使按钮在Arduino TFT触摸屏上执行某些操作

Question

所以我有一个Arduino MEGA2560和一个TFT屏蔽触摸屏。 我使用了其中一个示例，仅使用drawRect()就使2个按钮显示在屏幕上。 但是，当我按下这两个盒子时，如何使它们起作用？ 我知道这两个框的坐标，那么如何使它们“感知”触摸并过渡到另一个显示屏幕？ 也许代码示例会很有帮助！ 谢谢。

我当前的代码如下：您可以在其中添加必要的部分。

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_TFTLCD.h> // Hardware-specific library

#define LCD_CS A3 // Chip Select goes to Analog 3
#define LCD_CD A2 // Command/Data goes to Analog 2
#define LCD_WR A1 // LCD Write goes to Analog 1
#define LCD_RD A0 // LCD Read goes to Analog 0

#define LCD_RESET A4 // Can alternately just connect to Arduino's reset pin

#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF

Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);


void setup(void) {
  Serial.begin(9600);
  progmemPrintln(PSTR("TFT LCD"));

#ifdef USE_ADAFRUIT_SHIELD_PINOUT
  progmemPrintln(PSTR("Using Adafruit 2.8\" TFT Arduino Shield Pinout"));
#else
  progmemPrintln(PSTR("Using Adafruit 2.8\" TFT Breakout Board Pinout"));
#endif

  tft.reset();

  uint16_t identifier = tft.readID();

  if(identifier == 0x9325) {
    progmemPrintln(PSTR("Found ILI9325 LCD driver"));
  } else if(identifier == 0x9328) {
    progmemPrintln(PSTR("Found ILI9328 LCD driver"));
  } else if(identifier == 0x7575) {
    progmemPrintln(PSTR("Found HX8347G LCD driver"));
  } else {
    progmemPrint(PSTR("Unknown LCD driver chip: "));
    Serial.println(identifier, HEX);
    progmemPrintln(PSTR("If using the Adafruit 2.8\" TFT Arduino shield, the line:"));
    progmemPrintln(PSTR("  #define USE_ADAFRUIT_SHIELD_PINOUT"));
    progmemPrintln(PSTR("should appear in the library header (Adafruit_TFT.h)."));
    progmemPrintln(PSTR("If using the breakout board, it should NOT be #defined!"));
    progmemPrintln(PSTR("Also if using the breakout, double-check that all wiring"));
    progmemPrintln(PSTR("matches the tutorial."));
    return;
  }

  tft.begin(identifier);



  progmemPrint(PSTR("Text                     "));
  Serial.println(startText());
  delay(0);



  progmemPrintln(PSTR("Done!"));
}

void loop(void) {

    startText();
    delay(9999999);

}



unsigned long startText() {
  tft.fillScreen(BLACK);
  unsigned long start = micros();
  tft.setCursor(0, 0);
  tft.println();
  tft.println();
  tft.setTextColor(GREEN);    tft.setTextSize(2.8);
  tft.println("Welcome ");
  tft.println();
  tft.setTextColor(WHITE);    tft.setTextSize(2.5);

  tft.println();

  tft.drawRect(5, 150, 110, 110, YELLOW);
  tft.drawRect(130, 150, 110, 110, RED);
  tft.setCursor(155, 170);
  tft.setTextColor(RED);
  tft.println("OFF");
  tft.fillRect(5, 150, 110, 110, YELLOW);
  tft.fillRect(13, 158, 94, 94, BLACK);
  tft.setTextColor(GREEN);
  tft.setCursor(20, 170);
  tft.println("ON");

  return micros() - start;

}

// Copy string from flash to serial port
// Source string MUST be inside a PSTR() declaration!
void progmemPrint(const char *str) {
  char c;
  while(c = pgm_read_byte(str++)) Serial.print(c);
}

// Same as above, with trailing newline
void progmemPrintln(const char *str) {
  progmemPrint(str);
  Serial.println();
}

Answer 1

您需要触摸屏库

#include <TouchScreen.h>
//inside loop  
    TSPoint p = ts.getPoint();
    // Retrieve a point  
    p = ts.getPoint();
    Serial.print("X = "); Serial.print(p.x);
    Serial.print("\tY = "); Serial.print(p.y);
    Serial.print("\tPressure = "); Serial.println(p.z);

Answer 2

这是一个UART TFT LCD，它支持WYSIWYG编辑器，可在PC中构建GUI并通过USB下载。

它可以由Arduino通过UART控制，因此只需使用Serial.print（）即可使其显示很多图像。 您甚至可以自己构建Font并下载到LCD。

参见https://www.indiegogo.com/projects/nextion-a-cost-effective-high-performance-tft-hmi/x/4467372