |
yihui | 0:1e1ce549ad91 | 188 | } |
Yihui Xiong | 2:5c805323a2c0 | 189 | pcolor++; |
yihui | 0:1e1ce549ad91 | 190 | } |
yihui | 0:1e1ce549ad91 | 191 | } |
yihui | 0:1e1ce549ad91 | 192 | |
yihui | 0:1e1ce549ad91 | 193 | void ColorPixels::clear() |
yihui | 0:1e1ce549ad91 | 194 | { |
yihui | 0:1e1ce549ad91 | 195 | for (int i = 0; i < num; i++) { |
yihui | 0:1e1ce549ad91 | 196 | colors[i].grb = 0; |
yihui | 0:1e1ce549ad91 | 197 | } |
yihui | 0:1e1ce549ad91 | 198 | |
yihui | 0:1e1ce549ad91 | 199 | update(); |
yihui | 0:1e1ce549ad91 | 200 | } |
Yihui Xiong | 2:5c805323a2c0 | 201 | |
Yihui Xiong | 2:5c805323a2c0 | 202 | uint32_t toRGB(uint8_t red, uint8_t green, uint8_t blue) |
Yihui Xiong | 2:5c805323a2c0 | 203 | { |
Yihui Xiong | 2:5c805323a2c0 | 204 | color_t c; |
Yihui Xiong | 2:5c805323a2c0 | 205 | |
Yihui Xiong | 2:5c805323a2c0 | 206 | c.r = red; |
Yihui Xiong | 2:5c805323a2c0 | 207 | c.g = green; |
Yihui Xiong | 2:5c805323a2c0 | 208 | c.b = blue; |
Yihui Xiong | 2:5c805323a2c0 | 209 | |
Yihui Xiong | 2:5c805323a2c0 | 210 | return c.rgb; |
Yihui Xiong | 2:5c805323a2c0 | 211 | }; |
Yihui Xiong | 2:5c805323a2c0 | 212 | |
Yihui Xiong | 2:5c805323a2c0 | 213 | uint32_t wheel(float position, uint8_t min = 0, uint8_t max = 255) |
Yihui Xiong | 2:5c805323a2c0 | 214 | { |
Yihui Xiong | 2:5c805323a2c0 | 215 | uint8_t d = max - min; |
Yihui Xiong | 2:5c805323a2c0 | 216 | uint32_t c; |
Yihui Xiong | 2:5c805323a2c0 | 217 | |
Yihui Xiong | 2:5c805323a2c0 | 218 | if(position < 0.166) { |
Yihui Xiong | 2:5c805323a2c0 | 219 | c = toRGB(max, min + position * 6 * d, min); |
Yihui Xiong | 2:5c805323a2c0 | 220 | } else if(position < 0.332) { |
Yihui Xiong | 2:5c805323a2c0 | 221 | position -= 0.166; |
Yihui Xiong | 2:5c805323a2c0 | 222 | c = toRGB(max - position * 6 * d, max, min); |
Yihui Xiong | 2:5c805323a2c0 | 223 | } else if(position < 0.498) { |
Yihui Xiong | 2:5c805323a2c0 | 224 | position -= 0.332; |
Yihui Xiong | 2:5c805323a2c0 | 225 | c = toRGB(min, max, min + position * 6 * d); |
Yihui Xiong | 2:5c805323a2c0 | 226 | } else if(position < 0.664) { |
Yihui Xiong | 2:5c805323a2c0 | 227 | position -= 0.498; |
Yihui Xiong | 2:5c805323a2c0 | 228 | c = toRGB(min, max - position * 6 * d, max); |
Yihui Xiong | 2:5c805323a2c0 | 229 | } else if(position < 0.83) { |
Yihui Xiong | 2:5c805323a2c0 | 230 | position -= 0.664; |
Yihui Xiong | 2:5c805323a2c0 | 231 | c = toRGB(min + d * position * 6, min, max); |
Yihui Xiong | 2:5c805323a2c0 | 232 | } else { |
Yihui Xiong | 2:5c805323a2c0 | 233 | position -= 0.83; |
Yihui Xiong | 2:5c805323a2c0 | 234 | c = toRGB(max, min, max - position * 6 * d); |
Yihui Xiong | 2:5c805323a2c0 | 235 | } |
Yihui Xiong | 2:5c805323a2c0 | 236 | |
Yihui Xiong | 2:5c805323a2c0 | 237 | return c; |
Yihui Xiong | 2:5c805323a2c0 | 238 | } |
Yihui Xiong | 2:5c805323a2c0 | 239 | |
Yihui Xiong | 2:5c805323a2c0 | 240 | void find_wheel_options(uint32_t rgb, float *position, uint8_t *min, uint8_t *max) |
Yihui Xiong | 2:5c805323a2c0 | 241 | { |
Yihui Xiong | 2:5c805323a2c0 | 242 | color_t c; |
Yihui Xiong | 2:5c805323a2c0 | 243 | c.rgb = rgb; |
Yihui Xiong | 2:5c805323a2c0 | 244 | |
Yihui Xiong | 2:5c805323a2c0 | 245 | if (c.r > c.g) { |
Yihui Xiong | 2:5c805323a2c0 | 246 | if (c.g >= c.b) { |
Yihui Xiong | 2:5c805323a2c0 | 247 | *max = c.r; |
Yihui Xiong | 2:5c805323a2c0 | 248 | *min = c.b; |
Yihui Xiong | 2:5c805323a2c0 | 249 | *position = (float)(c.g - c.b) / (c.r - c.b) / 6.0; |
Yihui Xiong | 2:5c805323a2c0 | 250 | } else if (c.b >= c.r) { |
Yihui Xiong | 2:5c805323a2c0 | 251 | *max = c.b; |
Yihui Xiong | 2:5c805323a2c0 | 252 | *min = c.g; |
Yihui Xiong | 2:5c805323a2c0 | 253 | *position = (float)(c.r - c.g) / (c.b - c.g) / 6.0 + 0.664; |
Yihui Xiong | 2:5c805323a2c0 | 254 | } else { |
Yihui Xiong | 2:5c805323a2c0 | 255 | *max = c.r; |
Yihui Xiong | 2:5c805323a2c0 | 256 | *min = c.g; |
Yihui Xiong | 2:5c805323a2c0 | 257 | *position = (float)(c.b - c.g) / (c.r - c.g) / 6.0 + 0.83; |
Yihui Xiong | 2:5c805323a2c0 | 258 | } |
Yihui Xiong | 2:5c805323a2c0 | 259 | } else { |
Yihui Xiong | 2:5c805323a2c0 | 260 | if (c.r > c.b) { |
Yihui Xiong | 2:5c805323a2c0 | 261 | *max = c.g; |
Yihui Xiong | 2:5c805323a2c0 | 262 | *min = c.b; |
Yihui Xiong | 2:5c805323a2c0 | 263 | *position = (float)(c.r - c.b) / (c.g - c.b) / 6.0 + 0.166; |
Yihui Xiong | 2:5c805323a2c0 | 264 | } else if (c.b > c.g) { |
Yihui Xiong | 2:5c805323a2c0 | 265 | *max = c.b; |
Yihui Xiong | 2:5c805323a2c0 | 266 | *min = c.r; |
Yihui Xiong | 2:5c805323a2c0 | 267 | *position = (float)(c.g - c.r) / (c.b - c.r) / 6.0 + 0.498; |
Yihui Xiong | 2:5c805323a2c0 | 268 | } else { |
Yihui Xiong | 2:5c805323a2c0 | 269 | *max = c.g; |
Yihui Xiong | 2:5c805323a2c0 | 270 | *min = c.r; |
Yihui Xiong | 2:5c805323a2c0 | 271 | *position = (float)(c.b - c.r) / (c.g - c.r) / 6.0 + 0.332; |
Yihui Xiong | 2:5c805323a2c0 | 272 | } |
Yihui Xiong | 2:5c805323a2c0 | 273 | } |
Yihui Xiong | 2:5c805323a2c0 | 274 | } |
Yihui Xiong | 2:5c805323a2c0 | 275 | |
Yihui Xiong | 2:5c805323a2c0 | 276 | void ColorPixels::rainbow(uint32_t rgb) |
Yihui Xiong | 2:5c805323a2c0 | 277 | { |
Yihui Xiong | 2:5c805323a2c0 | 278 | float position; |
Yihui Xiong | 2:5c805323a2c0 | 279 | uint8_t min, max; |
Yihui Xiong | 2:5c805323a2c0 | 280 | |
Yihui Xiong | 2:5c805323a2c0 | 281 | find_wheel_options(rgb, &position, &min, &max); |
Yihui Xiong | 2:5c805323a2c0 | 282 | for (int i = 0; i < num; i++) { |
Yihui Xiong | 2:5c805323a2c0 | 283 | float current = ((int)(i + num * position) % num) / (float)num; |
Yihui Xiong | 2:5c805323a2c0 | 284 | set_color(i, wheel(current, min, max)); |
Yihui Xiong | 2:5c805323a2c0 | 285 | } |
Yihui Xiong | 2:5c805323a2c0 | 286 | |
Yihui Xiong | 2:5c805323a2c0 | 287 | update(); |
Yihui Xiong | 2:5c805323a2c0 | 288 | } |
yihui | 3:91af7b451005 | 289 | |
yihui | 3:91af7b451005 | 290 | void ColorPixels::rainbow(uint8_t r, uint8_t g, uint8_t b) |
yihui | 3:91af7b451005 | 291 | { |
yihui | 3:91af7b451005 | 292 | color_t c; |
yihui | 3:91af7b451005 | 293 | |
yihui | 3:91af7b451005 | 294 | c.r = r; |
yihui | 3:91af7b451005 | 295 | c.g = g; |
yihui | 3:91af7b451005 | 296 | c.b = b; |
yihui | 3:91af7b451005 | 297 | |
yihui | 3:91af7b451005 | 298 | rainbow(c.rgb); |
yihui | 3:91af7b451005 | 299 | } |
yihui | 3:91af7b451005 | 300 |