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WS2812.cpp@2:645ab1279245, 2017-08-16 (annotated)
- Committer:
- elmoow
- Date:
- Wed Aug 16 23:24:49 2017 +0000
- Revision:
- 2:645ab1279245
- Parent:
- 1:8910a1fcbdb0
final1
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
devararendy | 0:f080cb888db6 | 1 | #include "WS2812.h" |
devararendy | 0:f080cb888db6 | 2 | |
devararendy | 0:f080cb888db6 | 3 | |
devararendy | 0:f080cb888db6 | 4 | WS2812::WS2812(PinName pin, int qty):dataOut(pin) |
devararendy | 0:f080cb888db6 | 5 | { |
devararendy | 0:f080cb888db6 | 6 | dataPin = pin; |
devararendy | 0:f080cb888db6 | 7 | LED_Qty = qty; |
devararendy | 0:f080cb888db6 | 8 | } |
devararendy | 0:f080cb888db6 | 9 | WS2812::~WS2812() |
devararendy | 0:f080cb888db6 | 10 | { |
devararendy | 0:f080cb888db6 | 11 | |
devararendy | 0:f080cb888db6 | 12 | } |
devararendy | 0:f080cb888db6 | 13 | void WS2812::sendReset() |
devararendy | 0:f080cb888db6 | 14 | { |
devararendy | 0:f080cb888db6 | 15 | dataOut = 0; |
devararendy | 0:f080cb888db6 | 16 | wait_us(60); |
devararendy | 0:f080cb888db6 | 17 | } |
devararendy | 0:f080cb888db6 | 18 | void WS2812::writeColor(uint32_t RGB) |
devararendy | 0:f080cb888db6 | 19 | { |
devararendy | 0:f080cb888db6 | 20 | Red = ((RGB&0xFF0000)>>16); |
devararendy | 0:f080cb888db6 | 21 | Green = ((RGB&0xFF00)>>8); |
devararendy | 0:f080cb888db6 | 22 | Blue = (RGB&0xFF); |
devararendy | 0:f080cb888db6 | 23 | |
devararendy | 0:f080cb888db6 | 24 | writeByte(Green); |
devararendy | 0:f080cb888db6 | 25 | writeByte(Red); |
devararendy | 0:f080cb888db6 | 26 | writeByte(Blue); |
devararendy | 0:f080cb888db6 | 27 | |
devararendy | 0:f080cb888db6 | 28 | } |
devararendy | 0:f080cb888db6 | 29 | void WS2812::send0() |
devararendy | 0:f080cb888db6 | 30 | { |
devararendy | 0:f080cb888db6 | 31 | dataOut = 1; |
elmoow | 2:645ab1279245 | 32 | //0.4uS (28 nops) |
elmoow | 2:645ab1279245 | 33 | asm("nop"); |
elmoow | 2:645ab1279245 | 34 | asm("nop"); |
elmoow | 2:645ab1279245 | 35 | asm("nop"); |
elmoow | 2:645ab1279245 | 36 | asm("nop"); |
elmoow | 2:645ab1279245 | 37 | asm("nop"); |
elmoow | 2:645ab1279245 | 38 | asm("nop"); |
elmoow | 2:645ab1279245 | 39 | asm("nop"); |
elmoow | 2:645ab1279245 | 40 | asm("nop"); |
elmoow | 2:645ab1279245 | 41 | asm("nop"); |
elmoow | 2:645ab1279245 | 42 | asm("nop"); |
elmoow | 2:645ab1279245 | 43 | asm("nop"); |
elmoow | 2:645ab1279245 | 44 | asm("nop"); |
elmoow | 2:645ab1279245 | 45 | asm("nop"); |
elmoow | 2:645ab1279245 | 46 | asm("nop"); |
elmoow | 2:645ab1279245 | 47 | asm("nop"); |
elmoow | 2:645ab1279245 | 48 | asm("nop"); |
elmoow | 2:645ab1279245 | 49 | asm("nop"); |
elmoow | 2:645ab1279245 | 50 | asm("nop"); |
elmoow | 2:645ab1279245 | 51 | asm("nop"); |
elmoow | 2:645ab1279245 | 52 | asm("nop"); |
elmoow | 2:645ab1279245 | 53 | asm("nop"); |
devararendy | 0:f080cb888db6 | 54 | asm("nop"); |
devararendy | 0:f080cb888db6 | 55 | asm("nop"); |
devararendy | 0:f080cb888db6 | 56 | asm("nop"); |
devararendy | 0:f080cb888db6 | 57 | asm("nop"); |
devararendy | 0:f080cb888db6 | 58 | asm("nop"); |
devararendy | 0:f080cb888db6 | 59 | asm("nop"); |
devararendy | 0:f080cb888db6 | 60 | asm("nop"); |
devararendy | 0:f080cb888db6 | 61 | dataOut = 0; |
elmoow | 2:645ab1279245 | 62 | //0.85uS (59 nops) |
devararendy | 0:f080cb888db6 | 63 | asm("nop"); |
devararendy | 0:f080cb888db6 | 64 | asm("nop"); |
devararendy | 0:f080cb888db6 | 65 | asm("nop"); |
devararendy | 0:f080cb888db6 | 66 | asm("nop"); |
devararendy | 0:f080cb888db6 | 67 | asm("nop"); |
devararendy | 0:f080cb888db6 | 68 | asm("nop"); |
devararendy | 0:f080cb888db6 | 69 | asm("nop"); |
devararendy | 0:f080cb888db6 | 70 | asm("nop"); |
devararendy | 0:f080cb888db6 | 71 | asm("nop"); |
devararendy | 0:f080cb888db6 | 72 | asm("nop"); |
devararendy | 0:f080cb888db6 | 73 | asm("nop"); |
devararendy | 0:f080cb888db6 | 74 | asm("nop"); |
devararendy | 0:f080cb888db6 | 75 | asm("nop"); |
devararendy | 0:f080cb888db6 | 76 | asm("nop"); |
devararendy | 0:f080cb888db6 | 77 | asm("nop"); |
devararendy | 0:f080cb888db6 | 78 | asm("nop"); |
devararendy | 0:f080cb888db6 | 79 | asm("nop"); |
devararendy | 0:f080cb888db6 | 80 | asm("nop"); |
elmoow | 2:645ab1279245 | 81 | asm("nop"); |
elmoow | 2:645ab1279245 | 82 | asm("nop"); |
elmoow | 2:645ab1279245 | 83 | asm("nop"); |
elmoow | 2:645ab1279245 | 84 | asm("nop"); |
elmoow | 2:645ab1279245 | 85 | asm("nop"); |
elmoow | 2:645ab1279245 | 86 | asm("nop"); |
elmoow | 2:645ab1279245 | 87 | asm("nop"); |
elmoow | 2:645ab1279245 | 88 | asm("nop"); |
elmoow | 2:645ab1279245 | 89 | asm("nop"); |
elmoow | 2:645ab1279245 | 90 | asm("nop"); |
elmoow | 2:645ab1279245 | 91 | asm("nop"); |
elmoow | 2:645ab1279245 | 92 | asm("nop"); |
elmoow | 2:645ab1279245 | 93 | asm("nop"); |
elmoow | 2:645ab1279245 | 94 | asm("nop"); |
elmoow | 2:645ab1279245 | 95 | asm("nop"); |
elmoow | 2:645ab1279245 | 96 | asm("nop"); |
elmoow | 2:645ab1279245 | 97 | asm("nop"); |
elmoow | 2:645ab1279245 | 98 | asm("nop"); |
elmoow | 2:645ab1279245 | 99 | asm("nop"); |
elmoow | 2:645ab1279245 | 100 | asm("nop"); |
elmoow | 2:645ab1279245 | 101 | asm("nop"); |
elmoow | 2:645ab1279245 | 102 | asm("nop"); |
elmoow | 2:645ab1279245 | 103 | asm("nop"); |
elmoow | 2:645ab1279245 | 104 | asm("nop"); |
elmoow | 2:645ab1279245 | 105 | asm("nop"); |
elmoow | 2:645ab1279245 | 106 | asm("nop"); |
devararendy | 0:f080cb888db6 | 107 | asm("nop"); |
devararendy | 0:f080cb888db6 | 108 | asm("nop"); |
devararendy | 0:f080cb888db6 | 109 | asm("nop"); |
devararendy | 0:f080cb888db6 | 110 | asm("nop"); |
devararendy | 0:f080cb888db6 | 111 | asm("nop"); |
elmoow | 2:645ab1279245 | 112 | asm("nop"); |
elmoow | 2:645ab1279245 | 113 | asm("nop"); |
elmoow | 2:645ab1279245 | 114 | asm("nop"); |
devararendy | 0:f080cb888db6 | 115 | asm("nop"); |
elmoow | 2:645ab1279245 | 116 | asm("nop"); |
elmoow | 2:645ab1279245 | 117 | asm("nop"); |
elmoow | 2:645ab1279245 | 118 | asm("nop"); |
elmoow | 2:645ab1279245 | 119 | asm("nop"); |
devararendy | 0:f080cb888db6 | 120 | asm("nop"); |
devararendy | 0:f080cb888db6 | 121 | asm("nop"); |
devararendy | 0:f080cb888db6 | 122 | } |
devararendy | 0:f080cb888db6 | 123 | void WS2812::send1() |
devararendy | 0:f080cb888db6 | 124 | { |
devararendy | 0:f080cb888db6 | 125 | dataOut = 1; |
elmoow | 2:645ab1279245 | 126 | //0.8uS (55nops) |
elmoow | 2:645ab1279245 | 127 | asm("nop"); |
elmoow | 2:645ab1279245 | 128 | asm("nop"); |
elmoow | 2:645ab1279245 | 129 | asm("nop"); |
elmoow | 2:645ab1279245 | 130 | asm("nop"); |
devararendy | 0:f080cb888db6 | 131 | asm("nop"); |
devararendy | 0:f080cb888db6 | 132 | asm("nop"); |
devararendy | 0:f080cb888db6 | 133 | asm("nop"); |
devararendy | 0:f080cb888db6 | 134 | asm("nop"); |
devararendy | 0:f080cb888db6 | 135 | asm("nop"); |
devararendy | 0:f080cb888db6 | 136 | asm("nop"); |
devararendy | 0:f080cb888db6 | 137 | asm("nop"); |
devararendy | 0:f080cb888db6 | 138 | asm("nop"); |
devararendy | 0:f080cb888db6 | 139 | asm("nop"); |
devararendy | 0:f080cb888db6 | 140 | asm("nop"); |
elmoow | 2:645ab1279245 | 141 | asm("nop"); |
elmoow | 2:645ab1279245 | 142 | asm("nop"); |
elmoow | 2:645ab1279245 | 143 | asm("nop"); |
elmoow | 2:645ab1279245 | 144 | asm("nop"); |
elmoow | 2:645ab1279245 | 145 | asm("nop"); |
devararendy | 0:f080cb888db6 | 146 | asm("nop"); |
devararendy | 0:f080cb888db6 | 147 | asm("nop"); |
devararendy | 0:f080cb888db6 | 148 | asm("nop"); |
devararendy | 0:f080cb888db6 | 149 | asm("nop"); |
devararendy | 0:f080cb888db6 | 150 | asm("nop"); |
elmoow | 2:645ab1279245 | 151 | asm("nop"); |
elmoow | 2:645ab1279245 | 152 | asm("nop"); |
elmoow | 2:645ab1279245 | 153 | asm("nop"); |
elmoow | 2:645ab1279245 | 154 | asm("nop"); |
elmoow | 2:645ab1279245 | 155 | asm("nop"); |
elmoow | 2:645ab1279245 | 156 | asm("nop"); |
devararendy | 0:f080cb888db6 | 157 | asm("nop"); |
devararendy | 0:f080cb888db6 | 158 | asm("nop"); |
devararendy | 0:f080cb888db6 | 159 | asm("nop"); |
devararendy | 0:f080cb888db6 | 160 | asm("nop"); |
elmoow | 2:645ab1279245 | 161 | asm("nop"); |
devararendy | 0:f080cb888db6 | 162 | asm("nop"); |
elmoow | 2:645ab1279245 | 163 | asm("nop"); |
elmoow | 2:645ab1279245 | 164 | asm("nop"); |
elmoow | 2:645ab1279245 | 165 | asm("nop"); |
elmoow | 2:645ab1279245 | 166 | asm("nop"); |
elmoow | 2:645ab1279245 | 167 | asm("nop"); |
elmoow | 2:645ab1279245 | 168 | asm("nop"); |
elmoow | 2:645ab1279245 | 169 | asm("nop"); |
elmoow | 2:645ab1279245 | 170 | asm("nop"); |
elmoow | 2:645ab1279245 | 171 | asm("nop"); |
devararendy | 0:f080cb888db6 | 172 | asm("nop"); |
devararendy | 0:f080cb888db6 | 173 | asm("nop"); |
devararendy | 0:f080cb888db6 | 174 | asm("nop"); |
devararendy | 0:f080cb888db6 | 175 | asm("nop"); |
devararendy | 0:f080cb888db6 | 176 | asm("nop"); |
devararendy | 0:f080cb888db6 | 177 | asm("nop"); |
devararendy | 0:f080cb888db6 | 178 | asm("nop"); |
devararendy | 0:f080cb888db6 | 179 | asm("nop"); |
devararendy | 0:f080cb888db6 | 180 | asm("nop"); |
devararendy | 0:f080cb888db6 | 181 | asm("nop"); |
devararendy | 0:f080cb888db6 | 182 | dataOut = 0; |
elmoow | 2:645ab1279245 | 183 | //0.45uS (30 nops) |
devararendy | 0:f080cb888db6 | 184 | asm("nop"); |
elmoow | 2:645ab1279245 | 185 | asm("nop"); |
devararendy | 0:f080cb888db6 | 186 | asm("nop"); |
elmoow | 2:645ab1279245 | 187 | asm("nop"); |
devararendy | 0:f080cb888db6 | 188 | asm("nop"); |
devararendy | 0:f080cb888db6 | 189 | asm("nop"); |
devararendy | 0:f080cb888db6 | 190 | asm("nop"); |
devararendy | 0:f080cb888db6 | 191 | asm("nop"); |
elmoow | 2:645ab1279245 | 192 | asm("nop"); |
devararendy | 0:f080cb888db6 | 193 | asm("nop"); |
devararendy | 0:f080cb888db6 | 194 | asm("nop"); |
devararendy | 0:f080cb888db6 | 195 | asm("nop"); |
devararendy | 0:f080cb888db6 | 196 | asm("nop"); |
elmoow | 2:645ab1279245 | 197 | asm("nop"); |
devararendy | 0:f080cb888db6 | 198 | asm("nop"); |
devararendy | 0:f080cb888db6 | 199 | asm("nop"); |
devararendy | 0:f080cb888db6 | 200 | asm("nop"); |
devararendy | 0:f080cb888db6 | 201 | asm("nop"); |
elmoow | 2:645ab1279245 | 202 | asm("nop"); |
devararendy | 0:f080cb888db6 | 203 | asm("nop"); |
devararendy | 0:f080cb888db6 | 204 | asm("nop"); |
devararendy | 0:f080cb888db6 | 205 | asm("nop"); |
devararendy | 0:f080cb888db6 | 206 | asm("nop"); |
elmoow | 2:645ab1279245 | 207 | asm("nop"); |
devararendy | 0:f080cb888db6 | 208 | asm("nop"); |
devararendy | 0:f080cb888db6 | 209 | asm("nop"); |
devararendy | 0:f080cb888db6 | 210 | asm("nop"); |
devararendy | 0:f080cb888db6 | 211 | asm("nop"); |
devararendy | 0:f080cb888db6 | 212 | asm("nop"); |
devararendy | 0:f080cb888db6 | 213 | } |
devararendy | 0:f080cb888db6 | 214 | void WS2812::writeByte(uint8_t data) |
devararendy | 0:f080cb888db6 | 215 | { |
devararendy | 0:f080cb888db6 | 216 | for(int x=7;x>=0;x--) |
devararendy | 0:f080cb888db6 | 217 | { |
devararendy | 0:f080cb888db6 | 218 | if(data&(1<<x)) |
devararendy | 0:f080cb888db6 | 219 | { |
devararendy | 0:f080cb888db6 | 220 | //bit is high |
devararendy | 0:f080cb888db6 | 221 | send1(); |
devararendy | 0:f080cb888db6 | 222 | } |
devararendy | 0:f080cb888db6 | 223 | else |
devararendy | 0:f080cb888db6 | 224 | { |
devararendy | 0:f080cb888db6 | 225 | //bit is low |
devararendy | 0:f080cb888db6 | 226 | send0(); |
devararendy | 0:f080cb888db6 | 227 | } |
devararendy | 0:f080cb888db6 | 228 | } |
devararendy | 0:f080cb888db6 | 229 | } |
devararendy | 0:f080cb888db6 | 230 | void WS2812::send1Color(uint32_t RGB) |
devararendy | 0:f080cb888db6 | 231 | { |
devararendy | 0:f080cb888db6 | 232 | writeColor(RGB); |
devararendy | 0:f080cb888db6 | 233 | sendReset(); |
devararendy | 1:8910a1fcbdb0 | 234 | } |
devararendy | 1:8910a1fcbdb0 | 235 | void WS2812::sendColors(uint32_t * ColorBuffer) |
devararendy | 1:8910a1fcbdb0 | 236 | { |
devararendy | 1:8910a1fcbdb0 | 237 | for(int x=0;x<LED_Qty;x++) |
devararendy | 1:8910a1fcbdb0 | 238 | { |
devararendy | 1:8910a1fcbdb0 | 239 | writeColor(*(&ColorBuffer[x])); |
devararendy | 1:8910a1fcbdb0 | 240 | } |
devararendy | 1:8910a1fcbdb0 | 241 | sendReset(); |
devararendy | 0:f080cb888db6 | 242 | } |