Mithat Konar (the wiki)

/*
 * display_st7735_1.44_adafruit_st7735.ino
 *  
 * Test screen update speed with large default fonts on 
 * a 128x128 TFT screen that uses the ST7735 chip.
 * 
 * Consumes 26% of program storage space and
 * 6% of dynamic memory on a Pro Mini.
 * 
 * Mithat Konar
 */
 
#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>
 
/*
 * Pin assignments:
 * RST: 8
 * CE/CS/SCE: 10
 * DC/"D/C"/A0: 9
 * DIN/DN/MOSI/DATA: 11 (Arduino HW standard)
 * CLK/SCLK/SCK: 13  (Arduino HW standard)
 * VCC: 3.3V
 * LIGHT/LED: ground through 1 ohm resistor (yields about 20mA)
 * GND: ground
 */
 
const unsigned int CLOCK_PIN = 13,
                   DATA_PIN = 11,
                   TFT_CS = 10,
                   TFT_DC = 9,
                   TFT_RST = 8;
 
const unsigned int TOP_MARGIN = 32;    // number of pixels you need to shift for 128x128 screen
 
// Use hardware SPI.
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS,  TFT_DC, TFT_RST); // Use hardware SPI
unsigned int counter = 80;
 
void setup(void) {
  tft.initR(INITR_BLACKTAB);   // 1.8"initialize a ST7735S chip, black tab
 
  tft.fillScreen(ST7735_BLACK);  // clear the screen
  tft.setTextWrap(false);
 
  tft.setCursor(0, TOP_MARGIN);
  tft.setTextSize(1);
  tft.setTextColor(ST7735_WHITE);
  tft.setTextWrap(true);
  tft.print("Adafruit ST7735");
}
 
void loop() {
  tft.setTextSize(7);
 
  // draw over what you wrote last time
  tft.setCursor(0, TOP_MARGIN + 40);
  tft.setTextColor(ST7735_BLACK);
  tft.print(counter);    
 
  // update and draw something new
  counter++;
  tft.setCursor(0, TOP_MARGIN + 40);
  tft.setTextColor(ST7735_WHITE);
  tft.print(counter);
 
  // inherent frame rate of this loop is about 15 fps w/o added delay (8 MHz processor).
  delay(500);
}