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This commit is contained in:
Jérôme Delacotte
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// Display Library example for SPI e-paper panels from Dalian Good Display and boards from Waveshare.
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// Requires HW SPI and Adafruit_GFX. Caution: these e-papers require 3.3V supply AND data lines!
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//
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// Display Library based on Demo Example from Good Display: http://www.e-paper-display.com/download_list/downloadcategoryid=34&isMode=false.html
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//
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// Author: Jean-Marc Zingg
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//
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// Version: see library.properties
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//
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// Library: https://github.com/ZinggJM/GxEPD2
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// see GxEPD2_wiring_examples.h for wiring suggestions and examples
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// uncomment next line to use HSPI for EPD (and VSPI for SD), e.g. with Waveshare ESP32 Driver Board
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//#define USE_HSPI_FOR_EPD
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// uncomment next line to use class GFX of library GFX_Root instead of Adafruit_GFX
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#include <GFX.h>
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// Note: if you use this with ENABLE_GxEPD2_GFX 1:
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// uncomment it in GxEPD2_GFX.h too, or add #include <GFX.h> before any #include <GxEPD2_GFX.h>
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#include <GxEPD2_BW.h>
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#include <GxEPD2_3C.h>
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// select the display constructor line in one of the following files (old style):
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#include "GxEPD2_display_selection.h"
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#include "GxEPD2_display_selection_added.h"
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//#include "GxEPD2_display_selection_more.h" // private
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// or select the display class and display driver class in the following file (new style):
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#include "GxEPD2_display_selection_new_style.h"
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#include "Open_Sans_ExtraBold_120.h"
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//const uint32_t partial_update_period_s = 2;
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const uint32_t partial_update_period_s = 60;
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const uint32_t full_update_period_s = 1 * 60 * 60;
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const uint32_t speed_up_factor = 20; // for simulation
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const uint32_t millis_per_second = 1000 / speed_up_factor;
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uint32_t start_time;
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uint32_t next_time;
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uint32_t previous_time;
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uint32_t previous_full_update;
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uint32_t total_seconds = 0;
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uint32_t seconds, minutes, hours, days;
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#if defined(ESP32) && defined(USE_HSPI_FOR_EPD)
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SPIClass hspi(HSPI);
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#endif
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void setup()
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{
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Serial.begin(115200);
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Serial.println();
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Serial.println("setup");
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delay(100);
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#if defined(ESP32) && defined(USE_HSPI_FOR_EPD)
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hspi.begin(13, 12, 14, 15); // remap hspi for EPD (swap pins)
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display.epd2.selectSPI(hspi, SPISettings(4000000, MSBFIRST, SPI_MODE0));
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#endif
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display.init(115200);
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// cleanup
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for (int i = 0; i < 1; i++)
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{
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full_black();
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delay(500);
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full_white();
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delay(500);
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}
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// stripes test
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for (int i = 0; i < 1; i++)
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{
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horizontal_stripes(8);
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delay(1000);
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vertical_stripes(8);
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delay(3000);
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}
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full_white();
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delay(1000);
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// clock simulation test, for limited length
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start_time = next_time = previous_time = previous_full_update = millis();
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for (int i = 0; i < 50; i++)
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{
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clock_test();
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}
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delay(3000);
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full_white();
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delay(1000);
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display.powerOff();
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delay(1000);
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start_time = next_time = previous_time = previous_full_update = millis();
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Serial.println("setup done");
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}
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void loop()
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{
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// uncomment for continuous clock simulation test
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//clock_test();
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}
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void full_white()
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{
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display.setFullWindow();
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display.firstPage();
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do
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{
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display.fillScreen(GxEPD_WHITE);
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}
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while (display.nextPage());
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}
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void full_black()
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{
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display.setFullWindow();
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display.firstPage();
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do
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{
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display.fillScreen(GxEPD_BLACK);
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}
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while (display.nextPage());
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}
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void partial_white()
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{
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display.setPartialWindow(0, 0, display.width(), display.height());
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display.firstPage();
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do
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{
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display.fillScreen(GxEPD_WHITE);
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}
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while (display.nextPage());
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}
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void partial_black()
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{
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display.setPartialWindow(0, 0, display.width(), display.height());
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display.firstPage();
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do
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{
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display.fillScreen(GxEPD_BLACK);
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}
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while (display.nextPage());
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}
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void horizontal_stripes(uint16_t nr)
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{
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uint16_t h = display.height() / nr;
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display.setPartialWindow(0, 0, display.width(), display.height());
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display.firstPage();
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do
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{
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uint16_t y = 0;
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do
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{
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display.fillRect(0, y, display.width(), h, GxEPD_BLACK);
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y += h;
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if (y >= display.height()) break;
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display.fillRect(0, y, display.width(), h, GxEPD_WHITE);
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y += h;
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} while (y < display.height());
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}
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while (display.nextPage());
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}
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void vertical_stripes(uint16_t nr)
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{
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uint16_t w = display.width() / nr;
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display.setPartialWindow(0, 0, display.width(), display.height());
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display.firstPage();
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do
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{
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uint16_t x = 0;
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do
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{
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display.fillRect(x, 0, w, display.height(), GxEPD_BLACK);
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x += w;
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if (x >= display.width()) break;
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display.fillRect(x, 0, w, display.height(), GxEPD_WHITE);
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x += w;
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} while (x < display.width());
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}
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while (display.nextPage());
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}
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void clock_test()
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{
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uint32_t actual = millis();
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while (actual < next_time)
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{
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// the "BlinkWithoutDelay" method works also for overflowed millis
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if ((actual - previous_time) > (partial_update_period_s * 1000))
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{
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//Serial.print(actual - previous_time); Serial.print(" > "); Serial.println(partial_update_period_s * 1000);
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break;
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}
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delay(100);
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actual = millis();
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}
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if ((actual - previous_full_update) > full_update_period_s * millis_per_second)
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{
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//display.clearScreen();
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previous_full_update = actual;
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}
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previous_time = actual;
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next_time += uint32_t(partial_update_period_s * millis_per_second);
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total_seconds += partial_update_period_s;
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seconds = total_seconds % 60;
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minutes = (total_seconds / 60) % 60;
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hours = (total_seconds / 3600) % 24;
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days = (total_seconds / 3600) / 24;
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if ((display.width() >= 400) && (display.height() >= 300))
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{
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showDays();
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showTime();
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}
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else showMinutes();
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display.powerOff();
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}
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String str02(uint32_t v)
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{
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return (v < 10 ? String(0) + String(v) : String(v));
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}
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void showMinutes()
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{
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static int16_t bbx = 400;
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static int16_t bby = 300;
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static uint16_t bbw = 0;
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static uint16_t bbh = 0;
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//Serial.println("showMinutes");
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String str = str02(minutes);
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display.setRotation(display.epd2.WIDTH > display.epd2.HEIGHT ? 0 : 1);
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display.setFont(&Open_Sans_ExtraBold_120);
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display.setTextColor(GxEPD_BLACK);
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int16_t tbx, tby; uint16_t tbw, tbh;
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display.getTextBounds(str, 0, 0, &tbx, &tby, &tbw, &tbh);
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// place the bounding box, cover any previous ones
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int16_t tx = max(0, ((display.width() - tbw) / 2));
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int16_t ty = max(0, ((display.height() - tbh) / 2));
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bbx = min(bbx, tx);
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bby = min(bby, ty);
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bbw = max(bbw, tbw);
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bbh = max(bbh, tbh);
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// calculate the cursor
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int16_t x = bbx - tbx;
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int16_t y = bby - tby;
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display.setPartialWindow(bbx, bby, bbw, bbh);
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display.firstPage();
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do
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{
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display.fillScreen(GxEPD_WHITE);
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//display.drawRect(bbx, bby, bbw, bbh, GxEPD_BLACK);
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display.setCursor(x, y);
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display.print(str);
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}
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while (display.nextPage());
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delay(1000);
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//Serial.println("showMinutes done");
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}
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void showDays()
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{
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static int16_t bbx = 400;
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static int16_t bby = 300;
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static uint16_t bbw = 0;
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static uint16_t bbh = 0;
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//Serial.println("showDays");
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String str(days); str += " days";
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display.setRotation(0);
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display.setFont(&Open_Sans_ExtraBold_120);
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display.setTextColor(GxEPD_BLACK);
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int16_t tbx, tby; uint16_t tbw, tbh;
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display.getTextBounds(str, 0, 0, &tbx, &tby, &tbw, &tbh);
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// place the bounding box
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int16_t tx = max(0, ((display.width() - tbw) / 2));
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int16_t ty = max(0, (display.height() / 4 - tbh / 2));
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bbx = min(bbx, tx);
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bby = min(bby, ty);
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bbw = max(bbw, tbw);
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bbh = max(bbh, tbh);
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// calculate the cursor
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uint16_t x = bbx - tbx;
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uint16_t y = bby - tby;
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display.setPartialWindow(bbx, bby, bbw, bbh);
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display.firstPage();
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do
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{
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display.fillScreen(GxEPD_WHITE);
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//display.drawRect(bbx, bby, bbw, bbh, GxEPD_BLACK);
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display.setCursor(x, y);
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display.print(str);
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}
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while (display.nextPage());
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delay(1000);
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//Serial.println("showDays done");
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}
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void showTime()
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{
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static int16_t bbx = 400;
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static int16_t bby = 300;
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static uint16_t bbw = 0;
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static uint16_t bbh = 0;
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//Serial.println("showTime");
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//String str = str02(minutes) + ":" + str02(seconds);
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String str = str02(hours) + ":" + str02(minutes);
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display.setRotation(0);
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display.setFont(&Open_Sans_ExtraBold_120);
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display.setTextColor(GxEPD_BLACK);
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int16_t tbx, tby; uint16_t tbw, tbh;
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display.getTextBounds(str, 0, 0, &tbx, &tby, &tbw, &tbh);
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// place the bounding box
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int16_t tx = max(0, ((display.width() - tbw) / 2));
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int16_t ty = max(0, (display.height() * 3 / 4 - tbh / 2));
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bbx = min(bbx, tx);
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bby = min(bby, ty);
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bbw = max(bbw, tbw);
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bbh = max(bbh, tbh);
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// calculate the cursor
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uint16_t x = bbx - tbx;
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uint16_t y = bby - tby;
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display.setPartialWindow(bbx, bby, bbw, bbh);
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display.firstPage();
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do
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{
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display.fillScreen(GxEPD_WHITE);
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//display.drawRect(bbx, bby, bbw, bbh, GxEPD_BLACK);
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display.setCursor(x, y);
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display.print(str);
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}
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while (display.nextPage());
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//Serial.println("showTime done");
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}
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