diff --git a/hw/bsp/ea4357/board.mk b/hw/bsp/ea4357/board.mk
index 2ee6b695..c77ee453 100644
--- a/hw/bsp/ea4357/board.mk
+++ b/hw/bsp/ea4357/board.mk
@@ -3,8 +3,6 @@ CFLAGS += \
   -mthumb \
   -mabi=aapcs \
   -mcpu=cortex-m4 \
-  -mfloat-abi=hard \
-  -mfpu=fpv4-sp-d16 \
   -nostdlib \
   -D__USE_LPCOPEN \
   -DCORE_M4 \
@@ -40,8 +38,8 @@ CHIP_FAMILY = transdimension
 FREERTOS_PORT = ARM_CM4F
 
 # For flash-jlink target
-JLINK_DEVICE = LPC4357
-JLINK_IF = jtag
+JLINK_DEVICE = LPC4357_M4
+JLINK_IF = swd
 
 # flash using jlink
 flash: flash-jlink
diff --git a/hw/bsp/mcb1800/board.mk b/hw/bsp/mcb1800/board.mk
index 7ff17dae..e3f07d0d 100644
--- a/hw/bsp/mcb1800/board.mk
+++ b/hw/bsp/mcb1800/board.mk
@@ -6,7 +6,7 @@ CFLAGS += \
   -nostdlib \
   -DCORE_M3 \
   -D__USE_LPCOPEN \
-  -DCFG_TUSB_MCU=OPT_MCU_LPC18XX \
+  -DCFG_TUSB_MCU=OPT_MCU_LPC18XX
 
 # mcu driver cause following warnings
 CFLAGS += -Wno-error=unused-parameter -Wno-error=strict-prototypes
diff --git a/hw/bsp/ngx4330/board.mk b/hw/bsp/ngx4330/board.mk
index 97c24b40..df9df63a 100644
--- a/hw/bsp/ngx4330/board.mk
+++ b/hw/bsp/ngx4330/board.mk
@@ -3,8 +3,6 @@ CFLAGS += \
   -mthumb \
   -mabi=aapcs \
   -mcpu=cortex-m4 \
-  -mfloat-abi=hard \
-  -mfpu=fpv4-sp-d16 \
   -nostdlib \
   -DCORE_M4 \
   -DCFG_TUSB_MCU=OPT_MCU_LPC43XX \
diff --git a/src/class/msc/msc_host.c b/src/class/msc/msc_host.c
index 98c71eb7..3aa697b1 100644
--- a/src/class/msc/msc_host.c
+++ b/src/class/msc/msc_host.c
@@ -310,6 +310,7 @@ bool msch_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_interface_t const *it
   (*p_length) += sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t);
 
   //------------- Get Max Lun -------------//
+  TU_LOG2("MSC Get Max Lun\r\n");
   tusb_control_request_t request = {
         .bmRequestType_bit = { .recipient = TUSB_REQ_RCPT_INTERFACE, .type = TUSB_REQ_TYPE_CLASS, .direction = TUSB_DIR_IN },
         .bRequest = MSC_REQ_GET_MAX_LUN,
diff --git a/src/host/usbh.c b/src/host/usbh.c
index 8536cec0..c5f28cf0 100644
--- a/src/host/usbh.c
+++ b/src/host/usbh.c
@@ -42,10 +42,17 @@
 //--------------------------------------------------------------------+
 // MACRO CONSTANT TYPEDEF
 //--------------------------------------------------------------------+
+#if CFG_TUSB_DEBUG >= 2
+  #define DRIVER_NAME(_name)    .name = _name,
+#else
+  #define DRIVER_NAME(_name)
+#endif
+
 static host_class_driver_t const usbh_class_drivers[] =
 {
   #if CFG_TUH_CDC
     {
+      DRIVER_NAME("CDC")
       .class_code = TUSB_CLASS_CDC,
       .init       = cdch_init,
       .open       = cdch_open,
@@ -56,6 +63,7 @@ static host_class_driver_t const usbh_class_drivers[] =
 
   #if CFG_TUH_MSC
     {
+      DRIVER_NAME("MSC")
       .class_code = TUSB_CLASS_MSC,
       .init       = msch_init,
       .open       = msch_open,
@@ -66,6 +74,7 @@ static host_class_driver_t const usbh_class_drivers[] =
 
   #if HOST_CLASS_HID
     {
+      DRIVER_NAME("HID")
       .class_code = TUSB_CLASS_HID,
       .init       = hidh_init,
       .open       = hidh_open_subtask,
@@ -76,6 +85,7 @@ static host_class_driver_t const usbh_class_drivers[] =
 
   #if CFG_TUH_HUB
     {
+      DRIVER_NAME("HUB")
       .class_code = TUSB_CLASS_HUB,
       .init       = hub_init,
       .open       = hub_open,
@@ -86,6 +96,7 @@ static host_class_driver_t const usbh_class_drivers[] =
 
   #if CFG_TUH_VENDOR
     {
+      DRIVER_NAME("VENDOR")
       .class_code = TUSB_CLASS_VENDOR_SPECIFIC,
       .init       = cush_init,
       .open       = cush_open_subtask,
@@ -131,7 +142,7 @@ static inline void osal_task_delay(uint32_t msec)
 {
   (void) msec;
 
-  uint32_t start = hcd_frame_number(TUH_OPT_RHPORT);
+  const uint32_t start = hcd_frame_number(TUH_OPT_RHPORT);
   while ( ( hcd_frame_number(TUH_OPT_RHPORT) - start ) < msec ) {}
 }
 
@@ -162,7 +173,11 @@ bool usbh_init(void)
   }
 
   // Class drivers init
-  for (uint8_t drv_id = 0; drv_id < USBH_CLASS_DRIVER_COUNT; drv_id++) usbh_class_drivers[drv_id].init();
+  for (uint8_t drv_id = 0; drv_id < USBH_CLASS_DRIVER_COUNT; drv_id++)
+  {
+    TU_LOG2("%s init\r\n", usbh_class_drivers[drv_id].name);
+    usbh_class_drivers[drv_id].init();
+  }
 
   TU_ASSERT(hcd_init());
   hcd_int_enable(TUH_OPT_RHPORT);
@@ -269,6 +284,7 @@ void hcd_event_xfer_complete(uint8_t dev_addr, uint8_t ep_addr, xfer_result_t ev
 
     if (usbh_class_drivers[drv_id].isr)
     {
+      TU_LOG2("%s isr\r\n", usbh_class_drivers[drv_id].name);
       usbh_class_drivers[drv_id].isr(dev_addr, ep_addr, event, xferred_bytes);
     }
     else
@@ -336,7 +352,11 @@ static void usbh_device_unplugged(uint8_t rhport, uint8_t hub_addr, uint8_t hub_
       if (tuh_umount_cb) tuh_umount_cb(dev_addr);
 
       // Close class driver
-      for (uint8_t drv_id = 0; drv_id < USBH_CLASS_DRIVER_COUNT; drv_id++) usbh_class_drivers[drv_id].close(dev_addr);
+      for (uint8_t drv_id = 0; drv_id < USBH_CLASS_DRIVER_COUNT; drv_id++)
+      {
+        TU_LOG2("%s close\r\n", usbh_class_drivers[drv_id].name);
+        usbh_class_drivers[drv_id].close(dev_addr);
+      }
 
       memset(dev->itf2drv, 0xff, sizeof(dev->itf2drv)); // invalid mapping
       memset(dev->ep2drv , 0xff, sizeof(dev->ep2drv )); // invalid mapping
@@ -381,7 +401,7 @@ bool enum_task(hcd_event_t* event)
   {
     if( hcd_port_connect_status(dev0->rhport) )
     {
-      TU_LOG2("Connect \r\n");
+      TU_LOG2("Device connect \r\n");
 
       // connection event
       osal_task_delay(POWER_STABLE_DELAY); // wait until device is stable. Increase this if the first 8 bytes is failed to get
@@ -396,7 +416,7 @@ bool enum_task(hcd_event_t* event)
     }
     else
     {
-      TU_LOG2("Disconnect \r\n");
+      TU_LOG2("Device disconnect \r\n");
 
       // disconnection event
       usbh_device_unplugged(dev0->rhport, 0, 0);
@@ -451,7 +471,7 @@ bool enum_task(hcd_event_t* event)
   TU_ASSERT_ERR( usbh_pipe_control_open(0, 8) );
 
   //------------- Get first 8 bytes of device descriptor to get Control Endpoint Size -------------//
-  TU_LOG2("Get 8 byte of Device Descriptor \r\n");
+  TU_LOG2("Get 8 byte of Device Descriptor\r\n");
   request = (tusb_control_request_t ) {
         .bmRequestType_bit = { .recipient = TUSB_REQ_RCPT_DEVICE, .type = TUSB_REQ_TYPE_STANDARD, .direction = TUSB_DIR_IN },
         .bRequest = TUSB_REQ_GET_DESCRIPTOR,
@@ -536,7 +556,7 @@ bool enum_task(hcd_event_t* event)
   TU_ASSERT(configure_selected <= new_dev->configure_count); // TODO notify application when invalid configuration
 
   //------------- Get 9 bytes of configuration descriptor -------------//
-  TU_LOG2("Get 9 bytes of Configuration Descriptor \r\n");
+  TU_LOG2("Get 9 bytes of Configuration Descriptor\r\n");
   request = (tusb_control_request_t ) {
         .bmRequestType_bit = { .recipient = TUSB_REQ_RCPT_DEVICE, .type = TUSB_REQ_TYPE_STANDARD, .direction = TUSB_DIR_IN },
         .bRequest = TUSB_REQ_GET_DESCRIPTOR,
@@ -550,7 +570,7 @@ bool enum_task(hcd_event_t* event)
   TU_ASSERT( CFG_TUSB_HOST_ENUM_BUFFER_SIZE >= ((tusb_desc_configuration_t*)_usbh_ctrl_buf)->wTotalLength );
 
   //------------- Get full configuration descriptor -------------//
-  TU_LOG2("Get full Configuration Descriptor \r\n");
+  TU_LOG2("Get full Configuration Descriptor\r\n");
   request.wLength = ((tusb_desc_configuration_t*)_usbh_ctrl_buf)->wTotalLength; // full length
   TU_ASSERT( usbh_control_xfer( new_addr, &request, _usbh_ctrl_buf ) );
 
@@ -558,7 +578,7 @@ bool enum_task(hcd_event_t* event)
   new_dev->interface_count = ((tusb_desc_configuration_t*) _usbh_ctrl_buf)->bNumInterfaces;
 
   //------------- Set Configure -------------//
-  TU_LOG2("Set Configuration Descriptor \r\n");
+  TU_LOG2("Set Configuration Descriptor\r\n");
   request = (tusb_control_request_t ) {
         .bmRequestType_bit = { .recipient = TUSB_REQ_RCPT_DEVICE, .type = TUSB_REQ_TYPE_STANDARD, .direction = TUSB_DIR_OUT },
         .bRequest = TUSB_REQ_SET_CONFIGURATION,
@@ -568,6 +588,7 @@ bool enum_task(hcd_event_t* event)
   };
   TU_ASSERT(usbh_control_xfer( new_addr, &request, NULL ));
 
+  TU_LOG2("Device configured\r\n");
   new_dev->state = TUSB_DEVICE_STATE_CONFIGURED;
 
   //------------- TODO Get String Descriptors -------------//
@@ -575,6 +596,8 @@ bool enum_task(hcd_event_t* event)
   //------------- parse configuration & install drivers -------------//
   uint8_t const* p_desc = _usbh_ctrl_buf + sizeof(tusb_desc_configuration_t);
 
+  TU_LOG2_MEM(_usbh_ctrl_buf, ((tusb_desc_configuration_t*)_usbh_ctrl_buf)->wTotalLength, 0);
+
   // parse each interfaces
   while( p_desc < _usbh_ctrl_buf + ((tusb_desc_configuration_t*)_usbh_ctrl_buf)->wTotalLength )
   {
@@ -584,7 +607,7 @@ bool enum_task(hcd_event_t* event)
       p_desc = tu_desc_next(p_desc); // skip the descriptor, increase by the descriptor's length
     }else
     {
-      tusb_desc_interface_t* desc_itf = (tusb_desc_interface_t*) p_desc;
+      tusb_desc_interface_t const* desc_itf = (tusb_desc_interface_t const*) p_desc;
 
       // Check if class is supported
       uint8_t drv_id;
@@ -614,6 +637,7 @@ bool enum_task(hcd_event_t* event)
         {
           uint16_t itf_len = 0;
 
+          TU_LOG2("%s open\r\n", usbh_class_drivers[drv_id].name);
           TU_ASSERT( usbh_class_drivers[drv_id].open(new_dev->rhport, new_addr, desc_itf, &itf_len) );
           TU_ASSERT( itf_len >= sizeof(tusb_desc_interface_t) );
           p_desc += itf_len;
diff --git a/src/host/usbh.h b/src/host/usbh.h
index cc112d75..39e7a4e0 100644
--- a/src/host/usbh.h
+++ b/src/host/usbh.h
@@ -52,6 +52,10 @@ typedef enum tusb_interface_status_{
 } tusb_interface_status_t;
 
 typedef struct {
+  #if CFG_TUSB_DEBUG >= 2
+  char const* name;
+  #endif
+
   uint8_t class_code;
 
   void (* const init) (void);
diff --git a/src/osal/osal.h b/src/osal/osal.h
index c61f0c91..b5057ff4 100644
--- a/src/osal/osal.h
+++ b/src/osal/osal.h
@@ -37,9 +37,9 @@
 #include "common/tusb_common.h"
 
 // Return immediately
-#define OSAL_TIMEOUT_NOTIMEOUT (0)
+#define OSAL_TIMEOUT_NOTIMEOUT     (0)
 // Default timeout
-#define OSAL_TIMEOUT_NORMAL       (10)
+#define OSAL_TIMEOUT_NORMAL        (10)
 // Wait forever
 #define OSAL_TIMEOUT_WAIT_FOREVER  (UINT32_MAX)