diff --git a/lvgl.h b/lvgl.h
index 7b6591904..63c6211fd 100644
--- a/lvgl.h
+++ b/lvgl.h
@@ -25,15 +25,16 @@ extern "C" {
 #include "src/misc/lv_log.h"
 #include "src/misc/lv_timer.h"
 #include "src/misc/lv_math.h"
+#include "src/misc/lv_mem.h"
 #include "src/misc/lv_async.h"
 #include "src/misc/lv_anim_timeline.h"
+#include "src/misc/lv_printf.h"
 
 #include "src/hal/lv_hal.h"
 
 #include "src/core/lv_obj.h"
 #include "src/core/lv_group.h"
 #include "src/core/lv_indev.h"
-
 #include "src/core/lv_refr.h"
 #include "src/core/lv_disp.h"
 #include "src/core/lv_theme.h"
@@ -41,7 +42,6 @@ extern "C" {
 #include "src/font/lv_font.h"
 #include "src/font/lv_font_loader.h"
 #include "src/font/lv_font_fmt_txt.h"
-#include "src/misc/lv_printf.h"
 
 #include "src/widgets/lv_arc.h"
 #include "src/widgets/lv_btn.h"
diff --git a/src/misc/lv_anim.c b/src/misc/lv_anim.c
index e6b43b130..ecb95840d 100644
--- a/src/misc/lv_anim.c
+++ b/src/misc/lv_anim.c
@@ -8,10 +8,8 @@
  *********************/
 #include "lv_anim.h"
 
-#include <stddef.h>
-#include <string.h>
-#include "../misc/lv_assert.h"
 #include "../hal/lv_hal_tick.h"
+#include "lv_assert.h"
 #include "lv_timer.h"
 #include "lv_math.h"
 #include "lv_mem.h"
@@ -67,9 +65,9 @@ void _lv_anim_core_init(void)
 void lv_anim_init(lv_anim_t * a)
 {
     lv_memset_00(a, sizeof(lv_anim_t));
-    a->time    = 500;
-    a->start_value   = 0;
-    a->end_value     = 100;
+    a->time = 500;
+    a->start_value = 0;
+    a->end_value = 100;
     a->repeat_cnt = 1;
     a->path_cb = lv_anim_path_linear;
     a->early_apply = 1;
@@ -100,7 +98,7 @@ lv_anim_t * lv_anim_start(const lv_anim_t * a)
     /*Set the start value*/
     if(new_anim->early_apply) {
         if(new_anim->get_value_cb) {
-            int32_t v_ofs  = new_anim->get_value_cb(new_anim);
+            int32_t v_ofs = new_anim->get_value_cb(new_anim);
             new_anim->start_value += v_ofs;
             new_anim->end_value += v_ofs;
         }
@@ -151,7 +149,7 @@ bool lv_anim_del(void * var, lv_anim_exec_xcb_t exec_cb)
             _lv_ll_remove(&LV_GC_ROOT(_lv_anim_ll), a);
             lv_mem_free(a);
             anim_mark_list_change(); /*Read by `anim_timer`. It need to know if a delete occurred in
-                                         the linked list*/
+                                       the linked list*/
             del = true;
         }
 
@@ -345,7 +343,7 @@ int32_t lv_anim_path_step(const lv_anim_t * a)
  */
 static void anim_timer(lv_timer_t * param)
 {
-    (void)param;
+    LV_UNUSED(param);
 
     uint32_t elaps = lv_tick_elaps(last_timer_run);
 
@@ -368,7 +366,7 @@ static void anim_timer(lv_timer_t * param)
             int32_t new_act_time = a->act_time + elaps;
             if(!a->start_cb_called && a->act_time <= 0 && new_act_time >= 0) {
                 if(a->early_apply == 0 && a->get_value_cb) {
-                    int32_t v_ofs  = a->get_value_cb(a);
+                    int32_t v_ofs = a->get_value_cb(a);
                     a->start_value += v_ofs;
                     a->end_value += v_ofs;
                 }
@@ -444,8 +442,7 @@ static void anim_ready_handler(lv_anim_t * a)
             /*Toggle the play back state*/
             a->playback_now = a->playback_now == 0 ? 1 : 0;
             /*Swap the start and end values*/
-            int32_t tmp;
-            tmp      = a->start_value;
+            int32_t tmp    = a->start_value;
             a->start_value = a->end_value;
             a->end_value   = tmp;
             /*Swap the time and playback_time*/
@@ -455,6 +452,7 @@ static void anim_ready_handler(lv_anim_t * a)
         }
     }
 }
+
 static void anim_mark_list_change(void)
 {
     anim_list_changed = true;
diff --git a/src/misc/lv_anim.h b/src/misc/lv_anim.h
index 2b7307dbf..6f51bf001 100644
--- a/src/misc/lv_anim.h
+++ b/src/misc/lv_anim.h
@@ -17,7 +17,7 @@ extern "C" {
 
 #include <stdint.h>
 #include <stdbool.h>
-#include <string.h>
+#include <stddef.h>
 
 /*********************
  *      DEFINES
@@ -173,7 +173,7 @@ static inline void lv_anim_set_values(lv_anim_t * a, int32_t start, int32_t end)
  * `lv_anim_t * ` as its first parameter instead of `void *`.
  * This function might be used when LVGL is bound to other languages because
  * it's more consistent to have `lv_anim_t *` as first parameter.
- * The variable to animate can be stored in the animation's `user_sata`
+ * The variable to animate can be stored in the animation's `user_data`
  * @param a         pointer to an initialized `lv_anim_t` variable
  * @param exec_cb   a function to execute.
  */
@@ -223,10 +223,11 @@ static inline void lv_anim_set_ready_cb(lv_anim_t * a, lv_anim_ready_cb_t ready_
 {
     a->ready_cb = ready_cb;
 }
+
 /**
  * Make the animation to play back to when the forward direction is ready
  * @param a         pointer to an initialized `lv_anim_t` variable
- * @param time      the duration of the playback animation in in milliseconds. 0: disable playback
+ * @param time      the duration of the playback animation in milliseconds. 0: disable playback
  */
 static inline void lv_anim_set_playback_time(lv_anim_t * a, uint32_t time)
 {
diff --git a/src/misc/lv_anim_timeline.c b/src/misc/lv_anim_timeline.c
index cc7462006..930b6952c 100644
--- a/src/misc/lv_anim_timeline.c
+++ b/src/misc/lv_anim_timeline.c
@@ -8,7 +8,7 @@
  *********************/
 #include "lv_anim_timeline.h"
 #include "lv_mem.h"
-#include "../misc/lv_assert.h"
+#include "lv_assert.h"
 
 /*********************
  *      DEFINES
diff --git a/src/misc/lv_area.c b/src/misc/lv_area.c
index 4b6a6d65c..08a8f16e1 100644
--- a/src/misc/lv_area.c
+++ b/src/misc/lv_area.c
@@ -142,6 +142,7 @@ bool _lv_area_intersect(lv_area_t * res_p, const lv_area_t * a1_p, const lv_area
 
     return union_ok;
 }
+
 /**
  * Join two areas into a third which involves the other two
  * @param res_p pointer to an area, the result will be stored here
diff --git a/src/misc/lv_area.h b/src/misc/lv_area.h
index d2cb7437a..e2a70eb4c 100644
--- a/src/misc/lv_area.h
+++ b/src/misc/lv_area.h
@@ -14,7 +14,6 @@ extern "C" {
  *      INCLUDES
  *********************/
 #include "../lv_conf_internal.h"
-#include <string.h>
 #include <stdbool.h>
 #include <stdint.h>
 
diff --git a/src/misc/lv_assert.h b/src/misc/lv_assert.h
index 4e74690f1..d1fbb8c5d 100644
--- a/src/misc/lv_assert.h
+++ b/src/misc/lv_assert.h
@@ -16,6 +16,7 @@ extern "C" {
 #include "../lv_conf_internal.h"
 #include "lv_log.h"
 #include "lv_mem.h"
+#include <stdbool.h>
 #include LV_ASSERT_HANDLER_INCLUDE
 
 /*********************
@@ -34,21 +35,21 @@ extern "C" {
  *      MACROS
  **********************/
 
-#define LV_ASSERT(expr)              \
-    do {                             \
-        if(!(expr)) {                \
-            LV_LOG_ERROR("Asserted at expression: %s", #expr);     \
-            LV_ASSERT_HANDLER        \
-        }                            \
-    } while(0)
+#define LV_ASSERT(expr)                                        \
+    do {                                                       \
+        if(!(expr)) {                                          \
+            LV_LOG_ERROR("Asserted at expression: %s", #expr); \
+            LV_ASSERT_HANDLER                                  \
+        }                                                      \
+    } while (0)
 
-#define LV_ASSERT_MSG(expr, msg)                     \
-    do {                                             \
-        if(!(expr)) {                                \
-            LV_LOG_ERROR("Asserted at expression: %s (%s)", #expr, msg);     \
-            LV_ASSERT_HANDLER                        \
-        }                                            \
-    } while(0)
+#define LV_ASSERT_MSG(expr, msg)                                         \
+    do {                                                                 \
+        if(!(expr)) {                                                    \
+            LV_LOG_ERROR("Asserted at expression: %s (%s)", #expr, msg); \
+            LV_ASSERT_HANDLER                                            \
+        }                                                                \
+    } while (0)
 
 /*-----------------
  * ASSERTS
diff --git a/src/misc/lv_async.c b/src/misc/lv_async.c
index 0a98c30e9..45a043154 100644
--- a/src/misc/lv_async.c
+++ b/src/misc/lv_async.c
@@ -8,6 +8,8 @@
  *********************/
 
 #include "lv_async.h"
+#include "lv_mem.h"
+#include "lv_timer.h"
 
 /*********************
  *      DEFINES
@@ -72,6 +74,5 @@ static void lv_async_timer_cb(lv_timer_t * timer)
     lv_async_info_t * info = (lv_async_info_t *)timer->user_data;
 
     info->cb(info->user_data);
-
     lv_mem_free(info);
 }
diff --git a/src/misc/lv_async.h b/src/misc/lv_async.h
index fc8dee05b..3e6cb638d 100644
--- a/src/misc/lv_async.h
+++ b/src/misc/lv_async.h
@@ -14,7 +14,6 @@ extern "C" {
  *      INCLUDES
  *********************/
 
-#include "lv_timer.h"
 #include "lv_types.h"
 
 /*********************
diff --git a/src/misc/lv_color.c b/src/misc/lv_color.c
index 5be799997..0e26624fb 100644
--- a/src/misc/lv_color.c
+++ b/src/misc/lv_color.c
@@ -36,7 +36,7 @@
 LV_ATTRIBUTE_FAST_MEM void lv_color_fill(lv_color_t * buf, lv_color_t color, uint32_t px_num)
 {
 #if LV_COLOR_DEPTH == 16
-    uintptr_t buf_int = (uintptr_t) buf;
+    uintptr_t buf_int = (uintptr_t)buf;
     if(buf_int & 0x3) {
         *buf = color;
         buf++;
@@ -73,7 +73,7 @@ LV_ATTRIBUTE_FAST_MEM void lv_color_fill(lv_color_t * buf, lv_color_t color, uin
     while(px_num) {
         *buf = color;
         buf++;
-        px_num --;
+        px_num--;
     }
 #else
     while(px_num > 16) {
@@ -118,7 +118,7 @@ LV_ATTRIBUTE_FAST_MEM void lv_color_fill(lv_color_t * buf, lv_color_t color, uin
     while(px_num) {
         *buf = color;
         buf++;
-        px_num --;
+        px_num--;
     }
 #endif
 }
@@ -367,5 +367,3 @@ lv_color_t lv_palette_darken(lv_palette_t p, uint8_t lvl)
 
     return colors[p][lvl];
 }
-
-
diff --git a/src/misc/lv_color.h b/src/misc/lv_color.h
index 20e735088..a0178bedb 100644
--- a/src/misc/lv_color.h
+++ b/src/misc/lv_color.h
@@ -471,11 +471,11 @@ LV_ATTRIBUTE_FAST_MEM static inline lv_color_t lv_color_mix(lv_color_t c1, lv_co
     ret.full = (uint16_t)((result >> 16) | result);
 #elif LV_COLOR_DEPTH != 1
     /*LV_COLOR_DEPTH == 8, 16 or 32*/
-    LV_COLOR_SET_R(ret, LV_UDIV255((uint16_t) LV_COLOR_GET_R(c1) * mix + LV_COLOR_GET_R(c2) *
+    LV_COLOR_SET_R(ret, LV_UDIV255((uint16_t)LV_COLOR_GET_R(c1) * mix + LV_COLOR_GET_R(c2) *
                                    (255 - mix) + LV_COLOR_MIX_ROUND_OFS));
-    LV_COLOR_SET_G(ret, LV_UDIV255((uint16_t) LV_COLOR_GET_G(c1) * mix + LV_COLOR_GET_G(c2) *
+    LV_COLOR_SET_G(ret, LV_UDIV255((uint16_t)LV_COLOR_GET_G(c1) * mix + LV_COLOR_GET_G(c2) *
                                    (255 - mix) + LV_COLOR_MIX_ROUND_OFS));
-    LV_COLOR_SET_B(ret, LV_UDIV255((uint16_t) LV_COLOR_GET_B(c1) * mix + LV_COLOR_GET_B(c2) *
+    LV_COLOR_SET_B(ret, LV_UDIV255((uint16_t)LV_COLOR_GET_B(c1) * mix + LV_COLOR_GET_B(c2) *
                                    (255 - mix) + LV_COLOR_MIX_ROUND_OFS));
     LV_COLOR_SET_A(ret, 0xFF);
 #else
@@ -489,9 +489,9 @@ LV_ATTRIBUTE_FAST_MEM static inline lv_color_t lv_color_mix(lv_color_t c1, lv_co
 LV_ATTRIBUTE_FAST_MEM static inline void lv_color_premult(lv_color_t c, uint8_t mix, uint16_t * out)
 {
 #if LV_COLOR_DEPTH != 1
-    out[0] = (uint16_t) LV_COLOR_GET_R(c) * mix;
-    out[1] = (uint16_t) LV_COLOR_GET_G(c) * mix;
-    out[2] = (uint16_t) LV_COLOR_GET_B(c) * mix;
+    out[0] = (uint16_t)LV_COLOR_GET_R(c) * mix;
+    out[1] = (uint16_t)LV_COLOR_GET_G(c) * mix;
+    out[2] = (uint16_t)LV_COLOR_GET_B(c) * mix;
 #else
     (void) mix;
     /*Pre-multiplication can't be used with 1 bpp*/
diff --git a/src/misc/lv_fs.c b/src/misc/lv_fs.c
index 652889127..8011b4cf4 100644
--- a/src/misc/lv_fs.c
+++ b/src/misc/lv_fs.c
@@ -8,9 +8,9 @@
  *********************/
 #include "lv_fs.h"
 
-#include "../misc/lv_assert.h"
-#include "lv_ll.h"
 #include <string.h>
+#include "lv_assert.h"
+#include "lv_ll.h"
 #include "lv_gc.h"
 
 /*********************
@@ -163,26 +163,22 @@ lv_fs_res_t lv_fs_seek(lv_fs_file_t * file_p, uint32_t pos, lv_fs_whence_t whenc
         return LV_FS_RES_NOT_IMP;
     }
 
-    lv_fs_res_t res = file_p->drv->seek_cb(file_p->drv, file_p->file_d, pos, whence);
-
-    return res;
+    return file_p->drv->seek_cb(file_p->drv, file_p->file_d, pos, whence);
 }
 
 lv_fs_res_t lv_fs_tell(lv_fs_file_t * file_p, uint32_t * pos)
 {
+    *pos = 0;
+
     if(file_p->drv == NULL) {
-        *pos = 0;
         return LV_FS_RES_INV_PARAM;
     }
 
     if(file_p->drv->tell_cb == NULL) {
-        *pos = 0;
         return LV_FS_RES_NOT_IMP;
     }
 
-    lv_fs_res_t res = file_p->drv->tell_cb(file_p->drv, file_p->file_d, pos);
-
-    return res;
+    return file_p->drv->tell_cb(file_p->drv, file_p->file_d, pos);
 }
 
 lv_fs_res_t lv_fs_dir_open(lv_fs_dir_t * rddir_p, const char * path)
@@ -221,19 +217,17 @@ lv_fs_res_t lv_fs_dir_open(lv_fs_dir_t * rddir_p, const char * path)
 
 lv_fs_res_t lv_fs_dir_read(lv_fs_dir_t * rddir_p, char * fn)
 {
+    fn[0] = '\0';
+
     if(rddir_p->drv == NULL || rddir_p->dir_d == NULL) {
-        fn[0] = '\0';
         return LV_FS_RES_INV_PARAM;
     }
 
     if(rddir_p->drv->dir_read_cb == NULL) {
-        fn[0] = '\0';
         return LV_FS_RES_NOT_IMP;
     }
 
-    lv_fs_res_t res = rddir_p->drv->dir_read_cb(rddir_p->drv, rddir_p->dir_d, fn);
-
-    return res;
+    return rddir_p->drv->dir_read_cb(rddir_p->drv, rddir_p->dir_d, fn);
 }
 
 lv_fs_res_t lv_fs_dir_close(lv_fs_dir_t * rddir_p)
@@ -362,6 +356,7 @@ const char * lv_fs_get_last(const char * path)
 
     return &path[i];
 }
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/
diff --git a/src/misc/lv_gc.c b/src/misc/lv_gc.c
index ca163fee0..95bb5499a 100644
--- a/src/misc/lv_gc.c
+++ b/src/misc/lv_gc.c
@@ -6,9 +6,7 @@
 /*********************
  *      INCLUDES
  *********************/
-
 #include "lv_gc.h"
-#include "string.h"
 
 /*********************
  *      DEFINES
diff --git a/src/misc/lv_gc.h b/src/misc/lv_gc.h
index a5f7a19fd..dac62be26 100644
--- a/src/misc/lv_gc.h
+++ b/src/misc/lv_gc.h
@@ -13,11 +13,12 @@ extern "C" {
 /*********************
  *      INCLUDES
  *********************/
+#include "../lv_conf_internal.h"
 #include <stdint.h>
-#include <stdbool.h>
 #include "lv_mem.h"
 #include "lv_ll.h"
 #include "lv_timer.h"
+#include "lv_types.h"
 #include "../draw/lv_img_cache.h"
 #include "../draw/lv_draw_mask.h"
 #include "../core/lv_obj_pos.h"
@@ -39,23 +40,23 @@ extern "C" {
 #define LV_DISPATCH10(f, t, n)
 #define LV_DISPATCH11(f, t, n)          LV_DISPATCH(f, t, n)
 
-#define LV_ITERATE_ROOTS(f)                                                                 \
-    LV_DISPATCH(f, lv_ll_t, _lv_timer_ll) /*Linked list to store the lv_timers*/            \
-    LV_DISPATCH(f, lv_ll_t, _lv_disp_ll)  /*Linked list of display device*/                 \
-    LV_DISPATCH(f, lv_ll_t, _lv_indev_ll) /*Linked list of input device*/                   \
-    LV_DISPATCH(f, lv_ll_t, _lv_fsdrv_ll)                                                   \
-    LV_DISPATCH(f, lv_ll_t, _lv_anim_ll)                                                    \
-    LV_DISPATCH(f, lv_ll_t, _lv_group_ll)                                                   \
-    LV_DISPATCH(f, lv_ll_t, _lv_img_decoder_ll)                                             \
-    LV_DISPATCH(f, lv_ll_t, _lv_obj_style_trans_ll)                                         \
-    LV_DISPATCH(f, lv_layout_dsc_t *, _lv_layout_list)      \
-    LV_DISPATCH_COND(f, _lv_img_cache_entry_t*, _lv_img_cache_array, LV_IMG_CACHE_DEF, 1)    \
-    LV_DISPATCH_COND(f, _lv_img_cache_entry_t, _lv_img_cache_single, LV_IMG_CACHE_DEF, 0)    \
-    LV_DISPATCH(f, lv_timer_t*, _lv_timer_act)                                              \
-    LV_DISPATCH(f, lv_mem_buf_arr_t , lv_mem_buf)                                           \
+#define LV_ITERATE_ROOTS(f)                                                                            \
+    LV_DISPATCH(f, lv_ll_t, _lv_timer_ll) /*Linked list to store the lv_timers*/                       \
+    LV_DISPATCH(f, lv_ll_t, _lv_disp_ll)  /*Linked list of display device*/                            \
+    LV_DISPATCH(f, lv_ll_t, _lv_indev_ll) /*Linked list of input device*/                              \
+    LV_DISPATCH(f, lv_ll_t, _lv_fsdrv_ll)                                                              \
+    LV_DISPATCH(f, lv_ll_t, _lv_anim_ll)                                                               \
+    LV_DISPATCH(f, lv_ll_t, _lv_group_ll)                                                              \
+    LV_DISPATCH(f, lv_ll_t, _lv_img_decoder_ll)                                                        \
+    LV_DISPATCH(f, lv_ll_t, _lv_obj_style_trans_ll)                                                    \
+    LV_DISPATCH(f, lv_layout_dsc_t *, _lv_layout_list)                                                 \
+    LV_DISPATCH_COND(f, _lv_img_cache_entry_t*, _lv_img_cache_array, LV_IMG_CACHE_DEF, 1)              \
+    LV_DISPATCH_COND(f, _lv_img_cache_entry_t, _lv_img_cache_single, LV_IMG_CACHE_DEF, 0)              \
+    LV_DISPATCH(f, lv_timer_t*, _lv_timer_act)                                                         \
+    LV_DISPATCH(f, lv_mem_buf_arr_t , lv_mem_buf)                                                      \
     LV_DISPATCH_COND(f, _lv_draw_mask_radius_circle_dsc_arr_t , _lv_circle_cache, LV_DRAW_COMPLEX, 1)  \
-    LV_DISPATCH_COND(f, _lv_draw_mask_saved_arr_t , _lv_draw_mask_list, LV_DRAW_COMPLEX, 1) \
-    LV_DISPATCH(f, void * , _lv_theme_default_styles)                                       \
+    LV_DISPATCH_COND(f, _lv_draw_mask_saved_arr_t , _lv_draw_mask_list, LV_DRAW_COMPLEX, 1)            \
+    LV_DISPATCH(f, void * , _lv_theme_default_styles)                                                  \
     LV_DISPATCH_COND(f, uint8_t *, _lv_font_decompr_buf, LV_USE_FONT_COMPRESSED, 1)
 
 #define LV_DEFINE_ROOT(root_type, root_name) root_type root_name;
diff --git a/src/misc/lv_ll.c b/src/misc/lv_ll.c
index 30fb329a6..c84647ccf 100644
--- a/src/misc/lv_ll.c
+++ b/src/misc/lv_ll.c
@@ -7,9 +7,6 @@
 /*********************
  *      INCLUDES
  *********************/
-#include <stdint.h>
-#include <string.h>
-
 #include "lv_ll.h"
 #include "lv_mem.h"
 
@@ -44,7 +41,7 @@ static void node_set_next(lv_ll_t * ll_p, lv_ll_node_t * act, lv_ll_node_t * nex
 
 /**
  * Initialize linked list
- * @param ll_dsc pointer to ll_dsc variable
+ * @param ll_p pointer to lv_ll_t variable
  * @param node_size the size of 1 node in bytes
  */
 void _lv_ll_init(lv_ll_t * ll_p, uint32_t node_size)
@@ -94,7 +91,7 @@ void * _lv_ll_ins_head(lv_ll_t * ll_p)
  * Insert a new node in front of the n_act node
  * @param ll_p pointer to linked list
  * @param n_act pointer a node
- * @return pointer to the new head
+ * @return pointer to the new node
  */
 void * _lv_ll_ins_prev(lv_ll_t * ll_p, void * n_act)
 {
@@ -215,7 +212,7 @@ void _lv_ll_clear(lv_ll_t * ll_p)
  * @param ll_new_p pointer to the new linked list
  * @param node pointer to a node
  * @param head true: be the head in the new list
- *             false be the head in the new list
+ *             false be the tail in the new list
  */
 void _lv_ll_chg_list(lv_ll_t * ll_ori_p, lv_ll_t * ll_new_p, void * node, bool head)
 {
@@ -265,7 +262,7 @@ void * _lv_ll_get_head(const lv_ll_t * ll_p)
 /**
  * Return with tail node of the linked list
  * @param ll_p pointer to linked list
- * @return pointer to the head of 'll_p'
+ * @return pointer to the tail of 'll_p'
  */
 void * _lv_ll_get_tail(const lv_ll_t * ll_p)
 {
diff --git a/src/misc/lv_ll.h b/src/misc/lv_ll.h
index f5ce966a6..d38f69285 100644
--- a/src/misc/lv_ll.h
+++ b/src/misc/lv_ll.h
@@ -41,7 +41,7 @@ typedef struct {
 
 /**
  * Initialize linked list
- * @param ll_dsc pointer to ll_dsc variable
+ * @param ll_p pointer to lv_ll_t variable
  * @param node_size the size of 1 node in bytes
  */
 void _lv_ll_init(lv_ll_t * ll_p, uint32_t node_size);
@@ -57,7 +57,7 @@ void * _lv_ll_ins_head(lv_ll_t * ll_p);
  * Insert a new node in front of the n_act node
  * @param ll_p pointer to linked list
  * @param n_act pointer a node
- * @return pointer to the new head
+ * @return pointer to the new node
  */
 void * _lv_ll_ins_prev(lv_ll_t * ll_p, void * n_act);
 
@@ -88,7 +88,7 @@ void _lv_ll_clear(lv_ll_t * ll_p);
  * @param ll_new_p pointer to the new linked list
  * @param node pointer to a node
  * @param head true: be the head in the new list
- *             false be the head in the new list
+ *             false be the tail in the new list
  */
 void _lv_ll_chg_list(lv_ll_t * ll_ori_p, lv_ll_t * ll_new_p, void * node, bool head);
 
@@ -102,7 +102,7 @@ void * _lv_ll_get_head(const lv_ll_t * ll_p);
 /**
  * Return with tail node of the linked list
  * @param ll_p pointer to linked list
- * @return pointer to the head of 'll_p'
+ * @return pointer to the tail of 'll_p'
  */
 void * _lv_ll_get_tail(const lv_ll_t * ll_p);
 
diff --git a/src/misc/lv_math.c b/src/misc/lv_math.c
index fc107b138..2144a50ca 100644
--- a/src/misc/lv_math.c
+++ b/src/misc/lv_math.c
@@ -7,7 +7,6 @@
  *      INCLUDES
  *********************/
 #include "lv_math.h"
-#include <stdbool.h>
 
 /*********************
  *      DEFINES
diff --git a/src/misc/lv_math.h b/src/misc/lv_math.h
index a52391db4..4b2860a90 100644
--- a/src/misc/lv_math.h
+++ b/src/misc/lv_math.h
@@ -105,7 +105,7 @@ int64_t lv_pow(int64_t base, int8_t exp);
  * @param max_out max output range
  * @return the mapped number
  */
-int32_t lv_map(int32_t x, int32_t min_in, int32_t max_in, int32_t min, int32_t max);
+int32_t lv_map(int32_t x, int32_t min_in, int32_t max_in, int32_t min_out, int32_t max_out);
 
 /**
  * Get a pseudo random number in the given range
@@ -131,10 +131,10 @@ uint32_t lv_rand(uint32_t min, uint32_t max);
 #define LV_ABS(x) ((x) > 0 ? (x) : (-(x)))
 #define LV_UDIV255(x) (((x) * 0x8081U) >> 0x17)
 
-#define LV_IS_SIGNED(t) (((t)(-1)) < ((t) 0))
+#define LV_IS_SIGNED(t) (((t)(-1)) < ((t)0))
 #define LV_UMAX_OF(t) (((0x1ULL << ((sizeof(t) * 8ULL) - 1ULL)) - 1ULL) | (0xFULL << ((sizeof(t) * 8ULL) - 4ULL)))
 #define LV_SMAX_OF(t) (((0x1ULL << ((sizeof(t) * 8ULL) - 1ULL)) - 1ULL) | (0x7ULL << ((sizeof(t) * 8ULL) - 4ULL)))
-#define LV_MAX_OF(t) ((unsigned long) (LV_IS_SIGNED(t) ? LV_SMAX_OF(t) : LV_UMAX_OF(t)))
+#define LV_MAX_OF(t) ((unsigned long)(LV_IS_SIGNED(t) ? LV_SMAX_OF(t) : LV_UMAX_OF(t)))
 
 #ifdef __cplusplus
 } /*extern "C"*/
diff --git a/src/misc/lv_mem.c b/src/misc/lv_mem.c
index 219915f9a..91d50678b 100644
--- a/src/misc/lv_mem.c
+++ b/src/misc/lv_mem.c
@@ -11,7 +11,7 @@
 #include "lv_tlsf.h"
 #include "lv_gc.h"
 #include "lv_assert.h"
-#include <string.h>
+#include "lv_log.h"
 
 #if LV_MEM_CUSTOM != 0
     #include LV_MEM_CUSTOM_INCLUDE
@@ -134,10 +134,6 @@ void * lv_mem_alloc(size_t size)
     void * alloc = LV_MEM_CUSTOM_ALLOC(size);
 #endif
 
-#if LV_MEM_ADD_JUNK
-    if(alloc != NULL) lv_memset(alloc, 0xaa, size);
-#endif
-
     if(alloc == NULL) {
         LV_LOG_ERROR("couldn't allocate memory (%lu bytes)", (unsigned long)size);
         lv_mem_monitor_t mon;
@@ -146,6 +142,11 @@ void * lv_mem_alloc(size_t size)
                      (int)(mon.total_size - mon.free_size), mon.used_pct, mon.frag_pct,
                      (int)mon.free_biggest_size);
     }
+#if LV_MEM_ADD_JUNK
+    else {
+        lv_memset(alloc, 0xaa, size);
+    }
+#endif
 
     MEM_TRACE("allocated at %p", alloc);
     return alloc;
@@ -227,7 +228,7 @@ lv_res_t lv_mem_test(void)
 
 /**
  * Give information about the work memory of dynamic allocation
- * @param mon_p pointer to a dm_mon_p variable,
+ * @param mon_p pointer to a lv_mem_monitor_t variable,
  *              the result of the analysis will be stored here
  */
 void lv_mem_monitor(lv_mem_monitor_t * mon_p)
diff --git a/src/misc/lv_mem.h b/src/misc/lv_mem.h
index 0d7d29809..0d1817fed 100644
--- a/src/misc/lv_mem.h
+++ b/src/misc/lv_mem.h
@@ -17,12 +17,9 @@ extern "C" {
 
 #include <stdint.h>
 #include <stddef.h>
-#include "lv_log.h"
-#include "lv_types.h"
-
-#if LV_MEMCPY_MEMSET_STD
 #include <string.h>
-#endif
+
+#include "lv_types.h"
 
 /*********************
  *      DEFINES
@@ -99,7 +96,7 @@ lv_res_t lv_mem_test(void);
 
 /**
  * Give information about the work memory of dynamic allocation
- * @param mon_p pointer to a dm_mon_p variable,
+ * @param mon_p pointer to a lv_mem_monitor_t variable,
  *              the result of the analysis will be stored here
  */
 void lv_mem_monitor(lv_mem_monitor_t * mon_p);
diff --git a/src/misc/lv_printf.c b/src/misc/lv_printf.c
index c98faa9d1..ebe8a55c0 100644
--- a/src/misc/lv_printf.c
+++ b/src/misc/lv_printf.c
@@ -37,7 +37,6 @@
 #if LV_SPRINTF_CUSTOM == 0
 
 #include <stdbool.h>
-#include <stdint.h>
 
 #define PRINTF_DISABLE_SUPPORT_FLOAT    (!LV_SPRINTF_USE_FLOAT)
 
diff --git a/src/misc/lv_style.c b/src/misc/lv_style.c
index bcf76c948..160c1de53 100644
--- a/src/misc/lv_style.c
+++ b/src/misc/lv_style.c
@@ -295,6 +295,7 @@ uint8_t _lv_style_get_prop_group(lv_style_prop_t prop)
     if(group > 7) group = 7;    /*The MSB marks all the custom properties*/
     return (uint8_t)group;
 }
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/
diff --git a/src/misc/lv_timer.c b/src/misc/lv_timer.c
index ea4635d70..d8dd55b7a 100644
--- a/src/misc/lv_timer.c
+++ b/src/misc/lv_timer.c
@@ -6,9 +6,10 @@
  *      INCLUDES
  *********************/
 #include "lv_timer.h"
-#include <stddef.h>
-#include "../misc/lv_assert.h"
 #include "../hal/lv_hal_tick.h"
+#include "lv_assert.h"
+#include "lv_mem.h"
+#include "lv_ll.h"
 #include "lv_gc.h"
 
 /*********************
@@ -292,7 +293,7 @@ lv_timer_t * lv_timer_get_next(lv_timer_t * timer)
  **********************/
 
 /**
- * Execute timer if its priority is appropriate
+ * Execute timer if its remaining time is zero
  * @param timer pointer to lv_timer
  * @return true: execute, false: not executed
  */
diff --git a/src/misc/lv_timer.h b/src/misc/lv_timer.h
index 71c63655f..ce94c7b04 100644
--- a/src/misc/lv_timer.h
+++ b/src/misc/lv_timer.h
@@ -16,8 +16,6 @@ extern "C" {
 
 #include <stdint.h>
 #include <stdbool.h>
-#include "lv_mem.h"
-#include "lv_ll.h"
 
 /*********************
  *      DEFINES
diff --git a/src/misc/lv_tlsf.c b/src/misc/lv_tlsf.c
index 97304aebd..63d1842d6 100644
--- a/src/misc/lv_tlsf.c
+++ b/src/misc/lv_tlsf.c
@@ -2,11 +2,11 @@
 #if LV_MEM_CUSTOM == 0
 
 #include <limits.h>
-#include <stddef.h>
 #include "lv_tlsf.h"
 #include "lv_mem.h"
 #include "lv_log.h"
 #include "lv_assert.h"
+
 #undef  printf
 #define printf LV_LOG_ERROR
 
@@ -887,7 +887,7 @@ int lv_tlsf_check(lv_tlsf_t tlsf)
 
 static void default_walker(void * ptr, size_t size, int used, void * user)
 {
-    (void)user;
+    LV_UNUSED(user);
     printf("\t%p %s size: %x (%p)\n", ptr, used ? "used" : "free", (unsigned int)size, (void *)block_from_ptr(ptr));
 }
 
@@ -1087,7 +1087,7 @@ lv_tlsf_t lv_tlsf_create_with_pool(void * mem, size_t bytes)
 void lv_tlsf_destroy(lv_tlsf_t tlsf)
 {
     /* Nothing to do. */
-    (void)tlsf;
+    LV_UNUSED(tlsf);
 }
 
 lv_pool_t lv_tlsf_get_pool(lv_tlsf_t tlsf)
diff --git a/src/misc/lv_tlsf.h b/src/misc/lv_tlsf.h
index c31e5b493..77424ab83 100644
--- a/src/misc/lv_tlsf.h
+++ b/src/misc/lv_tlsf.h
@@ -1,8 +1,8 @@
 #include "../lv_conf_internal.h"
 #if LV_MEM_CUSTOM == 0
 
-#ifndef INCLUDED_tlsf
-#define INCLUDED_tlsf
+#ifndef LV_TLSF_H
+#define LV_TLSF_H
 
 /*
 ** Two Level Segregated Fit memory allocator, version 3.1.
@@ -90,6 +90,6 @@ int lv_tlsf_check_pool(lv_pool_t pool);
 };
 #endif
 
-#endif
+#endif /*LV_TLSF_H*/
 
 #endif /* LV_MEM_CUSTOM == 0 */
diff --git a/src/misc/lv_txt.c b/src/misc/lv_txt.c
index 21cf8d04b..b8c31e5b7 100644
--- a/src/misc/lv_txt.c
+++ b/src/misc/lv_txt.c
@@ -813,7 +813,7 @@ static uint32_t lv_txt_iso8859_1_prev(const char * txt, uint32_t * i)
  */
 static uint32_t lv_txt_iso8859_1_get_byte_id(const char * txt, uint32_t utf8_id)
 {
-    (void)txt;      /*Unused*/
+    LV_UNUSED(txt); /*Unused*/
     return utf8_id; /*In Non encoded no difference*/
 }
 
@@ -826,7 +826,7 @@ static uint32_t lv_txt_iso8859_1_get_byte_id(const char * txt, uint32_t utf8_id)
  */
 static uint32_t lv_txt_iso8859_1_get_char_id(const char * txt, uint32_t byte_id)
 {
-    (void)txt;      /*Unused*/
+    LV_UNUSED(txt); /*Unused*/
     return byte_id; /*In Non encoded no difference*/
 }
 
diff --git a/src/misc/lv_types.h b/src/misc/lv_types.h
index 155a76b37..172f21c43 100644
--- a/src/misc/lv_types.h
+++ b/src/misc/lv_types.h
@@ -41,7 +41,7 @@ extern "C" {
  */
 enum {
     LV_RES_INV = 0, /*Typically indicates that the object is deleted (become invalid) in the action
-                       function or an operation was failed*/
+                      function or an operation was failed*/
     LV_RES_OK,      /*The object is valid (no deleted) after the action*/
 };
 typedef uint8_t lv_res_t;
@@ -69,7 +69,7 @@ typedef uint32_t lv_uintptr_t;
  *      MACROS
  **********************/
 
-#define LV_UNUSED(x) ((void) x)
+#define LV_UNUSED(x) ((void)x)
 
 #define _LV_CONCAT(x, y) x ## y
 #define LV_CONCAT(x, y) _LV_CONCAT(x, y)