From 8631e4544bc6284b801169698abca7ebfbdac09e Mon Sep 17 00:00:00 2001 From: Vilem Zavodny Date: Thu, 3 Nov 2022 09:04:26 +0100 Subject: [PATCH] lcd: Support rotation SSD1306 and changed example for using LVGL port component. --- .../esp_lcd/src/esp_lcd_panel_ssd1306.c | 21 +++- .../lcd/i2c_oled/main/i2c_oled_example_main.c | 102 +++++------------- .../lcd/i2c_oled/main/lvgl_demo_ui.c | 3 +- 3 files changed, 45 insertions(+), 81 deletions(-) diff --git a/components/esp_lcd/src/esp_lcd_panel_ssd1306.c b/components/esp_lcd/src/esp_lcd_panel_ssd1306.c index 86d73bfde8..8d78eba72c 100644 --- a/components/esp_lcd/src/esp_lcd_panel_ssd1306.c +++ b/components/esp_lcd/src/esp_lcd_panel_ssd1306.c @@ -56,6 +56,7 @@ typedef struct { int x_gap; int y_gap; unsigned int bits_per_pixel; + bool swap_axes; } ssd1306_panel_t; esp_err_t esp_lcd_new_panel_ssd1306(const esp_lcd_panel_io_handle_t io, const esp_lcd_panel_dev_config_t *panel_dev_config, esp_lcd_panel_handle_t *ret_panel) @@ -143,6 +144,8 @@ static esp_err_t panel_ssd1306_init(esp_lcd_panel_t *panel) esp_lcd_panel_io_tx_param(io, SSD1306_CMD_SET_CHARGE_PUMP, (uint8_t[]) { 0x14 // enable charge pump }, 1); + esp_lcd_panel_io_tx_param(io, SSD1306_CMD_MIRROR_X_OFF, NULL, 0); + esp_lcd_panel_io_tx_param(io, SSD1306_CMD_MIRROR_Y_OFF, NULL, 0); return ESP_OK; } @@ -151,11 +154,22 @@ static esp_err_t panel_ssd1306_draw_bitmap(esp_lcd_panel_t *panel, int x_start, ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base); assert((x_start < x_end) && (y_start < y_end) && "start position must be smaller than end position"); esp_lcd_panel_io_handle_t io = ssd1306->io; + // adding extra gap x_start += ssd1306->x_gap; x_end += ssd1306->x_gap; y_start += ssd1306->y_gap; y_end += ssd1306->y_gap; + + if (ssd1306->swap_axes) { + int x = x_start; + x_start = y_start; + y_start = x; + x = x_end; + x_end = y_end; + y_end = x; + } + // one page contains 8 rows (COMs) uint8_t page_start = y_start / 8; uint8_t page_end = (y_end - 1) / 8; @@ -204,7 +218,7 @@ static esp_err_t panel_ssd1306_mirror(esp_lcd_panel_t *panel, bool mirror_x, boo if (mirror_y) { command = SSD1306_CMD_MIRROR_Y_ON; } else { - command = SSD1306_CMD_MIRROR_X_OFF; + command = SSD1306_CMD_MIRROR_Y_OFF; } esp_lcd_panel_io_tx_param(io, command, NULL, 0); return ESP_OK; @@ -212,7 +226,10 @@ static esp_err_t panel_ssd1306_mirror(esp_lcd_panel_t *panel, bool mirror_x, boo static esp_err_t panel_ssd1306_swap_xy(esp_lcd_panel_t *panel, bool swap_axes) { - return ESP_ERR_NOT_SUPPORTED; + ssd1306_panel_t *ssd1306 = __containerof(panel, ssd1306_panel_t, base); + ssd1306->swap_axes = swap_axes; + + return ESP_OK; } static esp_err_t panel_ssd1306_set_gap(esp_lcd_panel_t *panel, int x_gap, int y_gap) diff --git a/examples/peripherals/lcd/i2c_oled/main/i2c_oled_example_main.c b/examples/peripherals/lcd/i2c_oled/main/i2c_oled_example_main.c index f21f5654c6..6545ba2bd2 100644 --- a/examples/peripherals/lcd/i2c_oled/main/i2c_oled_example_main.c +++ b/examples/peripherals/lcd/i2c_oled/main/i2c_oled_example_main.c @@ -15,6 +15,7 @@ #include "esp_err.h" #include "esp_log.h" #include "lvgl.h" +#include "esp_lvgl_port.h" static const char *TAG = "example"; @@ -40,54 +41,17 @@ static const char *TAG = "example"; extern void example_lvgl_demo_ui(lv_disp_t *disp); +static lv_disp_t * disp; + static bool example_notify_lvgl_flush_ready(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_io_event_data_t *edata, void *user_ctx) { - lv_disp_drv_t *disp_driver = (lv_disp_drv_t *)user_ctx; - lv_disp_flush_ready(disp_driver); + lv_disp_t ** disp = (lv_disp_t **)user_ctx; + lvgl_port_flush_ready(*disp); return false; } -static void example_lvgl_flush_cb(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_map) -{ - esp_lcd_panel_handle_t panel_handle = (esp_lcd_panel_handle_t) drv->user_data; - int offsetx1 = area->x1; - int offsetx2 = area->x2; - int offsety1 = area->y1; - int offsety2 = area->y2; - // copy a buffer's content to a specific area of the display - esp_lcd_panel_draw_bitmap(panel_handle, offsetx1, offsety1, offsetx2 + 1, offsety2 + 1, color_map); -} - -static void example_lvgl_set_px_cb(lv_disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y, - lv_color_t color, lv_opa_t opa) -{ - uint16_t byte_index = x + (( y >> 3 ) * buf_w); - uint8_t bit_index = y & 0x7; - - if ((color.full == 0) && (LV_OPA_TRANSP != opa)) { - buf[byte_index] |= (1 << bit_index); - } else { - buf[byte_index] &= ~(1 << bit_index); - } -} - -static void example_lvgl_rounder(lv_disp_drv_t *disp_drv, lv_area_t *area) -{ - area->y1 = area->y1 & (~0x7); - area->y2 = area->y2 | 0x7; -} - -static void example_increase_lvgl_tick(void *arg) -{ - /* Tell LVGL how many milliseconds has elapsed */ - lv_tick_inc(EXAMPLE_LVGL_TICK_PERIOD_MS); -} - void app_main(void) { - static lv_disp_draw_buf_t disp_buf; // contains internal graphic buffer(s) called draw buffer(s) - static lv_disp_drv_t disp_drv; // contains callback functions - ESP_LOGI(TAG, "Initialize I2C bus"); i2c_config_t i2c_conf = { .mode = I2C_MODE_MASTER, @@ -109,7 +73,7 @@ void app_main(void) .lcd_cmd_bits = EXAMPLE_LCD_CMD_BITS, // According to SSD1306 datasheet .lcd_param_bits = EXAMPLE_LCD_CMD_BITS, // According to SSD1306 datasheet .on_color_trans_done = example_notify_lvgl_flush_ready, - .user_ctx = &disp_drv, + .user_ctx = &disp, }; ESP_ERROR_CHECK(esp_lcd_new_panel_io_i2c((esp_lcd_i2c_bus_handle_t)I2C_HOST, &io_config, &io_handle)); @@ -125,45 +89,27 @@ void app_main(void) ESP_ERROR_CHECK(esp_lcd_panel_init(panel_handle)); ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true)); - ESP_LOGI(TAG, "Initialize LVGL library"); - lv_init(); - // alloc draw buffers used by LVGL - // it's recommended to choose the size of the draw buffer(s) to be at least 1/10 screen sized - lv_color_t *buf1 = malloc(EXAMPLE_LCD_H_RES * 20 * sizeof(lv_color_t)); - assert(buf1); - lv_color_t *buf2 = malloc(EXAMPLE_LCD_H_RES * 20 * sizeof(lv_color_t)); - assert(buf2); - // initialize LVGL draw buffers - lv_disp_draw_buf_init(&disp_buf, buf1, buf2, EXAMPLE_LCD_H_RES * 20); + ESP_LOGI(TAG, "Initialize LVGL"); + const lvgl_port_cfg_t lvgl_cfg = ESP_LVGL_PORT_INIT_CONFIG(); + lvgl_port_init(&lvgl_cfg); - ESP_LOGI(TAG, "Register display driver to LVGL"); - lv_disp_drv_init(&disp_drv); - disp_drv.hor_res = EXAMPLE_LCD_H_RES; - disp_drv.ver_res = EXAMPLE_LCD_V_RES; - disp_drv.flush_cb = example_lvgl_flush_cb; - disp_drv.draw_buf = &disp_buf; - disp_drv.user_data = panel_handle; - disp_drv.rounder_cb = example_lvgl_rounder; - disp_drv.set_px_cb = example_lvgl_set_px_cb; - lv_disp_t *disp = lv_disp_drv_register(&disp_drv); - - ESP_LOGI(TAG, "Install LVGL tick timer"); - // Tick interface for LVGL (using esp_timer to generate 2ms periodic event) - const esp_timer_create_args_t lvgl_tick_timer_args = { - .callback = &example_increase_lvgl_tick, - .name = "lvgl_tick" + const lvgl_port_display_cfg_t disp_cfg = { + .handle = panel_handle, + .buffer_size = EXAMPLE_LCD_H_RES * EXAMPLE_LCD_V_RES, + .double_buffer = true, + .hres = EXAMPLE_LCD_H_RES, + .vres = EXAMPLE_LCD_V_RES, + .monochrome = true, + .rotation = { + .swap_xy = false, + .mirror_x = false, + .mirror_y = false, + } }; - esp_timer_handle_t lvgl_tick_timer = NULL; - ESP_ERROR_CHECK(esp_timer_create(&lvgl_tick_timer_args, &lvgl_tick_timer)); - ESP_ERROR_CHECK(esp_timer_start_periodic(lvgl_tick_timer, EXAMPLE_LVGL_TICK_PERIOD_MS * 1000)); + disp = lvgl_port_add_disp(&disp_cfg); + /* Rotation of the screen */ + lv_disp_set_rotation(disp, LV_DISP_ROT_NONE); ESP_LOGI(TAG, "Display LVGL Scroll Text"); example_lvgl_demo_ui(disp); - - while (1) { - // raise the task priority of LVGL and/or reduce the handler period can improve the performance - vTaskDelay(pdMS_TO_TICKS(10)); - // The task running lv_timer_handler should have lower priority than that running `lv_tick_inc` - lv_timer_handler(); - } } diff --git a/examples/peripherals/lcd/i2c_oled/main/lvgl_demo_ui.c b/examples/peripherals/lcd/i2c_oled/main/lvgl_demo_ui.c index fe165fde7d..251ef5bc97 100644 --- a/examples/peripherals/lcd/i2c_oled/main/lvgl_demo_ui.c +++ b/examples/peripherals/lcd/i2c_oled/main/lvgl_demo_ui.c @@ -12,6 +12,7 @@ void example_lvgl_demo_ui(lv_disp_t *disp) lv_obj_t *label = lv_label_create(scr); lv_label_set_long_mode(label, LV_LABEL_LONG_SCROLL_CIRCULAR); /* Circular scroll */ lv_label_set_text(label, "Hello Espressif, Hello LVGL."); - lv_obj_set_width(label, 128); + /* Size of the screen (if you use rotation 90 or 270, please set disp->driver->ver_res) */ + lv_obj_set_width(label, disp->driver->hor_res); lv_obj_align(label, LV_ALIGN_TOP_MID, 0, 0); }