feat(nuttx): add lv_nuttx_run (#6371)

Co-authored-by: Neo Xu <neo.xu1990@gmail.com>

src/drivers/nuttx/lv_nuttx_entry.c

@@ -47,6 +47,10 @@ static uint32_t millis(void);
 #endif
 static void check_stack_size(void);
 
+#ifdef CONFIG_LV_USE_NUTTX_LIBUV
+    static void lv_nuttx_uv_loop(lv_nuttx_result_t * result);
+#endif
+
 /**********************
  *  STATIC VARIABLES
  **********************/
@@ -169,6 +173,22 @@ void lv_nuttx_init(const lv_nuttx_dsc_t * dsc, lv_nuttx_result_t * result)
 #endif
 }
 
+void lv_nuttx_run(lv_nuttx_result_t * result)
+{
+#ifdef CONFIG_LV_USE_NUTTX_LIBUV
+    lv_nuttx_uv_loop(&ui_loop, result);
+#else
+    while(1) {
+        uint32_t idle;
+        idle = lv_timer_handler();
+
+        /* Minimum sleep of 1ms */
+        idle = idle ? idle : 1;
+        usleep(idle * 1000);
+    }
+#endif
+}
+
 #ifdef CONFIG_SCHED_CPULOAD
 
 uint32_t lv_nuttx_get_idle(void)
@@ -246,6 +266,29 @@ static void syslog_print(lv_log_level_t level, const char * buf)
 }
 #endif
 
+#ifdef CONFIG_LV_USE_NUTTX_LIBUV
+static void lv_nuttx_uv_loop(lv_nuttx_result_t * result)
+{
+    uv_loop_t loop;
+    lv_nuttx_uv_t uv_info;
+    void * data;
+
+    uv_loop_init(&loop);
+
+    lv_memzero(&uv_info, sizeof(uv_info));
+    uv_info.loop = &loop;
+    uv_info.disp = result->disp;
+    uv_info.indev = result->indev;
+#ifdef CONFIG_UINPUT_TOUCH
+    uv_info.uindev = result->utouch_indev;
+#endif
+
+    data = lv_nuttx_uv_init(&uv_info);
+    uv_run(loop, UV_RUN_DEFAULT);
+    lv_nuttx_uv_deinit(&data);
+}
+#endif
+
 static void check_stack_size(void)
 {
     pthread_t tid = pthread_self();
@@ -259,3 +302,4 @@ static void check_stack_size(void)
 }
 
 #endif /*LV_USE_NUTTX*/
+

src/drivers/nuttx/lv_nuttx_entry.h

@@ -85,6 +85,14 @@ void lv_nuttx_init_custom(const lv_nuttx_dsc_t * dsc, lv_nuttx_result_t * result
 void lv_nuttx_deinit_custom(lv_nuttx_result_t * result);
 #endif /* LV_USE_NUTTX_CUSTOM_INIT */
 
+/**
+ * Call `lv_timer_handler()` (LVGL's super loop) in an endless loop.
+ * If LV_USE_NUTTX_LIBUV is enabled an UV timer will be created,
+ * else `lv_timer_handler()` will be called in a loop with some sleep.
+ * @param result pointer to a variable initialized by `lv_nuttx_init()` or `lv_nuttx_init_custom()`
+ */
+void lv_nuttx_run(lv_nuttx_result_t * result);
+
 /**
  * Get the idle percentage of the system.
  * @return The idle percentage of the system.