Code:
void i2c0_ssd1306_task( void *pvParameters ) {
// initialize the xLastWakeTime variable with the current time.
TickType_t last_wake_time = xTaskGetTickCount ();
//
// initialize i2c device configuration
i2c_ssd1306_config_t dev_cfg = I2C_SSD1306_128x64_CONFIG_DEFAULT;
i2c_ssd1306_handle_t dev_hdl;
//
// init device
i2c_ssd1306_init(i2c0_bus_hdl, &dev_cfg, &dev_hdl);
if (dev_hdl == NULL) {
ESP_LOGE(APP_TAG, "ssd1306 handle init failed");
assert(dev_hdl);
}
//
// task loop entry point
for ( ;; ) {
ESP_LOGI(APP_TAG, "######################## SSD1306 - START #########################");
//
int center = 1, top = 1, bottom = 4;
char lineChar[16];
uint8_t image[24];
ESP_LOGI(APP_TAG, "Panel is 128x64");
// Display x3 text
ESP_LOGI(APP_TAG, "Display x3 Text");
i2c_ssd1306_clear_display(dev_hdl, false);
i2c_ssd1306_set_display_contrast(dev_hdl, 0xff);
i2c_ssd1306_display_text_x3(dev_hdl, 0, "Hello", 5, false);
vTaskDelay(3000 / portTICK_PERIOD_MS);
// Display bitmap icons
ESP_LOGI(APP_TAG, "Display bitmap icons");
i2c_ssd1306_set_display_contrast(dev_hdl, 0xff);
i2c_ssd1306_clear_display(dev_hdl, false);
i2c_ssd1306_display_bitmap(dev_hdl, 31, 0, data_rx_img_32x32, 32, 32, false);
vTaskDelay(500 / portTICK_PERIOD_MS);
i2c_ssd1306_display_bitmap(dev_hdl, 31, 0, data_tx_img_32x32, 32, 32, false);
vTaskDelay(1000 / portTICK_PERIOD_MS);
// Display x2 text
ESP_LOGI(APP_TAG, "Display x2 Text");
i2c_ssd1306_clear_display(dev_hdl, false);
i2c_ssd1306_set_display_contrast(dev_hdl, 0xff);
i2c_ssd1306_display_text_x2(dev_hdl, 0, "{xTEXTx}", 8, false);
i2c_ssd1306_display_text_x2(dev_hdl, 2, " X2-X2", 6, false);
vTaskDelay(3000 / portTICK_PERIOD_MS);
// Display text
ESP_LOGI(APP_TAG, "Display Text");
i2c_ssd1306_clear_display(dev_hdl, false);
i2c_ssd1306_set_display_contrast(dev_hdl, 0xff);
i2c_ssd1306_display_text(dev_hdl, 0, "SSD1306 128x64", 14, false);
i2c_ssd1306_display_text(dev_hdl, 1, "Hello World!!", 13, false);
i2c_ssd1306_display_text(dev_hdl, 2, "SSD1306 128x64", 14, true);
i2c_ssd1306_display_text(dev_hdl, 3, "Hello World!!", 13, true);
vTaskDelay(3000 / portTICK_PERIOD_MS);
// Display Count Down
ESP_LOGI(APP_TAG, "Display Count Down");
memset(image, 0, sizeof(image));
i2c_ssd1306_display_image(dev_hdl, top, (6*8-1), image, sizeof(image));
i2c_ssd1306_display_image(dev_hdl, top+1, (6*8-1), image, sizeof(image));
i2c_ssd1306_display_image(dev_hdl, top+2, (6*8-1), image, sizeof(image));
for(int font = 0x39; font > 0x30; font--) {
memset(image, 0, sizeof(image));
i2c_ssd1306_display_image(dev_hdl, top+1, (7*8-1), image, 8);
memcpy(image, font8x8_latin_tr, 8);
if (dev_hdl->flip_enabled) i2c_ssd1306_flip_buffer(image, 8);
i2c_ssd1306_display_image(dev_hdl, top+1, (7*8-1), image, 8);
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
// Page Down
ESP_LOGI(APP_TAG, "Page Down");
i2c_ssd1306_clear_display(dev_hdl, false);
i2c_ssd1306_set_display_contrast(dev_hdl, 0xff);
i2c_ssd1306_display_text(dev_hdl, 0, "---Page DOWN---", 16, true);
i2c_ssd1306_set_software_scroll(dev_hdl, 1, (dev_hdl->pages-1) );
for (int page = 0; page < bottom+10; page++) {
if ( (page % (dev_hdl->pages-1)) == 0) i2c_ssd1306_clear_scroll_display(dev_hdl);
lineChar[0] = 0x02;
sprintf(&lineChar[1], " Line %02d", page);
i2c_ssd1306_display_scroll_text(dev_hdl, lineChar, strlen(lineChar), false);
vTaskDelay(500 / portTICK_PERIOD_MS);
}
vTaskDelay(3000 / portTICK_PERIOD_MS);
// Horizontal Scroll
ESP_LOGI(APP_TAG, "Horizontal Scroll");
i2c_ssd1306_clear_display(dev_hdl, false);
i2c_ssd1306_set_display_contrast(dev_hdl, 0xff);
i2c_ssd1306_display_text(dev_hdl, center, "Horizontal", 10, false);
i2c_ssd1306_set_hardware_scroll(dev_hdl, I2C_SSD1306_SCROLL_RIGHT, I2C_SSD1306_SCROLL_2_FRAMES);
vTaskDelay(5000 / portTICK_PERIOD_MS);
i2c_ssd1306_set_hardware_scroll(dev_hdl, I2C_SSD1306_SCROLL_LEFT, I2C_SSD1306_SCROLL_2_FRAMES);
vTaskDelay(5000 / portTICK_PERIOD_MS);
i2c_ssd1306_set_hardware_scroll(dev_hdl, I2C_SSD1306_SCROLL_STOP, I2C_SSD1306_SCROLL_2_FRAMES);
// Vertical Scroll
ESP_LOGI(APP_TAG, "Vertical Scroll");
i2c_ssd1306_clear_display(dev_hdl, false);
i2c_ssd1306_set_display_contrast(dev_hdl, 0xff);
i2c_ssd1306_display_text(dev_hdl, center, "Vertical", 8, false);
i2c_ssd1306_set_hardware_scroll(dev_hdl, I2C_SSD1306_SCROLL_DOWN, I2C_SSD1306_SCROLL_2_FRAMES);
vTaskDelay(5000 / portTICK_PERIOD_MS);
i2c_ssd1306_set_hardware_scroll(dev_hdl, I2C_SSD1306_SCROLL_UP, I2C_SSD1306_SCROLL_2_FRAMES);
vTaskDelay(5000 / portTICK_PERIOD_MS);
i2c_ssd1306_set_hardware_scroll(dev_hdl, I2C_SSD1306_SCROLL_STOP, I2C_SSD1306_SCROLL_2_FRAMES);
// Bitmaps
ESP_LOGI(APP_TAG, "Bitmaps");
i2c_ssd1306_display_text(dev_hdl, 1, "BATMAN", 6, false);
int bitmapWidth = 4*8;
int width = dev_hdl->width;
int xpos = width / 2; // center of width
xpos = xpos - bitmapWidth/2;
int ypos = 16;
ESP_LOGD(APP_TAG, "width=%d xpos=%d", width, xpos);
i2c_ssd1306_display_bitmap(dev_hdl, xpos, ypos, batman, 32, 13, false);
vTaskDelay(3000 / portTICK_PERIOD_MS);
for(int i=0;i<128;i++) {
i2c_ssd1306_set_display_wrap_arround(dev_hdl, I2C_SSD1306_SCROLL_RIGHT, 2, 3, 0);
}
vTaskDelay(2000 / portTICK_PERIOD_MS);
i2c_ssd1306_clear_display(dev_hdl, false);
i2c_ssd1306_display_bitmap(dev_hdl, 0, 0, fleischer, 128, 64, false);
vTaskDelay(2000 / portTICK_PERIOD_MS);
// Invert
ESP_LOGI(APP_TAG, "Invert");
i2c_ssd1306_clear_display(dev_hdl, true);
i2c_ssd1306_set_display_contrast(dev_hdl, 0xff);
i2c_ssd1306_display_text(dev_hdl, center, " Good Bye!!", 12, true);
vTaskDelay(5000 / portTICK_PERIOD_MS);
// Fade Out
ESP_LOGI(APP_TAG, "Fade Out");
i2c_ssd1306_fadeout_display(dev_hdl);
//
ESP_LOGI(APP_TAG, "######################## SSD1306 - END ###########################");
//
//
// pause the task per defined wait period
vTaskDelaySecUntil( &last_wake_time, I2C0_TASK_SAMPLING_RATE + 10 );
}
//
// free resources
i2c_ssd1306_delete( dev_hdl );
vTaskDelete( NULL );
}
![[Image: 1AjSOhWGY7Vq9yZ1nK5C_iwLsPlDhnFFJ]](https://lh3.googleusercontent.com/d/1AjSOhWGY7Vq9yZ1nK5C_iwLsPlDhnFFJ)
