madhu sudhana / Mbed OS newTFTLCD_

1.44 tft lcd display

Dependencies:   TFT_fonts mbed-os

Fork of newTFTLCD by madhu sudhana

st7735.cpp@22:4c169297f374, 2013-01-26 (annotated)

Committer:
ttodorov
Date:
Sat Jan 26 04:36:46 2013 +0000
Revision:
22:4c169297f374
Parent:
20:4bdca8d8dadc
Child:
28:6ac2fa56f82c
- added PWM backlight control

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ttodorov 9:58b328831d0a 1 /*
ttodorov 9:58b328831d0a 2 * Copyright (C)2010-2012 Henning Karlsen. All right reserved.
ttodorov 9:58b328831d0a 3 * Copyright (C)2012 Todor Todorov.
ttodorov 9:58b328831d0a 4 *
ttodorov 9:58b328831d0a 5 * This library is free software; you can redistribute it and/or
ttodorov 9:58b328831d0a 6 * modify it under the terms of the GNU Lesser General Public
ttodorov 9:58b328831d0a 7 * License as published by the Free Software Foundation; either
ttodorov 9:58b328831d0a 8 * version 2.1 of the License, or (at your option) any later version.
ttodorov 9:58b328831d0a 9 *
ttodorov 9:58b328831d0a 10 * This library is distributed in the hope that it will be useful,
ttodorov 9:58b328831d0a 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
ttodorov 9:58b328831d0a 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ttodorov 9:58b328831d0a 13 * Lesser General Public License for more details.
ttodorov 9:58b328831d0a 14 *
ttodorov 9:58b328831d0a 15 * You should have received a copy of the GNU Lesser General Public
ttodorov 9:58b328831d0a 16 * License along with this library; if not, write to:
ttodorov 9:58b328831d0a 17 *
ttodorov 9:58b328831d0a 18 * Free Software Foundation, Inc.
ttodorov 9:58b328831d0a 19 * 51 Franklin St, 5th Floor, Boston, MA 02110-1301, USA
ttodorov 9:58b328831d0a 20 *
ttodorov 9:58b328831d0a 21 *********************************************************************/
ttodorov 9:58b328831d0a 22 #include "st7735.h"
ttodorov 9:58b328831d0a 23 #include "helpers.h"
ttodorov 9:58b328831d0a 24
ttodorov 22:4c169297f374 25 ST7735_LCD::ST7735_LCD( PinName CS, PinName RESET, PinName RS, PinName SCL, PinName SDA, PinName BL, backlight_t blType, float defaultBackLightLevel )
ttodorov 22:4c169297f374 26 : LCD( 128, 160, CS, RS, RESET, BL, blType, defaultBackLightLevel ), _lcd_pin_scl( SCL ), _lcd_pin_sda( SDA )
ttodorov 9:58b328831d0a 27 {
ttodorov 9:58b328831d0a 28 }
ttodorov 9:58b328831d0a 29
ttodorov 12:d0978272a340 30 void ST7735_LCD::Initialize( orientation_t orientation, colordepth_t colors )
ttodorov 9:58b328831d0a 31 {
ttodorov 9:58b328831d0a 32 _orientation = orientation;
ttodorov 12:d0978272a340 33 _colorDepth = colors;
ttodorov 9:58b328831d0a 34
ttodorov 9:58b328831d0a 35 wait_ms( 100 );
ttodorov 9:58b328831d0a 36 _lcd_pin_reset = HIGH;
ttodorov 9:58b328831d0a 37 wait_ms( 5 );
ttodorov 9:58b328831d0a 38 _lcd_pin_reset = LOW;
ttodorov 9:58b328831d0a 39 wait_ms( 15 );
ttodorov 9:58b328831d0a 40 _lcd_pin_reset = HIGH;
ttodorov 9:58b328831d0a 41 _lcd_pin_cs = HIGH;
ttodorov 9:58b328831d0a 42 _lcd_pin_rs = HIGH;
ttodorov 9:58b328831d0a 43 _lcd_pin_scl = HIGH;
ttodorov 9:58b328831d0a 44 _lcd_pin_sda = HIGH;
ttodorov 9:58b328831d0a 45 if ( _lcd_pin_bl != 0 )
ttodorov 9:58b328831d0a 46 *_lcd_pin_bl = HIGH;
ttodorov 22:4c169297f374 47 else if ( _bl_pwm != 0 )
ttodorov 22:4c169297f374 48 *_bl_pwm = _bl_pwm_default;
ttodorov 9:58b328831d0a 49 wait_ms( 55 );
ttodorov 9:58b328831d0a 50
ttodorov 9:58b328831d0a 51 Activate();
ttodorov 9:58b328831d0a 52 WriteCmd( 0x01 ); // SW reset
ttodorov 9:58b328831d0a 53 wait_ms( 120 );
ttodorov 9:58b328831d0a 54
ttodorov 9:58b328831d0a 55 WriteCmd( 0x11 ); // sleep out
ttodorov 9:58b328831d0a 56 wait_ms( 120 );
ttodorov 9:58b328831d0a 57
ttodorov 9:58b328831d0a 58 WriteCmd( 0xB1 ); // frame control 1
ttodorov 9:58b328831d0a 59 WriteByteData( 0x01 );
ttodorov 9:58b328831d0a 60 WriteByteData( 0x2C );
ttodorov 9:58b328831d0a 61 WriteByteData( 0x2D );
ttodorov 14:8efbe7361dae 62
ttodorov 9:58b328831d0a 63 WriteCmd( 0xB2 ); // frame control 2
ttodorov 9:58b328831d0a 64 WriteByteData( 0x01 );
ttodorov 9:58b328831d0a 65 WriteByteData( 0x2C );
ttodorov 9:58b328831d0a 66 WriteByteData( 0x2D );
ttodorov 14:8efbe7361dae 67
ttodorov 9:58b328831d0a 68 WriteCmd( 0xB3 ); // frame control 3
ttodorov 9:58b328831d0a 69 WriteByteData( 0x01 );
ttodorov 9:58b328831d0a 70 WriteByteData( 0x2C );
ttodorov 9:58b328831d0a 71 WriteByteData( 0x2D );
ttodorov 9:58b328831d0a 72 WriteByteData( 0x01 );
ttodorov 9:58b328831d0a 73 WriteByteData( 0x2C );
ttodorov 9:58b328831d0a 74 WriteByteData( 0x2D );
ttodorov 9:58b328831d0a 75
ttodorov 9:58b328831d0a 76 WriteCmd( 0xB4 ); // column inversion
ttodorov 14:8efbe7361dae 77 //WriteByteData( 0x07 );
ttodorov 14:8efbe7361dae 78 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 79
ttodorov 9:58b328831d0a 80 // ST7735R Power Sequence
ttodorov 9:58b328831d0a 81 WriteCmd( 0xC0 ); // power control 1
ttodorov 9:58b328831d0a 82 WriteByteData( 0xA2 );
ttodorov 9:58b328831d0a 83 WriteByteData( 0x02 );
ttodorov 9:58b328831d0a 84 WriteByteData( 0x84 );
ttodorov 14:8efbe7361dae 85
ttodorov 9:58b328831d0a 86 WriteCmd( 0xC1 ); // power control 2
ttodorov 9:58b328831d0a 87 WriteByteData( 0xC5 );
ttodorov 14:8efbe7361dae 88
ttodorov 9:58b328831d0a 89 WriteCmd( 0xC2 ); // power control 3
ttodorov 9:58b328831d0a 90 WriteByteData( 0x0A );
ttodorov 9:58b328831d0a 91 WriteByteData( 0x00 );
ttodorov 14:8efbe7361dae 92
ttodorov 9:58b328831d0a 93 WriteCmd( 0xC3 ); // power control 4
ttodorov 9:58b328831d0a 94 WriteByteData( 0x8A );
ttodorov 9:58b328831d0a 95 WriteByteData( 0x2A );
ttodorov 14:8efbe7361dae 96
ttodorov 9:58b328831d0a 97 WriteCmd( 0xC4 ); // power control 5
ttodorov 9:58b328831d0a 98 WriteByteData( 0x8A );
ttodorov 9:58b328831d0a 99 WriteByteData( 0xEE );
ttodorov 9:58b328831d0a 100
ttodorov 9:58b328831d0a 101 WriteCmd( 0xC5 ); // voltage control 1
ttodorov 9:58b328831d0a 102 WriteByteData( 0x0E );
ttodorov 9:58b328831d0a 103
ttodorov 9:58b328831d0a 104 // ST7735R Gamma Sequence
ttodorov 9:58b328831d0a 105 WriteCmd( 0xE0 ); // gamma positive
ttodorov 9:58b328831d0a 106 WriteByteData( 0x0F );
ttodorov 9:58b328831d0a 107 WriteByteData( 0x1A );
ttodorov 9:58b328831d0a 108 WriteByteData( 0x0F );
ttodorov 9:58b328831d0a 109 WriteByteData( 0x18 );
ttodorov 9:58b328831d0a 110 WriteByteData( 0x2F );
ttodorov 9:58b328831d0a 111 WriteByteData( 0x28 );
ttodorov 9:58b328831d0a 112 WriteByteData( 0x20 );
ttodorov 9:58b328831d0a 113 WriteByteData( 0x22 );
ttodorov 9:58b328831d0a 114 WriteByteData( 0x1F );
ttodorov 9:58b328831d0a 115 WriteByteData( 0x1B );
ttodorov 9:58b328831d0a 116 WriteByteData( 0x23 );
ttodorov 9:58b328831d0a 117 WriteByteData( 0x37 );
ttodorov 9:58b328831d0a 118 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 119 WriteByteData( 0x07 );
ttodorov 9:58b328831d0a 120 WriteByteData( 0x02 );
ttodorov 9:58b328831d0a 121 WriteByteData( 0x10 );
ttodorov 14:8efbe7361dae 122
ttodorov 9:58b328831d0a 123 WriteCmd( 0xE1 ); // gamma negative
ttodorov 9:58b328831d0a 124 WriteByteData( 0x0F );
ttodorov 9:58b328831d0a 125 WriteByteData( 0x1B );
ttodorov 9:58b328831d0a 126 WriteByteData( 0x0F );
ttodorov 9:58b328831d0a 127 WriteByteData( 0x17 );
ttodorov 9:58b328831d0a 128 WriteByteData( 0x33 );
ttodorov 9:58b328831d0a 129 WriteByteData( 0x2C );
ttodorov 9:58b328831d0a 130 WriteByteData( 0x29 );
ttodorov 9:58b328831d0a 131 WriteByteData( 0x2E );
ttodorov 9:58b328831d0a 132 WriteByteData( 0x30 );
ttodorov 9:58b328831d0a 133 WriteByteData( 0x30 );
ttodorov 9:58b328831d0a 134 WriteByteData( 0x39 );
ttodorov 9:58b328831d0a 135 WriteByteData( 0x3F );
ttodorov 9:58b328831d0a 136 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 137 WriteByteData( 0x07 );
ttodorov 9:58b328831d0a 138 WriteByteData( 0x03 );
ttodorov 9:58b328831d0a 139 WriteByteData( 0x10 );
ttodorov 9:58b328831d0a 140
ttodorov 9:58b328831d0a 141 WriteCmd( 0x2A ); // set column address
ttodorov 9:58b328831d0a 142 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 143 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 144 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 145 WriteByteData( 0x7F );
ttodorov 14:8efbe7361dae 146
ttodorov 9:58b328831d0a 147 WriteCmd( 0x2B ); // set row address
ttodorov 9:58b328831d0a 148 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 149 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 150 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 151 WriteByteData( 0x9F );
ttodorov 9:58b328831d0a 152
ttodorov 9:58b328831d0a 153 WriteCmd( 0xF0 ); // enable extensions command
ttodorov 9:58b328831d0a 154 WriteByteData( 0x01 );
ttodorov 14:8efbe7361dae 155
ttodorov 9:58b328831d0a 156 WriteCmd( 0xF6 ); // disable ram power save mode
ttodorov 9:58b328831d0a 157 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 158
ttodorov 12:d0978272a340 159 WriteCmd( 0x3A ); // interface pixel format (color mode): 0x05 => RGB16, 0x06 => RGB18
ttodorov 12:d0978272a340 160 WriteByteData( _colorDepth == RGB16 ? 0x05 : 0x06 );
ttodorov 14:8efbe7361dae 161
ttodorov 14:8efbe7361dae 162 WriteCmd( 0x36 ); //MX, MY, RGB mode
ttodorov 14:8efbe7361dae 163 switch ( _orientation )
ttodorov 14:8efbe7361dae 164 {
ttodorov 20:4bdca8d8dadc 165 case LANDSCAPE: WriteByteData( 0x6C ); break;
ttodorov 14:8efbe7361dae 166 case PORTRAIT_REV: WriteByteData( 0xDC ); break;
ttodorov 20:4bdca8d8dadc 167 case LANDSCAPE_REV: WriteByteData( 0xB8 ); break;
ttodorov 14:8efbe7361dae 168 case PORTRAIT:
ttodorov 14:8efbe7361dae 169 default: WriteByteData( 0x08 ); break;
ttodorov 14:8efbe7361dae 170 }
ttodorov 14:8efbe7361dae 171
ttodorov 9:58b328831d0a 172 WriteCmd( 0x29 ); // display on
ttodorov 9:58b328831d0a 173
ttodorov 9:58b328831d0a 174 Deactivate();
ttodorov 9:58b328831d0a 175 }
ttodorov 9:58b328831d0a 176
ttodorov 9:58b328831d0a 177 void ST7735_LCD::Sleep( void )
ttodorov 9:58b328831d0a 178 {
ttodorov 9:58b328831d0a 179 Activate();
ttodorov 9:58b328831d0a 180 WriteCmd( 0x28 );
ttodorov 9:58b328831d0a 181 wait_ms( 10 );
ttodorov 9:58b328831d0a 182 WriteCmd( 0x10 );
ttodorov 9:58b328831d0a 183 wait_ms( 125 );
ttodorov 22:4c169297f374 184 LCD::Sleep();
ttodorov 9:58b328831d0a 185 Deactivate();
ttodorov 9:58b328831d0a 186 }
ttodorov 9:58b328831d0a 187
ttodorov 9:58b328831d0a 188 void ST7735_LCD::WakeUp( void )
ttodorov 9:58b328831d0a 189 {
ttodorov 9:58b328831d0a 190 Activate();
ttodorov 9:58b328831d0a 191 WriteCmd( 0x29 );
ttodorov 9:58b328831d0a 192 wait_ms( 10 );
ttodorov 9:58b328831d0a 193 WriteCmd( 0x11 );
ttodorov 9:58b328831d0a 194 wait_ms( 125 );
ttodorov 22:4c169297f374 195 LCD::WakeUp();
ttodorov 9:58b328831d0a 196 Deactivate();
ttodorov 9:58b328831d0a 197 }
ttodorov 9:58b328831d0a 198
ttodorov 9:58b328831d0a 199 void ST7735_LCD::WriteCmd( unsigned short cmd )
ttodorov 9:58b328831d0a 200 {
ttodorov 9:58b328831d0a 201 _lcd_pin_rs = LOW;
ttodorov 9:58b328831d0a 202 serializeByte( cmd & 0xFF );
ttodorov 9:58b328831d0a 203 }
ttodorov 9:58b328831d0a 204
ttodorov 9:58b328831d0a 205 void ST7735_LCD::WriteData( unsigned short data )
ttodorov 9:58b328831d0a 206 {
ttodorov 9:58b328831d0a 207 _lcd_pin_rs = HIGH;
ttodorov 9:58b328831d0a 208 serializeByte( ( data >> 8 ) & 0xFF );
ttodorov 9:58b328831d0a 209 serializeByte( data & 0xFF );
ttodorov 9:58b328831d0a 210 }
ttodorov 9:58b328831d0a 211
ttodorov 9:58b328831d0a 212 void ST7735_LCD::WriteByteData( unsigned char data )
ttodorov 9:58b328831d0a 213 {
ttodorov 9:58b328831d0a 214 _lcd_pin_rs = HIGH;
ttodorov 9:58b328831d0a 215 serializeByte( data );
ttodorov 9:58b328831d0a 216 }
ttodorov 9:58b328831d0a 217
ttodorov 20:4bdca8d8dadc 218 void ST7735_LCD::SetXY( unsigned short x1, unsigned short y1, unsigned short x2, unsigned short y2 )
ttodorov 9:58b328831d0a 219 {
ttodorov 9:58b328831d0a 220 WriteCmdData( 0x2a, x1 );
ttodorov 9:58b328831d0a 221 WriteData( x2 );
ttodorov 9:58b328831d0a 222 WriteCmdData( 0x2b, y1 );
ttodorov 9:58b328831d0a 223 WriteData( y2 );
ttodorov 9:58b328831d0a 224 WriteCmd( 0x2c );
ttodorov 9:58b328831d0a 225 }
ttodorov 9:58b328831d0a 226
ttodorov 20:4bdca8d8dadc 227 void ST7735_LCD::SetPixelColor( unsigned int color, colordepth_t mode )
ttodorov 10:69571adcfad5 228 {
ttodorov 20:4bdca8d8dadc 229 unsigned char r = 0, g = 0, b = 0;
ttodorov 20:4bdca8d8dadc 230 unsigned short clr;
ttodorov 12:d0978272a340 231 if ( _colorDepth == RGB16 )
ttodorov 12:d0978272a340 232 {
ttodorov 20:4bdca8d8dadc 233 switch ( mode )
ttodorov 20:4bdca8d8dadc 234 {
ttodorov 20:4bdca8d8dadc 235 case RGB16:
ttodorov 20:4bdca8d8dadc 236 WriteData( color & 0xFFFF );
ttodorov 20:4bdca8d8dadc 237 break;
ttodorov 20:4bdca8d8dadc 238 case RGB18:
ttodorov 20:4bdca8d8dadc 239 r = ( color >> 10 ) & 0xF8;
ttodorov 20:4bdca8d8dadc 240 g = ( color >> 4 ) & 0xFC;
ttodorov 20:4bdca8d8dadc 241 b = ( color >> 1 ) & 0x1F;
ttodorov 20:4bdca8d8dadc 242 clr = ( ( r | ( g >> 5 ) ) << 8 ) | ( ( g << 3 ) | b );
ttodorov 20:4bdca8d8dadc 243 WriteData( clr );
ttodorov 20:4bdca8d8dadc 244 break;
ttodorov 20:4bdca8d8dadc 245 case RGB24:
ttodorov 20:4bdca8d8dadc 246 r = ( color >> 16 ) & 0xF8;
ttodorov 20:4bdca8d8dadc 247 g = ( color >> 8 ) & 0xFC;
ttodorov 20:4bdca8d8dadc 248 b = color & 0xF8;
ttodorov 20:4bdca8d8dadc 249 clr = ( ( r | ( g >> 5 ) ) << 8 ) | ( ( g << 3 ) | ( b >> 3 ) );
ttodorov 20:4bdca8d8dadc 250 WriteData( clr );
ttodorov 20:4bdca8d8dadc 251 break;
ttodorov 20:4bdca8d8dadc 252 }
ttodorov 12:d0978272a340 253 }
ttodorov 15:af3cd35886fb 254 else if ( _colorDepth == RGB18 )
ttodorov 12:d0978272a340 255 {
ttodorov 20:4bdca8d8dadc 256 switch ( mode )
ttodorov 20:4bdca8d8dadc 257 {
ttodorov 20:4bdca8d8dadc 258 case RGB16:
ttodorov 20:4bdca8d8dadc 259 r = ( ( color >> 8 ) & 0xF8 ) | ( ( color & 0x8000 ) >> 13 );
ttodorov 20:4bdca8d8dadc 260 g = ( color >> 3 ) & 0xFC;
ttodorov 20:4bdca8d8dadc 261 b = ( ( color << 3 ) & 0xFC ) | ( ( color >> 3 ) & 0x01 );
ttodorov 20:4bdca8d8dadc 262 break;
ttodorov 20:4bdca8d8dadc 263 case RGB18:
ttodorov 20:4bdca8d8dadc 264 b = ( color << 2 ) & 0xFC;
ttodorov 20:4bdca8d8dadc 265 g = ( color >> 4 ) & 0xFC;
ttodorov 20:4bdca8d8dadc 266 r = ( color >> 10 ) & 0xFC;
ttodorov 20:4bdca8d8dadc 267 break;
ttodorov 20:4bdca8d8dadc 268 case RGB24:
ttodorov 20:4bdca8d8dadc 269 r = ( color >> 16 ) & 0xFC;
ttodorov 20:4bdca8d8dadc 270 g = ( color >> 8 ) & 0xFC;
ttodorov 20:4bdca8d8dadc 271 b = color & 0xFC;
ttodorov 20:4bdca8d8dadc 272 break;
ttodorov 20:4bdca8d8dadc 273 }
ttodorov 20:4bdca8d8dadc 274 WriteByteData( r );
ttodorov 20:4bdca8d8dadc 275 WriteByteData( g );
ttodorov 20:4bdca8d8dadc 276 WriteByteData( b );
ttodorov 12:d0978272a340 277 }
ttodorov 10:69571adcfad5 278 }
ttodorov 10:69571adcfad5 279
ttodorov 9:58b328831d0a 280 void ST7735_LCD::serializeByte( unsigned char data )
ttodorov 9:58b328831d0a 281 {
ttodorov 9:58b328831d0a 282 for ( int i = 0; i < 8; i++ )
ttodorov 9:58b328831d0a 283 {
ttodorov 9:58b328831d0a 284 if ( data & 0x80 ) _lcd_pin_sda = HIGH;
ttodorov 9:58b328831d0a 285 else _lcd_pin_sda = LOW;
ttodorov 9:58b328831d0a 286 pulseLow( _lcd_pin_scl );
ttodorov 9:58b328831d0a 287 data = data << 1;
ttodorov 9:58b328831d0a 288 }
ttodorov 9:58b328831d0a 289 }