diff --git a/README.md b/README.md
index 635312eb..888e73f5 100644
--- a/README.md
+++ b/README.md
@@ -47,15 +47,15 @@ Currently the following OS are supported with tinyusb out of the box with a simp
 The stack supports the following MCUs
 
 - **Nordic:** nRF52840
-- **NXP:** LPC11Uxx, LPC13xx, LPC175x_6x, LPC177x_8x, LPC40xx, LPC43xx
-- **MicroChip:** SAMD21, SAMD51 (device only)
+- **NXP:** LPC11Uxx, LPC13xx, LPC175x_6x, LPC177x_8x, LPC18xx, LPC40xx, LPC43xx
+- **MicroChip:** SAMD21, SAMD51
 - **ST:** STM32F4
 
 [Here is the list of supported Boards](docs/boards.md)
 
 ## Compiler & IDE
 
-The stack is developed with GCC compiler, and should be compilable with others. However, it requires C99 to build with. Folder `examples` provide Makefile and Segger Embedded Studio build support.
+The stack is developed with GCC compiler, and should be compilable with others. Folder `examples` provide Makefile and Segger Embedded Studio build support.
 
 ## Getting Started
 
diff --git a/examples/device/cdc_msc_hid/src/main.c b/examples/device/cdc_msc_hid/src/main.c
index 1416852f..53161fe8 100644
--- a/examples/device/cdc_msc_hid/src/main.c
+++ b/examples/device/cdc_msc_hid/src/main.c
@@ -34,6 +34,14 @@
 //--------------------------------------------------------------------+
 // MACRO CONSTANT TYPEDEF PROTYPES
 //--------------------------------------------------------------------+
+
+/* Blink pattern
+ * - 250 ms  : device not mounted
+ * - 1000 ms : device mounted
+ * - 2000 ms : device is suspended
+ */
+static uint32_t blink_interval_ms = 250;
+
 void led_blinking_task(void);
 
 extern void virtual_com_task(void);
@@ -187,18 +195,19 @@ void tud_hid_generic_set_report_cb(uint8_t report_id, hid_report_type_t report_t
 #endif
 
 //--------------------------------------------------------------------+
-// tinyusb callbacks
+// Device callbacks
 //--------------------------------------------------------------------+
 
 // Invoked when device is mounted
 void tud_mount_cb(void)
 {
-
+  blink_interval_ms = 1000;
 }
 
 // Invoked when device is unmounted
 void tud_umount_cb(void)
 {
+  blink_interval_ms = 250;
 }
 
 //--------------------------------------------------------------------+
@@ -206,14 +215,12 @@ void tud_umount_cb(void)
 //--------------------------------------------------------------------+
 void led_blinking_task(void)
 {
-  const uint32_t interval_ms = 1000;
   static uint32_t start_ms = 0;
-
   static bool led_state = false;
 
   // Blink every 1000 ms
-  if ( board_millis() < start_ms + interval_ms) return; // not enough time
-  start_ms += interval_ms;
+  if ( board_millis() < start_ms + blink_interval_ms) return; // not enough time
+  start_ms += blink_interval_ms;
 
   board_led_control(led_state);
   led_state = 1 - led_state; // toggle
diff --git a/src/device/usbd.h b/src/device/usbd.h
index eb99337e..1a4a2183 100644
--- a/src/device/usbd.h
+++ b/src/device/usbd.h
@@ -34,16 +34,9 @@
  extern "C" {
 #endif
 
-//--------------------------------------------------------------------+
-// INCLUDE
-//--------------------------------------------------------------------+
 #include "common/tusb_common.h"
 #include "device/dcd.h"
 
-//--------------------------------------------------------------------+
-// MACRO CONSTANT TYPEDEF
-//--------------------------------------------------------------------+
-
 /// \brief Descriptor pointer collector to all the needed.
 typedef struct {
   void const * device;            ///< pointer to device descriptor \ref tusb_desc_device_t
@@ -64,7 +57,7 @@ typedef struct {
 extern tud_desc_set_t tud_desc_set;
 
 //--------------------------------------------------------------------+
-// APPLICATION API
+// Application API
 //--------------------------------------------------------------------+
 bool tud_mounted(void);
 void tud_task (void);
@@ -72,7 +65,7 @@ void tud_task (void);
 bool tud_remote_wakeup(void);
 
 //--------------------------------------------------------------------+
-// APPLICATION CALLBACK (WEAK is optional)
+// Application Callbacks (WEAK is optional)
 //--------------------------------------------------------------------+
 
 // Callback invoked when device is mounted (configured)