Ken Van Hoeylandt
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GitHub
GitHub
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6d80144e12
commit
85e26636a3
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#include "config.h"
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#include "lvgl.h"
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#include "TactilityCore.h"
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#include "Thread.h"
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#include "esp_err.h"
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#include "esp_lcd_panel_ops.h"
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#include <esp_lcd_panel_rgb.h>
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#include <esp_timer.h>
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#include <sys/cdefs.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/semphr.h"
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#define TAG "waveshare_s3_touch_display"
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SemaphoreHandle_t sem_vsync_end = nullptr;
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SemaphoreHandle_t sem_gui_ready = nullptr;
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SemaphoreHandle_t lvgl_mux = nullptr;
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#if WAVESHARE_LCD_USE_DOUBLE_FB
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#define WAVESHARE_LCD_NUM_FB 2
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#else
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#define WAVESHARE_LCD_NUM_FB 1
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#endif
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static bool lvgl_is_running = false;
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bool ws3t_display_lock(uint32_t timeout_ms) {
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assert(lvgl_mux && "lvgl_port_init must be called first");
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const TickType_t timeout_ticks = (timeout_ms == 0) ? tt::TtWaitForever : pdMS_TO_TICKS(timeout_ms);
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return xSemaphoreTakeRecursive(lvgl_mux, timeout_ticks) == pdTRUE;
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}
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void ws3t_display_unlock(void) {
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assert(lvgl_mux && "lvgl_port_init must be called first");
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xSemaphoreGiveRecursive(lvgl_mux);
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}
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// Display_task should have lower priority than lvgl_tick_task below
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static int32_t display_task(TT_UNUSED void* parameter) {
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uint32_t task_delay_ms = LVGL_MAX_SLEEP;
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ESP_LOGI(TAG, "Starting LVGL task");
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lvgl_is_running = true;
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while (lvgl_is_running) {
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if (ws3t_display_lock(0)) {
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task_delay_ms = lv_timer_handler();
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ws3t_display_unlock();
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}
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if ((task_delay_ms > LVGL_MAX_SLEEP) || (1 == task_delay_ms)) {
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task_delay_ms = LVGL_MAX_SLEEP;
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} else if (task_delay_ms < 1) {
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task_delay_ms = 1;
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}
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vTaskDelay(pdMS_TO_TICKS(task_delay_ms));
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}
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vTaskDelete(nullptr);
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return 0;
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}
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static bool on_vsync_event(
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TT_UNUSED esp_lcd_panel_handle_t panel,
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TT_UNUSED const esp_lcd_rgb_panel_event_data_t* event_data,
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TT_UNUSED void* user_data
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) {
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BaseType_t high_task_awoken = pdFALSE;
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if (xSemaphoreTakeFromISR(sem_gui_ready, &high_task_awoken) == pdTRUE) {
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xSemaphoreGiveFromISR(sem_vsync_end, &high_task_awoken);
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}
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return high_task_awoken == pdTRUE;
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}
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static void lvgl_tick_task(TT_UNUSED void* arg) {
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// Tell how much time has passed
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lv_tick_inc(WAVESHARE_LVGL_TICK_PERIOD_MS);
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}
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static void display_flush_callback(lv_display_t* disp, const lv_area_t* area, uint8_t* px_map) {
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auto panel_handle = static_cast<esp_lcd_panel_handle_t>(lv_display_get_user_data(disp));
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int offsetx1 = area->x1;
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int offsetx2 = area->x2;
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int offsety1 = area->y1;
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int offsety2 = area->y2;
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xSemaphoreGive(sem_gui_ready);
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xSemaphoreTake(sem_vsync_end, portMAX_DELAY);
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// pass the draw buffer to the driver
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esp_lcd_panel_draw_bitmap(panel_handle, offsetx1, offsety1, offsetx2 + 1, offsety2 + 1, px_map);
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lv_disp_flush_ready(disp);
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}
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lv_disp_t* ws3t_display_create() {
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TT_LOG_I(TAG, "display init");
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sem_vsync_end = xSemaphoreCreateBinary();
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tt_assert(sem_vsync_end);
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sem_gui_ready = xSemaphoreCreateBinary();
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tt_assert(sem_gui_ready);
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lvgl_mux = xSemaphoreCreateRecursiveMutex();
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tt_assert(lvgl_mux);
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tt::Thread* thread = tt::thread_alloc_ex("display_task", 8192, &display_task, nullptr);
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tt::thread_set_priority(thread, tt::ThreadPriorityHigh); // TODO: try out THREAD_PRIORITY_RENDER
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tt::thread_start(thread);
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esp_lcd_panel_handle_t panel_handle = NULL;
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esp_lcd_rgb_panel_config_t panel_config = {
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.clk_src = LCD_CLK_SRC_DEFAULT,
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.timings = {
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.pclk_hz = WAVESHARE_LCD_PIXEL_CLOCK_HZ,
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.h_res = WAVESHARE_LCD_HOR_RES,
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.v_res = WAVESHARE_LCD_VER_RES,
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.hsync_pulse_width = 10,
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// The following parameters should refer to LCD spec
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.hsync_back_porch = 10,
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.hsync_front_porch = 20,
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.vsync_pulse_width = 10,
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.vsync_back_porch = 10,
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.vsync_front_porch = 10,
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},
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.data_width = 16, // RGB565 in parallel mode, thus 16bit in width
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.bits_per_pixel = 16,
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.num_fbs = WAVESHARE_LCD_NUM_FB,
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.bounce_buffer_size_px = 0,
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.sram_trans_align = 0,
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.psram_trans_align = 64,
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.hsync_gpio_num = WAVESHARE_LCD_PIN_NUM_HSYNC,
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.vsync_gpio_num = WAVESHARE_LCD_PIN_NUM_VSYNC,
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.de_gpio_num = WAVESHARE_LCD_PIN_NUM_DE,
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.pclk_gpio_num = WAVESHARE_LCD_PIN_NUM_PCLK,
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.disp_gpio_num = WAVESHARE_LCD_PIN_NUM_DISP_EN,
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.data_gpio_nums = {WAVESHARE_LCD_PIN_NUM_DATA0, WAVESHARE_LCD_PIN_NUM_DATA1, WAVESHARE_LCD_PIN_NUM_DATA2, WAVESHARE_LCD_PIN_NUM_DATA3, WAVESHARE_LCD_PIN_NUM_DATA4, WAVESHARE_LCD_PIN_NUM_DATA5, WAVESHARE_LCD_PIN_NUM_DATA6, WAVESHARE_LCD_PIN_NUM_DATA7, WAVESHARE_LCD_PIN_NUM_DATA8, WAVESHARE_LCD_PIN_NUM_DATA9, WAVESHARE_LCD_PIN_NUM_DATA10, WAVESHARE_LCD_PIN_NUM_DATA11, WAVESHARE_LCD_PIN_NUM_DATA12, WAVESHARE_LCD_PIN_NUM_DATA13, WAVESHARE_LCD_PIN_NUM_DATA14, WAVESHARE_LCD_PIN_NUM_DATA15},
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.flags = {.disp_active_low = false, .refresh_on_demand = false, .fb_in_psram = true, .double_fb = WAVESHARE_LCD_USE_DOUBLE_FB, .no_fb = false, .bb_invalidate_cache = false}
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};
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if (esp_lcd_new_rgb_panel(&panel_config, &panel_handle) != ESP_OK) {
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TT_LOG_E(TAG, "Failed to create RGB panel");
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return nullptr;
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}
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esp_lcd_rgb_panel_event_callbacks_t cbs = {
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.on_vsync = on_vsync_event,
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.on_bounce_empty = nullptr,
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.on_bounce_frame_finish = nullptr
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};
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if (esp_lcd_rgb_panel_register_event_callbacks(panel_handle, &cbs, nullptr) != ESP_OK) {
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TT_LOG_E(TAG, "Failed to register callbacks");
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return nullptr;
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}
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if (esp_lcd_panel_reset(panel_handle) != ESP_OK) {
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TT_LOG_E(TAG, "Failed to reset panel");
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return nullptr;
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}
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if (esp_lcd_panel_init(panel_handle) != ESP_OK) {
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TT_LOG_E(TAG, "Failed to init panel");
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return nullptr;
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}
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lv_init();
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#if WAVESHARE_LCD_USE_DOUBLE_FB
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// initialize LVGL draw buffers
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lv_draw_buf_t* buffer1 = lv_draw_buf_create(WAVESHARE_LCD_HOR_RES, WAVESHARE_LCD_BUFFER_HEIGHT, LV_COLOR_FORMAT_RGB565, 0);
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lv_draw_buf_t* buffer2 = lv_draw_buf_create(WAVESHARE_LCD_HOR_RES, WAVESHARE_LCD_BUFFER_HEIGHT, LV_COLOR_FORMAT_RGB565, 0);
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tt_assert(buffer1);
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tt_assert(buffer2);
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#else
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lv_draw_buf_t* buffer1 = lv_draw_buf_create(WAVESHARE_LCD_HOR_RES, WAVESHARE_LCD_VER_RES, LV_COLOR_FORMAT_RGB565, 0);
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lv_draw_buf_t* buffer2 = NULL;
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tt_assert(buffer1);
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#endif // WAVESHARE_USE_DOUBLE_FB
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lv_display_t* display = lv_display_create(WAVESHARE_LCD_HOR_RES, WAVESHARE_LCD_VER_RES);
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lv_display_set_draw_buffers(display, buffer1, buffer2);
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lv_display_set_flush_cb(display, &display_flush_callback);
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lv_display_set_user_data(display, panel_handle);
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lv_display_set_antialiasing(display, false);
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lv_display_set_render_mode(display, LV_DISPLAY_RENDER_MODE_PARTIAL);
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const esp_timer_create_args_t lvgl_tick_timer_args = {
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.callback = &lvgl_tick_task,
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.name = "lvgl_tick"
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};
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esp_timer_handle_t lvgl_tick_timer = nullptr;
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ESP_ERROR_CHECK(esp_timer_create(&lvgl_tick_timer_args, &lvgl_tick_timer));
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ESP_ERROR_CHECK(esp_timer_start_periodic(lvgl_tick_timer, WAVESHARE_LVGL_TICK_PERIOD_MS * 1000));
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return display;
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}
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void ws3t_display_destroy() {
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// TODO: de-init display, its buffer and touch, stop display tasks, stop timer
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// TODO: see esp_lvlg_port.c for more info
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if (lvgl_mux) {
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vSemaphoreDelete(lvgl_mux);
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lvgl_mux = nullptr;
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}
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#if LV_ENABLE_GC || !LV_MEM_CUSTOM
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lv_deinit();
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#endif
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}
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