ILI9341 TFT LCD with Arduino - 아두이노로 ILI9341 사용하기
Raspberry Pi & Arduino 2020. 11. 19. 20:30 |반응형
2.2인치 ILI9341 TFT LCD를 아두이노와 함께 사용해 보자.
알리에서 약 5천원에 구매한 ILI9341.
Logic Signal Voltage Level은 3.3V이지만 J1을 납땜해 연결하면 5V의 Signal도 입력 받을 수 있다(납땝이 좀 지저분하게 됐다). 하지만 이 방법 보다는 Logic Level Converter를 사용하는게 좋다.
원래 J1은 이렇게 떨어져 있다.
사실 ILI9341은 아두이노가 아니라 라즈베리파이와 함께 사용해보려 했지만 인터넷에 있는 대부분의 자료들이 더 이상 적용되지 않았다. 백라이트조차 켜지지 않았다. 라즈베리파이 운영체제의 업데이트, 소프트웨어의 업데이트 등으로 변경된 내용이 많아 좀 더 정리가 필요했다.
아두이노와 연결 하자.
ILI9341 - Arduino
DC - 9
CS - 10
RESET - 8
MOSI - 11
MISO - 12
SCK - 13
LED - 3.3V
VCC - 5V
GND - GND
아두이노IDE에서 File - Examples - Adafruit ILI9341 - graphictest을 선택하면 아래 소스가 로드된다.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 | /*************************************************** This is our GFX example for the Adafruit ILI9341 Breakout and Shield ----> http://www.adafruit.com/products/1651 Check out the links above for our tutorials and wiring diagrams These displays use SPI to communicate, 4 or 5 pins are required to interface (RST is optional) Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit! Written by Limor Fried/Ladyada for Adafruit Industries. MIT license, all text above must be included in any redistribution ****************************************************/ #include "SPI.h" #include "Adafruit_GFX.h" #include "Adafruit_ILI9341.h" // For the Adafruit shield, these are the default. #define TFT_DC 9 #define TFT_CS 10 // Adafruit shield가 아닌 경우 아래와 같이 핀 추가. #define TFT_RST 8 #define TFT_MOSI 11 #define TFT_MISO 12 #define TFT_CLK 13 // Use hardware SPI (on Uno, #13, #12, #11) and the above for CS/DC //Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC); // If using the breakout, change pins as desired Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST, TFT_MISO); void setup() { Serial.begin(9600); Serial.println("ILI9341 Test!"); tft.begin(); // read diagnostics (optional but can help debug problems) uint8_t x = tft.readcommand8(ILI9341_RDMODE); Serial.print("Display Power Mode: 0x"); Serial.println(x, HEX); x = tft.readcommand8(ILI9341_RDMADCTL); Serial.print("MADCTL Mode: 0x"); Serial.println(x, HEX); x = tft.readcommand8(ILI9341_RDPIXFMT); Serial.print("Pixel Format: 0x"); Serial.println(x, HEX); x = tft.readcommand8(ILI9341_RDIMGFMT); Serial.print("Image Format: 0x"); Serial.println(x, HEX); x = tft.readcommand8(ILI9341_RDSELFDIAG); Serial.print("Self Diagnostic: 0x"); Serial.println(x, HEX); Serial.println(F("Benchmark Time (microseconds)")); delay(10); Serial.print(F("Screen fill ")); Serial.println(testFillScreen()); delay(500); Serial.print(F("Text ")); Serial.println(testText()); delay(3000); Serial.print(F("Lines ")); Serial.println(testLines(ILI9341_CYAN)); delay(500); Serial.print(F("Horiz/Vert Lines ")); Serial.println(testFastLines(ILI9341_RED, ILI9341_BLUE)); delay(500); Serial.print(F("Rectangles (outline) ")); Serial.println(testRects(ILI9341_GREEN)); delay(500); Serial.print(F("Rectangles (filled) ")); Serial.println(testFilledRects(ILI9341_YELLOW, ILI9341_MAGENTA)); delay(500); Serial.print(F("Circles (filled) ")); Serial.println(testFilledCircles(10, ILI9341_MAGENTA)); Serial.print(F("Circles (outline) ")); Serial.println(testCircles(10, ILI9341_WHITE)); delay(500); Serial.print(F("Triangles (outline) ")); Serial.println(testTriangles()); delay(500); Serial.print(F("Triangles (filled) ")); Serial.println(testFilledTriangles()); delay(500); Serial.print(F("Rounded rects (outline) ")); Serial.println(testRoundRects()); delay(500); Serial.print(F("Rounded rects (filled) ")); Serial.println(testFilledRoundRects()); delay(500); Serial.println(F("Done!")); } void loop(void) { for(uint8_t rotation=0; rotation<4; rotation++) { tft.setRotation(rotation); testText(); delay(1000); } } unsigned long testFillScreen() { unsigned long start = micros(); tft.fillScreen(ILI9341_BLACK); yield(); tft.fillScreen(ILI9341_RED); yield(); tft.fillScreen(ILI9341_GREEN); yield(); tft.fillScreen(ILI9341_BLUE); yield(); tft.fillScreen(ILI9341_BLACK); yield(); return micros() - start; } unsigned long testText() { tft.fillScreen(ILI9341_BLACK); unsigned long start = micros(); tft.setCursor(0, 0); tft.setTextColor(ILI9341_WHITE); tft.setTextSize(1); tft.println("Hello World!"); tft.setTextColor(ILI9341_YELLOW); tft.setTextSize(2); tft.println(1234.56); tft.setTextColor(ILI9341_RED); tft.setTextSize(3); tft.println(0xDEADBEEF, HEX); tft.println(); tft.setTextColor(ILI9341_GREEN); tft.setTextSize(5); tft.println("Groop"); tft.setTextSize(2); tft.println("I implore thee,"); tft.setTextSize(1); tft.println("my foonting turlingdromes."); tft.println("And hooptiously drangle me"); tft.println("with crinkly bindlewurdles,"); tft.println("Or I will rend thee"); tft.println("in the gobberwarts"); tft.println("with my blurglecruncheon,"); tft.println("see if I don't!"); return micros() - start; } unsigned long testLines(uint16_t color) { unsigned long start, t; int x1, y1, x2, y2, w = tft.width(), h = tft.height(); tft.fillScreen(ILI9341_BLACK); yield(); x1 = y1 = 0; y2 = h - 1; start = micros(); for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color); x2 = w - 1; for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color); t = micros() - start; // fillScreen doesn't count against timing yield(); tft.fillScreen(ILI9341_BLACK); yield(); x1 = w - 1; y1 = 0; y2 = h - 1; start = micros(); for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color); x2 = 0; for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color); t += micros() - start; yield(); tft.fillScreen(ILI9341_BLACK); yield(); x1 = 0; y1 = h - 1; y2 = 0; start = micros(); for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color); x2 = w - 1; for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color); t += micros() - start; yield(); tft.fillScreen(ILI9341_BLACK); yield(); x1 = w - 1; y1 = h - 1; y2 = 0; start = micros(); for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color); x2 = 0; for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color); yield(); return micros() - start; } unsigned long testFastLines(uint16_t color1, uint16_t color2) { unsigned long start; int x, y, w = tft.width(), h = tft.height(); tft.fillScreen(ILI9341_BLACK); start = micros(); for(y=0; y<h; y+=5) tft.drawFastHLine(0, y, w, color1); for(x=0; x<w; x+=5) tft.drawFastVLine(x, 0, h, color2); return micros() - start; } unsigned long testRects(uint16_t color) { unsigned long start; int n, i, i2, cx = tft.width() / 2, cy = tft.height() / 2; tft.fillScreen(ILI9341_BLACK); n = min(tft.width(), tft.height()); start = micros(); for(i=2; i<n; i+=6) { i2 = i / 2; tft.drawRect(cx-i2, cy-i2, i, i, color); } return micros() - start; } unsigned long testFilledRects(uint16_t color1, uint16_t color2) { unsigned long start, t = 0; int n, i, i2, cx = tft.width() / 2 - 1, cy = tft.height() / 2 - 1; tft.fillScreen(ILI9341_BLACK); n = min(tft.width(), tft.height()); for(i=n; i>0; i-=6) { i2 = i / 2; start = micros(); tft.fillRect(cx-i2, cy-i2, i, i, color1); t += micros() - start; // Outlines are not included in timing results tft.drawRect(cx-i2, cy-i2, i, i, color2); yield(); } return t; } unsigned long testFilledCircles(uint8_t radius, uint16_t color) { unsigned long start; int x, y, w = tft.width(), h = tft.height(), r2 = radius * 2; tft.fillScreen(ILI9341_BLACK); start = micros(); for(x=radius; x<w; x+=r2) { for(y=radius; y<h; y+=r2) { tft.fillCircle(x, y, radius, color); } } return micros() - start; } unsigned long testCircles(uint8_t radius, uint16_t color) { unsigned long start; int x, y, r2 = radius * 2, w = tft.width() + radius, h = tft.height() + radius; // Screen is not cleared for this one -- this is // intentional and does not affect the reported time. start = micros(); for(x=0; x<w; x+=r2) { for(y=0; y<h; y+=r2) { tft.drawCircle(x, y, radius, color); } } return micros() - start; } unsigned long testTriangles() { unsigned long start; int n, i, cx = tft.width() / 2 - 1, cy = tft.height() / 2 - 1; tft.fillScreen(ILI9341_BLACK); n = min(cx, cy); start = micros(); for(i=0; i<n; i+=5) { tft.drawTriangle( cx , cy - i, // peak cx - i, cy + i, // bottom left cx + i, cy + i, // bottom right tft.color565(i, i, i)); } return micros() - start; } unsigned long testFilledTriangles() { unsigned long start, t = 0; int i, cx = tft.width() / 2 - 1, cy = tft.height() / 2 - 1; tft.fillScreen(ILI9341_BLACK); start = micros(); for(i=min(cx,cy); i>10; i-=5) { start = micros(); tft.fillTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i, tft.color565(0, i*10, i*10)); t += micros() - start; tft.drawTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i, tft.color565(i*10, i*10, 0)); yield(); } return t; } unsigned long testRoundRects() { unsigned long start; int w, i, i2, cx = tft.width() / 2 - 1, cy = tft.height() / 2 - 1; tft.fillScreen(ILI9341_BLACK); w = min(tft.width(), tft.height()); start = micros(); for(i=0; i<w; i+=6) { i2 = i / 2; tft.drawRoundRect(cx-i2, cy-i2, i, i, i/8, tft.color565(i, 0, 0)); } return micros() - start; } unsigned long testFilledRoundRects() { unsigned long start; int i, i2, cx = tft.width() / 2 - 1, cy = tft.height() / 2 - 1; tft.fillScreen(ILI9341_BLACK); start = micros(); for(i=min(tft.width(), tft.height()); i>20; i-=6) { i2 = i / 2; tft.fillRoundRect(cx-i2, cy-i2, i, i, i/8, tft.color565(0, i, 0)); yield(); } return micros() - start; } |
로드된 소스는 Adafruit shield 사용을 전제로 작성된 소스이므로 위와 같이 24~33번 라인을 수정한다.
컴파일하고 업로드하면 그래픽이 표시된다.
실행해 보면 생각만큼 빠르지는 않다. 아두이노 전용은 아니지만 STM32, ESP8266, ESP32를 위한 더 빠른 라이브러리가 있다. 아두이노에도 적용 가능하지 않을까싶다. 아래 링크를 참고하자.
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