diff --git a/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_demo.c b/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_demo.c
index c4818399f32b29f199d5048d5cdb59a030dc0b70..17d01e09cc40100c652a117a3b8604106dd4a34e 100644
--- a/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_demo.c
+++ b/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_demo.c
@@ -10,7 +10,7 @@
 #include <rtthread.h>
 #include <lvgl.h>
 #include <lv_port_indev.h>
-#define DBG_TAG    "LVGL"
+#define DBG_TAG    "LVGL.demo"
 #define DBG_LVL    DBG_INFO
 #include <rtdbg.h>
 
diff --git a/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_port_disp.c b/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_port_disp.c
index 4a3ea2601b509119ba0ea275cb9f9207e2f7ffc6..1d0c35e1584e5e6319a43876a0ddef8ac8ffc4bc 100644
--- a/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_port_disp.c
+++ b/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_port_disp.c
@@ -11,13 +11,13 @@
 #include <lcd_port.h>
 
 //#define DRV_DEBUG
-#define LOG_TAG             "lvgl.disp"
+#define LOG_TAG             "LVGL.port.disp"
 #include <drv_log.h>
 
 /*A static or global variable to store the buffers*/
 static lv_disp_draw_buf_t disp_buf;
 
-rt_device_t lcd_device = 0;
+static rt_device_t lcd_device = RT_NULL;
 static struct rt_device_graphic_info info;
 
 static lv_disp_drv_t disp_drv;  /*Descriptor of a display driver*/
@@ -41,7 +41,7 @@ static void DMA_TransferComplete(DMA_HandleTypeDef *han)
 
     if(y_fill_act > y2_fill)
     {
-          lv_disp_flush_ready(&disp_drv);
+        lv_disp_flush_ready(&disp_drv);
     }
     else
     {
@@ -51,16 +51,16 @@ static void DMA_TransferComplete(DMA_HandleTypeDef *han)
             (uint32_t)&((uint32_t *)info.framebuffer)[y_fill_act * info.width + x1_flush],
             (x2_flush - x1_flush + 1)) != HAL_OK)
         {
-            LOG_E("lvgl dma start error");
-            while(1);
+            LOG_E("HAL_DMA_Start_IT error");
+            RT_ASSERT(0);
         }
     }
 }
 
 static void DMA_TransferError(DMA_HandleTypeDef *han)
 {
-    LOG_E("dma transfer error");
-    while(1);
+    LOG_E("DMA_TransferError");
+    RT_ASSERT(0);
 }
 
 void DMA_STREAM_IRQHANDLER(void)
@@ -95,7 +95,8 @@ static void lvgl_dma_config(void)
 
     if (HAL_DMA_Init(&DmaHandle) != HAL_OK)
     {
-        while(1);
+        LOG_E("HAL_DMA_Init error");
+        RT_ASSERT(0);
     }
 
     HAL_DMA_RegisterCallback(&DmaHandle, HAL_DMA_XFER_CPLT_CB_ID, DMA_TransferComplete);
@@ -130,8 +131,8 @@ static void lcd_fb_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_colo
         (uint32_t)&((uint32_t *)info.framebuffer)[y_fill_act * info.width + x1_flush],
         (x2_flush - x1_flush + 1)) != HAL_OK)
     {
-        LOG_E("dma start it error");
-        while(1);
+        LOG_E("HAL_DMA_Start_IT error");
+        RT_ASSERT(0);
     }
 }
 
diff --git a/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_port_indev.c b/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_port_indev.c
index b190a32a914a117877c2126755f1616511cebbc5..50022c4edbfbfc31a35dd4cebb657dbad5f564f1 100644
--- a/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_port_indev.c
+++ b/bsp/stm32/stm32f469-st-disco/board/ports/lvgl/lv_port_indev.c
@@ -37,7 +37,7 @@ void lv_port_indev_init(void)
 {
     static lv_indev_drv_t indev_drv;
 
-    lv_indev_drv_init(&indev_drv);      /*Basic initialization*/
+    lv_indev_drv_init(&indev_drv); /*Basic initialization*/
     indev_drv.type = LV_INDEV_TYPE_POINTER;
     indev_drv.read_cb = input_read;
 
diff --git a/bsp/stm32/stm32l475-atk-pandora/board/ports/lvgl/lv_demo.c b/bsp/stm32/stm32l475-atk-pandora/board/ports/lvgl/lv_demo.c
index c8d09a8e949019d31e554bfb792a07b4be2c27a5..d72e6ae7baa71d50c43e9b98dbdfd2669e18da7f 100644
--- a/bsp/stm32/stm32l475-atk-pandora/board/ports/lvgl/lv_demo.c
+++ b/bsp/stm32/stm32l475-atk-pandora/board/ports/lvgl/lv_demo.c
@@ -11,7 +11,7 @@
 #include <lvgl.h>
 #include <lv_port_indev.h>
 #include <lv_demo_calendar.h>
-#define DBG_TAG    "LVGL"
+#define DBG_TAG    "LVGL.demo"
 #define DBG_LVL    DBG_INFO
 #include <rtdbg.h>