ST7565.cpp

00001  /* mbed UniGraphic library - Device specific class
00002  * Copyright (c) 2015 Giuliano Dianda
00003  * Released under the MIT License: http://mbed.org/license/mit
00004  */
00005 #include "Protocols.h "
00006 #include "ST7565.h"
00007 
00008 /*this is a quite standard config for ST7565 and similars, like UC1701*/
00009 
00010 //////////////////////////////////////////////////////////////////////////////////
00011 // display settings ///////////////////////////////////////////////////////
00012 /////////////////////////////////////////////////////////////////////////
00013 #define IC_X_SEGS    132 // ST7565 SEG has range 0-131 (131-0 if ADC=1), check your datasheet, important for the orientation
00014 #define IC_Y_COMS    64  // ST7565 COM has range 0-63 (63-0 if SHL=1), check your datasheet, important for the orientation
00015 // put in constructor
00016 //#define LCDSIZE_X       128 // display X pixels, ST7565 is advertised as 132x65 but display size could be smaller
00017 //#define LCDSIZE_Y       64  // display Y pixels, the 65th is for accessing "icons"
00018 
00019 
00020 
00021 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)
00022     : LCD(displayproto, port, CS, reset, DC, WR, RD, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name)
00023 {
00024     hw_reset();
00025     BusEnable(true);
00026     init();
00027     cls();
00028     set_orientation(1);
00029     locate(0,0);
00030 }
00031 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)
00032     : LCD(displayproto, Hz, mosi, miso, sclk, CS, reset, DC, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name)
00033 {
00034     hw_reset();
00035     BusEnable(true);
00036     init();
00037     cls();
00038     set_orientation(1);
00039     locate(0,0);
00040 }
00041 // reset and init the lcd controller
00042 // init sequence is manufacturer specific
00043 void ST7565::init()
00044 {
00045     /* Start Initial Sequence ----------------------------------------------------*/
00046     
00047     wr_cmd8(0xE2);   //  sw reset
00048     wait_ms(10);
00049     
00050     wr_cmd8(0xAE);   //  display off
00051     
00052     wr_cmd8(0xA2);   //  bias voltage (1/9)
00053   //  wr_cmd8(0xA3);   //  bias voltage (1/7)
00054 
00055     //wr_cmd8(0xA0);   // ADC select seg0-seg131
00056     wr_cmd8(0xA1);   // ADC select seg223-seg0
00057     //wr_cmd8(0xC8);   // SHL select com63-com0
00058     wr_cmd8(0xC0);   // SHL select com0-com63
00059 
00060     wr_cmd8(0x2C);   //   Boost ON
00061     wait_ms(10);
00062     wr_cmd8(0x2E);   //   Voltage Regulator ON
00063     wait_ms(10);
00064     wr_cmd8(0x2F);   //   Voltage Follower ON
00065     wait_ms(10);
00066     wr_cmd8(0x20|0x05);   //  Regulor_Resistor_Select resistor ratio 20-27, look at your display specific init code
00067     set_contrast(0x20);
00068     //wr_cmd8(0x81);   //  set contrast (reference voltage register set)
00069     //wr_cmd8(0x15);   //  contrast 00-3F
00070     
00071     wr_cmd8(0xA4);   //  LCD display ram (EntireDisplayOn disable)
00072     wr_cmd8(0x40);   // start line = 0
00073     wr_cmd8(0xA6);     // display normal (1 = illuminated)
00074     wr_cmd8(0xAF);     // display ON 
00075 
00076 }