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    [Solved]using built-in RTC on ArduinoIDE?

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    • A
      akita11
      last edited by m5-docs

      In MicroPython, we can use built-in RTC as clock, such as NTP clock.
      Is there any way (library) to handle built-in RTC as clock on ArduinoIDE?

      1 Reply Last reply Reply Quote 0
      • K
        kat
        last edited by

        Hi,
        I have found this, it's maybe what you want:

        #include <M5Stack.h>
        #define TFT_GREY 0x5AEB

        uint32_t targetTime = 0; // for next 1 second timeout
        static uint8_t conv2d(const char* p); // Forward declaration needed for IDE 1.6.x
        uint8_t hh = conv2d(TIME), mm = conv2d(TIME + 3), ss = conv2d(TIME + 6); // Get H, M, S from compile time

        byte omm = 99, oss = 99;
        byte xcolon = 0, xsecs = 0;
        unsigned int colour = 0;

        void setup(void) {
        //Serial.begin(115200);
        M5.begin();
        // M5.Lcd.setRotation(1);
        M5.Lcd.fillScreen(TFT_BLACK);

        M5.Lcd.setTextSize(1);
        M5.Lcd.setTextColor(TFT_YELLOW, TFT_BLACK);

        targetTime = millis() + 1000;
        }

        void loop() {
        if (targetTime < millis()) {
        // Set next update for 1 second later
        targetTime = millis() + 1000;

        // Adjust the time values by adding 1 second
        ss++;              // Advance second
        if (ss == 60) {    // Check for roll-over
          ss = 0;          // Reset seconds to zero
          omm = mm;        // Save last minute time for display update
          mm++;            // Advance minute
          if (mm > 59) {   // Check for roll-over
            mm = 0;
            hh++;          // Advance hour
            if (hh > 23) { // Check for 24hr roll-over (could roll-over on 13)
              hh = 0;      // 0 for 24 hour clock, set to 1 for 12 hour clock
            }
          }
        }
        
        
        // Update digital time
        int xpos = 0;
        int ypos = 85; // Top left corner ot clock text, about half way down
        int ysecs = ypos + 24;
        
        if (omm != mm) { // Redraw hours and minutes time every minute
          omm = mm;
          // Draw hours and minutes
          if (hh < 10) xpos += M5.Lcd.drawChar('0', xpos, ypos, 8); // Add hours leading zero for 24 hr clock
          xpos += M5.Lcd.drawNumber(hh, xpos, ypos, 8);             // Draw hours
          xcolon = xpos; // Save colon coord for later to flash on/off later
          xpos += M5.Lcd.drawChar(':', xpos, ypos - 8, 8);
          if (mm < 10) xpos += M5.Lcd.drawChar('0', xpos, ypos, 8); // Add minutes leading zero
          xpos += M5.Lcd.drawNumber(mm, xpos, ypos, 8);             // Draw minutes
          xsecs = xpos; // Sae seconds 'x' position for later display updates
        }
        if (oss != ss) { // Redraw seconds time every second
          oss = ss;
          xpos = xsecs;
        
          if (ss % 2) { // Flash the colons on/off
            M5.Lcd.setTextColor(0x39C4, TFT_BLACK);        // Set colour to grey to dim colon
            M5.Lcd.drawChar(':', xcolon, ypos - 8, 8);     // Hour:minute colon
            xpos += M5.Lcd.drawChar(':', xsecs, ysecs, 6); // Seconds colon
            M5.Lcd.setTextColor(TFT_YELLOW, TFT_BLACK);    // Set colour back to yellow
          }
          else {
            M5.Lcd.drawChar(':', xcolon, ypos - 8, 8);     // Hour:minute colon
            xpos += M5.Lcd.drawChar(':', xsecs, ysecs, 6); // Seconds colon
          }
        
          //Draw seconds
          if (ss < 10) xpos += M5.Lcd.drawChar('0', xpos, ysecs, 6); // Add leading zero
          M5.Lcd.drawNumber(ss, xpos, ysecs, 6);                     // Draw seconds
         }
        

        }
        }

        static uint8_t conv2d(const char* p) {
        uint8_t v = 0;
        if ('0' <= *p && *p <= '9')
        v = *p - '0';
        return 10 * v + *++p - '0';
        }

        A 1 Reply Last reply Reply Quote 0
        • A
          akita11 @kat
          last edited by

          @kat Thanks, this seems to be software-counting clock in main loop. I'm looking for background-counting clock...

          1 Reply Last reply Reply Quote 0
          • A
            akita11
            last edited by

            No, my question is NOT solved yet...

            1 Reply Last reply Reply Quote 0
            • K
              kat
              last edited by

              @akita11 said in [Solved]using built-in RTC on ArduinoIDE?:

              No, my question is NOT solved yet...
              ah ok sorry, i don't know this...

              1 Reply Last reply Reply Quote 0
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