feat(app): 添加显示模块支持ST7789V显示屏

- 新增display_module.c实现LVGL显示功能，包括标签创建和定时刷新
- 在CMakeLists.txt中添加display_module.c到应用源文件列表
- 在app.overlay中配置显示设备选择和SPI接口使能
- 增加DISPLAY、MIPI_DBI、ST7789V、LVGL等相关配置选项
- 调整pm_static.yml中的应用分区大小以适应新的固件尺寸
- 禁用MCUBOOT和MCUMGR相关配置以节省空间

src/modules/display_module.c

@@ -0,0 +1,122 @@
+#include <stdio.h>
+
+#include <zephyr/device.h>
+#include <zephyr/devicetree.h>
+#include <zephyr/drivers/display.h>
+#include <zephyr/kernel.h>
+
+#include <app_event_manager.h>
+
+#include <lvgl.h>
+#include <lvgl_zephyr.h>
+
+#define MODULE display
+#include <caf/events/module_state_event.h>
+
+#include <zephyr/logging/log.h>
+LOG_MODULE_REGISTER(MODULE, LOG_LEVEL_INF);
+
+#define DISPLAY_UPDATE_PERIOD_MS 10
+
+struct display_ctx {
+	const struct device *dev;
+	struct k_work_delayable refresh_work;
+	lv_obj_t *hello_label;
+	lv_obj_t *count_label;
+	uint32_t tick_count;
+	bool initialized;
+};
+
+static struct display_ctx disp = {
+	.dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_display)),
+};
+
+static void display_refresh_work_fn(struct k_work *work)
+{
+	char count_str[12];
+	uint32_t wait_ms;
+
+	ARG_UNUSED(work);
+
+	if (!disp.initialized) {
+		return;
+	}
+
+	lvgl_lock();
+
+	if ((disp.tick_count % 100U) == 0U) {
+		snprintk(count_str, sizeof(count_str), "%u", disp.tick_count / 100U);
+		lv_label_set_text(disp.count_label, count_str);
+	}
+
+	wait_ms = lv_timer_handler();
+	lvgl_unlock();
+
+	disp.tick_count++;
+	k_work_reschedule(&disp.refresh_work,
+			  K_MSEC(MAX(wait_ms, DISPLAY_UPDATE_PERIOD_MS)));
+}
+
+static int display_demo_init(void)
+{
+	int err;
+
+	if (!device_is_ready(disp.dev)) {
+		LOG_ERR("Display device not ready");
+		return -ENODEV;
+	}
+
+	disp.tick_count = 0U;
+	k_work_init_delayable(&disp.refresh_work, display_refresh_work_fn);
+
+	lvgl_lock();
+	lv_obj_clean(lv_screen_active());
+
+	disp.hello_label = lv_label_create(lv_screen_active());
+	lv_label_set_text(disp.hello_label, "LVGL demo running");
+	lv_obj_align(disp.hello_label, LV_ALIGN_CENTER, 0, -12);
+
+	disp.count_label = lv_label_create(lv_screen_active());
+	lv_label_set_text(disp.count_label, "0");
+	lv_obj_align(disp.count_label, LV_ALIGN_BOTTOM_MID, 0, -12);
+
+	lv_timer_handler();
+	lvgl_unlock();
+
+	err = display_blanking_off(disp.dev);
+	if (err) {
+		LOG_ERR("Display blanking off failed: %d", err);
+		return err;
+	}
+
+	disp.initialized = true;
+	k_work_reschedule(&disp.refresh_work, K_MSEC(DISPLAY_UPDATE_PERIOD_MS));
+
+	LOG_INF("LVGL display demo initialized");
+	return 0;
+}
+
+static bool app_event_handler(const struct app_event_header *aeh)
+{
+	if (is_module_state_event(aeh)) {
+		const struct module_state_event *event = cast_module_state_event(aeh);
+
+		if (check_state(event, MODULE_ID(main), MODULE_STATE_READY)) {
+			int err = display_demo_init();
+
+			if (err) {
+				module_set_state(MODULE_STATE_ERROR);
+			} else {
+				module_set_state(MODULE_STATE_READY);
+			}
+		}
+
+		return false;
+	}
+
+	__ASSERT_NO_MSG(false);
+	return false;
+}
+
+APP_EVENT_LISTENER(MODULE, app_event_handler);
+APP_EVENT_SUBSCRIBE(MODULE, module_state_event);