136 lines
3.8 KiB
C++
136 lines
3.8 KiB
C++
/*
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An example digital clock using a TFT LCD screen to show the time.
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Demonstrates use of the font printing routines. (Time updates but date does not.)
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For a more accurate clock, it would be better to use the RTClib library.
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But this is just a demo.
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This examples uses the hardware SPI only. Non-hardware SPI
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is just too slow (~8 times slower!)
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Based on clock sketch by Gilchrist 6/2/2014 1.0
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Updated by Bodmer
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A few colour codes:
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code color
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0x0000 Black
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0xFFFF White
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0xBDF7 Light Gray
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0x7BEF Dark Gray
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0xF800 Red
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0xFFE0 Yellow
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0xFBE0 Orange
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0x79E0 Brown
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0x7E0 Green
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0x7FF Cyan
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0x1F Blue
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0xF81F Pink
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*/
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#include <TFT_eSPI.h> // Graphics and font library for ST7735 driver chip
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#include <SPI.h>
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TFT_eSPI tft = TFT_eSPI(); // Invoke library, pins defined in User_Setup.h
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uint32_t targetTime = 0; // for next 1 second timeout
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byte omm = 99;
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boolean initial = 1;
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byte xcolon = 0;
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unsigned int colour = 0;
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static uint8_t conv2d(const char* p) {
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uint8_t v = 0;
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if ('0' <= *p && *p <= '9')
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v = *p - '0';
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return 10 * v + *++p - '0';
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}
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uint8_t hh=conv2d(__TIME__), mm=conv2d(__TIME__+3), ss=conv2d(__TIME__+6); // Get H, M, S from compile time
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void setup(void) {
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tft.init();
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tft.setRotation(1);
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tft.fillScreen(TFT_BLACK);
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tft.setTextColor(TFT_YELLOW, TFT_BLACK); // Note: the new fonts do not draw the background colour
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targetTime = millis() + 1000;
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}
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void loop() {
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if (targetTime < millis()) {
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targetTime = millis()+1000;
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ss++; // Advance second
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if (ss==60) {
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ss=0;
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omm = mm;
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mm++; // Advance minute
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if(mm>59) {
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mm=0;
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hh++; // Advance hour
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if (hh>23) {
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hh=0;
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}
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}
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}
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if (ss==0 || initial) {
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initial = 0;
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tft.setTextColor(TFT_GREEN, TFT_BLACK);
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tft.setCursor (8, 52);
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tft.print(__DATE__); // This uses the standard ADAFruit small font
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tft.setTextColor(TFT_BLUE, TFT_BLACK);
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tft.drawCentreString("It is windy",120,48,2); // Next size up font 2
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//tft.setTextColor(0xF81F, TFT_BLACK); // Pink
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//tft.drawCentreString("12.34",80,100,6); // Large font 6 only contains characters [space] 0 1 2 3 4 5 6 7 8 9 . : a p m
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}
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// Update digital time
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byte xpos = 6;
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byte ypos = 0;
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if (omm != mm) { // Only redraw every minute to minimise flicker
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// Uncomment ONE of the next 2 lines, using the ghost image demonstrates text overlay as time is drawn over it
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tft.setTextColor(0x39C4, TFT_BLACK); // Leave a 7 segment ghost image, comment out next line!
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//tft.setTextColor(TFT_BLACK, TFT_BLACK); // Set font colour to black to wipe image
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// Font 7 is to show a pseudo 7 segment display.
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// Font 7 only contains characters [space] 0 1 2 3 4 5 6 7 8 9 0 : .
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tft.drawString("88:88",xpos,ypos,7); // Overwrite the text to clear it
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tft.setTextColor(0xFBE0); // Orange
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omm = mm;
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if (hh<10) xpos+= tft.drawChar('0',xpos,ypos,7);
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xpos+= tft.drawNumber(hh,xpos,ypos,7);
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xcolon=xpos;
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xpos+= tft.drawChar(':',xpos,ypos,7);
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if (mm<10) xpos+= tft.drawChar('0',xpos,ypos,7);
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tft.drawNumber(mm,xpos,ypos,7);
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}
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if (ss%2) { // Flash the colon
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tft.setTextColor(0x39C4, TFT_BLACK);
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xpos+= tft.drawChar(':',xcolon,ypos,7);
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tft.setTextColor(0xFBE0, TFT_BLACK);
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}
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else {
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tft.drawChar(':',xcolon,ypos,7);
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colour = random(0xFFFF);
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// Erase the old text with a rectangle, the disadvantage of this method is increased display flicker
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tft.fillRect (0, 64, 160, 20, TFT_BLACK);
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tft.setTextColor(colour);
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tft.drawRightString("Colour",75,64,4); // Right justified string drawing to x position 75
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String scolour = String(colour,HEX);
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scolour.toUpperCase();
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char buffer[20];
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scolour.toCharArray(buffer,20);
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tft.drawString(buffer,82,64,4);
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}
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}
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}
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