Adafruit 1.8" TFT Shield HardwareSPI/SoftwareSPI

TFT.cpp

#include "TFT.h"

#if (USB_VID == 0x2341) && (USB_PID == 0x803C) // are we building for Esplora?
TFT EsploraTFT(7, 0, 1);
#endif

TFT::TFT(uint8_t CS, uint8_t RS, uint8_t RST) 
  : Adafruit_ST7735(CS, RS, RST)
{
  // as we already know the orientation (landscape, therefore rotated),
  // set default width and height without need to call begin() first.
  _width = ST7735_TFTHEIGHT;
  _height = ST7735_TFTWIDTH;
}

TFT::TFT(uint8_t CS, uint8_t RS, uint8_t SID, uint8_t SCLK, uint8_t RST) 
  : Adafruit_ST7735(CS, RS, SID, SCLK, RST)
{
  // as we already know the orientation (landscape, therefore rotated),
  // set default width and height without need to call begin() first.
  _width = ST7735_TFTHEIGHT;
  _height = ST7735_TFTWIDTH;
}


void TFT::begin() {
  initR(INITR_REDTAB);
  setRotation(1);
}

TFT.h

#ifndef _ARDUINO_TFT_H
#define _ARDUINO_TFT_H

#include "Arduino.h"
#include "utility/Adafruit_GFX.h"
#include "utility/Adafruit_ST7735.h"

/// The Arduino LCD is a ST7735-based device.
/// By default, it is mounted horizontally.
/// TFT class follows the convention of other
/// Arduino library classes by adding a begin() method
/// to be called in the setup() routine.
/// @author Enrico Gueli <enrico.gueli@gmail.com>
class TFT : public Adafruit_ST7735 {
public:
  TFT(uint8_t CS, uint8_t RS, uint8_t RST);
  TFT(uint8_t CS, uint8_t RS, uint8_t SID, uint8_t SCLK, uint8_t RST);

  void begin();  
};

/// Esplora boards have hard-wired connections with
/// the Arduino LCD if mounted on the onboard connector.
#if (USB_VID == 0x2341) && (USB_PID == 0x803C) // are we building for Esplora?
extern TFT EsploraTFT;
#endif

#endif // _ARDUINO_TFT_H

TFT_randomline.ino

/*
  TFT demo
  https://github.com/arduino/TFT
  http://arduino.cc/en/Reference/TFTLibrary
*/

// randomdot

#include <TFT.h>
#include <SPI.h>

#define TFT_CS  10
#define TFT_DC   8
#define TFT_RST  0
#define TFT_SCLK  13
#define TFT_MOSI  11
#define SD_CS  4

TFT screen = TFT(TFT_CS, TFT_DC, TFT_RST);  // for UNO
// TFT screen = TFT(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);  // for Leonardo

void setup(void) {
  Serial.begin(9600);
  while(!Serial);
  Serial.println("START");

  screen.begin();
  screen.background(0,0,0);
  screen.fill(255,255,255);
    
}

const int XMAX=ST7735_TFTHEIGHT;
const int YMAX=ST7735_TFTWIDTH;

void loop() {
  int x1,y1,x2,y2,r,g,b;
  unsigned long stime,etime;
  
  stime=millis();
  for(int i=1;i<=1000;i++) {
    r=random(256);
    g=random(256);
    b=random(256);
    x1=random(0,XMAX);
    y1=random(0,YMAX);
    x2=random(0,XMAX);
    y2=random(0,YMAX);
    screen.stroke(r,g,b);
    screen.line(x1,y1,x2,y2);
  }
  etime=millis();
  Serial.println(etime-stime);
}