|
|
@@ -0,0 +1,187 @@
|
|
|
+/* LCD LVGL porting example
|
|
|
+
|
|
|
+ This example code is in the Public Domain (or CC0 licensed, at your option.)
|
|
|
+
|
|
|
+ Unless required by applicable law or agreed to in writing, this
|
|
|
+ software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
|
|
|
+ CONDITIONS OF ANY KIND, either express or implied.
|
|
|
+*/
|
|
|
+
|
|
|
+#include <stdio.h>
|
|
|
+#include "freertos/FreeRTOS.h"
|
|
|
+#include "freertos/task.h"
|
|
|
+#include "esp_timer.h"
|
|
|
+#include "esp_lcd_panel_io.h"
|
|
|
+#include "esp_lcd_panel_vendor.h"
|
|
|
+#include "esp_lcd_panel_ops.h"
|
|
|
+#include "driver/gpio.h"
|
|
|
+#include "esp_err.h"
|
|
|
+#include "esp_log.h"
|
|
|
+#include "lvgl.h"
|
|
|
+
|
|
|
+static const char *TAG = "example";
|
|
|
+
|
|
|
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
+//////////////////// Please update the following configuration according to your LCD spec //////////////////////////////
|
|
|
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
+#define EXAMPLE_LCD_PIXEL_CLOCK_HZ (10 * 1000 * 1000)
|
|
|
+#define EXAMPLE_LCD_BK_LIGHT_ON_LEVEL 1
|
|
|
+#define EXAMPLE_LCD_BK_LIGHT_OFF_LEVEL !EXAMPLE_LCD_BK_LIGHT_ON_LEVEL
|
|
|
+#define EXAMPLE_PIN_NUM_DATA0 19
|
|
|
+#define EXAMPLE_PIN_NUM_DATA1 21
|
|
|
+#define EXAMPLE_PIN_NUM_DATA2 0
|
|
|
+#define EXAMPLE_PIN_NUM_DATA3 22
|
|
|
+#define EXAMPLE_PIN_NUM_DATA4 23
|
|
|
+#define EXAMPLE_PIN_NUM_DATA5 33
|
|
|
+#define EXAMPLE_PIN_NUM_DATA6 32
|
|
|
+#define EXAMPLE_PIN_NUM_DATA7 27
|
|
|
+#define EXAMPLE_PIN_NUM_PCLK 18
|
|
|
+#define EXAMPLE_PIN_NUM_CS 4
|
|
|
+#define EXAMPLE_PIN_NUM_DC 5
|
|
|
+#define EXAMPLE_PIN_NUM_RST -1
|
|
|
+#define EXAMPLE_PIN_NUM_BK_LIGHT 2
|
|
|
+
|
|
|
+// The pixel number in horizontal and vertical
|
|
|
+#define EXAMPLE_LCD_H_RES 240
|
|
|
+#define EXAMPLE_LCD_V_RES 280
|
|
|
+// Bit number used to represent command and parameter
|
|
|
+#define EXAMPLE_LCD_CMD_BITS 8
|
|
|
+#define EXAMPLE_LCD_PARAM_BITS 8
|
|
|
+
|
|
|
+#define EXAMPLE_LVGL_TICK_PERIOD_MS 2
|
|
|
+
|
|
|
+extern void example_lvgl_demo_ui(lv_obj_t *scr);
|
|
|
+
|
|
|
+static bool example_notify_lvgl_flush_ready(esp_lcd_panel_io_handle_t panel_io, void *user_data, void *event_data)
|
|
|
+{
|
|
|
+ lv_disp_drv_t *disp_driver = (lv_disp_drv_t *)user_data;
|
|
|
+ lv_disp_flush_ready(disp_driver);
|
|
|
+ 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_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, "Turn off LCD backlight");
|
|
|
+ gpio_config_t bk_gpio_config = {
|
|
|
+ .mode = GPIO_MODE_OUTPUT,
|
|
|
+ .pin_bit_mask = 1ULL << EXAMPLE_PIN_NUM_BK_LIGHT
|
|
|
+ };
|
|
|
+ ESP_ERROR_CHECK(gpio_config(&bk_gpio_config));
|
|
|
+ gpio_set_level(EXAMPLE_PIN_NUM_BK_LIGHT, EXAMPLE_LCD_BK_LIGHT_OFF_LEVEL);
|
|
|
+
|
|
|
+ ESP_LOGI(TAG, "Initialize Intel 8080 bus");
|
|
|
+ esp_lcd_i80_bus_handle_t i80_bus = NULL;
|
|
|
+ esp_lcd_i80_bus_config_t bus_config = {
|
|
|
+ .dc_gpio_num = EXAMPLE_PIN_NUM_DC,
|
|
|
+ .wr_gpio_num = EXAMPLE_PIN_NUM_PCLK,
|
|
|
+ .data_gpio_nums = {
|
|
|
+ EXAMPLE_PIN_NUM_DATA0,
|
|
|
+ EXAMPLE_PIN_NUM_DATA1,
|
|
|
+ EXAMPLE_PIN_NUM_DATA2,
|
|
|
+ EXAMPLE_PIN_NUM_DATA3,
|
|
|
+ EXAMPLE_PIN_NUM_DATA4,
|
|
|
+ EXAMPLE_PIN_NUM_DATA5,
|
|
|
+ EXAMPLE_PIN_NUM_DATA6,
|
|
|
+ EXAMPLE_PIN_NUM_DATA7,
|
|
|
+ },
|
|
|
+ .bus_width = 8,
|
|
|
+ .max_transfer_bytes = EXAMPLE_LCD_H_RES * 40 * sizeof(uint16_t)
|
|
|
+ };
|
|
|
+ ESP_ERROR_CHECK(esp_lcd_new_i80_bus(&bus_config, &i80_bus));
|
|
|
+ esp_lcd_panel_io_handle_t io_handle = NULL;
|
|
|
+ esp_lcd_panel_io_i80_config_t io_config = {
|
|
|
+ .cs_gpio_num = EXAMPLE_PIN_NUM_CS,
|
|
|
+ .pclk_hz = EXAMPLE_LCD_PIXEL_CLOCK_HZ,
|
|
|
+ .trans_queue_depth = 10,
|
|
|
+ .dc_levels = {
|
|
|
+ .dc_idle_level = 0,
|
|
|
+ .dc_cmd_level = 0,
|
|
|
+ .dc_dummy_level = 0,
|
|
|
+ .dc_data_level = 1,
|
|
|
+ },
|
|
|
+ .on_color_trans_done = example_notify_lvgl_flush_ready,
|
|
|
+ .user_data = &disp_drv,
|
|
|
+ .lcd_cmd_bits = EXAMPLE_LCD_CMD_BITS,
|
|
|
+ .lcd_param_bits = EXAMPLE_LCD_PARAM_BITS,
|
|
|
+ };
|
|
|
+ ESP_ERROR_CHECK(esp_lcd_new_panel_io_i80(i80_bus, &io_config, &io_handle));
|
|
|
+
|
|
|
+ ESP_LOGI(TAG, "Install LCD driver of st7789");
|
|
|
+ esp_lcd_panel_handle_t panel_handle = NULL;
|
|
|
+ esp_lcd_panel_dev_config_t panel_config = {
|
|
|
+ .reset_gpio_num = EXAMPLE_PIN_NUM_RST,
|
|
|
+ .color_space = ESP_LCD_COLOR_SPACE_RGB,
|
|
|
+ .bits_per_pixel = 16,
|
|
|
+ };
|
|
|
+ ESP_ERROR_CHECK(esp_lcd_new_panel_st7789(io_handle, &panel_config, &panel_handle));
|
|
|
+
|
|
|
+ esp_lcd_panel_reset(panel_handle);
|
|
|
+ esp_lcd_panel_init(panel_handle);
|
|
|
+ esp_lcd_panel_invert_color(panel_handle, true);
|
|
|
+ // the gap is LCD panel specific, even panels with the same driver IC, can have different gap value
|
|
|
+ esp_lcd_panel_set_gap(panel_handle, 0, 20);
|
|
|
+
|
|
|
+ ESP_LOGI(TAG, "Turn on LCD backlight");
|
|
|
+ gpio_set_level(EXAMPLE_PIN_NUM_BK_LIGHT, EXAMPLE_LCD_BK_LIGHT_ON_LEVEL);
|
|
|
+
|
|
|
+ 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 = heap_caps_malloc(EXAMPLE_LCD_H_RES * 20 * sizeof(lv_color_t), MALLOC_CAP_DMA);
|
|
|
+ assert(buf1);
|
|
|
+ lv_color_t *buf2 = heap_caps_malloc(EXAMPLE_LCD_H_RES * 20 * sizeof(lv_color_t), MALLOC_CAP_DMA);
|
|
|
+ assert(buf2);
|
|
|
+ // initialize LVGL draw buffers
|
|
|
+ lv_disp_draw_buf_init(&disp_buf, buf1, buf2, EXAMPLE_LCD_H_RES * 20);
|
|
|
+
|
|
|
+ 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;
|
|
|
+ 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"
|
|
|
+ };
|
|
|
+ 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));
|
|
|
+
|
|
|
+ ESP_LOGI(TAG, "Display LVGL animation");
|
|
|
+ lv_obj_t *scr = lv_disp_get_scr_act(disp);
|
|
|
+ example_lvgl_demo_ui(scr);
|
|
|
+
|
|
|
+ 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();
|
|
|
+ }
|
|
|
+}
|
morris
