Basically i glued Peter Drescher and Simon Ford libs in a GraphicsDisplay class, then derived TFT or LCD class (which inherits Protocols class), then the most derived ones (Inits), which are per-display and are the only part needed to be adapted to diff hw.
Dependents: testUniGraphic_150217 maze_TFT_MMA8451Q TFT_test_frdm-kl25z TFT_test_NUCLEO-F411RE ... more
Display/TFT932x.cpp
- Committer:
- dreschpe
- Date:
- 2015-10-26
- Revision:
- 27:acb2594b8aa4
- Parent:
- 25:daacdcf34e52
- Child:
- 30:87855d03d91a
File content as of revision 27:acb2594b8aa4:
/* mbed UniGraphic library - custom TFT driver class, ILI932x specific * Copyright (c) 2015 Giuliano Dianda * Released under the MIT License: http://mbed.org/license/mit */ #include "platform.h" #include "TFT932x.h" #if DEVICE_PORTINOUT #include "PAR8.h" #include "PAR16.h" #endif //#include "mbed_debug.h" #define SWAP(a, b) { a ^= b; b ^= a; a ^= b; } #if DEVICE_PORTINOUT TFT932x::TFT932x(proto_t displayproto, PortName port, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD, const int lcdsize_x, const int lcdsize_y, const char *name) : GraphicsDisplay(name), screensize_X(lcdsize_x), screensize_Y(lcdsize_y) { if(displayproto==PAR_8) { proto = new PAR8(port, CS, reset, DC, WR, RD); dummycycles=1; } else if(displayproto==PAR_16) { proto = new PAR16(port, CS, reset, DC, WR, RD); dummycycles=0; } // set_orientation(0); foreground(White); background(Black); set_auto_up(false); //we don't have framebuffer usefastwindow=false; fastwindowready=false; is18bit=false; isBGR=false; // cls(); // locate(0,0); } #endif TFT932x::TFT932x(proto_t displayproto, PinName* buspins, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD, const int lcdsize_x, const int lcdsize_y, const char *name) : GraphicsDisplay(name), screensize_X(lcdsize_x), screensize_Y(lcdsize_y) { if(displayproto==BUS_8) { PinName pins[16]; for(int i=0; i<16; i++) pins[i]=NC; for(int i=0; i<8; i++) pins[i]=buspins[i]; proto = new BUS8(pins, CS, reset, DC, WR, RD); dummycycles=1; } else if(displayproto==BUS_16) { proto = new BUS16(buspins, CS, reset, DC, WR, RD); dummycycles=0; } // set_orientation(0); foreground(White); background(Black); set_auto_up(false); //we don't have framebuffer usefastwindow=false; fastwindowready=false; is18bit=false; isBGR=false; // cls(); // locate(0,0); } TFT932x::TFT932x(proto_t displayproto, int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, const int lcdsize_x, const int lcdsize_y, const char *name) : GraphicsDisplay(name), screensize_X(lcdsize_x), screensize_Y(lcdsize_y) { if(displayproto==SPI_8) { proto = new SPI8(Hz, mosi, miso, sclk, CS, reset); dummycycles=4; } else if(displayproto==SPI_16) { proto = new SPI16(Hz, mosi, miso, sclk, CS, reset); dummycycles=2; } // set_orientation(0); foreground(White); background(Black); set_auto_up(false); usefastwindow=false; fastwindowready=false; is18bit=false; isBGR=false; // locate(0,0); } // dummy read needed before read gram // read gram protocol function does 1 dymmy read as for MIPI standard, but ILI932x needs more and protocol specific number of cycles // for example in spi mode, 5 dummy byte read needed, so for SPI16 2x16bit clocks done here and the 5th dummy will be handled by read gram function void TFT932x::dummyread() { for(unsigned int i=0; i<dummycycles; i++) proto->dummyread(); } void TFT932x::reg_select(unsigned char reg, bool forread) { proto->reg_select(reg, forread); } void TFT932x::reg_write(unsigned char reg, unsigned short data) { proto->reg_write(reg, data); } unsigned short TFT932x::reg_read(unsigned char reg) { return proto->reg_read(reg); } void TFT932x::wr_gram(unsigned short data) { proto->wr_gram(data); } void TFT932x::wr_gram(unsigned short data, unsigned int count) { proto->wr_gram(data, count); } void TFT932x::wr_grambuf(unsigned short* data, unsigned int lenght) { proto->wr_grambuf(data, lenght); } unsigned short TFT932x::rd_gram() { return proto->rd_gram(is18bit); // protocol will handle 18to16 bit conversion } //for TFT, just send data, position counters are in hw void TFT932x::window_pushpixel(unsigned short color) { proto->wr_gram(color); } void TFT932x::window_pushpixel(unsigned short color, unsigned int count) { proto->wr_gram(color, count); } void TFT932x::window_pushpixelbuf(unsigned short* color, unsigned int lenght) { proto->wr_grambuf(color, lenght); } void TFT932x::hw_reset() { proto->hw_reset(); BusEnable(true); } void TFT932x::BusEnable(bool enable) { proto->BusEnable(enable); } // ILI932x can't rotate in hw (swap raw<->columns) for landscape views, // but can change the way address counter is auto incremented/decremented void TFT932x::set_orientation(int o) { // if(orientation == o) return; orientation = o; switch (orientation) // BGR bit set for all modes, seems most TFT are like that, in case override set_orientation() in init // ORG bit set for all modes { case 0:// default, portrait view 0° reg_write(0x0001,0x0100); // S720 to S1 reg_write(0x0060,0xA700); // G320 to G1 reg_write(0x03, 0x10B0); set_width(screensize_X); set_height(screensize_Y); break; case 1:// landscape view +90° reg_write(0x0001,0x0000); // S1 to S720 reg_write(0x0060,0xA700); // G320 to G1 reg_write(0x03, 0x10B8); // AM=1 increase addr ctr first vertically then horizontally set_width(screensize_Y); set_height(screensize_X); break; case 2:// portrait view +180° reg_write(0x0001,0x0000); // S1 to S720 reg_write(0x0060,0x2700); // G1 to G320 reg_write(0x03, 0x10B0); set_width(screensize_X); set_height(screensize_Y); break; case 3:// landscape view -90° reg_write(0x0001,0x0100); // S720 to S1 reg_write(0x0060,0x2700); // G1 to G320 reg_write(0x03, 0x10B8); // AM=1 increase addr ctr first vertically then horizontally set_width(screensize_Y); set_height(screensize_X); break; } } void TFT932x::invert(unsigned char o) { unsigned short oldreg = reg_read(0x61); if(o == 0) reg_write(0x61, oldreg|1); // seems most TFT have REV bit enabled for normal display else reg_write(0x61, oldreg&0xFFFE); } void TFT932x::FastWindow(bool enable) { usefastwindow=enable; } // TFT have both column and raw autoincrement inside a window, with internal counters void TFT932x::window(int x, int y, int w, int h) { if(orientation==1 || orientation==3) { SWAP(x,y); SWAP(w,h); } fastwindowready=false; // end raw/column going to be set to lower value than bottom-right corner reg_write(0x50, x);//start column reg_write(0x51, x+w-1);//end column reg_write(0x52, y);//start page reg_write(0x53, y+h-1);//end page reg_write(0x20, 0); // since ORG bit is set, address is windows relative, so should be set always to 0000 reg_write(0x21, 0); reg_select(0x22, false); //write mem, just write gram next } void TFT932x::window4read(int x, int y, int w, int h) { if(orientation==1 || orientation==3) { SWAP(x,y); SWAP(w,h); } fastwindowready=false; // end raw/column going to be set to lower value than bottom-right corner reg_write(0x50, x);//start column reg_write(0x51, x+w-1);//end column reg_write(0x52, y);//start page reg_write(0x53, y+h-1);//end page reg_write(0x20, 0); // since ORG bit is set, address is windows relative, so should be set always to 0000 reg_write(0x21, 0); reg_select(0x22, true); //read mem, just read gram next dummyread(); } void TFT932x::pixel(int x, int y, unsigned short color) { if(usefastwindow) { if(fastwindowready) //setting only start column/page does speedup, but needs end raw/column previously set to bottom-right corner { if(orientation==1 || orientation==3) SWAP(x,y); reg_write(0x50, x);//start column only reg_write(0x52, y);//start page only reg_write(0x20, 0); // since ORG bit is set, address is window relative, so should be set always to 0000 reg_write(0x21, 0); reg_select(0x22, false); //write mem, just write gram next } else { window(x,y,width()-x,height()-y); // set also end raw/column to bottom-right corner fastwindowready=true; } } else window(x,y,1,1); wr_gram(color); } unsigned short TFT932x::pixelread(int x, int y) { /* if(usefastwindow) // for ILI9325 fastwindows for reading works only in PAR16 { if(fastwindowready) //setting only start column/page does speedup, but needs end raw/column previously set to bottom-right corner { if(orientation==1 || orientation==3) SWAP(x,y); reg_write(0x50, x);//start column only reg_write(0x52, y);//start page only reg_write(0x20, 0); // since ORG bit is set, address is window relative, so should be set always to 0000 reg_write(0x21, 0); reg_select(0x22, true); //read mem, just read gram next } else { window4read(x,y,width()-x,height()-y); // set also end raw/column to bottom-right corner fastwindowready=true; } } else*/ window4read(x,y,1,1); unsigned short color; color = rd_gram(); if(isBGR) color = BGR2RGB(color); // in case, convert BGR to RGB return color; } void TFT932x::setscrollarea (int startY, int areasize) // ie 0,480 for whole screen { // ILI932x allows only ful lscreen scrolling unsigned short oldreg = reg_read(0x61); reg_write(0x61, oldreg|2); // enable scroll } void TFT932x::scroll (int lines) // ie 1= scrollup 1, 479= scrolldown 1 { reg_write(0x6A, lines%screensize_Y); // select the (absolute)line which will be displayed as first line } void TFT932x::scrollreset() { unsigned short oldreg = reg_read(0x61); // reg_write(0x61, oldreg&0xFFFD); // disable scroll reg_write(0x6A, 0); } void TFT932x::cls (void) { WindowMax(); wr_gram(_background,screensize_X*screensize_Y); } // try to get read gram pixel format, could be 16bit or 18bit, RGB or BGR void TFT932x::auto_gram_read_format() { unsigned short px=0xCDB1; unsigned short rback, rback18; pixel(0,0,px); window4read(0,0,1,1); rback=proto->rd_gram(0); // try 16bit window4read(0,0,1,1); rback18=proto->rd_gram(1); // try 18bit converted to 16 if((rback18==px) || (BGR2RGB(rback18)==px)) { is18bit=true; if(BGR2RGB(rback18)==px) isBGR=true; } else if((rback==px) || (BGR2RGB(rback)==px)) { if(BGR2RGB(rback)==px) isBGR=true; } // debug("\r\nIdentify gram read color format,\r\nsent %.4X read16 %.4X(bgr%.4X) read18 %.4X(bgr%.4X)", px, rback, BGR2RGB(rback), rback18, BGR2RGB(rback18)); } // try to identify display controller void TFT932x::identify() { tftID = reg_read(0x00); hw_reset(); // in case wrong cmd messed up important settings } int TFT932x::sizeX() { return screensize_X; } int TFT932x::sizeY() { return screensize_Y; }