Add MODE_PACKING_8PPB example for Discussions

examples/MODE_PACKING_8PPB/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.16.0)
+set(EXTRA_COMPONENT_DIRS "../../")
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(dragon_example)

examples/MODE_PACKING_8PPB/README.md

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+A demo showing a Full-Screen Image
+==================================
+
+*The image size is chosen to fit a 1200 * 825 display!*
+
+Image by David REVOY / CC BY (https://creativecommons.org/licenses/by/3.0)
+https://commons.wikimedia.org/wiki/File:Durian_-_Sintel-wallpaper-dragon.jpg

examples/MODE_PACKING_8PPB/main/CMakeLists.txt

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+set(app_sources "main.c")
+
+idf_component_register(SRCS ${app_sources} REQUIRES epdiy)

examples/MODE_PACKING_8PPB/main/main.c

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+/* Simple firmware for a ESP32 displaying a static image on an EPaper Screen */
+
+#include "esp_heap_caps.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#include <string.h> // memset
+#include "dragon.h"
+#include "epd_highlevel.h"
+#include "epdiy.h"
+
+EpdiyHighlevelState hl;
+// The epdiy framebuffer that is sent to the render engine
+uint8_t * framebuffer;
+
+// MODE_PACKING_8PPB does nothing (Want to intent using 8BPP)
+// MODE_DU only monochrome no grays (But still 4BPP)
+// MODE_GC16 grays "slow mode" (4BPP)
+int draw_mode = MODE_PACKING_8PPB;
+
+// choose the default demo board depending on the architecture
+#ifdef CONFIG_IDF_TARGET_ESP32
+#define DEMO_BOARD epd_board_v6
+#elif defined(CONFIG_IDF_TARGET_ESP32S3)
+#define DEMO_BOARD epd_board_v7
+#endif
+
+void idf_loop() {
+    EpdRect dragon_area = 
+    {.x = 0, .y = 0, 
+    .width = dragon_width, 
+    .height = dragon_height};
+
+    int temperature = 25;
+
+    epd_poweron();
+    epd_fullclear(&hl, temperature);
+    framebuffer = epd_hl_get_framebuffer(&hl);
+
+    //epd_copy_to_framebuffer(dragon_area, dragon_data, epd_hl_get_framebuffer(&hl));
+    epd_copy_to_framebuffer(dragon_area, dragon_data, framebuffer);
+    // NOW Let's draw over and on top of Dragon image a full 10x black lines
+    for (int y = 0; y < 10; y++) {
+        switch (draw_mode)
+        {
+        case 1:
+            /* MODE_DU 4PPB */
+            memset(&framebuffer[y*epd_width()/2], 0x00, epd_width()/2);
+            break;
+
+        default:
+            /* MODE_DU 8PPB */
+            memset(&framebuffer[y*epd_width()/8], 0x00, epd_width()/8);
+            break;
+        }
+    }
+    /**
+     * @brief EXPECTED: Setting full 3 lines to 0x00 it should draw it on display.
+     *        RESULT  : Draws nothing in MODE_PACKING_8PPB
+     *        RESULT  : Draws OK 10 black lines in MODE_DU & MODE_GC16
+     */
+
+    enum EpdDrawError _err = epd_hl_update_screen(&hl, draw_mode, temperature);
+    epd_poweroff();
+
+    vTaskDelay(50000);
+}
+
+void idf_setup() {
+    epd_init(&DEMO_BOARD, &ED060XC3, EPD_LUT_1K);
+    epd_set_vcom(1560);
+    hl = epd_hl_init(EPD_BUILTIN_WAVEFORM);
+}
+
+#ifndef ARDUINO_ARCH_ESP32
+void app_main() {
+    idf_setup();
+
+    while (1) {
+        idf_loop();
+    };
+}
+#endif

examples/MODE_PACKING_8PPB/main/main.ino

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+/**
+ * This is the Arduino wrapper for the "Demo" example.
+ * Please go to the main.c for the main example file.
+ *
+ * This example was developed for the ESP IoT Development Framework (IDF).
+ * You can still use this code in the Arduino IDE, but it may not look
+ * and feel like a classic Arduino sketch.
+ * If you are looking for an example with Arduino look-and-feel,
+ * please check the other examples.
+ */
+
+// Important: These are C functions, so they must be declared with C linkage!
+extern "C" {
+void idf_setup();
+void idf_loop();
+}
+
+void setup() {
+    if (psramInit()) {
+        Serial.println("\nThe PSRAM is correctly initialized");
+    } else {
+        Serial.println("\nPSRAM does not work");
+    }
+
+    idf_setup();
+}
+
+void loop() {
+    idf_loop();
+}