add st7789

2024-11-06 10:06:05 +08:00
parent 3575448373
commit 20deb2b777
13 changed files with 250 additions and 28 deletions
--- a/main/display/st7789_display.cc
+++ b/main/display/st7789_display.cc
@@ -0,0 +1,123 @@
+#include "st7789_display.h"
+
+#include <esp_log.h>
+#include <esp_err.h>
+#include <esp_lvgl_port.h>
+#include <driver/ledc.h>
+#include <vector>
+
+#define TAG "St7789Display"
+#define LCD_LEDC_CH LEDC_CHANNEL_0
+
+St7789Display::St7789Display(esp_lcd_panel_io_handle_t panel_io, esp_lcd_panel_handle_t panel, gpio_num_t backlight_pin,
+                           int width, int height, bool mirror_x, bool mirror_y)
+    : panel_io_(panel_io), panel_(panel), mirror_x_(mirror_x), mirror_y_(mirror_y) {
+    width_ = width;
+    height_ = height;
+
+    ESP_LOGI(TAG, "Initialize LVGL");
+    lvgl_port_cfg_t port_cfg = ESP_LVGL_PORT_INIT_CONFIG();
+    lvgl_port_init(&port_cfg);
+
+    InitializeBacklight(backlight_pin);
+
+    // draw white
+    std::vector<uint16_t> buffer(width_, 0xFFFF);
+    for (int y = 0; y < height_; y++) {
+        esp_lcd_panel_draw_bitmap(panel_, 0, y, width_, y + 1, buffer.data());
+    }
+
+    // Set the display to on
+    ESP_LOGI(TAG, "Turning display on");
+    ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_, true));
+
+    ESP_LOGI(TAG, "Adding LCD screen");
+    const lvgl_port_display_cfg_t display_cfg = {
+        .io_handle = panel_io_,
+        .panel_handle = panel_,
+        .control_handle = nullptr,
+        .buffer_size = static_cast<uint32_t>(width_ * 20),
+        .double_buffer = false,
+        .trans_size = 0,
+        .hres = static_cast<uint32_t>(width_),
+        .vres = static_cast<uint32_t>(height_),
+        .monochrome = false,
+        .rotation = {
+            .swap_xy = true,
+            .mirror_x = mirror_x_,
+            .mirror_y = mirror_y_,
+        },
+        .flags = {
+            .buff_dma = 0,
+            .buff_spiram = 1,
+            .sw_rotate = 0,
+            .full_refresh = 0,
+            .direct_mode = 0,
+        },
+    };
+
+    disp_ = lvgl_port_add_disp(&display_cfg);
+
+    SetBacklight(100);
+}
+
+St7789Display::~St7789Display() {
+    if (panel_ != nullptr) {
+        esp_lcd_panel_del(panel_);
+    }
+    if (panel_io_ != nullptr) {
+        esp_lcd_panel_io_del(panel_io_);
+    }
+    lvgl_port_deinit();
+}
+
+void St7789Display::InitializeBacklight(gpio_num_t backlight_pin) {
+    if (backlight_pin == GPIO_NUM_NC) {
+        return;
+    }
+
+    // Setup LEDC peripheral for PWM backlight control
+    const ledc_channel_config_t backlight_channel = {
+        .gpio_num = backlight_pin,
+        .speed_mode = LEDC_LOW_SPEED_MODE,
+        .channel = LCD_LEDC_CH,
+        .intr_type = LEDC_INTR_DISABLE,
+        .timer_sel = LEDC_TIMER_0,
+        .duty = 0,
+        .hpoint = 0,
+        .flags = {
+            .output_invert = true
+        }
+    };
+    const ledc_timer_config_t backlight_timer = {
+        .speed_mode = LEDC_LOW_SPEED_MODE,
+        .duty_resolution = LEDC_TIMER_10_BIT,
+        .timer_num = LEDC_TIMER_0,
+        .freq_hz = 5000,
+        .clk_cfg = LEDC_AUTO_CLK,
+        .deconfigure = false
+    };
+
+    ESP_ERROR_CHECK(ledc_timer_config(&backlight_timer));
+    ESP_ERROR_CHECK(ledc_channel_config(&backlight_channel));
+}
+
+void St7789Display::SetBacklight(uint8_t brightness) {
+    if (brightness > 100) {
+        brightness = 100;
+    }
+
+    ESP_LOGI(TAG, "Setting LCD backlight: %d%%", brightness);
+    // LEDC resolution set to 10bits, thus: 100% = 1023
+    uint32_t duty_cycle = (1023 * brightness) / 100;
+    ESP_ERROR_CHECK(ledc_set_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH, duty_cycle));
+    ESP_ERROR_CHECK(ledc_update_duty(LEDC_LOW_SPEED_MODE, LCD_LEDC_CH));
+}
+
+void St7789Display::Lock() {
+    lvgl_port_lock(0);
+}
+
+void St7789Display::Unlock() {
+    lvgl_port_unlock();
+}