lv_task: add idle measurement

lv_misc/lv_mem.h

@@ -27,13 +27,13 @@ extern "C" {
 
 typedef struct
 {
+    uint32_t total_size;
     uint32_t free_cnt;
-    uint32_t used_cnt;
     uint32_t free_size;
-    uint32_t total_size;
     uint32_t free_biggest_size;
-    uint8_t frag_pct;
+    uint32_t used_cnt;
     uint8_t used_pct;
+    uint8_t frag_pct;
 }lv_mem_monitor_t;
 
 /**********************

lv_misc/lv_task.c

@@ -14,6 +14,7 @@
 /*********************
  *      DEFINES
  *********************/
+#define IDLE_MEAS_PERIOD    500     /*[ms]*/
 
 /**********************
  *      TYPEDEFS
@@ -55,8 +56,14 @@ void lv_task_init(void)
  */
 void lv_task_handler(void)
 {
+    static uint32_t idle_period_start = 0;
+    static uint32_t handler_start = 0;
+    static uint32_t busy_time = 0;
+
 	if(lv_task_run == false) return;
 
+	handler_start = lv_tick_get();
+
     lv_task_t* lv_task_prio_a[LV_TASK_PRIO_NUM]; /*Lists for all prio.*/
     lv_task_prio_t prio_act;
     bool prio_reset = false;  /*Used to go back to the highest priority*/
@@ -100,6 +107,19 @@ void lv_task_handler(void)
             }
         }
     }
+
+
+    busy_time += lv_tick_elaps(handler_start);
+    uint32_t idle_period_time = lv_tick_elaps(idle_period_start);
+    if(idle_period_time >= IDLE_MEAS_PERIOD) {
+
+        idle_last = (uint32_t)((uint32_t)busy_time * 100) / IDLE_MEAS_PERIOD;   /*Calculate the busy percentage*/
+        idle_last = idle_last > 100 ? 0 : 100 - idle_last;                      /*But we need idle time*/
+        busy_time = 0;
+        idle_period_start = lv_tick_get();
+
+
+    }
 }
 
 /**

lv_misc/lv_task.h

@@ -123,6 +123,12 @@ void lv_task_reset(lv_task_t* lv_task_p);
  */
 void lv_task_enable(bool en);
 
+/**
+ * Get idle percentage
+ * @return the lv_task idle in percentage
+ */
+uint8_t lv_task_get_idle(void);
+
 /**********************
  *      MACROS
  **********************/