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/IST3020.cpp
- Committer:
- Geremia
- Date:
- 2015-02-12
- Revision:
- 0:75ec1b3cde17
- Child:
- 1:ff019d22b275
File content as of revision 0:75ec1b3cde17:
#include "Protocols.h" #include "IST3020.h" ////////////////////////////////////////////////////////////////////////////////// // display settings /////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////// #define IC_X_SEGS 256 // IST3020 SEG has range 0-255 (255-0 if ADC=1), check your datasheet, important for the orientation #define IC_Y_COMS 64 // IST3020 COM has range 0-63 (63-0 if SHL=1), check your datasheet, important for the orientation #define LCDSIZE_X 192 // display X pixels, IST3020 is advertised as 224x65 but display size could be smaller #define LCDSIZE_Y 64 // display Y pixels, the 65th is for accessing "icons" IST3020::IST3020(proto_t displayproto, PortName port, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD, const char *name) : LCD(displayproto, port, CS, reset, DC, WR, RD, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name) { hw_reset(); BusEnable(true); init(); } IST3020::IST3020(proto_t displayproto, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC, const char *name) : LCD(displayproto, mosi, miso, sclk, CS, reset, DC, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name) { hw_reset(); init(); } // reset and init the lcd controller void IST3020::init() { /* Start Initial Sequence ----------------------------------------------------*/ wr_cmd(0xE2); // sw reset wait_ms(10); wr_cmd(0xAE); // display off wr_cmd(0xAB); // built-in OSC on wr_cmd(0xA2); // bias voltage (1/9) // wr_cmd(0xA3); // bias voltage (1/7) wr_cmd(0xA0); // ADC select seg0-seg223 //wr_cmd(0xA1); // ADC select seg223-seg0 wr_cmd(0xC8); // SHL select com63-com0 //wr_cmd(0xC0); // SHL select com0-com63 wr_cmd(0x2C); // Internal Voltage Converter ON wait_ms(10); wr_cmd(0x2E); // Internal Voltage Regulator ON wait_ms(10); wr_cmd(0x2F); // Internal Voltage Follower ON wait_ms(10); wr_cmd(0x20); // Regulor_Resistor_Select resistor ratio 20-27 20=4.5(default) 27=8.0, 0.5 steps set_contrast(48); //wr_cmd(0x81); // set contrast (reference voltage register set) //wr_cmd(0x20); // contrast 00-3F default 20 wr_cmd(0xA4); // LCD display ram (EntireDisplayOn disable) //wr_cmd(0x70); // External Capacitors Discharge function enable (should be enabled by default) //wr_cmd(0x77); // External Capacitors Discharge function disable wr_cmd(0x40); // start line = 0 wr_cmd(0xA6); // display normal (1 = illuminated) wr_cmd(0xAF); // display ON }