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/ST7565.cpp
- Revision:
- 18:ffa58f1a680a
- Child:
- 21:ae0a4eedfc90
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Inits/ST7565.cpp Mon Mar 02 10:35:41 2015 +0000 @@ -0,0 +1,76 @@ + /* mbed UniGraphic library - Device specific class + * Copyright (c) 2015 Giuliano Dianda + * Released under the MIT License: http://mbed.org/license/mit + */ +#include "Protocols.h" +#include "ST7565.h" + +/*this is a quite standard config for ST7565 and similars, like UC1701*/ + +////////////////////////////////////////////////////////////////////////////////// +// display settings /////////////////////////////////////////////////////// +///////////////////////////////////////////////////////////////////////// +#define IC_X_SEGS 132 // ST7565 SEG has range 0-131 (131-0 if ADC=1), check your datasheet, important for the orientation +#define IC_Y_COMS 64 // ST7565 COM has range 0-63 (63-0 if SHL=1), check your datasheet, important for the orientation +// put in constructor +//#define LCDSIZE_X 128 // display X pixels, ST7565 is advertised as 132x65 but display size could be smaller +//#define LCDSIZE_Y 64 // display Y pixels, the 65th is for accessing "icons" + + + +ST7565::ST7565(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); +} +ST7565::ST7565(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); +} +// reset and init the lcd controller +// init sequence is manufacturer specific +void ST7565::init() +{ + /* Start Initial Sequence ----------------------------------------------------*/ + + wr_cmd8(0xE2); // sw reset + wait_ms(10); + + wr_cmd8(0xAE); // display off + + wr_cmd8(0xA2); // bias voltage (1/9) + // wr_cmd8(0xA3); // bias voltage (1/7) + + //wr_cmd8(0xA0); // ADC select seg0-seg131 + wr_cmd8(0xA1); // ADC select seg223-seg0 + //wr_cmd8(0xC8); // SHL select com63-com0 + wr_cmd8(0xC0); // SHL select com0-com63 + + wr_cmd8(0x2C); // Boost ON + wait_ms(10); + wr_cmd8(0x2E); // Voltage Regulator ON + wait_ms(10); + wr_cmd8(0x2F); // Voltage Follower ON + wait_ms(10); + wr_cmd8(0x20|0x05); // Regulor_Resistor_Select resistor ratio 20-27, look at your display specific init code + set_contrast(0x20); + //wr_cmd8(0x81); // set contrast (reference voltage register set) + //wr_cmd8(0x15); // contrast 00-3F + + wr_cmd8(0xA4); // LCD display ram (EntireDisplayOn disable) + wr_cmd8(0x40); // start line = 0 + wr_cmd8(0xA6); // display normal (1 = illuminated) + wr_cmd8(0xAF); // display ON + +} \ No newline at end of file