Steffen Arntz / TFTLCD

This is a port of Henning Kralsen's UTFT library for Arduino/chipKIT to mbed, refactored to make full use of C inheritance and access control, in order to reduce work when implementing new drivers and at the same time make the code more readable and easier to maintain. As of now supported are SSD1289 (16-bit interface), HX8340-B (serial interface) and ST7735 (serial interface). Drivers for other controllers will be added as time and resources to acquire the displays to test the code permit.

Dependents:   UTFT_SSD1289

Fork of TFTLCD by Todor Todorov

st7735.cpp@9:58b328831d0a, 2012-12-07 (annotated)

Committer:
ttodorov
Date:
Fri Dec 07 16:14:13 2012 +0000
Revision:
9:58b328831d0a
Child:
10:69571adcfad5
- reverted changes for 262K colors, will branch out later; - added ST7735 LCD driver

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 9:58b328831d0a 25 ST7735_LCD::ST7735_LCD( PinName CS, PinName RESET, PinName RS, PinName SCL, PinName SDA, PinName BL )
ttodorov 9:58b328831d0a 26 : LCD( 128, 160, CS, RS, RESET ), _lcd_pin_scl( SCL ), _lcd_pin_sda( SDA )
ttodorov 9:58b328831d0a 27 {
ttodorov 9:58b328831d0a 28 if ( BL != NC ) _lcd_pin_bl = new DigitalOut( BL );
ttodorov 9:58b328831d0a 29 else _lcd_pin_bl = 0;
ttodorov 9:58b328831d0a 30 }
ttodorov 9:58b328831d0a 31
ttodorov 9:58b328831d0a 32 void ST7735_LCD::Initialize( orientation_t orientation )
ttodorov 9:58b328831d0a 33 {
ttodorov 9:58b328831d0a 34 _orientation = orientation;
ttodorov 9:58b328831d0a 35
ttodorov 9:58b328831d0a 36 wait_ms( 100 );
ttodorov 9:58b328831d0a 37 _lcd_pin_reset = HIGH;
ttodorov 9:58b328831d0a 38 wait_ms( 5 );
ttodorov 9:58b328831d0a 39 _lcd_pin_reset = LOW;
ttodorov 9:58b328831d0a 40 wait_ms( 15 );
ttodorov 9:58b328831d0a 41 _lcd_pin_reset = HIGH;
ttodorov 9:58b328831d0a 42 _lcd_pin_cs = HIGH;
ttodorov 9:58b328831d0a 43 _lcd_pin_rs = HIGH;
ttodorov 9:58b328831d0a 44 _lcd_pin_scl = HIGH;
ttodorov 9:58b328831d0a 45 _lcd_pin_sda = HIGH;
ttodorov 9:58b328831d0a 46 if ( _lcd_pin_bl != 0 )
ttodorov 9:58b328831d0a 47 *_lcd_pin_bl = HIGH;
ttodorov 9:58b328831d0a 48 wait_ms( 55 );
ttodorov 9:58b328831d0a 49
ttodorov 9:58b328831d0a 50 Activate();
ttodorov 9:58b328831d0a 51 WriteCmd( 0x01 ); // SW reset
ttodorov 9:58b328831d0a 52 wait_ms( 120 );
ttodorov 9:58b328831d0a 53
ttodorov 9:58b328831d0a 54 WriteCmd( 0x11 ); // sleep out
ttodorov 9:58b328831d0a 55 wait_ms( 120 );
ttodorov 9:58b328831d0a 56
ttodorov 9:58b328831d0a 57 WriteCmd( 0xB1 ); // frame control 1
ttodorov 9:58b328831d0a 58 WriteByteData( 0x01 );
ttodorov 9:58b328831d0a 59 WriteByteData( 0x2C );
ttodorov 9:58b328831d0a 60 WriteByteData( 0x2D );
ttodorov 9:58b328831d0a 61 WriteCmd( 0xB2 ); // frame control 2
ttodorov 9:58b328831d0a 62 WriteByteData( 0x01 );
ttodorov 9:58b328831d0a 63 WriteByteData( 0x2C );
ttodorov 9:58b328831d0a 64 WriteByteData( 0x2D );
ttodorov 9:58b328831d0a 65 WriteCmd( 0xB3 ); // frame control 3
ttodorov 9:58b328831d0a 66 WriteByteData( 0x01 );
ttodorov 9:58b328831d0a 67 WriteByteData( 0x2C );
ttodorov 9:58b328831d0a 68 WriteByteData( 0x2D );
ttodorov 9:58b328831d0a 69 WriteByteData( 0x01 );
ttodorov 9:58b328831d0a 70 WriteByteData( 0x2C );
ttodorov 9:58b328831d0a 71 WriteByteData( 0x2D );
ttodorov 9:58b328831d0a 72
ttodorov 9:58b328831d0a 73 WriteCmd( 0xB4 ); // column inversion
ttodorov 9:58b328831d0a 74 WriteByteData( 0x07 );
ttodorov 9:58b328831d0a 75
ttodorov 9:58b328831d0a 76 // ST7735R Power Sequence
ttodorov 9:58b328831d0a 77 WriteCmd( 0xC0 ); // power control 1
ttodorov 9:58b328831d0a 78 WriteByteData( 0xA2 );
ttodorov 9:58b328831d0a 79 WriteByteData( 0x02 );
ttodorov 9:58b328831d0a 80 WriteByteData( 0x84 );
ttodorov 9:58b328831d0a 81 WriteCmd( 0xC1 ); // power control 2
ttodorov 9:58b328831d0a 82 WriteByteData( 0xC5 );
ttodorov 9:58b328831d0a 83 WriteCmd( 0xC2 ); // power control 3
ttodorov 9:58b328831d0a 84 WriteByteData( 0x0A );
ttodorov 9:58b328831d0a 85 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 86 WriteCmd( 0xC3 ); // power control 4
ttodorov 9:58b328831d0a 87 WriteByteData( 0x8A );
ttodorov 9:58b328831d0a 88 WriteByteData( 0x2A );
ttodorov 9:58b328831d0a 89 WriteCmd( 0xC4 ); // power control 5
ttodorov 9:58b328831d0a 90 WriteByteData( 0x8A );
ttodorov 9:58b328831d0a 91 WriteByteData( 0xEE );
ttodorov 9:58b328831d0a 92
ttodorov 9:58b328831d0a 93 WriteCmd( 0xC5 ); // voltage control 1
ttodorov 9:58b328831d0a 94 WriteByteData( 0x0E );
ttodorov 9:58b328831d0a 95
ttodorov 9:58b328831d0a 96 WriteCmd( 0x36 ); //MX, MY, RGB mode
ttodorov 9:58b328831d0a 97 WriteByteData( 0xC8 );
ttodorov 9:58b328831d0a 98
ttodorov 9:58b328831d0a 99 // ST7735R Gamma Sequence
ttodorov 9:58b328831d0a 100 WriteCmd( 0xE0 ); // gamma positive
ttodorov 9:58b328831d0a 101 WriteByteData( 0x0F );
ttodorov 9:58b328831d0a 102 WriteByteData( 0x1A );
ttodorov 9:58b328831d0a 103 WriteByteData( 0x0F );
ttodorov 9:58b328831d0a 104 WriteByteData( 0x18 );
ttodorov 9:58b328831d0a 105 WriteByteData( 0x2F );
ttodorov 9:58b328831d0a 106 WriteByteData( 0x28 );
ttodorov 9:58b328831d0a 107 WriteByteData( 0x20 );
ttodorov 9:58b328831d0a 108 WriteByteData( 0x22 );
ttodorov 9:58b328831d0a 109 WriteByteData( 0x1F );
ttodorov 9:58b328831d0a 110 WriteByteData( 0x1B );
ttodorov 9:58b328831d0a 111 WriteByteData( 0x23 );
ttodorov 9:58b328831d0a 112 WriteByteData( 0x37 );
ttodorov 9:58b328831d0a 113 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 114 WriteByteData( 0x07 );
ttodorov 9:58b328831d0a 115 WriteByteData( 0x02 );
ttodorov 9:58b328831d0a 116 WriteByteData( 0x10 );
ttodorov 9:58b328831d0a 117 WriteCmd( 0xE1 ); // gamma negative
ttodorov 9:58b328831d0a 118 WriteByteData( 0x0F );
ttodorov 9:58b328831d0a 119 WriteByteData( 0x1B );
ttodorov 9:58b328831d0a 120 WriteByteData( 0x0F );
ttodorov 9:58b328831d0a 121 WriteByteData( 0x17 );
ttodorov 9:58b328831d0a 122 WriteByteData( 0x33 );
ttodorov 9:58b328831d0a 123 WriteByteData( 0x2C );
ttodorov 9:58b328831d0a 124 WriteByteData( 0x29 );
ttodorov 9:58b328831d0a 125 WriteByteData( 0x2E );
ttodorov 9:58b328831d0a 126 WriteByteData( 0x30 );
ttodorov 9:58b328831d0a 127 WriteByteData( 0x30 );
ttodorov 9:58b328831d0a 128 WriteByteData( 0x39 );
ttodorov 9:58b328831d0a 129 WriteByteData( 0x3F );
ttodorov 9:58b328831d0a 130 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 131 WriteByteData( 0x07 );
ttodorov 9:58b328831d0a 132 WriteByteData( 0x03 );
ttodorov 9:58b328831d0a 133 WriteByteData( 0x10 );
ttodorov 9:58b328831d0a 134
ttodorov 9:58b328831d0a 135 WriteCmd( 0x2A ); // set column address
ttodorov 9:58b328831d0a 136 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 137 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 138 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 139 WriteByteData( 0x7F );
ttodorov 9:58b328831d0a 140 WriteCmd( 0x2B ); // set row address
ttodorov 9:58b328831d0a 141 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 142 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 143 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 144 WriteByteData( 0x9F );
ttodorov 9:58b328831d0a 145
ttodorov 9:58b328831d0a 146 WriteCmd( 0xF0 ); // enable extensions command
ttodorov 9:58b328831d0a 147 WriteByteData( 0x01 );
ttodorov 9:58b328831d0a 148 WriteCmd( 0xF6 ); // disable ram power save mode
ttodorov 9:58b328831d0a 149 WriteByteData( 0x00 );
ttodorov 9:58b328831d0a 150
ttodorov 9:58b328831d0a 151 WriteCmd( 0x3A ); // interface pixel format (color mode)
ttodorov 9:58b328831d0a 152 WriteByteData( 0x05 ); // 65k mode
ttodorov 9:58b328831d0a 153 WriteCmd( 0x29 ); // display on
ttodorov 9:58b328831d0a 154
ttodorov 9:58b328831d0a 155 Deactivate();
ttodorov 9:58b328831d0a 156 }
ttodorov 9:58b328831d0a 157
ttodorov 9:58b328831d0a 158 void ST7735_LCD::Sleep( void )
ttodorov 9:58b328831d0a 159 {
ttodorov 9:58b328831d0a 160 Activate();
ttodorov 9:58b328831d0a 161 WriteCmd( 0x28 );
ttodorov 9:58b328831d0a 162 wait_ms( 10 );
ttodorov 9:58b328831d0a 163 WriteCmd( 0x10 );
ttodorov 9:58b328831d0a 164 wait_ms( 125 );
ttodorov 9:58b328831d0a 165 if ( _lcd_pin_bl != 0 )
ttodorov 9:58b328831d0a 166 *_lcd_pin_bl = LOW;
ttodorov 9:58b328831d0a 167 Deactivate();
ttodorov 9:58b328831d0a 168 }
ttodorov 9:58b328831d0a 169
ttodorov 9:58b328831d0a 170 void ST7735_LCD::WakeUp( void )
ttodorov 9:58b328831d0a 171 {
ttodorov 9:58b328831d0a 172 Activate();
ttodorov 9:58b328831d0a 173 WriteCmd( 0x29 );
ttodorov 9:58b328831d0a 174 wait_ms( 10 );
ttodorov 9:58b328831d0a 175 WriteCmd( 0x11 );
ttodorov 9:58b328831d0a 176 wait_ms( 125 );
ttodorov 9:58b328831d0a 177 if ( _lcd_pin_bl != 0 )
ttodorov 9:58b328831d0a 178 *_lcd_pin_bl = HIGH;
ttodorov 9:58b328831d0a 179 Deactivate();
ttodorov 9:58b328831d0a 180 }
ttodorov 9:58b328831d0a 181
ttodorov 9:58b328831d0a 182 void ST7735_LCD::WriteCmd( unsigned short cmd )
ttodorov 9:58b328831d0a 183 {
ttodorov 9:58b328831d0a 184 _lcd_pin_rs = LOW;
ttodorov 9:58b328831d0a 185 serializeByte( cmd & 0xFF );
ttodorov 9:58b328831d0a 186 }
ttodorov 9:58b328831d0a 187
ttodorov 9:58b328831d0a 188 void ST7735_LCD::WriteData( unsigned short data )
ttodorov 9:58b328831d0a 189 {
ttodorov 9:58b328831d0a 190 _lcd_pin_rs = HIGH;
ttodorov 9:58b328831d0a 191 serializeByte( ( data >> 8 ) & 0xFF );
ttodorov 9:58b328831d0a 192 serializeByte( data & 0xFF );
ttodorov 9:58b328831d0a 193 }
ttodorov 9:58b328831d0a 194
ttodorov 9:58b328831d0a 195 void ST7735_LCD::WriteByteData( unsigned char data )
ttodorov 9:58b328831d0a 196 {
ttodorov 9:58b328831d0a 197 _lcd_pin_rs = HIGH;
ttodorov 9:58b328831d0a 198 serializeByte( data );
ttodorov 9:58b328831d0a 199 }
ttodorov 9:58b328831d0a 200
ttodorov 9:58b328831d0a 201 void ST7735_LCD::SetXY( uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2 )
ttodorov 9:58b328831d0a 202 {
ttodorov 9:58b328831d0a 203 if ( _orientation == LANDSCAPE )
ttodorov 9:58b328831d0a 204 {
ttodorov 9:58b328831d0a 205 swap( uint16_t, x1, y1 )
ttodorov 9:58b328831d0a 206 swap( uint16_t, x2, y2 )
ttodorov 9:58b328831d0a 207 y1 = _disp_height - y1;
ttodorov 9:58b328831d0a 208 y2 = _disp_height - y2;
ttodorov 9:58b328831d0a 209 swap( uint16_t, y1, y2 )
ttodorov 9:58b328831d0a 210 }
ttodorov 9:58b328831d0a 211
ttodorov 9:58b328831d0a 212 WriteCmdData( 0x2a, x1 );
ttodorov 9:58b328831d0a 213 WriteData( x2 );
ttodorov 9:58b328831d0a 214 WriteCmdData( 0x2b, y1 );
ttodorov 9:58b328831d0a 215 WriteData( y2 );
ttodorov 9:58b328831d0a 216 WriteCmd( 0x2c );
ttodorov 9:58b328831d0a 217 }
ttodorov 9:58b328831d0a 218
ttodorov 9:58b328831d0a 219 void ST7735_LCD::serializeByte( unsigned char data )
ttodorov 9:58b328831d0a 220 {
ttodorov 9:58b328831d0a 221 for ( int i = 0; i < 8; i++ )
ttodorov 9:58b328831d0a 222 {
ttodorov 9:58b328831d0a 223 if ( data & 0x80 ) _lcd_pin_sda = HIGH;
ttodorov 9:58b328831d0a 224 else _lcd_pin_sda = LOW;
ttodorov 9:58b328831d0a 225 pulseLow( _lcd_pin_scl );
ttodorov 9:58b328831d0a 226 data = data << 1;
ttodorov 9:58b328831d0a 227 }
ttodorov 9:58b328831d0a 228 }