E-paper display using partial updates

1#define ENABLE_GxEPD2_GFX 0
2
3#include <GxEPD2_BW.h> // including   both doesn't use more code or ram
4#include <GxEPD2_3C.h> // including both doesn't   use more code or ram
5#include <U8g2_for_Adafruit_GFX.h>
6
7//if you have   another microcontroller or another e-ink display module you have to change the following   line
8GxEPD2_BW<GxEPD2_290_T94_V2, GxEPD2_290_T94_V2::HEIGHT> display(GxEPD2_290_T94_V2(/*CS=5*/   SS, /*DC=*/ 17, /*RST=*/ 16, /*BUSY=*/ 4)); // GDEM029T94, Waveshare 2.9" V2 variant
9
10U8G2_FOR_ADAFRUIT_GFX   u8g2Fonts;
11
12void setup()
13{
14  display.init();
15  display.setTextColor(GxEPD_BLACK);
16   display.firstPage();
17  display.setRotation(1);
18
19  u8g2Fonts.begin(display);   // connect u8g2 procedures to Adafruit GFX
20  delay(1000);
21
22  uint16_t bg   = GxEPD_WHITE;
23  uint16_t fg = GxEPD_BLACK;
24  u8g2Fonts.setForegroundColor(fg);          // apply Adafruit GFX color
25  u8g2Fonts.setBackgroundColor(bg);
26
27   do{
28    display.fillScreen(GxEPD_WHITE);
29
30    u8g2Fonts.setFont(u8g2_font_fub20_tr);    //font is set
31    u8g2Fonts.setCursor(20, 80);             //cursor(x,y)
32     u8g2Fonts.print("Millis: ");   //print the text
33  }while (display.nextPage());
34}
35
36
37void   loop() {
38  display.setPartialWindow(115, 50, 200, 40);
39  display.firstPage();
40
41   do{
42    display.fillScreen(GxEPD_WHITE);
43    u8g2Fonts.setCursor(120, 80);
44     u8g2Fonts.print(millis());
45  }while(display.nextPage());
46}

1#define ENABLE_GxEPD2_GFX 0
2
3#include <GxEPD2_BW.h> // including  both doesn't use more code or ram
4#include <GxEPD2_3C.h> // including both doesn't  use more code or ram
5#include <U8g2_for_Adafruit_GFX.h>
6
7//if you have  another microcontroller or another e-ink display module you have to change the following  line
8GxEPD2_BW<GxEPD2_290_T94_V2, GxEPD2_290_T94_V2::HEIGHT> display(GxEPD2_290_T94_V2(/*CS=5*/  SS, /*DC=*/ 17, /*RST=*/ 16, /*BUSY=*/ 4)); // GDEM029T94, Waveshare 2.9" V2 variant
9
10U8G2_FOR_ADAFRUIT_GFX  u8g2Fonts;
11
12void setup()
13{
14  display.init();
15  display.setTextColor(GxEPD_BLACK);
16  display.firstPage();
17  display.setRotation(1);
18
19  u8g2Fonts.begin(display);  // connect u8g2 procedures to Adafruit GFX
20  delay(1000);
21
22  uint16_t bg  = GxEPD_WHITE;
23  uint16_t fg = GxEPD_BLACK;
24  u8g2Fonts.setForegroundColor(fg);         // apply Adafruit GFX color
25  u8g2Fonts.setBackgroundColor(bg);
26
27  do{
28    display.fillScreen(GxEPD_WHITE);
29
30    u8g2Fonts.setFont(u8g2_font_fub20_tr);   //font is set
31    u8g2Fonts.setCursor(20, 80);             //cursor(x,y)
32    u8g2Fonts.print("Millis: ");   //print the text
33  }while (display.nextPage());
34}
35
36
37void  loop() {
38  display.setPartialWindow(115, 50, 200, 40);
39  display.firstPage();
40
41  do{
42    display.fillScreen(GxEPD_WHITE);
43    u8g2Fonts.setCursor(120, 80);
44    u8g2Fonts.print(millis());
45  }while(display.nextPage());
46}