UniGraphic-Fork for ST7920-LCD-controller and SH1106. Tested with 128x64 LCD with SPI and 128x64-OLED with IIC
Dependents: UniGraphic-St7920-Test AfficheurUTILECO
Fork of UniGraphic by
Fork of the UniGraphic-Library for monochrome LCDs with ST7920 controller and 128x64-IIC-OLED-Display with SH1106-Controller
Had to adapt LCD for following reasons:
- Give access to screenbuffer buffer[] to parent class
- pixel() and pixel_read() as they are hardware-dependent
- added reset-pin to IIC-Interface
GraphicDisplay:: sends buffer to LCD when auto_update is set to true.
Testprogram for ST7920 can be found here:
https://developer.mbed.org/users/charly/code/UniGraphic-St7920-Test/
Inits/SH1106.cpp
- Committer:
- charly
- Date:
- 2018-04-22
- Revision:
- 36:668396f861d2
- Child:
- 37:5de028b08308
File content as of revision 36:668396f861d2:
/* mbed UniGraphic library - Device specific class * SH1106 by Karl Zweimüller * SSD1306 by Copyright (c) 2015 Peter Drescher * Released under the MIT License: http://mbed.org/license/mit */ #include "Protocols.h" #include "SH1106.h" ////////////////////////////////////////////////////////////////////////////////// // display settings /////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////// #define IC_X_SEGS 132 // 132 SEG #define IC_Y_COMS 64 // 64 COM #define SH1106_SETCONTRAST 0x81 #define SH1106_DISPLAYALLON_RESUME 0xA4 #define SH1106_DISPLAYALLON 0xA5 #define SH1106_NORMALDISPLAY 0xA6 #define SH1106_INVERTDISPLAY 0xA7 #define SH1106_DISPLAYOFF 0xAE #define SH1106_DISPLAYON 0xAF #define SH1106_SETDISPLAYOFFSET 0xD3 #define SH1106_SETCOMPINS 0xDA #define SH1106_SETVCOMDETECT 0xDB #define SH1106_SETDISPLAYCLOCKDIV 0xD5 #define SH1106_SETPRECHARGE 0xD9 #define SH1106_SETMULTIPLEX 0xA8 #define SH1106_SETLOWCOLUMN 0x00 #define SH1106_SETHIGHCOLUMN 0x10 #define SH1106_SETSTARTLINE 0x40 #define SH1106_MEMORYMODE 0x20 #define SH1106_COMSCANINC 0xC0 #define SH1106_COMSCANDEC 0xC8 #define SH1106_SEGREMAP 0xA0 #define SH1106_CHARGEPUMP 0x8D SH1106::SH1106(proto_t displayproto, PortName port, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD, const char *name , unsigned int LCDSIZE_X, unsigned int LCDSIZE_Y) : LCD(displayproto, port, CS, reset, DC, WR, RD, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name) { hw_reset(); BusEnable(true); init(); cls(); set_orientation(1); locate(0,0); } SH1106::SH1106(proto_t displayproto, int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC, const char *name, unsigned int LCDSIZE_X, unsigned int LCDSIZE_Y) : LCD(displayproto, Hz, mosi, miso, sclk, CS, reset, DC, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name) { hw_reset(); BusEnable(true); init(); cls(); set_orientation(1); locate(0,0); } SH1106::SH1106(proto_t displayproto, int Hz, int address, PinName sda, PinName scl, PinName reset, const char* name , unsigned int LCDSIZE_X, unsigned int LCDSIZE_Y) : LCD(displayproto, Hz, address, sda, scl,reset, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name) { hw_reset(); init(); cls(); set_orientation(1); locate(0,0); } // reset and init the lcd controller void SH1106::init() { /* Start Initial Sequence ----------------------------------------------------*/ /* SH1106 // wr_cmd8(0xE2); // sw reset wait_ms(15); wr_cmd8(SH1106_DISPLAYOFF); // no problem in SPI_16 for single byte cmds wr_cmd16((SH1106_SETDISPLAYCLOCKDIV<<8)|0x80); // wr_cmd16 for multibyte cmds issue in SPI16 mode // wr_cmd8(0x80); // in SPI_16 it would become 0xE380 and will break things up wr_cmd16((SH1106_SETMULTIPLEX<<8)|63); // wr_cmd8(63); wr_cmd16((SH1106_SETDISPLAYOFFSET<<8)|0x00); // wr_cmd8(0x0); wr_cmd8(SH1106_SETSTARTLINE | 0x0); // line #0 wr_cmd16((SH1106_CHARGEPUMP<<8)|0x14); // wr_cmd8(0x14); // 0x10 wr_cmd16((SH1106_MEMORYMODE<<8)|0x00); // wr_cmd8(0x00); // 0x0 act like ks0108 wr_cmd8(SH1106_SEGREMAP ); //| 0x1); wr_cmd8(SH1106_COMSCANDEC); wr_cmd16((SH1106_SETCOMPINS<<8)|0x12); // wr_cmd8(0x12); // LCDSIZE_Y == 32 ? 0x02 : 0x12); wr_cmd16((SH1106_SETCONTRAST<<8)|0xCF); // wr_cmd8(0xCF); // _rawHeight == 32 ? 0x8F : ((vccstate == SH1106_EXTERNALVCC) ? 0x9F : 0xCF) ); wr_cmd16((SH1106_SETPRECHARGE<<8)|0xF1); // wr_cmd8(0xF1); // : 0x22); wr_cmd16((SH1106_SETVCOMDETECT<<8)|0x40); // wr_cmd8(0x40); wr_cmd8(SH1106_DISPLAYALLON_RESUME); //wr_cmd8(SH1106_NORMALDISPLAY); wr_cmd8(SH1106_INVERTDISPLAY); wr_cmd8(SH1106_DISPLAYON); */ //SH1106 wr_cmd8(0xAE);//--turn off oled panel wr_cmd8(0x02);//---set low column address wr_cmd8(0x10);//---set high column address wr_cmd8(0x40);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F) wr_cmd8(0x81);//--set contrast control register wr_cmd8(0xA0);//--Set contrast wr_cmd8(0xA8);//--set multiplex ratio(1 to 64) wr_cmd8(0x3F);//--1/64 duty wr_cmd8(0xD3);//-set display offset Shift Mapping RAM Counter (0x00~0x3F) wr_cmd8(0x00);//-not offset wr_cmd8(0xd5);//--set display clock divide ratio/oscillator frequency wr_cmd8(0x80);//--set divide ratio, Set Clock as 100 Frames/Sec wr_cmd8(0xD9);//--set pre-charge period wr_cmd8(0xF1);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock wr_cmd8(0xDA);//--set com pins hardware configuration wr_cmd8(0x12); // or 0x02 wr_cmd8(0xDB);//--set vcomh wr_cmd8(0x40);//Set VCOM Deselect Level //wr_cmd8(0x20);//-Set Page Addressing Mode (0x00/0x01/0x02) // not on SH1106 wr_cmd8(0xA4);// Disable Entire Display On (0xa4/0xa5) wr_cmd8(0xA6);// Disable Inverse Display On (0xa6/a7) wr_cmd8(0xA1); // reverse order //wr_cmd8(0xC0);//Set COM/Row Scan Direction wr_cmd8(0xC8); //reverse direction wr_cmd8(0xAF);//--turn on oled panel } //////////////////////////////////////////////////////////////////// // functions that overrides the standard ones implemented in LCD.cpp //////////////////////////////////////////////////////////////////// void SH1106::copy_to_lcd(void) { for(int page=0; page<8 /*_LCDPAGES */; page++) { wr_cmd8(0x02); // set column low nibble wr_cmd8(0x10); // set column hi nibble wr_cmd8(0xB0+page); // set page wr_grambuf(buffer16+(page*screensize_X>>1), screensize_X>>1); // send whole page pixels as shorts(16bit) not bytes! } } void SH1106::cls(void) { unsigned short tmp = _background^0xFFFF; //memset(buffer,tmp,/*screensize_X*_LCDPAGES*/ 128*64/8); // clear display buffer memset(buffer,0x00,screensize_X*(screensize_Y>>3)); // clear display buffer copy_to_lcd(); } void SH1106::mirrorXY(mirror_t mode) { switch (mode) { case(NONE): wr_cmd16(0xA0C0); break; case(X): wr_cmd16(0xA1C0); break; case(Y): wr_cmd16(0xA0C8); break; case(XY): wr_cmd16(0xA1C8); break; } } void SH1106::set_contrast(int o) { contrast = o; wr_cmd16(0x8100|(o&0xFF)); } void SH1106::pixel(int x, int y, unsigned short color) { // first check parameter if((x >= screensize_X) || (y >= screensize_Y) || (x<0) || (y<0)) return; //Buffer[(Xpoint + (Ypoint / 8) * sOLED_DIS.OLED_Dis_Column)] |= 1 << (Ypoint % 8); //Buffer[(Xpoint + (Ypoint / 8) * sOLED_DIS.OLED_Dis_Column)] |= 0 << (Ypoint % 8); if (color) { buffer[x+((y>>3)*screensize_X)] |= 0 << (y % 8); } else { buffer[x+((y>>3)*screensize_X)] |= 1 << (y % 8); } } unsigned short SH1106::pixelread(int x, int y) { // first check parameter if((x >= screensize_X) || (y >= screensize_Y) || (x<0) || (y<0)) return 0; //Buffer[(Xpoint + (Ypoint / 8) * sOLED_DIS.OLED_Dis_Column)] |= 1 << (Ypoint % 8); //Buffer[(Xpoint + (Ypoint / 8) * sOLED_DIS.OLED_Dis_Column)] |= 0 << (Ypoint % 8); if (buffer[x+((y>>3)*screensize_X)] & 1 << (y % 8) == 0) return 0xFFFF ; // pixel not set, White else return 0; // pixel set, Black }