drivers/displays/tft/hw/hx8340b.c

   1 /**************************************************************************/
   2 /*!
   3     @file     hx8340b.c
   4     @author   K. Townsend (microBuilder.eu)
   5
   6     @section  DESCRIPTION
   7
   8     Driver for HX8340B 176x220 pixel TFT LCD displays.
   9
  10     This driver uses a bit-banged SPI interface and a 16-bit RGB565
  11     colour palette.
  12
  13     @section  LICENSE
  14
  15     Software License Agreement (BSD License)
  16
  17     Copyright (c) 2012 Kevin Townsend
  18     All rights reserved.
  19
  20     Redistribution and use in source and binary forms, with or without
  21     modification, are permitted provided that the following conditions are met:
  22     1. Redistributions of source code must retain the above copyright
  23     notice, this list of conditions and the following disclaimer.
  24     2. Redistributions in binary form must reproduce the above copyright
  25     notice, this list of conditions and the following disclaimer in the
  26     documentation and/or other materials provided with the distribution.
  27     3. Neither the name of the copyright holders nor the
  28     names of its contributors may be used to endorse or promote products
  29     derived from this software without specific prior written permission.
  30
  31     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
  32     EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  33     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  34     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
  35     DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  36     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  37     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  38     ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  39     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  40     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  41 */
  42 /**************************************************************************/
  43 #include "hx8340b.h"
  44 #include "core/systick/systick.h"
  45 #include "core/gpio/gpio.h"
  46
  47 static lcdOrientation_t lcdOrientation = LCD_ORIENTATION_PORTRAIT;
  48 static lcdProperties_t hx8340bProperties = { 176, 220, FALSE, FALSE, FALSE };
  49
  50 /*************************************************/
  51 /* Private Methods                               */
  52 /*************************************************/
  53
  54 /*************************************************/
  55 void hx8340bWriteCmd(uint8_t command)
  56 {
  57   CLR_CS;
  58
  59   CLR_SDI;
  60   CLR_SCL;
  61   SET_SCL;
  62
  63   uint8_t i = 0;
  64   for (i=0; i<8; i++)
  65   {
  66     if (command & 0x80)
  67     {
  68       SET_SDI;
  69     }
  70     else
  71     {
  72       CLR_SDI;
  73     }
  74     CLR_SCL;
  75     command <<= 1;
  76     SET_SCL;
  77   }
  78   SET_CS;
  79 }
  80
  81 /*************************************************/
  82 void hx8340bWriteData(uint8_t data)
  83 {
  84   CLR_CS;
  85
  86   SET_SDI;
  87   CLR_SCL;
  88   SET_SCL;
  89
  90   uint8_t i = 0;
  91   for (i=0; i<8; i++)
  92   {
  93     if (data & 0x80)
  94     {
  95       SET_SDI;
  96     }
  97     else
  98     {
  99       CLR_SDI;
 100     }
 101     CLR_SCL;
 102     data <<= 1;
 103     SET_SCL;
 104   }
 105   SET_CS;
 106 }
 107
 108 /*************************************************/
 109 void hx8340bWriteData16(uint16_t data)
 110 {
 111   hx8340bWriteData((data>>8) & 0xFF);
 112   hx8340bWriteData(data & 0xFF);
 113 }
 114
 115 /*************************************************/
 116 void hx8340bWriteRegister(uint8_t reg, uint8_t value)
 117 {
 118   hx8340bWriteCmd(reg);
 119   hx8340bWriteCmd(value);
 120 }
 121
 122 /*************************************************/
 123 void hx8340bInitDisplay(void)
 124 {
 125 #if defined HX8340B_ICVERSION_T
 126   // Power Settings
 127   hx8340bWriteRegister(HX8340B_OSCCONTROLA, 0x02);        // 0x18: Frequency = 100% (60fps)
 128   hx8340bWriteRegister(HX8340B_OSCCONTROLB, 0x00);        // 0x21: Disable Internal Oscillator
 129   hx8340bWriteRegister(HX8340B_VCOMCONTROL1, 0x30);       // 0x23: VCOM Offset voltage
 130   hx8340bWriteRegister(HX8340B_VCOMCONTROL2, 0x36);       // 0x24: VCOM High Voltage
 131   hx8340bWriteRegister(HX8340B_VCOMCONTROL3, 0x1a);       // 0x25: VCOM Low Voltage
 132
 133   // Power Supply Settings
 134   hx8340bWriteRegister(HX8340B_OSCCONTROLA, 0x44);        // 0x18: Frequency = 100% (60fps) (Internal 2.52MHz RC oscillator is +/-5% and made need to be tuned)
 135   hx8340bWriteRegister(HX8340B_OSCCONTROLB, 0x01);        // 0x21: Enable Internal Oscillator
 136   hx8340bWriteRegister(HX8340B_DISPLAYMODECONTROL, 0x00); // 0x01: Partial mode off, Sleep off, Scroll off, Invert off, Idle off
 137   hx8340bWriteRegister(HX8340B_MEMACCESSCONTROL, 0x08);   // 0x16: Read/Write scanning direction and color order (0x08 = BGR, 0x00 = RGB)
 138   hx8340bWriteRegister(HX8340B_COLMOD, 0x55);             // 0x17: RGB Data Format - 0x55 = 16bpp, 0x66 = 18bpp
 139   hx8340bWriteRegister(HX8340B_POWERCONTROL5, 0x03);      // 0x1C: Current driving the power-supply op-amp, 0x03 = medium
 140   hx8340bWriteRegister(HX8340B_POWERCONTROL1, 0x06);      // 0x19: B0 = DDVDH Step-up on/off, B1 = VGH/VGL step-up off/on, B2 = VCL step-up off/on (0x06 = all on)
 141   systickDelay(6);
 142
 143   // Driving Settings
 144   hx8340bWriteRegister(HX8340B_POWERCONTROL_INT1, 0x00);  // 0x60
 145   hx8340bWriteRegister(HX8340B_POWERCONTROL_INT2, 0x06);  // 0x61
 146   hx8340bWriteRegister(HX8340B_SOURCECONTROL_INT1, 0x00); // 0x62
 147   hx8340bWriteRegister(HX8340B_SOURCECONTROL_INT2, 0xC8); // 0x63
 148
 149   // Gamma Settings
 150   hx8340bWriteRegister(0x40,0x70);
 151   hx8340bWriteRegister(0x41,0x51);
 152   hx8340bWriteRegister(0x42,0x36);
 153   hx8340bWriteRegister(0x43,0x04);
 154   hx8340bWriteRegister(0x44,0x3B);
 155   hx8340bWriteRegister(0x45,0x0E);
 156   hx8340bWriteRegister(0x46,0x01);
 157   hx8340bWriteRegister(0x47,0x1D);
 158   hx8340bWriteRegister(0x48,0x09);
 159   hx8340bWriteRegister(0x50,0x72);
 160   hx8340bWriteRegister(0x51,0x20);
 161   hx8340bWriteRegister(0x52,0x60);
 162   hx8340bWriteRegister(0x53,0x01);
 163   hx8340bWriteRegister(0x54,0x33);
 164   hx8340bWriteRegister(0x55,0x0E);
 165   hx8340bWriteRegister(0x56,0x02);
 166   hx8340bWriteRegister(0x57,0x73);
 167   hx8340bWriteRegister(HX8340B_DISPLAYCONTROL1, 0x84);  // 0x26: B3 = display off/on (1 = on, 0 = off), also controls gate for VGH/VGL
 168   systickDelay(40);
 169   hx8340bWriteRegister(HX8340B_DISPLAYCONTROL1, 0xB8);  // 0x26: Display on
 170   systickDelay(40);
 171   hx8340bWriteRegister(HX8340B_DISPLAYCONTROL1, 0xBC);
 172
 173   // Set GRAM Area
 174   hx8340bWriteRegister(HX8340B_COLADDR_START2, 0x00);
 175   hx8340bWriteRegister(HX8340B_COLADDR_START1, 0x00);
 176   hx8340bWriteRegister(HX8340B_COLADDR_END2, 0x00);
 177   hx8340bWriteRegister(HX8340B_COLADDR_END1, 0xAF);     // 175
 178   hx8340bWriteRegister(HX8340B_ROWADDR_START2, 0x00);
 179   hx8340bWriteRegister(HX8340B_ROWADDR_START1, 0x00);
 180   hx8340bWriteRegister(HX8340B_ROWADDR_END2, 0x00);
 181   hx8340bWriteRegister(HX8340B_ROWADDR_END1, 0xDB);     // 219
 182
 183   hx8340bWriteCmd(HX8340B_SRAMWRITECONTROL);
 184 #endif
 185
 186 #if defined HX8340B_ICVERSION_N
 187   hx8340bWriteCmd(HX8340B_N_SETEXTCMD);
 188   hx8340bWriteData(0xFF);
 189   hx8340bWriteData(0x83);
 190   hx8340bWriteData(0x40);
 191
 192   hx8340bWriteCmd(HX8340B_N_SPLOUT);
 193   systickDelay(100);
 194
 195   hx8340bWriteCmd(0xCA);                  // Undocumented register?
 196   hx8340bWriteData(0x70);
 197   hx8340bWriteData(0x00);
 198   hx8340bWriteData(0xD9);
 199   hx8340bWriteData(0x01);
 200   hx8340bWriteData(0x11);
 201
 202   hx8340bWriteCmd(0xC9);                  // Undocumented register?
 203   hx8340bWriteData(0x90);
 204   hx8340bWriteData(0x49);
 205   hx8340bWriteData(0x10);
 206   hx8340bWriteData(0x28);
 207   hx8340bWriteData(0x28);
 208   hx8340bWriteData(0x10);
 209   hx8340bWriteData(0x00);
 210   hx8340bWriteData(0x06);
 211   systickDelay(20);
 212
 213   hx8340bWriteCmd(HX8340B_N_SETGAMMAP);
 214   hx8340bWriteData(0x60);
 215   hx8340bWriteData(0x71);
 216   hx8340bWriteData(0x01);
 217   hx8340bWriteData(0x0E);
 218   hx8340bWriteData(0x05);
 219   hx8340bWriteData(0x02);
 220   hx8340bWriteData(0x09);
 221   hx8340bWriteData(0x31);
 222   hx8340bWriteData(0x0A);
 223
 224   hx8340bWriteCmd(HX8340B_N_SETGAMMAN);
 225   hx8340bWriteData(0x67);
 226   hx8340bWriteData(0x30);
 227   hx8340bWriteData(0x61);
 228   hx8340bWriteData(0x17);
 229   hx8340bWriteData(0x48);
 230   hx8340bWriteData(0x07);
 231   hx8340bWriteData(0x05);
 232   hx8340bWriteData(0x33);
 233   systickDelay(10);
 234
 235   hx8340bWriteCmd(HX8340B_N_SETPWCTR5);
 236   hx8340bWriteData(0x35);
 237   hx8340bWriteData(0x20);
 238   hx8340bWriteData(0x45);
 239
 240   hx8340bWriteCmd(HX8340B_N_SETPWCTR4);
 241   hx8340bWriteData(0x33);
 242   hx8340bWriteData(0x25);
 243   hx8340bWriteData(0x4c);
 244   systickDelay(10);
 245
 246   hx8340bWriteCmd(HX8340B_N_COLMOD);      // Color Mode
 247   hx8340bWriteData(0x05);                 // 0x05 = 16bpp, 0x06 = 18bpp
 248
 249   hx8340bWriteCmd(HX8340B_N_DISPON);
 250   systickDelay(10);
 251
 252   hx8340bWriteCmd(HX8340B_N_CASET);
 253   hx8340bWriteData(0x00);
 254   hx8340bWriteData(0x00);
 255   hx8340bWriteData(0x00);
 256   hx8340bWriteData(0xaf);                 // 175
 257
 258   hx8340bWriteCmd(HX8340B_N_PASET);
 259   hx8340bWriteData(0x00);
 260   hx8340bWriteData(0x00);
 261   hx8340bWriteData(0x00);
 262   hx8340bWriteData(0xdb);                // 219
 263
 264   hx8340bWriteCmd(HX8340B_N_RAMWR);
 265 #endif
 266 }
 267
 268 /*************************************************/
 269 void hx8340bHome(void)
 270 {
 271 #if defined HX8340B_ICVERSION_N
 272    hx8340bWriteCmd(HX8340B_N_CASET);
 273    hx8340bWriteData(0x00);
 274    hx8340bWriteData(0x00);
 275    hx8340bWriteData(0x00);
 276    hx8340bWriteData(0xaf);
 277    hx8340bWriteCmd(HX8340B_N_PASET);
 278    hx8340bWriteData(0x00);
 279    hx8340bWriteData(0x00);
 280    hx8340bWriteData(0x00);
 281    hx8340bWriteData(0xdb);
 282 #endif
 283 }
 284
 285 /*************************************************/
 286 static inline void hx8340bSetPosition(uint32_t x0, uint32_t y0, uint32_t x1, uint32_t y1)
 287 {
 288 #if defined HX8340B_ICVERSION_N
 289   hx8340bWriteCmd(HX8340B_N_CASET);
 290   hx8340bWriteData(x0>>8);
 291   hx8340bWriteData(x0);
 292   hx8340bWriteData(x1>>8);
 293   hx8340bWriteData(x1);
 294
 295   hx8340bWriteCmd(HX8340B_N_PASET);
 296   hx8340bWriteData(y0>>8);
 297   hx8340bWriteData(y0);
 298   hx8340bWriteData(y1>>8);
 299   hx8340bWriteData(y1);
 300
 301   hx8340bWriteCmd(HX8340B_N_RAMWR);
 302 #endif
 303 }
 304
 305 /*************************************************/
 306 /* Public Methods                                */
 307 /*************************************************/
 308
 309 /*************************************************/
 310 void lcdInit(void)
 311 {
 312   // Set control pins to output
 313   gpioSetDir(HX8340B_PORT, HX8340B_SDI_PIN, 1);
 314   gpioSetDir(HX8340B_PORT, HX8340B_SCL_PIN, 1);
 315   gpioSetDir(HX8340B_PORT, HX8340B_CS_PIN, 1);
 316   gpioSetDir(HX8340B_PORT, HX8340B_RES_PIN, 1);
 317   gpioSetDir(HX8340B_PORT, HX8340B_BL_PIN, 1);
 318
 319   // Set pins low by default (except reset)
 320   CLR_SDI;
 321   CLR_SCL;
 322   CLR_CS;
 323   CLR_BL;
 324   SET_RES;
 325
 326   // Turn backlight on
 327   lcdBacklight(TRUE);
 328
 329   // Reset display
 330   SET_RES;
 331   systickDelay(100);
 332   CLR_RES;
 333   systickDelay(50);
 334   SET_RES;
 335   systickDelay(50);
 336
 337   // Run LCD init sequence
 338   hx8340bInitDisplay();
 339
 340   // Fill black
 341   lcdFillRGB(COLOR_BLACK);
 342 }
 343
 344 /*************************************************/
 345 void lcdBacklight(bool state)
 346 {
 347   // Set the backlight
 348   // Note: Depending on the type of transistor used
 349   // to control the backlight, you made need to invert
 350   // the values below
 351   if (state)
 352     // CLR_BL;
 353     SET_BL;
 354   else
 355     // SET_BL;
 356     CLR_BL;
 357 }
 358
 359 /*************************************************/
 360 void lcdTest(void)
 361 {
 362 #if defined HX8340B_ICVERSION_N
 363   lcdFillRGB(COLOR_GREEN);
 364 #endif
 365 }
 366
 367 /*************************************************/
 368 void lcdFillRGB(uint16_t color)
 369 {
 370 #if defined HX8340B_ICVERSION_N
 371   uint8_t i,j;
 372   for (i=0;i<220;i++)
 373   {
 374     for (j=0;j<176;j++)
 375     {
 376       hx8340bWriteData16(color);
 377     }
 378   }
 379 #endif
 380 }
 381
 382 /*************************************************/
 383 void lcdDrawPixel(uint16_t x, uint16_t y, uint16_t color)
 384 {
 385   hx8340bSetPosition(x, y, x+1, y+1);
 386   hx8340bWriteData16(color);
 387 }
 388
 389 /**************************************************************************/
 390 /*!
 391     @brief  Draws an array of consecutive RGB565 pixels (much
 392             faster than addressing each pixel individually)
 393 */
 394 /**************************************************************************/
 395 void lcdDrawPixels(uint16_t x, uint16_t y, uint16_t *data, uint32_t len)
 396 {
 397   // ToDo: Optimise this function ... currently only a placeholder
 398   uint32_t i = 0;
 399   do
 400   {
 401     lcdDrawPixel(x+i, y, data[i]);
 402     i++;
 403   } while (i<len);
 404 }
 405
 406 /*************************************************/
 407 void lcdDrawHLine(uint16_t x0, uint16_t x1, uint16_t y, uint16_t color)
 408 {
 409   // Allows for slightly better performance than setting individual pixels
 410   uint16_t x, pixels;
 411
 412   if (x1 < x0)
 413   {
 414     // Switch x1 and x0
 415     x = x1;
 416     x1 = x0;
 417     x0 = x;
 418   }
 419
 420   // Check limits
 421   if (x1 >= lcdGetWidth())
 422   {
 423     x1 = lcdGetWidth() - 1;
 424   }
 425   if (x0 >= lcdGetWidth())
 426   {
 427     x0 = lcdGetWidth() - 1;
 428   }
 429
 430   hx8340bSetPosition(x0, y, x1, y+1);
 431   for (pixels = 0; pixels < x1 - x0 + 1; pixels++)
 432   {
 433     hx8340bWriteData16(color);
 434   }
 435 }
 436
 437 /*************************************************/
 438 void lcdDrawVLine(uint16_t x, uint16_t y0, uint16_t y1, uint16_t color)
 439 {
 440   // Allows for slightly better performance than setting individual pixels
 441   uint16_t y, pixels;
 442
 443   if (y1 < y0)
 444   {
 445     // Switch y1 and y0
 446     y = y1;
 447     y1 = y0;
 448     y0 = y;
 449   }
 450
 451   // Check limits
 452   if (y1 >= lcdGetHeight())
 453   {
 454     y1 = lcdGetHeight() - 1;
 455   }
 456   if (y0 >= lcdGetHeight())
 457   {
 458     y0 = lcdGetHeight() - 1;
 459   }
 460
 461   for (pixels = 0; pixels < y1 - y0 + 1; pixels++)
 462   {
 463     hx8340bSetPosition(x, y0+pixels, x+1, y0+pixels+1);
 464     hx8340bWriteData16(color);
 465   }
 466 }
 467
 468 /*************************************************/
 469 uint16_t lcdGetPixel(uint16_t x, uint16_t y)
 470 {
 471   // ToDo
 472   return 0;
 473 }
 474
 475 /*************************************************/
 476 void lcdSetOrientation(lcdOrientation_t orientation)
 477 {
 478   // ToDo
 479 }
 480
 481 /*************************************************/
 482 lcdOrientation_t lcdGetOrientation(void)
 483 {
 484   return lcdOrientation;
 485 }
 486
 487 /*************************************************/
 488 uint16_t lcdGetWidth(void)
 489 {
 490   return hx8340bProperties.width;
 491 }
 492
 493 /*************************************************/
 494 uint16_t lcdGetHeight(void)
 495 {
 496   return hx8340bProperties.height;
 497 }
 498
 499 /*************************************************/
 500 void lcdScroll(int16_t pixels, uint16_t fillColor)
 501 {
 502   // ToDo
 503 }
 504
 505 /*************************************************/
 506 uint16_t lcdGetControllerID(void)
 507 {
 508   return 0x8340;
 509 }
 510
 511 /*************************************************/
 512 lcdProperties_t lcdGetProperties(void)
 513 {
 514   return hx8340bProperties;
 515 }