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/SSD1306.cpp
- Committer:
- dreschpe
- Date:
- 2017-02-06
- Revision:
- 33:f87f06292637
- Parent:
- 17:1dafb896c6f5
- Child:
- 36:668396f861d2
File content as of revision 33:f87f06292637:
/* mbed UniGraphic library - Device specific class * Copyright (c) 2015 Peter Drescher * Released under the MIT License: http://mbed.org/license/mit */ #include "Protocols.h" #include "SSD1306.h" ////////////////////////////////////////////////////////////////////////////////// // display settings /////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////// #define IC_X_SEGS 128 // UC1608 SEG has range 0-239 (239-0 if MX=1), check your datasheet, important for the orientation #define IC_Y_COMS 64 // UC1608 COM has range 0-127 (127-0 if MY=1), check your datasheet, important for the orientation #define SSD1306_SETCONTRAST 0x81 #define SSD1306_DISPLAYALLON_RESUME 0xA4 #define SSD1306_DISPLAYALLON 0xA5 #define SSD1306_NORMALDISPLAY 0xA6 #define SSD1306_INVERTDISPLAY 0xA7 #define SSD1306_DISPLAYOFF 0xAE #define SSD1306_DISPLAYON 0xAF #define SSD1306_SETDISPLAYOFFSET 0xD3 #define SSD1306_SETCOMPINS 0xDA #define SSD1306_SETVCOMDETECT 0xDB #define SSD1306_SETDISPLAYCLOCKDIV 0xD5 #define SSD1306_SETPRECHARGE 0xD9 #define SSD1306_SETMULTIPLEX 0xA8 #define SSD1306_SETLOWCOLUMN 0x00 #define SSD1306_SETHIGHCOLUMN 0x10 #define SSD1306_SETSTARTLINE 0x40 #define SSD1306_MEMORYMODE 0x20 #define SSD1306_COMSCANINC 0xC0 #define SSD1306_COMSCANDEC 0xC8 #define SSD1306_SEGREMAP 0xA0 #define SSD1306_CHARGEPUMP 0x8D SSD1306::SSD1306(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); } SSD1306::SSD1306(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); } SSD1306::SSD1306(proto_t displayproto, int Hz, int address, PinName sda, PinName scl, const char* name , unsigned int LCDSIZE_X, unsigned int LCDSIZE_Y) : LCD(displayproto, Hz, address, sda, scl, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name) { init(); cls(); set_orientation(1); locate(0,0); } // reset and init the lcd controller void SSD1306::init() { /* Start Initial Sequence ----------------------------------------------------*/ // wr_cmd8(0xE2); // sw reset wait_ms(15); wr_cmd8(SSD1306_DISPLAYOFF); // no problem in SPI_16 for single byte cmds wr_cmd16((SSD1306_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((SSD1306_SETMULTIPLEX<<8)|63); // wr_cmd8(63); wr_cmd16((SSD1306_SETDISPLAYOFFSET<<8)|0x00); // wr_cmd8(0x0); wr_cmd8(SSD1306_SETSTARTLINE | 0x0); // line #0 wr_cmd16((SSD1306_CHARGEPUMP<<8)|0x14); // wr_cmd8(0x14); // 0x10 wr_cmd16((SSD1306_MEMORYMODE<<8)|0x00); // wr_cmd8(0x00); // 0x0 act like ks0108 wr_cmd8(SSD1306_SEGREMAP ); //| 0x1); wr_cmd8(SSD1306_COMSCANDEC); wr_cmd16((SSD1306_SETCOMPINS<<8)|0x12); // wr_cmd8(0x12); // LCDSIZE_Y == 32 ? 0x02 : 0x12); wr_cmd16((SSD1306_SETCONTRAST<<8)|0xCF); // wr_cmd8(0xCF); // _rawHeight == 32 ? 0x8F : ((vccstate == SSD1306_EXTERNALVCC) ? 0x9F : 0xCF) ); wr_cmd16((SSD1306_SETPRECHARGE<<8)|0xF1); // wr_cmd8(0xF1); // : 0x22); wr_cmd16((SSD1306_SETVCOMDETECT<<8)|0x40); // wr_cmd8(0x40); wr_cmd8(SSD1306_DISPLAYALLON_RESUME); //wr_cmd8(SSD1306_NORMALDISPLAY); wr_cmd8(SSD1306_INVERTDISPLAY); wr_cmd8(SSD1306_DISPLAYON); } //////////////////////////////////////////////////////////////////// // functions that overrides the standard ones implemented in LCD.cpp //////////////////////////////////////////////////////////////////// void SSD1306::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 SSD1306::set_contrast(int o) { contrast = o; wr_cmd16(0x8100|(o&0xFF)); } //////////////////////////////////////////////////////////////////// // functions that overrides the standard ones implemented in LCD.cpp //////////////////////////////////////////////////////////////////// const uint8_t scroll_speed[8]={3,2,1,6,0,5,4,7}; //////////////////////////////////////////////////////////////////// // functions addon to LCD.cpp //////////////////////////////////////////////////////////////////// void SSD1306::horizontal_scroll(int l_r,int s_page,int e_page,int speed){ wr_cmd8(0x2E); // deactivate scroll before change if(l_r == 1){ wr_cmd16(0x2700); // horizontal scroll left } else { wr_cmd16(0x2600); } wr_cmd16((s_page & 0x07)<<8 | (scroll_speed[speed & 0x07])); wr_cmd16((e_page & 0x07)<<8 ); wr_cmd16(0xFF2F); } void SSD1306::horiz_vert_scroll(int l_r,int s_page,int e_page,int v_off,int speed){ wr_cmd8(0x2E); // deactivate scroll before change if(l_r == 1){ wr_cmd16(0x2A00); // horizontal scroll left } else { wr_cmd16(0x2900); } wr_cmd16((s_page & 0x07)<<8 | (scroll_speed[speed & 0x07])); wr_cmd16((e_page & 0x07)<<8 | (v_off & 0x3F) ); wr_cmd8(0x2F); } void SSD1306::end_scroll(){ wr_cmd8(0x2E); }