#256 color implementation 1st draft

examples/color/CMakeLists.txt

@@ -0,0 +1,4 @@
+cmake_minimum_required(VERSION 3.16.0)
+set(EXTRA_COMPONENT_DIRS "../../")
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(color_example)

examples/color/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/color/main/CMakeLists.txt

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

examples/color/main/main.c

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+/* Simple firmware for a ESP32 displaying a Color square in a DES epaper screen with CFA on top */
+#include "esp_heap_caps.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+
+#include "esp_sleep.h"
+#include <epdiy.h>
+#include "epd_highlevel.h"
+
+EpdiyHighlevelState hl;
+int temperature = 25;
+// Buffers
+uint8_t *fb;            // EPD 2bpp buffer
+
+int color_test() {
+  EpdRect epd_area = {
+      .x = 0,
+      .y = 0,
+      .width = epd_width()/2,
+      .height = epd_height()
+  };
+
+  uint8_t color_of = 0;
+  /**
+   * @brief PATTERN
+   * pix1     2    3  X
+   *    B     G    R  row:1
+   *    G     R    B  row:2
+   *    R     B    G  row:3
+   */
+  for (uint16_t y=1; y<epd_area.height; y++) {
+    for (uint16_t x=1; x<epd_area.width; x++) {
+      // x, y, r, g, b
+      if (y < 560) {
+        epd_draw_cpixel(x, y, x/10, color_of, color_of, hl.front_fb);
+      } else if (y >= 560 && y < 1120) {
+        epd_draw_cpixel(x, y, color_of, x/10, color_of, hl.front_fb);
+      } else {
+        epd_draw_cpixel(x, y, color_of, color_of, x/10, hl.front_fb);
+      }
+    }
+    vTaskDelay(1);
+  }
+
+  enum EpdDrawError _err = epd_hl_update_screen(&hl, MODE_GC16, temperature);
+  epd_poweroff();
+  return _err;
+}
+
+// Deepsleep
+#define DEEP_SLEEP_SECONDS 300
+uint64_t USEC = 1000000;
+int getFreePsram(){
+    multi_heap_info_t info;
+    heap_caps_get_info(&info, MALLOC_CAP_SPIRAM);
+    return info.total_free_bytes;
+}
+
+#ifndef ARDUINO_ARCH_ESP32
+void app_main() {
+  printf("before epd_init() Free PSRAM: %d\n", getFreePsram());
+
+  epd_init(&epd_board_v7, &epdiy_GDEW101C01, EPD_LUT_64K);
+  // Set VCOM for boards that allow to set this in software (in mV).
+  epd_set_vcom(1560);
+  hl = epd_hl_init(EPD_BUILTIN_WAVEFORM);
+  fb = epd_hl_get_framebuffer(&hl);
+  printf("after epd_hl_init() Free PSRAM: %d\n", getFreePsram());
+
+
+  epd_poweron();  
+  color_test();
+  printf("color example\n");
+
+  vTaskDelay(pdMS_TO_TICKS(5000));
+  esp_sleep_enable_timer_wakeup(DEEP_SLEEP_SECONDS * USEC);
+  esp_deep_sleep_start();
+}
+
+#endif

examples/www-image/main/CMakeLists.txt

@@ -1,6 +1,7 @@
 set(        
-    app_sources "jpg-render.c"
+    #app_sources "jpg-render.c"
     #app_sources "jpgdec-render.cpp"
+    app_sources "jpg-render-color.c"
     )
 
 idf_component_register(SRCS ${app_sources}