12864min LCD

12864g

12864MIN can display 128 * 64 dot matrix monochrome images, or 16 * 16 dot matrix display Chinese characters 8 * 4-line, or 8 * 16 dot matrix display in English, numbers, symbols 16 * 4 lines. Or 5 * 8 dot matrix display in English, numbers, symbols 21 * 8 lines.

Control IC UC 1701x

Specification of LCD

Rom is the Chinese words internal library, which is not used in this LCD, leave it NC

with back PCB board
without back PCB board

IC Documents

Module use library u8glib, find more information on this page:https://code.google.com/p/u8glib/
File:U8glib.zip

Arduino demo code

 
#include "U8glib.h"

U8GLIB_NHD_C12864 u8g(13, 11, 10, 9, 8);    // SPI Com: SCK = 13, MOSI = 11, CS = 10, CD = 9, RST = 8 
 
void draw(void) {
  // graphic commands to redraw the complete screen should be placed here  
  u8g.setFont(u8g_font_unifont);
  //u8g.setFont(u8g_font_osb21);
  u8g.drawStr( 0, 20, "Electrodragon");
}
 
void setup(void) {
  u8g.setContrast(0); // Config the contrast to the best effect
  u8g.setRot180();// rotate screen, if required
  // set SPI backup if required
  //u8g.setHardwareBackup(u8g_backup_avr_spi);
 
  // assign default color value
  if ( u8g.getMode() == U8G_MODE_R3G3B2 ) {
    u8g.setColorIndex(255);     // white
  }
  else if ( u8g.getMode() == U8G_MODE_GRAY2BIT ) {
    u8g.setColorIndex(3);         // max intensity
  }
  else if ( u8g.getMode() == U8G_MODE_BW ) {
    u8g.setColorIndex(1);         // pixel on
  }
  else if ( u8g.getMode() == U8G_MODE_HICOLOR ) {
    u8g.setHiColorByRGB(255,255,255);
  }
}
 
void loop(void) {
  // picture loop
  u8g.firstPage();  
  do {
    draw();
  } 
  while( u8g.nextPage() );
 
  // rebuild the picture after some delay
  delay(500);
}

Please config the driving pin using this U8GLIB_NHD_C12864 u8g(13, 11, 10, 9, 8); command.. And notice to enable this command when using the u8glib example codes also.
Use "setContrast" to config the contrast as you want. We highly recommend you to setContrast to 0 to get the best display effect.
"setRot90/setRot180/setRot270" functions will be helpful to rotate the display direction as you want.Recommend to use setRot180.

Wiring

as defined in the demo code below:
U8GLIB_NHD_C12864 u8g(13, 11, 10, 9, 8); // SPI Com: SCK = 13, MOSI = 11, CS = 10, CD = 9, RST = 8

Arduino	LCD12864
D13	SCK
D11	SDA
3V3	VDD, LEDA
GND	VSS
D10	CS
D8	RST
D9	RS

12864g LCD arduino shield

Demo Code

remember to add contrast setting to set up the contrast of LCD
use example sketch analog read (but remove the equation and only read value straight) to read each button value and fit for: 4-up, 0-left, 2-down, 1-select, 3-right

 

#include "U8glib.h"

// setup u8g object, please remove comment from one of the following constructor calls
// IMPORTANT NOTE: The complete list of supported devices is here: http://code.google.com/p/u8glib/wiki/device

U8GLIB_NHD_C12864 u8g(13, 11, 10, 9, 8);	// SPI Com: SCK = 13, MOSI = 11, CS = 10, A0 = 9, RST = 8

#define KEY_NONE 0
#define KEY_PREV 1
#define KEY_NEXT 2
#define KEY_SELECT 3
#define KEY_BACK 4


uint8_t uiKeyCodeFirst = KEY_NONE;
uint8_t uiKeyCodeSecond = KEY_NONE;
uint8_t uiKeyCode = KEY_NONE;

int adc_key_in;
int key=-1;
int oldkey=-1;


// Convert ADC value to key number
//         4
//         |
//   0 --  1 -- 3
//         |
//         2
int get_key(unsigned int input)
{   
    if (input < 10) return 4;
    else  if (input < 200) return 0;
    else  if (input < 400) return 2;
    else  if (input < 600) return 1;
    else  if (input < 800) return 3;    
    else  return -1;
}

void uiStep(void) {
  
  adc_key_in = analogRead(0);    // read the value from the sensor  
  key = get_key(adc_key_in);	 // convert into key press	
  if (key != oldkey)	  // if keypress is detected
   {
    delay(50);		// wait for debounce time
    adc_key_in = analogRead(0);    // read the value from the sensor  
    key = get_key(adc_key_in);	   // convert into key press
    if (key != oldkey)				
    {			
      oldkey = key;
      if (key >=0){
             //Serial.println(key);
             if ( key == 0 )
               uiKeyCodeFirst = KEY_BACK;
             else if ( key == 1 )
               uiKeyCodeFirst = KEY_SELECT;
             else if ( key == 2 )
               uiKeyCodeFirst = KEY_NEXT;
             else if ( key == 4 )
               uiKeyCodeFirst = KEY_PREV;
             else 
               uiKeyCodeFirst = KEY_NONE;
  
             uiKeyCode = uiKeyCodeFirst;           
      }
    }
  }
 delay(100);
}


#define MENU_ITEMS 6
char *menu_strings[MENU_ITEMS] = { "LCD12864 Shield", "www.ElectroDragon.com", "Temperature", "Humidity" ,"About","OK"};

uint8_t menu_current = 0;
uint8_t menu_redraw_required = 0;
uint8_t last_key_code = KEY_NONE;


void drawMenu(void) {
  uint8_t i, h;
  u8g_uint_t w, d;

  u8g.setFont(u8g_font_6x12);//4x6 5x7 5x8 6x10 6x12 6x13
  u8g.setFontRefHeightText();
  u8g.setFontPosTop();
  
  h = u8g.getFontAscent()-u8g.getFontDescent();
  w = u8g.getWidth();
  for( i = 0; i < MENU_ITEMS; i++ ) {
    d = (w-u8g.getStrWidth(menu_strings[i]))/2;
    u8g.setDefaultForegroundColor();
    if ( i == menu_current ) {  
      u8g.drawBox(0, i*h+1, w, h);
      u8g.setDefaultBackgroundColor();
    }
    u8g.drawStr(d, i*h+1, menu_strings[i]);
  }
}

void updateMenu(void) 
{
  switch ( uiKeyCode ) {
    case KEY_NEXT:
      menu_current++;
      if ( menu_current >= MENU_ITEMS )menu_current = 0;
      menu_redraw_required = 1;
      break;
    case KEY_PREV:
      if ( menu_current == 0 )menu_current = MENU_ITEMS;
      menu_current--;
      menu_redraw_required = 1;
      break;
  }
  uiKeyCode = KEY_NONE;
}


void setup() {
   u8g.setContrast(0);
  u8g.setRot180();// rotate screen, if required
  menu_redraw_required = 1;     // force initial redraw
  //Serial.begin(9600);
}

void loop() {  

  uiStep();                                // check for key press
  updateMenu();                            // update menu bar    
  
  if (  menu_redraw_required != 0 ) {
    u8g.firstPage();
    do  {
      drawMenu();
    } while( u8g.nextPage() );
    menu_redraw_required = 0;
  }
  
}

Schematic

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