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1.44 tft lcd display
Dependencies: TFT_fonts mbed-os
Fork of newTFTLCD by
Diff: st7735.cpp
- Revision:
- 9:58b328831d0a
- Child:
- 10:69571adcfad5
diff -r 7a4791dbb065 -r 58b328831d0a st7735.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/st7735.cpp Fri Dec 07 16:14:13 2012 +0000 @@ -0,0 +1,228 @@ +/* + * Copyright (C)2010-2012 Henning Karlsen. All right reserved. + * Copyright (C)2012 Todor Todorov. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to: + * + * Free Software Foundation, Inc. + * 51 Franklin St, 5th Floor, Boston, MA 02110-1301, USA + * + *********************************************************************/ +#include "st7735.h" +#include "helpers.h" + +ST7735_LCD::ST7735_LCD( PinName CS, PinName RESET, PinName RS, PinName SCL, PinName SDA, PinName BL ) + : LCD( 128, 160, CS, RS, RESET ), _lcd_pin_scl( SCL ), _lcd_pin_sda( SDA ) +{ + if ( BL != NC ) _lcd_pin_bl = new DigitalOut( BL ); + else _lcd_pin_bl = 0; +} + +void ST7735_LCD::Initialize( orientation_t orientation ) +{ + _orientation = orientation; + + wait_ms( 100 ); + _lcd_pin_reset = HIGH; + wait_ms( 5 ); + _lcd_pin_reset = LOW; + wait_ms( 15 ); + _lcd_pin_reset = HIGH; + _lcd_pin_cs = HIGH; + _lcd_pin_rs = HIGH; + _lcd_pin_scl = HIGH; + _lcd_pin_sda = HIGH; + if ( _lcd_pin_bl != 0 ) + *_lcd_pin_bl = HIGH; + wait_ms( 55 ); + + Activate(); + WriteCmd( 0x01 ); // SW reset + wait_ms( 120 ); + + WriteCmd( 0x11 ); // sleep out + wait_ms( 120 ); + + WriteCmd( 0xB1 ); // frame control 1 + WriteByteData( 0x01 ); + WriteByteData( 0x2C ); + WriteByteData( 0x2D ); + WriteCmd( 0xB2 ); // frame control 2 + WriteByteData( 0x01 ); + WriteByteData( 0x2C ); + WriteByteData( 0x2D ); + WriteCmd( 0xB3 ); // frame control 3 + WriteByteData( 0x01 ); + WriteByteData( 0x2C ); + WriteByteData( 0x2D ); + WriteByteData( 0x01 ); + WriteByteData( 0x2C ); + WriteByteData( 0x2D ); + + WriteCmd( 0xB4 ); // column inversion + WriteByteData( 0x07 ); + + // ST7735R Power Sequence + WriteCmd( 0xC0 ); // power control 1 + WriteByteData( 0xA2 ); + WriteByteData( 0x02 ); + WriteByteData( 0x84 ); + WriteCmd( 0xC1 ); // power control 2 + WriteByteData( 0xC5 ); + WriteCmd( 0xC2 ); // power control 3 + WriteByteData( 0x0A ); + WriteByteData( 0x00 ); + WriteCmd( 0xC3 ); // power control 4 + WriteByteData( 0x8A ); + WriteByteData( 0x2A ); + WriteCmd( 0xC4 ); // power control 5 + WriteByteData( 0x8A ); + WriteByteData( 0xEE ); + + WriteCmd( 0xC5 ); // voltage control 1 + WriteByteData( 0x0E ); + + WriteCmd( 0x36 ); //MX, MY, RGB mode + WriteByteData( 0xC8 ); + + // ST7735R Gamma Sequence + WriteCmd( 0xE0 ); // gamma positive + WriteByteData( 0x0F ); + WriteByteData( 0x1A ); + WriteByteData( 0x0F ); + WriteByteData( 0x18 ); + WriteByteData( 0x2F ); + WriteByteData( 0x28 ); + WriteByteData( 0x20 ); + WriteByteData( 0x22 ); + WriteByteData( 0x1F ); + WriteByteData( 0x1B ); + WriteByteData( 0x23 ); + WriteByteData( 0x37 ); + WriteByteData( 0x00 ); + WriteByteData( 0x07 ); + WriteByteData( 0x02 ); + WriteByteData( 0x10 ); + WriteCmd( 0xE1 ); // gamma negative + WriteByteData( 0x0F ); + WriteByteData( 0x1B ); + WriteByteData( 0x0F ); + WriteByteData( 0x17 ); + WriteByteData( 0x33 ); + WriteByteData( 0x2C ); + WriteByteData( 0x29 ); + WriteByteData( 0x2E ); + WriteByteData( 0x30 ); + WriteByteData( 0x30 ); + WriteByteData( 0x39 ); + WriteByteData( 0x3F ); + WriteByteData( 0x00 ); + WriteByteData( 0x07 ); + WriteByteData( 0x03 ); + WriteByteData( 0x10 ); + + WriteCmd( 0x2A ); // set column address + WriteByteData( 0x00 ); + WriteByteData( 0x00 ); + WriteByteData( 0x00 ); + WriteByteData( 0x7F ); + WriteCmd( 0x2B ); // set row address + WriteByteData( 0x00 ); + WriteByteData( 0x00 ); + WriteByteData( 0x00 ); + WriteByteData( 0x9F ); + + WriteCmd( 0xF0 ); // enable extensions command + WriteByteData( 0x01 ); + WriteCmd( 0xF6 ); // disable ram power save mode + WriteByteData( 0x00 ); + + WriteCmd( 0x3A ); // interface pixel format (color mode) + WriteByteData( 0x05 ); // 65k mode + WriteCmd( 0x29 ); // display on + + Deactivate(); +} + +void ST7735_LCD::Sleep( void ) +{ + Activate(); + WriteCmd( 0x28 ); + wait_ms( 10 ); + WriteCmd( 0x10 ); + wait_ms( 125 ); + if ( _lcd_pin_bl != 0 ) + *_lcd_pin_bl = LOW; + Deactivate(); +} + +void ST7735_LCD::WakeUp( void ) +{ + Activate(); + WriteCmd( 0x29 ); + wait_ms( 10 ); + WriteCmd( 0x11 ); + wait_ms( 125 ); + if ( _lcd_pin_bl != 0 ) + *_lcd_pin_bl = HIGH; + Deactivate(); +} + +void ST7735_LCD::WriteCmd( unsigned short cmd ) +{ + _lcd_pin_rs = LOW; + serializeByte( cmd & 0xFF ); +} + +void ST7735_LCD::WriteData( unsigned short data ) +{ + _lcd_pin_rs = HIGH; + serializeByte( ( data >> 8 ) & 0xFF ); + serializeByte( data & 0xFF ); +} + +void ST7735_LCD::WriteByteData( unsigned char data ) +{ + _lcd_pin_rs = HIGH; + serializeByte( data ); +} + +void ST7735_LCD::SetXY( uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2 ) +{ + if ( _orientation == LANDSCAPE ) + { + swap( uint16_t, x1, y1 ) + swap( uint16_t, x2, y2 ) + y1 = _disp_height - y1; + y2 = _disp_height - y2; + swap( uint16_t, y1, y2 ) + } + + WriteCmdData( 0x2a, x1 ); + WriteData( x2 ); + WriteCmdData( 0x2b, y1 ); + WriteData( y2 ); + WriteCmd( 0x2c ); +} + +void ST7735_LCD::serializeByte( unsigned char data ) +{ + for ( int i = 0; i < 8; i++ ) + { + if ( data & 0x80 ) _lcd_pin_sda = HIGH; + else _lcd_pin_sda = LOW; + pulseLow( _lcd_pin_scl ); + data = data << 1; + } +}