Some of the methods for the u8glib library (Google it to find/download) are:
lcd.begin(); // reset display and put in default state
lcd.enableCursor(); // cursor visible
lcd,disableCursor(); // cursor not visible (default state)
lcd.setCursorPos(x, y); // cursor to x, y
lcd.setColorIndex(col); // BW on = 1, off = 0
lcd.drawBitMap(x, y, cnt, h, *bitmap); // draw bit map of cnt bytes
// width is cnt * 8
// at x, y (top left) height h
lcd.drawBox(x, y, w, h); // filled box at x, y. width w, height h
// fill set by color index
lcd.drawCircle(x, y, rad, opt); // x, y centre, radius rad,
// opt is option to draw part circle
// U8G_DRAW_UPPER_RIGHT, ...LEFT,
// ... LOWER_LEFT, ... RIGHT, ...ALL
lcd.drawDisk(x, y, rad, opt); // as above but filled circle
lcd.drawFrame(x, y, w, h); // frame at x, y width w height h
lcd.drawRFrame(x, y, w, h, r); // rounded frame, edges radius r
lcd.drawHLine(x, y, w); // draw horizontal line from x,y width w
lcd.drawVLine(x, y, h); // draw vertical line from x, y height h
lcd.drawLine(x1, y1, x2, y2,); // draw line from x1, y1 to x2, y2
lcd.drawTriangle(x1, y1, x2, y2, x3, y3); // filled triangle
lcd.drawPixel(x, y); // pixel at x, y
lcd.setFont(*font); // sets font - see table below
lcd.getStrWidth(*s); // returns string width in pixels in current font
lcd.drawStr(x, y, *s); // string at x, lower left of font characters
lcd.firstPage(); // starts a “picture loop”
lcd.nextPage(); // marks end of “picture loop”, returns 0 if finished
x = col, y = row down from the top left 0, 0 of the LCD. Images (like boxes) draw w = right, h = down from the index x, y. f
For an 128 x 64 display using the ST7920 controller chip an object can be created very simply with
#include “u8glib.h” U8GLIB_ST7920_128X64_1X lcd(SCK, MOSI, CS); // lcd object
where SCK, MOSI & CS are the standard Arduino Uno SPI bus signals - see code below for connections. Note that display PSB must be GND for serial SPI bus operation.
Code
// QC12864B display using ST7920, with built in pot "VR" for adjusting VO
// LCD connections VSS - GND, VDD - 5V, RS - 10, RW - 11, E - 13, PSB - GND, A - 120R - 5V, K - GND
// sonar Trig 8, Echo 9
#include "U8glib.h"
#include "NewPing.h"
// SPI SCK, MOSI & SS
#define EN 13
#define RW 11
#define CS 10
// sonar
#define TRIG 8
#define ECHO 9
#define MAXDIST 200
// display set up, bar, line position length, caption position
#define BARWDTH 5
#define BARHT 10
#define LINEX1 2
#define LINEY1 50
#define LINELEN 120
#define CAPY1 10
// lcd object
U8GLIB_ST7920_128X64_1X lcd(EN, RW, CS); // SCK = EN D13, MOSI = RW D11, SS = CS D10
// sonar object
NewPing sonar(TRIG, ECHO, MAXDIST);
void setup(void)
{
lcd.begin(); // init display
lcd.setRot180(); // flip screen
}
void loop(void)
{
unsigned int barht; // bar height = number of echos (0-50)
unsigned int barecho; // echo distance (0 to 120-BARWDTH) = 50
unsigned cm; // echo return
char cmbuf[4]; // echo return in ASCII
cm = sonar.ping_cm(); // get distance echo
sprintf(cmbuf, "%d", cm); // convert to ASCII
barecho = map(cm, 0, MAXDIST, LINEX1, LINEX1 + LINELEN); // scale cm to line len
barht = BARHT; // set bar height
// picture loop
lcd.firstPage();
do
{
lcd.setFont(u8g_font_helvR08); // font height "A" of 8 pixels, 2 rows "g" descenders
lcd.drawStr(LINEX1, CAPY1, "Echo distance measurement"); // col 2 row 8, text bottom left is on row
lcd.drawStr(40, CAPY1 + 11, cmbuf);
lcd.drawStr(60, CAPY1 + 11, "cm");
lcd.drawLine(LINEX1, LINEY1, LINEX1 + LINELEN, LINEY1); // base line
lcd.drawStr(LINEX1, LINEY1 + 10, "0"); // scale numbers
lcd.drawStr(LINEX1 + LINELEN - 16, LINEY1 + 10, "200");
lcd.drawBox(LINEX1 + barecho, LINEY1 - barht, BARWDTH, barht);
} while(lcd.nextPage());
// rebuild the picture after some delay
delay(500);
}
Pin connections

Connection as above (4 pins)
