TLIGHT_PRODUCTS / WS281X

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WS281X.cpp@6:5aff0da4b663, 2016-08-01 (annotated)

Committer:
mutech
Date:
Mon Aug 01 08:16:52 2016 +0000
Revision:
6:5aff0da4b663
Parent:
5:8e6835a94e10
Child:
8:0617f524d67d
WS2811/WS2812 Library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mutech 0:dff187a80020 1 /* WS281X.cpp (for LPC82X/STM32F0x/STM32F746xx)
mutech 0:dff187a80020 2 * mbed Microcontroller Library
mutech 0:dff187a80020 3 * Copyright (c) 2016 muetch, t.kuroki, MIT License
mutech 0:dff187a80020 4 *
mutech 0:dff187a80020 5 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
mutech 0:dff187a80020 6 * and associated documentation files (the "Software"), to deal in the Software without restriction,
mutech 0:dff187a80020 7 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
mutech 0:dff187a80020 8 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
mutech 0:dff187a80020 9 * furnished to do so, subject to the following conditions:
mutech 0:dff187a80020 10 *
mutech 0:dff187a80020 11 * The above copyright notice and this permission notice shall be included in all copies or
mutech 0:dff187a80020 12 * substantial portions of the Software.
mutech 0:dff187a80020 13 *
mutech 0:dff187a80020 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
mutech 0:dff187a80020 15 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
mutech 0:dff187a80020 16 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
mutech 0:dff187a80020 17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mutech 0:dff187a80020 18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
mutech 0:dff187a80020 19 */
mutech 0:dff187a80020 20
mutech 0:dff187a80020 21 #include "WS281X.h"
mutech 6:5aff0da4b663 22 #if defined(TARGET_STM)
mutech 0:dff187a80020 23 #include "pinmap.h"
mutech 6:5aff0da4b663 24 #endif
mutech 0:dff187a80020 25
mutech 4:4af895bb2979 26 // TARGET_STM32F7
mutech 0:dff187a80020 27 // TARGET_DISCO_F746NG
mutech 0:dff187a80020 28 // TARGET_NUCLEO_F746ZG
mutech 4:4af895bb2979 29 // TARGET_STM32F0
mutech 0:dff187a80020 30 // TARGET_NUCLEO_F030R8
mutech 0:dff187a80020 31 // TARGET_NUCLEO_F070RB
mutech 4:4af895bb2979 32 // TARGET_LPC82X
mutech 0:dff187a80020 33 // TARGET_LPC824
mutech 0:dff187a80020 34
mutech 0:dff187a80020 35 //----------------------------------------------------------------------------
mutech 0:dff187a80020 36 WS281X::WS281X(PinName wirePin, PinMode pinMode, int numPixels, RGBOrder rgbOrder)
mutech 0:dff187a80020 37 : _wirePin(wirePin), _gpio(), _pixels(0)
mutech 0:dff187a80020 38 {
mutech 0:dff187a80020 39 gpio_init_inout(&_gpio, wirePin, PIN_OUTPUT, pinMode, 0);
mutech 0:dff187a80020 40 #if defined(TARGET_STM)
mutech 0:dff187a80020 41 pin_mode_ex(wirePin, pinMode);
mutech 0:dff187a80020 42 #endif
mutech 0:dff187a80020 43
mutech 0:dff187a80020 44 setRGBOrder(rgbOrder);
mutech 0:dff187a80020 45
mutech 0:dff187a80020 46 if (numPixels < 1)
mutech 0:dff187a80020 47 numPixels = 1;
mutech 0:dff187a80020 48 else if (numPixels > MAX_PIXELS)
mutech 0:dff187a80020 49 numPixels = MAX_PIXELS;
mutech 0:dff187a80020 50 _numPixels = (uint16_t)numPixels;
mutech 0:dff187a80020 51 _pixels = new RGBColor[_numPixels];
mutech 0:dff187a80020 52 _dummyPixel = 0;
mutech 0:dff187a80020 53
mutech 0:dff187a80020 54 clear();
mutech 0:dff187a80020 55 }
mutech 0:dff187a80020 56
mutech 0:dff187a80020 57 WS281X::~WS281X()
mutech 0:dff187a80020 58 {
mutech 0:dff187a80020 59 if (_pixels)
mutech 0:dff187a80020 60 delete[] _pixels;
mutech 0:dff187a80020 61 }
mutech 0:dff187a80020 62
mutech 0:dff187a80020 63 #if defined(TARGET_STM)
mutech 6:5aff0da4b663 64 /**
mutech 6:5aff0da4b663 65 * Configure pin pull-up/pull-down/OpenDrain
mutech 6:5aff0da4b663 66 * typedef enum {
mutech 6:5aff0da4b663 67 * PullNone = 0,
mutech 6:5aff0da4b663 68 * PullUp = 1,
mutech 6:5aff0da4b663 69 * PullDown = 2,
mutech 6:5aff0da4b663 70 * OpenDrain = 3,
mutech 6:5aff0da4b663 71 * PullDefault = PullNone
mutech 6:5aff0da4b663 72 * } PinMode;
mutech 6:5aff0da4b663 73 */
mutech 0:dff187a80020 74 void WS281X::pin_mode_ex(PinName pin, PinMode mode)
mutech 0:dff187a80020 75 {
mutech 6:5aff0da4b663 76 int port_index = STM_PORT(pin);
mutech 6:5aff0da4b663 77 int pin_index = STM_PIN(pin);
mutech 6:5aff0da4b663 78 int offset = pin_index << 1;
mutech 6:5aff0da4b663 79 GPIO_TypeDef * port_reg = ((GPIO_TypeDef *) (GPIOA_BASE + (port_index << 10)));
mutech 6:5aff0da4b663 80
mutech 6:5aff0da4b663 81 // Configure pull-up/pull-down resistors
mutech 6:5aff0da4b663 82 uint32_t pupd = (uint32_t)mode & 3;
mutech 6:5aff0da4b663 83 if (pupd > 2)
mutech 6:5aff0da4b663 84 pupd = 0; // Open-drain = No pull-up/No pull-down
mutech 6:5aff0da4b663 85
mutech 0:dff187a80020 86 if (mode == OpenDrain)
mutech 0:dff187a80020 87 {
mutech 6:5aff0da4b663 88 port_reg->PUPDR &= ~(0x3 << offset); // Open-drain = No pull-up/No pull-down
mutech 6:5aff0da4b663 89 port_reg->OTYPER |= 1 << pin_index;
mutech 0:dff187a80020 90 }
mutech 0:dff187a80020 91 else
mutech 6:5aff0da4b663 92 {
mutech 6:5aff0da4b663 93 port_reg->OTYPER &= ~(1 << pin_index);
mutech 6:5aff0da4b663 94 // pin_mode(pin, mode);
mutech 6:5aff0da4b663 95 port_reg->PUPDR &= ~(0x3 << offset);
mutech 6:5aff0da4b663 96 port_reg->PUPDR |= (mode & 0x03) << offset;
mutech 6:5aff0da4b663 97 }
mutech 0:dff187a80020 98 }
mutech 0:dff187a80020 99 #endif
mutech 0:dff187a80020 100
mutech 0:dff187a80020 101 void WS281X::setRGBOrder(RGBOrder rgbOrder)
mutech 0:dff187a80020 102 {
mutech 0:dff187a80020 103 _rgbOrder = rgbOrder;
mutech 0:dff187a80020 104 switch(_rgbOrder)
mutech 0:dff187a80020 105 {
mutech 6:5aff0da4b663 106 case RGB: _1st = 0; _2nd = 1; _3rd = 2; break;
mutech 6:5aff0da4b663 107 case RBG: _1st = 0; _2nd = 2; _3rd = 1; break;
mutech 6:5aff0da4b663 108 case GRB: _1st = 1; _2nd = 0; _3rd = 2; break;
mutech 6:5aff0da4b663 109 case GBR: _1st = 2; _2nd = 0; _3rd = 1; break;
mutech 6:5aff0da4b663 110 case BRG: _1st = 1; _2nd = 2; _3rd = 0; break;
mutech 6:5aff0da4b663 111 case BGR: _1st = 2; _2nd = 1; _3rd = 0; break;
mutech 6:5aff0da4b663 112 default: _1st = 0; _2nd = 1; _3rd = 2; break;
mutech 0:dff187a80020 113 }
mutech 0:dff187a80020 114 }
mutech 0:dff187a80020 115
mutech 0:dff187a80020 116 #define _nop1() __nop()
mutech 0:dff187a80020 117 #define _nop2() __nop(); __nop()
mutech 0:dff187a80020 118 #define _nop3() _nop1(); _nop2()
mutech 0:dff187a80020 119 #define _nop4() _nop2(); _nop2()
mutech 0:dff187a80020 120 #define _nop5() _nop1(); _nop4()
mutech 0:dff187a80020 121 #define _nop6() _nop2(); _nop4()
mutech 0:dff187a80020 122 #define _nop7() _nop3(); _nop4()
mutech 0:dff187a80020 123 #define _nop8() _nop4(); _nop4()
mutech 0:dff187a80020 124 #define _nop9() _nop1(); _nop8()
mutech 0:dff187a80020 125 #define _nop10() _nop2(); _nop8()
mutech 0:dff187a80020 126 #define _nop11() _nop3(); _nop8()
mutech 0:dff187a80020 127 #define _nop12() _nop4(); _nop8()
mutech 0:dff187a80020 128 #define _nop13() _nop5(); _nop8()
mutech 0:dff187a80020 129 #define _nop14() _nop6(); _nop8()
mutech 0:dff187a80020 130 #define _nop15() _nop7(); _nop8()
mutech 0:dff187a80020 131 #define _nop16() _nop8(); _nop8()
mutech 0:dff187a80020 132
mutech 4:4af895bb2979 133 #if defined(TARGET_LPC82X)
mutech 5:8e6835a94e10 134 // LPCXpresso824-MAX (30MHz)
mutech 0:dff187a80020 135 #define DELAY_T0H() do{ _nop2(); }while(0)
mutech 0:dff187a80020 136 #define DELAY_T1H() do{ _nop6(); }while(0)
mutech 0:dff187a80020 137 #define DELAY_TLOW() do{ _nop6(); }while(0)
mutech 0:dff187a80020 138 #define DELAY_TLOW2() //do{ _nop2(); }while(0)
mutech 4:4af895bb2979 139 #define DELAY_SPACE() do{ _nop4(); }while(0)
mutech 4:4af895bb2979 140 #define DELAY_NEXT() //do{ _nop1(); }while(0)
mutech 0:dff187a80020 141 #endif
mutech 0:dff187a80020 142
mutech 0:dff187a80020 143 #if defined(TARGET_STM32F0)
mutech 5:8e6835a94e10 144 // NUCLEO-F030R8 (48MHz)
mutech 5:8e6835a94e10 145 // NUCLEO-F070RB (48MHz)
mutech 0:dff187a80020 146 #define DELAY_T0H() do{ _nop8(); _nop4(); }while(0)
mutech 0:dff187a80020 147 #define DELAY_T1H() do{ _nop8(); _nop8(); }while(0)
mutech 0:dff187a80020 148 #define DELAY_TLOW() do{ _nop16(); }while(0)
mutech 0:dff187a80020 149 #define DELAY_TLOW2() //do{ _nop8(); _nop4(); }while(0)
mutech 4:4af895bb2979 150 #define DELAY_SPACE() do{ _nop8(); _nop6(); }while(0)
mutech 4:4af895bb2979 151 #define DELAY_NEXT() do{ _nop8(); }while(0)
mutech 0:dff187a80020 152 #endif
mutech 0:dff187a80020 153
mutech 6:5aff0da4b663 154 #if defined(TARGET_NUCLEO_F446RE)
mutech 6:5aff0da4b663 155 // NUCLEO-F446RE (180MHz)
mutech 6:5aff0da4b663 156 #define USE_DELAYFUNC 1
mutech 6:5aff0da4b663 157 #define T0H (18)
mutech 6:5aff0da4b663 158 #define T0L (58-T0H)
mutech 6:5aff0da4b663 159 #define T1H (40)
mutech 6:5aff0da4b663 160 #define T1L (58-T1H)
mutech 6:5aff0da4b663 161
mutech 6:5aff0da4b663 162 #define DELAY_T0H() _delay(T0H)
mutech 6:5aff0da4b663 163 #define DELAY_T1H() _delay(T1H-T0H)
mutech 6:5aff0da4b663 164 #define DELAY_TLOW() _delay(T1L)
mutech 6:5aff0da4b663 165 #define DELAY_TLOW2() //DELAY_TLOW()
mutech 6:5aff0da4b663 166 #define DELAY_SPACE() _delay(T1L-2)
mutech 6:5aff0da4b663 167 #define DELAY_NEXT() _delay(16)
mutech 6:5aff0da4b663 168 #endif
mutech 6:5aff0da4b663 169
mutech 4:4af895bb2979 170 #if defined(TARGET_NUCLEO_F746ZG)
mutech 4:4af895bb2979 171 // NUCLEO-F746ZG (216MHz)
mutech 6:5aff0da4b663 172 #define USE_DELAYFUNC 1
mutech 0:dff187a80020 173 #define T0H (35)
mutech 5:8e6835a94e10 174 #define T0L (130-T0H)
mutech 4:4af895bb2979 175 #define T1H (75)
mutech 5:8e6835a94e10 176 #define T1L (130-T1H)
mutech 0:dff187a80020 177
mutech 0:dff187a80020 178 #define DELAY_T0H() _delay(T0H)
mutech 0:dff187a80020 179 #define DELAY_T1H() _delay(T1H-T0H)
mutech 0:dff187a80020 180 #define DELAY_TLOW() _delay(T1L)
mutech 0:dff187a80020 181 #define DELAY_TLOW2() //DELAY_TLOW()
mutech 5:8e6835a94e10 182 #define DELAY_SPACE() _delay(T1L+20)
mutech 4:4af895bb2979 183 #define DELAY_NEXT() _delay(50)
mutech 4:4af895bb2979 184 #endif
mutech 0:dff187a80020 185
mutech 4:4af895bb2979 186 #if defined(TARGET_DISCO_F746NG)
mutech 4:4af895bb2979 187 // TARGET_DISCO_F746NG (216MHz)
mutech 6:5aff0da4b663 188 #define USE_DELAYFUNC 1
mutech 4:4af895bb2979 189 #define T0H (35)
mutech 6:5aff0da4b663 190 #define T0L (125-T0H)
mutech 6:5aff0da4b663 191 #define T1H (90)
mutech 6:5aff0da4b663 192 #define T1L (125-T1H)
mutech 4:4af895bb2979 193
mutech 4:4af895bb2979 194 #define DELAY_T0H() _delay(T0H)
mutech 4:4af895bb2979 195 #define DELAY_T1H() _delay(T1H-T0H)
mutech 4:4af895bb2979 196 #define DELAY_TLOW() _delay(T1L)
mutech 4:4af895bb2979 197 #define DELAY_TLOW2() //DELAY_TLOW()
mutech 6:5aff0da4b663 198 #define DELAY_SPACE() _delay(T1L-5)
mutech 6:5aff0da4b663 199 #define DELAY_NEXT() _delay(40)
mutech 4:4af895bb2979 200 #endif
mutech 4:4af895bb2979 201
mutech 6:5aff0da4b663 202 #if defined(USE_DELAYFUNC) && (USE_DELAYFUNC != 0)
mutech 6:5aff0da4b663 203 static inline __attribute__((always_inline))
mutech 6:5aff0da4b663 204 void _delay(int value)
mutech 0:dff187a80020 205 {
mutech 0:dff187a80020 206 do { __nop(); } while (--value);
mutech 0:dff187a80020 207 }
mutech 0:dff187a80020 208 #endif
mutech 0:dff187a80020 209
mutech 0:dff187a80020 210 inline __attribute__((always_inline))
mutech 0:dff187a80020 211 void WS281X::writeByte(__IO regsize_t *reg_set, __IO regsize_t *reg_clr, regsize_t *mask, uint8_t value)
mutech 0:dff187a80020 212 {
mutech 0:dff187a80020 213 do
mutech 0:dff187a80020 214 {
mutech 6:5aff0da4b663 215 #if 1
mutech 0:dff187a80020 216 // bit7
mutech 0:dff187a80020 217 *reg_set = mask[0];
mutech 0:dff187a80020 218 DELAY_T0H();
mutech 0:dff187a80020 219 *reg_clr = mask[(value >> 7) & 1];
mutech 0:dff187a80020 220 DELAY_T1H();
mutech 0:dff187a80020 221 *reg_clr = mask[0];
mutech 0:dff187a80020 222 DELAY_TLOW();
mutech 0:dff187a80020 223
mutech 0:dff187a80020 224 // bit6
mutech 0:dff187a80020 225 *reg_set = mask[0];
mutech 0:dff187a80020 226 DELAY_T0H();
mutech 0:dff187a80020 227 *reg_clr = mask[(value >> 6) & 1];
mutech 0:dff187a80020 228 DELAY_T1H();
mutech 0:dff187a80020 229 *reg_clr = mask[0];
mutech 0:dff187a80020 230 DELAY_TLOW();
mutech 0:dff187a80020 231
mutech 0:dff187a80020 232 // bit5
mutech 0:dff187a80020 233 *reg_set = mask[0];
mutech 0:dff187a80020 234 DELAY_T0H();
mutech 0:dff187a80020 235 *reg_clr = mask[(value >> 5) & 1];
mutech 0:dff187a80020 236 DELAY_T1H();
mutech 0:dff187a80020 237 *reg_clr = mask[0];
mutech 0:dff187a80020 238 DELAY_TLOW();
mutech 0:dff187a80020 239
mutech 0:dff187a80020 240 // bit4
mutech 0:dff187a80020 241 *reg_set = mask[0];
mutech 0:dff187a80020 242 DELAY_T0H();
mutech 0:dff187a80020 243 *reg_clr = mask[(value >> 4) & 1];
mutech 0:dff187a80020 244 DELAY_T1H();
mutech 0:dff187a80020 245 *reg_clr = mask[0];
mutech 0:dff187a80020 246 DELAY_TLOW();
mutech 6:5aff0da4b663 247 #endif
mutech 0:dff187a80020 248
mutech 0:dff187a80020 249 // bit3
mutech 0:dff187a80020 250 *reg_set = mask[0];
mutech 0:dff187a80020 251 DELAY_T0H();
mutech 0:dff187a80020 252 *reg_clr = mask[(value >> 3) & 1];
mutech 0:dff187a80020 253 DELAY_T1H();
mutech 0:dff187a80020 254 *reg_clr = mask[0];
mutech 0:dff187a80020 255 DELAY_TLOW();
mutech 0:dff187a80020 256
mutech 0:dff187a80020 257 // bit2
mutech 0:dff187a80020 258 *reg_set = mask[0];
mutech 0:dff187a80020 259 DELAY_T0H();
mutech 0:dff187a80020 260 *reg_clr = mask[(value >> 2) & 1];
mutech 0:dff187a80020 261 DELAY_T1H();
mutech 0:dff187a80020 262 *reg_clr = mask[0];
mutech 0:dff187a80020 263 DELAY_TLOW();
mutech 0:dff187a80020 264
mutech 0:dff187a80020 265 // bit1
mutech 0:dff187a80020 266 *reg_set = mask[0];
mutech 0:dff187a80020 267 DELAY_T0H();
mutech 0:dff187a80020 268 *reg_clr = mask[(value >> 1) & 1];
mutech 0:dff187a80020 269 DELAY_T1H();
mutech 0:dff187a80020 270 *reg_clr = mask[0];
mutech 0:dff187a80020 271 DELAY_TLOW();
mutech 0:dff187a80020 272
mutech 0:dff187a80020 273 // bit0
mutech 0:dff187a80020 274 *reg_set = mask[0];
mutech 0:dff187a80020 275 DELAY_T0H();
mutech 0:dff187a80020 276 *reg_clr = mask[(value >> 0) & 1];
mutech 0:dff187a80020 277 DELAY_T1H();
mutech 0:dff187a80020 278 *reg_clr = mask[0];
mutech 0:dff187a80020 279 DELAY_TLOW2();
mutech 0:dff187a80020 280
mutech 0:dff187a80020 281 } while (0);
mutech 0:dff187a80020 282 }
mutech 0:dff187a80020 283
mutech 0:dff187a80020 284 void WS281X::show()
mutech 0:dff187a80020 285 {
mutech 0:dff187a80020 286 // CPU_FREQ = 30MHz -> 0.0333us/cycle
mutech 0:dff187a80020 287 // WS2811 0: 0.25us+1.0us, 1: 1.0us+0.25us
mutech 0:dff187a80020 288 // WS2812 0: 0.45us+0.8us, 1: 0.8us+0.45us
mutech 0:dff187a80020 289
mutech 0:dff187a80020 290 #if defined(TARGET_NXP)
mutech 0:dff187a80020 291 __IO uint32_t *reg_set = _gpio.reg_set;
mutech 0:dff187a80020 292 __IO uint32_t *reg_clr = _gpio.reg_clr;
mutech 0:dff187a80020 293 uint32_t mask[2] = { _gpio.mask, 0 };
mutech 0:dff187a80020 294 #elif defined(TARGET_STM32F0) || defined(TARGET_STM32F1)
mutech 0:dff187a80020 295 __IO uint32_t *reg_set = _gpio.reg_set;
mutech 0:dff187a80020 296 __IO uint32_t *reg_clr = _gpio.reg_clr;
mutech 0:dff187a80020 297 uint32_t mask[2] = { _gpio.mask, 0 };
mutech 0:dff187a80020 298 #elif defined(TARGET_STM)
mutech 0:dff187a80020 299 __IO uint16_t *reg_set = (__IO uint16_t *)_gpio.reg_set_clr;
mutech 0:dff187a80020 300 __IO uint16_t *reg_clr = reg_set + 1;
mutech 0:dff187a80020 301 uint16_t mask[2] = { _gpio.mask, 0 };
mutech 0:dff187a80020 302 #endif
mutech 0:dff187a80020 303
mutech 0:dff187a80020 304 uint8_t *pix = (uint8_t *)_pixels;
mutech 0:dff187a80020 305 uint8_t *end = pix + (_numPixels * sizeof(_pixels[0]));
mutech 0:dff187a80020 306
mutech 0:dff187a80020 307 __disable_irq(); // Disable interrupts temporarily because we don't want our pulse timing to be messed up.
mutech 0:dff187a80020 308
mutech 0:dff187a80020 309 uint8_t value;
mutech 0:dff187a80020 310 do
mutech 0:dff187a80020 311 {
mutech 0:dff187a80020 312 value = pix[_1st];
mutech 0:dff187a80020 313 writeByte(reg_set, reg_clr, mask, value);
mutech 0:dff187a80020 314 DELAY_SPACE();
mutech 0:dff187a80020 315
mutech 0:dff187a80020 316 value = pix[_2nd];
mutech 0:dff187a80020 317 writeByte(reg_set, reg_clr, mask, value);
mutech 0:dff187a80020 318 DELAY_SPACE();
mutech 0:dff187a80020 319
mutech 0:dff187a80020 320 value = pix[_3rd];
mutech 0:dff187a80020 321 writeByte(reg_set, reg_clr, mask, value);
mutech 0:dff187a80020 322 pix += sizeof(_pixels[0]);
mutech 0:dff187a80020 323 DELAY_NEXT();
mutech 0:dff187a80020 324 } while (pix < end);
mutech 0:dff187a80020 325
mutech 0:dff187a80020 326 __enable_irq(); // Re-enable interrupts now that we are done.
mutech 0:dff187a80020 327
mutech 0:dff187a80020 328 wait_us(50);
mutech 0:dff187a80020 329 }
mutech 0:dff187a80020 330
mutech 0:dff187a80020 331 // 先頭から指定サイズ分のブロックをバッファの最後までコピーする
mutech 0:dff187a80020 332 void WS281X::repeatBlock(int block_size)
mutech 0:dff187a80020 333 {
mutech 0:dff187a80020 334 if (block_size < 1 || block_size >= _numPixels)
mutech 0:dff187a80020 335 return;
mutech 0:dff187a80020 336
mutech 0:dff187a80020 337 RGBColor *dest = _pixels + block_size;
mutech 0:dff187a80020 338 int left = _numPixels - block_size;
mutech 0:dff187a80020 339 while (left > block_size)
mutech 0:dff187a80020 340 {
mutech 0:dff187a80020 341 memcpy(dest, _pixels, block_size * sizeof(_pixels[0]));
mutech 0:dff187a80020 342 dest += block_size;
mutech 0:dff187a80020 343 left -= block_size;
mutech 0:dff187a80020 344 block_size <<= 1; // 次回は２倍のサイズの転送
mutech 0:dff187a80020 345 }
mutech 0:dff187a80020 346 memcpy(dest, _pixels, left * sizeof(_pixels[0]));
mutech 0:dff187a80020 347 }
mutech 0:dff187a80020 348
mutech 0:dff187a80020 349 // 指定色でバッファを埋める
mutech 2:cc8e091fd975 350 void WS281X::clear(RGBColor color)
mutech 0:dff187a80020 351 {
mutech 0:dff187a80020 352 _pixels[0] = color;
mutech 0:dff187a80020 353 repeatBlock(1);
mutech 0:dff187a80020 354 }
mutech 0:dff187a80020 355
mutech 0:dff187a80020 356 // 指定色でバッファを埋めた後表示
mutech 2:cc8e091fd975 357 void WS281X::show(RGBColor color)
mutech 0:dff187a80020 358 {
mutech 0:dff187a80020 359 clear(color);
mutech 0:dff187a80020 360 show();
mutech 0:dff187a80020 361 }
mutech 0:dff187a80020 362
mutech 0:dff187a80020 363 //----------------------------------------------------------------------------