finn/crosspoint-reader
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Move to SDK EInkDisplay and enable anti-aliased 2-bit text (#5)

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* First pass at moving to SDK EInkDisplay library

* Add 2-bit grayscale text and anti-aliased rendering of text

* Render status bar for empty chapters

* Refresh screen every 15 pages to avoid ghosting

* Simplify boot and sleep screens

* Give FileSelectionScreen task more stack memory

* Move text around slightly on Boot and Sleep screens

* Re-use existing buffer and write to whole screen for 'partial update'
This commit is contained in:
Dave Allie
2025-12-08 19:48:49 +11:00
committed by GitHub
parent de453fed1d
commit 2ed8017aa2
31 changed files with 11300 additions and 9243 deletions
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16
src/main.cpp
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@@ -1,7 +1,7 @@
#include <Arduino.h>
#include <EInkDisplay.h>
#include <EpdRenderer.h>
#include <Epub.h>
#include <GxEPD2_BW.h>
#include <InputManager.h>
#include <SD.h>
#include <SPI.h>
@@ -28,10 +28,9 @@
#define SD_SPI_CS 12
#define SD_SPI_MISO 7
GxEPD2_BW<GxEPD2_426_GDEQ0426T82, GxEPD2_426_GDEQ0426T82::HEIGHT> display(GxEPD2_426_GDEQ0426T82(EPD_CS, EPD_DC,
EPD_RST, EPD_BUSY));
EInkDisplay einkDisplay(EPD_SCLK, EPD_MOSI, EPD_CS, EPD_DC, EPD_RST, EPD_BUSY);
InputManager inputManager;
EpdRenderer renderer(display);
EpdRenderer renderer(einkDisplay);
Screen* currentScreen;
CrossPointState appState;
@@ -123,7 +122,7 @@ void enterDeepSleep() {
// Enable Wakeup on LOW (button press)
esp_deep_sleep_enable_gpio_wakeup(1ULL << InputManager::POWER_BUTTON_PIN, ESP_GPIO_WAKEUP_GPIO_LOW);
display.hibernate();
einkDisplay.deepSleep();
// Enter Deep Sleep
esp_deep_sleep_start();
@@ -142,7 +141,7 @@ void onSelectEpubFile(const std::string& path) {
enterNewScreen(new EpubReaderScreen(renderer, inputManager, epub, onGoHome));
} else {
exitScreen();
enterNewScreen(new FullScreenMessageScreen(renderer, inputManager, "Failed to load epub", REGULAR, false, false));
enterNewScreen(new FullScreenMessageScreen(renderer, inputManager, "Failed to load epub", REGULAR, EInkDisplay::HALF_REFRESH));
delay(2000);
onGoHome();
}
@@ -170,10 +169,7 @@ void setup() {
SPI.begin(EPD_SCLK, SD_SPI_MISO, EPD_MOSI, EPD_CS);
// Initialize display
const SPISettings spi_settings(SPI_FQ, MSBFIRST, SPI_MODE0);
display.init(115200, true, 2, false, SPI, spi_settings);
display.setRotation(3); // 270 degrees
display.setTextColor(GxEPD_BLACK);
einkDisplay.begin();
Serial.println("Display initialized");
exitScreen();