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/
Diff: Inits/SH1106.cpp
- Revision:
- 36:668396f861d2
- Child:
- 37:5de028b08308
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Inits/SH1106.cpp Sun Apr 22 21:41:24 2018 +0000 @@ -0,0 +1,225 @@ +/* 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 +}