Cleanup

.devcontainer/Dockerfile

@@ -1,13 +0,0 @@
-ARG DOCKER_TAG=latest
-FROM espressif/idf:${DOCKER_TAG}
-
-ENV LC_ALL=C.UTF-8
-ENV LANG=C.UTF-8
-
-RUN apt-get update -y && apt-get install udev -y
-
-RUN echo "source /opt/esp/idf/export.sh > /dev/null 2>&1" >> ~/.bashrc
-
-ENTRYPOINT [ "/opt/esp/entrypoint.sh" ]
-
-CMD ["/bin/bash", "-c"]

.devcontainer/devcontainer.json

@@ -1,21 +0,0 @@
-{
-	"name": "ESP-IDF QEMU",
-	"build": {
-		"dockerfile": "Dockerfile"
-	},
-	"customizations": {
-		"vscode": {
-			"settings": {
-				"terminal.integrated.defaultProfile.linux": "bash",
-				"idf.espIdfPath": "/opt/esp/idf",
-				"idf.toolsPath": "/opt/esp",
-				"idf.gitPath": "/usr/bin/git"
-			},
-			"extensions": [
-				"espressif.esp-idf-extension",
-				"espressif.esp-idf-web"
-			]
-		}
-	},
-	"runArgs": ["--privileged"]
-}

.gitignore

@@ -1,3 +1,9 @@
-build/
-sdkconfig
-sdkconfig.old
+*
+!*/
+!components/**
+!main/**
+!.gitignore
+!.gitmodules
+!CMakeLists.txt
+!dependencies.lock
+!README.md

.vscode/c_cpp_properties.json

@@ -1,23 +0,0 @@
-{
-  "configurations": [
-    {
-      "name": "ESP-IDF",
-      "compilerPath": "${config:idf.toolsPath}/tools/xtensa-esp-elf/esp-14.2.0_20241119/xtensa-esp-elf/bin/xtensa-esp32-elf-gcc",
-      "compileCommands": "${config:idf.buildPath}/compile_commands.json",
-      "includePath": [
-        "${config:idf.espIdfPath}/components/**",
-        "${config:idf.espIdfPathWin}/components/**",
-        "${workspaceFolder}/**"
-      ],
-      "browse": {
-        "path": [
-          "${config:idf.espIdfPath}/components",
-          "${config:idf.espIdfPathWin}/components",
-          "${workspaceFolder}"
-        ],
-        "limitSymbolsToIncludedHeaders": true
-      }
-    }
-  ],
-  "version": 4
-}

.vscode/launch.json

@@ -1,15 +0,0 @@
-{
-  "version": "0.2.0",
-  "configurations": [
-    {
-      "type": "gdbtarget",
-      "request": "attach",
-      "name": "Eclipse CDT GDB Adapter"
-    },
-    {
-      "type": "espidf",
-      "name": "Launch",
-      "request": "launch"
-    }
-  ]
-}

.vscode/settings.json

@@ -1,14 +0,0 @@
-{
-  "C_Cpp.intelliSenseEngine": "default",
-  "idf.espIdfPath": "/home/sirian/esp/esp-idf",
-  "idf.pythonInstallPath": "/usr/bin/python3",
-  "idf.openOcdConfigs": [
-    "board/esp32-wrover-kit-3.3v.cfg"
-  ],
-  "idf.port": "/dev/ttyS1",
-  "idf.toolsPath": "/home/sirian/.espressif",
-  "idf.customExtraVars": {
-    "IDF_TARGET": "esp32"
-  },
-  "idf.flashType": "UART"
-}

README.md

@@ -1,32 +1,11 @@
-# _Sample project_
+# OLED display counter
 
-(See the README.md file in the upper level 'examples' directory for more information about examples.)
+A simple counter on an oled display.
 
-This is the simplest buildable example. The example is used by command `idf.py create-project`
-that copies the project to user specified path and set it's name. For more information follow the [docs page](https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html#start-a-new-project)
+## References
 
+- [Esp32 programming guide](https://docs.espressif.com/projects/esp-idf/en/stable/esp32/get-started/index.html)
+- [Esp32 datasheet](https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf)
+- [SSD1306 datasheet](https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf)
+- [lvgl programming guide](https://docs.lvgl.io/master/intro/introduction/index.html)
 
-
-## How to use example
-We encourage the users to use the example as a template for the new projects.
-A recommended way is to follow the instructions on a [docs page](https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html#start-a-new-project).
-
-## Example folder contents
-
-The project **sample_project** contains one source file in C language [main.c](main/main.c). The file is located in folder [main](main).
-
-ESP-IDF projects are built using CMake. The project build configuration is contained in `CMakeLists.txt`
-files that provide set of directives and instructions describing the project's source files and targets
-(executable, library, or both). 
-
-Below is short explanation of remaining files in the project folder.
-
-```
-├── CMakeLists.txt
-├── main
-│   ├── CMakeLists.txt
-│   └── main.c
-└── README.md                  This is the file you are currently reading
-```
-Additionally, the sample project contains Makefile and component.mk files, used for the legacy Make based build system. 
-They are not used or needed when building with CMake and idf.py.

main/lv_conf.h

@@ -28,8 +28,6 @@
 
 /** Color depth: 1 (I1), 8 (L8), 16 (RGB565), 24 (RGB888), 32 (XRGB8888) */
 #define LV_COLOR_DEPTH 1
-#define LV_COLOR_1_BYTE 1
-#define LV_USE_THEME_MONO 1
 
 /*=========================
    STDLIB WRAPPER SETTINGS
@@ -45,7 +43,7 @@
 #define LV_USE_STDLIB_MALLOC    LV_STDLIB_BUILTIN
 
 /** Possible values
- * - LV_STDLIB_BUILTIN:     LVGL's built in implementation
+ * - LV_STDLIB_BUlILTIN:     LVGL's built in implementation
  * - LV_STDLIB_CLIB:        Standard C functions, like malloc, strlen, etc
  * - LV_STDLIB_MICROPYTHON: MicroPython implementation
  * - LV_STDLIB_RTTHREAD:    RT-Thread implementation
@@ -611,7 +609,7 @@
 #define LV_FONT_MONTSERRAT_18 0
 #define LV_FONT_MONTSERRAT_20 0
 #define LV_FONT_MONTSERRAT_22 0
-#define LV_FONT_MONTSERRAT_24 0
+#define LV_FONT_MONTSERRAT_24 1
 #define LV_FONT_MONTSERRAT_26 0
 #define LV_FONT_MONTSERRAT_28 0
 #define LV_FONT_MONTSERRAT_30 0
@@ -621,7 +619,7 @@
 #define LV_FONT_MONTSERRAT_38 0
 #define LV_FONT_MONTSERRAT_40 0
 #define LV_FONT_MONTSERRAT_42 0
-#define LV_FONT_MONTSERRAT_44 0
+#define LV_FONT_MONTSERRAT_44 1
 #define LV_FONT_MONTSERRAT_46 0
 #define LV_FONT_MONTSERRAT_48 0
 

main/main.c

@@ -5,30 +5,25 @@
 #include "freertos/task.h"
 
 #define LV_CONF_INCLUDE_SIMPLE 1
-#include "lv_conf.h"
 
+#include "lv_conf.h"
 #include "lvgl.h"
 
+#define I2C_SCL  19
+#define I2C_SDA  21
 
-#define I2C_SCL 19
-#define I2C_SDA 21
+#define DISP_ADDRESS  0X3c
+#define I2C_FREQ      400000
 
-/* Docs: https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf */
-#define DISP_ADDRESS 0X3c
-#define I2C_FREQ 100000
-
-static i2c_master_dev_handle_t disp_handle;
-
-static lv_obj_t *counter_label;
-
-static SemaphoreHandle_t flush_sem = NULL;
-
-static lv_color_t lv_buf[128 * 64];
+static i2c_master_dev_handle_t  disp_handle;
+static lv_obj_t                 *counter_label;
+static SemaphoreHandle_t        flush_sem = NULL;
+static uint8_t                  lv_buf[(128 * 64/8)+8];
 
 void init_i2c(void){
     i2c_master_bus_config_t i2c_mst_config = {
         .clk_source = I2C_CLK_SRC_DEFAULT,
-        .i2c_port = I2C_NUM_0,
+        .i2c_port   = I2C_NUM_0,
         .scl_io_num = I2C_SCL,
         .sda_io_num = I2C_SDA,
         .glitch_ignore_cnt = 7,
@@ -44,7 +39,7 @@ void init_i2c(void){
         .scl_speed_hz = I2C_FREQ,
     };
 
-    ESP_ERROR_CHECK(i2c_master_bus_add_device(bus_handle, &dev_cfg, &disp_handle));
+    i2c_master_bus_add_device(bus_handle, &dev_cfg, &disp_handle);
 
 
 }
@@ -54,28 +49,16 @@ void i2c_disp_send_cmd(uint8_t cmd){
     
     i2c_master_transmit(disp_handle, data, sizeof(data), pdMS_TO_TICKS(1000));
     
-
-    vTaskDelay(pdMS_TO_TICKS(1));
 }
 
 
-/*void i2c_disp_send_data(uint8_t *data, size_t len){
-    uint8_t *buf = malloc(len + 1);
-    buf[0] = 0x40; data mode 
-    memcpy(&buf[1], data, len);
-    ESP_ERROR_CHECK(
-        i2c_master_transmit(disp_handle, buf, len + 1, pdMS_TO_TICKS(100)));
-    free(buf);
-}*/
 void i2c_disp_send_data(uint8_t *data, size_t len){
-    
     uint8_t *buf = malloc(len+1);
-    buf[0] = 0x40;
+    buf[0] = 0x40; /*data mode*/
     memcpy(&buf[1], data, len);
-    esp_err_t ret = i2c_master_transmit(disp_handle, buf, len+1, pdMS_TO_TICKS(2000));
-    free(buf);
-    return;
 
+    i2c_master_transmit(disp_handle, buf, len+1, pdMS_TO_TICKS(2000));
+    free(buf);
 }
 
 void init_display(void){
@@ -99,8 +82,8 @@ void init_display(void){
     i2c_disp_send_cmd(0x20); // Set Memory Addressing Mode
     i2c_disp_send_cmd(0x00); // Horizontal addressing mode
 
-    i2c_disp_send_cmd(0xA0); // Set segment re-map (A0h/A1h)
-    i2c_disp_send_cmd(0xC0); // Set COM output scan direction
+    i2c_disp_send_cmd(0xA1); // Set segment re-map (A0h/A1h)
+    i2c_disp_send_cmd(0xC8); // Set COM output scan direction
 
     i2c_disp_send_cmd(0xDA); // Set COM pins hardware configuration
     i2c_disp_send_cmd(0x12); // Alternative COM pin config
@@ -122,57 +105,61 @@ void init_display(void){
     i2c_disp_send_cmd(0xAF); // Display ON
 }
 
-void lvgl_flush_callback(lv_display_t *disp, const lv_area_t *area, uint8_t *px_map)
-{
-    printf("FLUSH CALLED! area: (%ld,%ld)-(%ld,%ld)\n", (long)area->x1, (long)area->y1, (long)area->x2, (long)area->y2);
+void lvgl_flush_callback(lv_display_t *disp, const lv_area_t *area, uint8_t *px_map){
 
-    if (flush_sem == NULL)
-    {
+    if (flush_sem == NULL){
         lv_display_flush_ready(disp);
         return;
     }
     xSemaphoreTake(flush_sem, portMAX_DELAY);
 
-
     uint16_t width = 128;
     uint16_t height = 64;
-    uint16_t pages = height/8;
 
-    static uint8_t buf[128*8];
+    uint8_t buf[128];
     memset(buf, 0, sizeof(buf));
 
-    uint8_t *pixels = px_map;
+    uint16_t bytes = (width * height + 7) / 8;
+    uint16_t bytes_per_row = width / 8;
+    uint16_t bytes_per_page = bytes_per_row*8;
+    uint8_t page = 0;
+    uint8_t page_x = 0;
+    uint8_t page_y = 0;
+    uint8_t byte;
 
-    printf("Center pixels (64,32): %d %d %d %d\n",
-           pixels[32 * 128 + 62], pixels[32 * 128 + 63],
-           pixels[32 * 128 + 64], pixels[32 * 128 + 65]);
+    px_map += 8;
 
-    for(uint8_t page = 0; page < pages; page++){
-        for(uint16_t x = 0; x < width; x++){
+    /*converted pixels to page format*/
+    for (uint16_t i = 0; i <= bytes; i++){
+        byte = px_map[i];
 
-            uint8_t byte = 0;
-            for(uint8_t bit = 0; bit < 8; bit++){
-                uint16_t y = page*8 + bit;
-                if(pixels[y*width+x] != 0){
-                    byte |= (1<<bit);
-                }
+        for (int bit = 7; bit >= 0; bit--){ 
+            if (byte & (1 << bit)){
+                buf[page_x] |= (1 << page_y);
             }
-            buf[page*width+x] = byte;
+            ++page_x;
+        }
+        if ((i+1) % bytes_per_row == 0 && i+1 != 0){
+            page_y++;
+            page_x = 0;
             
         }
+        if((i+1)% bytes_per_page == 0 && i+1 != 0){
+            /*page finished => send to display*/
+            i2c_disp_send_cmd(0x21);
+            i2c_disp_send_cmd(0);
+            i2c_disp_send_cmd(127);
+            i2c_disp_send_cmd(0x22);
+            i2c_disp_send_cmd(page);
+            i2c_disp_send_cmd(page);
+            
+            i2c_disp_send_data(buf, sizeof(buf));
+            memset(buf, 0, sizeof(buf));
+            page++;
+            page_y = 0;
+        }
     }
 
-    i2c_disp_send_cmd(0x21);
-    i2c_disp_send_cmd(0);
-    i2c_disp_send_cmd(width-1);
-
-    i2c_disp_send_cmd(0x22);
-    i2c_disp_send_cmd(0);
-    i2c_disp_send_cmd(pages-1);
-
-   
-    i2c_disp_send_data(buf, sizeof(buf));
-
     lv_display_flush_ready(disp);
     xSemaphoreGive(flush_sem);
 }
@@ -183,17 +170,21 @@ void init_graphics(void){
         xSemaphoreGive(flush_sem);
     }
 
-    lv_init();
-    printf("LVGL initialized\n");
+    memset(lv_buf, 0, sizeof(lv_buf));
 
-    printf("LV_COLOR_DEPTH = %d\n", LV_COLOR_DEPTH);
+    lv_init();
 
     lv_display_t *display = lv_display_create(128, 64);
-    printf("Display created\n");
+    lv_display_set_color_format(display, LV_COLOR_FORMAT_I1);
+
     lv_display_set_flush_cb(display, lvgl_flush_callback);
-    printf("Flush callback set\n");
+
     lv_display_set_buffers(display, lv_buf, NULL, sizeof(lv_buf), LV_DISPLAY_RENDER_MODE_FULL);
-    printf("lvgl buffers set");
+
+    lv_obj_t *scr = lv_screen_active();
+
+    lv_obj_set_style_bg_color(scr, lv_color_black(), 0);
+    lv_obj_set_style_bg_opa(scr, LV_OPA_COVER, 0);
 
 }
 
@@ -207,7 +198,7 @@ void lv_tick_task(void *arg){
 void lv_task(void *arg){
     while(1){
         lv_task_handler();
-        vTaskDelay(pdMS_TO_TICKS(10));
+        vTaskDelay(pdMS_TO_TICKS(50));
     }
 }
 
@@ -226,115 +217,44 @@ void counter_task(void *arg){
             counter++;
         }
 
-        vTaskDelay(pdMS_TO_TICKS(1000));
+        vTaskDelay(pdMS_TO_TICKS(100));
     }
 }
 
 void create_counter(void){
     lv_obj_t *scr = lv_scr_act();
-    lv_obj_set_style_bg_color(scr, lv_color_black(), 0);
-    lv_obj_set_style_bg_opa(scr, LV_OPA_COVER, 0);
 
-    counter_label = lv_label_create(lv_scr_act());
+
+    counter_label = lv_label_create(scr);
     printf("Label created");
-    lv_obj_set_style_text_color(counter_label, lv_color_white(), 0);
-    //lv_obj_set_style_text_font(counter_label, &lv_font_montserrat_12, 0);
     lv_label_set_text(counter_label, "00");
+    lv_obj_set_style_text_color(counter_label, lv_color_white(), 0);
+    lv_obj_set_style_text_font(counter_label, &lv_font_montserrat_44, 0);
+    lv_obj_set_style_pad_all(counter_label, 0, 0);
+    lv_obj_set_style_margin_all(counter_label, 0, 0);
+    lv_obj_set_width(counter_label, LV_SIZE_CONTENT);
+    lv_obj_set_style_text_align(counter_label, LV_TEXT_ALIGN_LEFT, 0);
     lv_obj_align(counter_label, LV_ALIGN_CENTER, 0, 0);
     
-    xTaskCreate(counter_task, "counter_task", 2048, NULL, 5, NULL);
+    xTaskCreate(counter_task, "counter_task", 2048, NULL, 1, NULL);
     printf("Counter task created"); 
 }
 
-void clear_display(void)
-{
-    printf("Clearing display...\n");
-
-    i2c_disp_send_cmd(0x21);
-    i2c_disp_send_cmd(0);
-    i2c_disp_send_cmd(127);
-    i2c_disp_send_cmd(0x22);
-    i2c_disp_send_cmd(0);
-    i2c_disp_send_cmd(7);
-
-    uint8_t zeros[128];
-    memset(zeros, 0x00, 128);
-
-    for (int page = 0; page < 8; page++)
-    {
-        i2c_disp_send_data(zeros, 128);
-    }
-
-    printf("Cleared!\n");
-}
-
-void draw_text_ok(void)
-{
-    printf("Drawing 'OK'...\n");
-
-    uint8_t letter_O[8] = {
-        0b00000000, // column 0 (tyhjä)
-        0b01111110, // column 1 (vasen reuna)
-        0b10000001, // column 2
-        0b10000001, // column 3
-        0b10000001, // column 4
-        0b01111110, // column 5 (oikea reuna)
-        0b00000000, // column 6 (tyhjä)
-        0b00000000  // column 7 (väli)
-    };
-
-    // Kirjain K
-    uint8_t letter_K[8] = {
-        0b00000000, // column 0 (tyhjä)
-        0b11111111, // column 1 (pystyviiva)
-        0b00011000, // column 2
-        0b00100100, // column 3
-        0b01000010, // column 4
-        0b10000001, // column 5
-        0b00000000, // column 6 (tyhjä)
-        0b00000000  // column 7
-    };
-
-    // Aseta page 3 (keskellä näyttöä), column 50
-    i2c_disp_send_cmd(0x21);
-    i2c_disp_send_cmd(50);
-    i2c_disp_send_cmd(127);
-    i2c_disp_send_cmd(0x22);
-    i2c_disp_send_cmd(3);
-    i2c_disp_send_cmd(3);
-
-    // Lähetä "OK"
-    i2c_disp_send_data(letter_O, 8);
-    i2c_disp_send_data(letter_K, 8);
-
-    printf("'OK' drawn!\n");
-}
 
 void app_main(void){
     init_i2c();
-    vTaskDelay(pdMS_TO_TICKS(100));
+    vTaskDelay(pdMS_TO_TICKS(50));
+    
     init_display();
-
-    
-    vTaskDelay(pdMS_TO_TICKS(200));
+    vTaskDelay(pdMS_TO_TICKS(50));
 
     init_graphics();
-    vTaskDelay(pdMS_TO_TICKS(500)); 
-
-    
-    create_counter(); 
-
-    vTaskDelay(pdMS_TO_TICKS(500));
+    vTaskDelay(pdMS_TO_TICKS(50));
 
     xTaskCreate(lv_tick_task, "lv_tick", 4096, NULL, 1, NULL);
-    xTaskCreate(lv_task, "lv_task", 8192, NULL, 5, NULL);
+    xTaskCreate(lv_task, "lv_task", 8192, NULL, 3, NULL);
 
+    vTaskDelay(pdMS_TO_TICKS(150));
 
-
-    /*while(1){
-        clear_display();
-        vTaskDelay(pdMS_TO_TICKS(1000));
-        draw_text_ok();
-        vTaskDelay(pdMS_TO_TICKS(1000));
-    }*/
+    create_counter();
 }