TFTLCD with FastIO
Fork of TFTLCD by
st7735.cpp
- Committer:
- ttodorov
- Date:
- 2013-01-26
- Revision:
- 22:4c169297f374
- Parent:
- 20:4bdca8d8dadc
File content as of revision 22:4c169297f374:
/* * 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, backlight_t blType, float defaultBackLightLevel ) : LCD( 128, 160, CS, RS, RESET, BL, blType, defaultBackLightLevel ), _lcd_pin_scl( SCL ), _lcd_pin_sda( SDA ) { } void ST7735_LCD::Initialize( orientation_t orientation, colordepth_t colors ) { _orientation = orientation; _colorDepth = colors; 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; else if ( _bl_pwm != 0 ) *_bl_pwm = _bl_pwm_default; 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 ); WriteByteData( 0x00 ); // 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 ); // 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): 0x05 => RGB16, 0x06 => RGB18 WriteByteData( _colorDepth == RGB16 ? 0x05 : 0x06 ); WriteCmd( 0x36 ); //MX, MY, RGB mode switch ( _orientation ) { case LANDSCAPE: WriteByteData( 0x6C ); break; case PORTRAIT_REV: WriteByteData( 0xDC ); break; case LANDSCAPE_REV: WriteByteData( 0xB8 ); break; case PORTRAIT: default: WriteByteData( 0x08 ); break; } WriteCmd( 0x29 ); // display on Deactivate(); } void ST7735_LCD::Sleep( void ) { Activate(); WriteCmd( 0x28 ); wait_ms( 10 ); WriteCmd( 0x10 ); wait_ms( 125 ); LCD::Sleep(); Deactivate(); } void ST7735_LCD::WakeUp( void ) { Activate(); WriteCmd( 0x29 ); wait_ms( 10 ); WriteCmd( 0x11 ); wait_ms( 125 ); LCD::WakeUp(); 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( unsigned short x1, unsigned short y1, unsigned short x2, unsigned short y2 ) { WriteCmdData( 0x2a, x1 ); WriteData( x2 ); WriteCmdData( 0x2b, y1 ); WriteData( y2 ); WriteCmd( 0x2c ); } void ST7735_LCD::SetPixelColor( unsigned int color, colordepth_t mode ) { unsigned char r = 0, g = 0, b = 0; unsigned short clr; if ( _colorDepth == RGB16 ) { switch ( mode ) { case RGB16: WriteData( color & 0xFFFF ); break; case RGB18: r = ( color >> 10 ) & 0xF8; g = ( color >> 4 ) & 0xFC; b = ( color >> 1 ) & 0x1F; clr = ( ( r | ( g >> 5 ) ) << 8 ) | ( ( g << 3 ) | b ); WriteData( clr ); break; case RGB24: r = ( color >> 16 ) & 0xF8; g = ( color >> 8 ) & 0xFC; b = color & 0xF8; clr = ( ( r | ( g >> 5 ) ) << 8 ) | ( ( g << 3 ) | ( b >> 3 ) ); WriteData( clr ); break; } } else if ( _colorDepth == RGB18 ) { switch ( mode ) { case RGB16: r = ( ( color >> 8 ) & 0xF8 ) | ( ( color & 0x8000 ) >> 13 ); g = ( color >> 3 ) & 0xFC; b = ( ( color << 3 ) & 0xFC ) | ( ( color >> 3 ) & 0x01 ); break; case RGB18: b = ( color << 2 ) & 0xFC; g = ( color >> 4 ) & 0xFC; r = ( color >> 10 ) & 0xFC; break; case RGB24: r = ( color >> 16 ) & 0xFC; g = ( color >> 8 ) & 0xFC; b = color & 0xFC; break; } WriteByteData( r ); WriteByteData( g ); WriteByteData( b ); } } 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; } }