ILI9341实现模拟时钟

参考  http://embedded-lab.com/blog/tutorial-8-esp8266-internet-clock/ 这个代码，在 ILI9431 上实现模拟时钟的显示。

/***************************************************
  This is our GFX example for the Adafruit ILI9341 Breakout and Shield
  ----> http://www.adafruit.com/products/1651

  Check out the links above for our tutorials and wiring diagrams
  These displays use SPI to communicate, 4 or 5 pins are required to
  interface (RST is optional)
  Adafruit invests time and resources providing this open source code,
  please support Adafruit and open-source hardware by purchasing
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.
  MIT license, all text above must be included in any redistribution
 ****************************************************/


#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

// For the Adafruit shield, these are the default.
//#define ILI9341_DC 9
//#define ILI9341_CS 10

// For the Adafruit shield, these are the default.
#define ILI9341_DC D9
#define ILI9341_CS D8
#define ILI9341_MOSI MOSI
#define ILI9341_CLK SCK
#define ILI9341_RST D2
#define ILI9341_MISO MISO

// Use hardware SPI (on Uno, #13, #12, #11) and the above for CS/DC
Adafruit_ILI9341 tft = Adafruit_ILI9341(ILI9341_CS, ILI9341_DC, ILI9341_RST);

float sx = 0, sy = 1, mx = 1, my = 0, hx = -1, hy = 0;    // Saved H, M, S x & y multipliers
float sdeg=0, mdeg=0, hdeg=0;
uint16_t osx=120, osy=120, omx=120, omy=120, ohx=120, ohy=120;  // Saved H, M, S x & y coords
uint16_t x0=0, x1=0, yy0=0, yy1=0;
uint8_t hh, mm, ss;
void setup() {
  Serial.begin(9600);
  Serial.println("ILI9341 Test!"); 
 
  tft.begin(2000000UL);


  tft.fillScreen(ILI9341_NAVY);
  
  tft.setTextColor(ILI9341_WHITE, ILI9341_DARKCYAN);  // Adding a background colour erases previous text automatically
  
  // Draw clock face
  tft.fillCircle(120, 120, 118, ILI9341_GREEN);
  tft.fillCircle(120, 120, 110, ILI9341_BLACK);

  // Draw 12 lines
  for(int i = 0; i<360; i+= 30) {
    sx = cos((i-90)*0.0174532925);
    sy = sin((i-90)*0.0174532925);
    x0 = sx*114+120;
    yy0 = sy*114+120;
    x1 = sx*100+120;
    yy1 = sy*100+120;

    tft.drawLine(x0, yy0, x1, yy1, ILI9341_GREEN);
  }

  // Draw 60 dots
  for(int i = 0; i<360; i+= 6) {
    sx = cos((i-90)*0.0174532925);
    sy = sin((i-90)*0.0174532925);
    x0 = sx*102+120;
    yy0 = sy*102+120;
    // Draw minute markers
    tft.drawPixel(x0, yy0, ILI9341_WHITE);
    
    // Draw main quadrant dots
    if(i==0 || i==180) tft.fillCircle(x0, yy0, 2, ILI9341_WHITE);
    if(i==90 || i==270) tft.fillCircle(x0, yy0, 2, ILI9341_WHITE);
  }

  tft.fillCircle(120, 121, 3, ILI9341_WHITE);
}

void loop(void) {
  for (hh=0;hh<12;hh++)
    for (mm=0;mm<60;mm++)
      for (ss=0;ss<60;ss++)
        {

    // Pre-compute hand degrees, x &amp; y coords for a fast screen update
    sdeg = ss*6;                  // 0-59 -> 0-354
    mdeg = mm*6+sdeg*0.01666667;  // 0-59 -> 0-360 - includes seconds
    hdeg = hh*30+mdeg*0.0833333;  // 0-11 -> 0-360 - includes minutes and seconds
    hx = cos((hdeg-90)*0.0174532925);    
    hy = sin((hdeg-90)*0.0174532925);
    mx = cos((mdeg-90)*0.0174532925);    
    my = sin((mdeg-90)*0.0174532925);
    sx = cos((sdeg-90)*0.0174532925);    
    sy = sin((sdeg-90)*0.0174532925);

    if (ss==0) {
      // Erase hour and minute hand positions every minute
      tft.drawLine(ohx, ohy, 120, 121, ILI9341_BLACK);
      ohx = hx*62+121;    
      ohy = hy*62+121;
      tft.drawLine(omx, omy, 120, 121, ILI9341_BLACK);
      omx = mx*84+120;    
      omy = my*84+121;
    }

      // Redraw new hand positions, hour and minute hands not erased here to avoid flicker
      tft.drawLine(osx, osy, 120, 121, ILI9341_BLACK);
      osx = sx*90+121;    
      osy = sy*90+121;
      tft.drawLine(osx, osy, 120, 121, ILI9341_RED);
      tft.drawLine(ohx, ohy, 120, 121, ILI9341_WHITE);
      tft.drawLine(omx, omy, 120, 121, ILI9341_WHITE);
      tft.drawLine(osx, osy, 120, 121, ILI9341_RED);

      tft.fillCircle(120, 121, 3, ILI9341_RED);
      tft.setCursor(25, 245);
      if(hh <10) tft.print(0);
      tft.print(hh);
      tft.print(':');
      if(mm <10) tft.print(0);
      tft.print(mm);
      tft.print(':');
      if(ss <10) tft.print(0);
      tft.print(ss);
      tft.setCursor(65, 285);
//      tft.print(tzone);
    //tft.drawCentreString("Time flies",120,260,4);
 // delay(1000);
        }
} 

运行结果：

ILI9431 模拟时钟

文件下载：