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, PinName* buspins, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD, const char *name, unsigned int LCDSIZE_X, unsigned  int LCDSIZE_Y)
00032     : LCD(displayproto, buspins, CS, reset, DC, WR, RD, 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 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)
00042     : LCD(displayproto, Hz, mosi, miso, sclk, CS, reset, DC, LCDSIZE_X, LCDSIZE_Y, IC_X_SEGS, IC_Y_COMS, name)
00043 {
00044     hw_reset();
00045     BusEnable(true);
00046     init();
00047     cls();
00048     set_orientation(1);
00049     locate(0,0);
00050 }
00051 // reset and init the lcd controller
00052 // init sequence is manufacturer specific
00053 void ST7565::init()
00054 {
00055     /* Start Initial Sequence ----------------------------------------------------*/
00056     
00057     wr_cmd8(0xE2);   //  sw reset
00058     wait_ms(10);
00059     
00060     wr_cmd8(0xAE);   //  display off
00061     
00062     wr_cmd8(0xA2);   //  bias voltage (1/9)
00063   //  wr_cmd8(0xA3);   //  bias voltage (1/7)
00064 
00065     //wr_cmd8(0xA0);   // ADC select seg0-seg131
00066     wr_cmd8(0xA1);   // ADC select seg223-seg0
00067     //wr_cmd8(0xC8);   // SHL select com63-com0
00068     wr_cmd8(0xC0);   // SHL select com0-com63
00069 
00070     wr_cmd8(0x2C);   //   Boost ON
00071     wait_ms(10);
00072     wr_cmd8(0x2E);   //   Voltage Regulator ON
00073     wait_ms(10);
00074     wr_cmd8(0x2F);   //   Voltage Follower ON
00075     wait_ms(10);
00076     wr_cmd8(0x20|0x05);   //  Regulor_Resistor_Select resistor ratio 20-27, look at your display specific init code
00077     set_contrast(0x20);
00078     //wr_cmd8(0x81);   //  set contrast (reference voltage register set)
00079     //wr_cmd8(0x15);   //  contrast 00-3F
00080     
00081     wr_cmd8(0xA4);   //  LCD display ram (EntireDisplayOn disable)
00082     wr_cmd8(0x40);   // start line = 0
00083     wr_cmd8(0xA6);     // display normal (1 = illuminated)
00084     wr_cmd8(0xAF);     // display ON 
00085 
00086 }