diff --git a/demos/host/keyboard_app.c b/demos/host/keyboard_app.c
new file mode 100644
index 000000000..20e6c64e1
--- /dev/null
+++ b/demos/host/keyboard_app.c
@@ -0,0 +1,58 @@
+/*
+ * keyboard_app.c
+ *
+ *  Created on: Mar 24, 2013
+ *      Author: hathach
+ */
+
+/*
+ * Software License Agreement (BSD License)
+ * Copyright (c) 2012, hathach (tinyusb.net)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the tiny usb stack.
+ */
+
+//--------------------------------------------------------------------+
+// INCLUDE
+//--------------------------------------------------------------------+
+#include "tusb.h"
+#include "keyboard_app.h"
+
+//--------------------------------------------------------------------+
+// MACRO CONSTANT TYPEDEF
+//--------------------------------------------------------------------+
+
+//--------------------------------------------------------------------+
+// INTERNAL OBJECT & FUNCTION DECLARATION
+//--------------------------------------------------------------------+
+
+//--------------------------------------------------------------------+
+// IMPLEMENTATION
+//--------------------------------------------------------------------+
+void keyboard_app_task(void)
+{
+
+}
diff --git a/demos/host/keyboard_app.h b/demos/host/keyboard_app.h
new file mode 100644
index 000000000..060adc3bf
--- /dev/null
+++ b/demos/host/keyboard_app.h
@@ -0,0 +1,66 @@
+/*
+ * keyboard_app.h
+ *
+ *  Created on: Mar 24, 2013
+ *      Author: hathach
+ */
+
+/*
+ * Software License Agreement (BSD License)
+ * Copyright (c) 2012, hathach (tinyusb.net)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the tiny usb stack.
+ */
+
+/** \file
+ *  \brief TBD
+ *
+ *  \note TBD
+ */
+
+/** \ingroup TBD
+ *  \defgroup TBD
+ *  \brief TBD
+ *
+ *  @{
+ */
+
+#ifndef _TUSB_KEYBOARD_APP_H_
+#define _TUSB_KEYBOARD_APP_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* _TUSB_KEYBOARD_APP_H_ */
+
+/** @} */
diff --git a/tests/test/host/test_enum_task.c b/tests/test/host/test_enum_task.c
index 90cc7a022..4d21e7a0f 100644
--- a/tests/test/host/test_enum_task.c
+++ b/tests/test/host/test_enum_task.c
@@ -49,7 +49,7 @@
 
 extern usbh_device_info_t usbh_device_info_pool[TUSB_CFG_HOST_DEVICE_MAX+1];
 extern uint8_t enum_data_buffer[TUSB_CFG_HOST_ENUM_BUFFER_SIZE];
-tusb_handle_device_t dev_hdl;
+uint8_t dev_addr;
 
 usbh_enumerate_t const enum_connect = {
     .core_id  = 0,
diff --git a/tests/test/host/test_hidh_keyboard.c b/tests/test/host/test_hidh_keyboard.c
index ac690a8f9..6a619c143 100644
--- a/tests/test/host/test_hidh_keyboard.c
+++ b/tests/test/host/test_hidh_keyboard.c
@@ -55,14 +55,14 @@ tusb_keyboard_report_t sample_key[2] =
     }
 };
 
-tusb_handle_device_t device_hdl;
+uint8_t dev_addr;
 tusb_descriptor_interface_t kbd_descriptor;
 tusb_keyboard_report_t report;
 uint8_t instance_num;
 
 void setUp(void)
 {
-  device_hdl = 0; // deviceID = 0 ; Configure = 1
+  dev_addr = 0;
   instance_num = 0;
   memset(&report, 0, sizeof(tusb_keyboard_report_t));
 
@@ -101,11 +101,11 @@ void test_keyboard_no_instances_invalid_para(void)
 void test_keyboard_install_ok(void)
 {
   tusbh_device_status_get_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  TEST_ASSERT_EQUAL(0, tusbh_hid_keyboard_no_instances(device_hdl));
+  TEST_ASSERT_EQUAL(0, tusbh_hid_keyboard_no_instances(dev_addr));
 
-  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, hidh_keyboard_install(device_hdl, (uint8_t*) &kbd_descriptor));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, hidh_keyboard_install(dev_addr, (uint8_t*) &kbd_descriptor));
   tusbh_device_status_get_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  TEST_ASSERT_EQUAL(1, tusbh_hid_keyboard_no_instances(device_hdl));
+  TEST_ASSERT_EQUAL(1, tusbh_hid_keyboard_no_instances(dev_addr));
 }
 
 void test_keyboard_init(void)
@@ -163,19 +163,19 @@ void test_keyboard_get_invalid_para()
 void test_keyboard_get_class_not_supported()
 {
   tusbh_device_status_get_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  keyboard_info_pool[device_hdl].instance[0].pipe_in = (pipe_handle_t) { 0 };
-  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DEVICE_DONT_SUPPORT, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
+  keyboard_info_pool[dev_addr].instance[0].pipe_in = (pipe_handle_t) { 0 };
+  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DEVICE_DONT_SUPPORT, tusbh_hid_keyboard_get(dev_addr, instance_num, &report));
 }
 
 void test_keyboard_get_report_not_available()
 {
   tusbh_device_status_get_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
   usbh_pipe_status_get_IgnoreAndReturn(PIPE_STATUS_BUSY);
-  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE, tusbh_hid_keyboard_get(dev_addr, instance_num, &report));
 
   tusbh_device_status_get_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
   usbh_pipe_status_get_IgnoreAndReturn(PIPE_STATUS_READY);
-  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE, tusbh_hid_keyboard_get(dev_addr, instance_num, &report));
 }
 
 void test_keyboard_get_ok()
@@ -183,16 +183,16 @@ void test_keyboard_get_ok()
   usbh_pipe_status_get_StubWithCallback(pipe_status_get_stub);
 
   tusbh_device_status_get_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, tusbh_hid_keyboard_get(dev_addr, instance_num, &report));
   TEST_ASSERT_EQUAL_MEMORY(&sample_key[0], &report, sizeof(tusb_keyboard_report_t));
 
   tusbh_device_status_get_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE, tusbh_hid_keyboard_get(dev_addr, instance_num, &report));
   tusbh_device_status_get_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE, tusbh_hid_keyboard_get(dev_addr, instance_num, &report));
 
   tusbh_device_status_get_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, tusbh_hid_keyboard_get(dev_addr, instance_num, &report));
   TEST_ASSERT_EQUAL_MEMORY(&sample_key[1], &report, sizeof(tusb_keyboard_report_t));
 }
 
diff --git a/tests/test/host/test_usbh.c b/tests/test/host/test_usbh.c
index 885da78c3..07b1ef072 100644
--- a/tests/test/host/test_usbh.c
+++ b/tests/test/host/test_usbh.c
@@ -47,10 +47,10 @@
 #include "mock_hid_host.h"
 
 extern usbh_device_info_t usbh_device_info_pool[TUSB_CFG_HOST_DEVICE_MAX+1];
-tusb_handle_device_t dev_hdl;
+uint8_t dev_addr;
 void setUp(void)
 {
-  dev_hdl = 0;
+  dev_addr = 0;
   memset(usbh_device_info_pool, 0, (TUSB_CFG_HOST_DEVICE_MAX+1)*sizeof(usbh_device_info_t));
 }
 
@@ -63,16 +63,16 @@ void tearDown(void)
 //--------------------------------------------------------------------+
 void test_usbh_status_get_fail(void)
 {
-  usbh_device_info_pool[dev_hdl].state = 0;
+  usbh_device_info_pool[dev_addr].state = 0;
 
   TEST_ASSERT_EQUAL( 0, tusbh_device_status_get(TUSB_CFG_HOST_DEVICE_MAX+1) );
-  TEST_ASSERT_EQUAL( TUSB_DEVICE_STATE_UNPLUG, tusbh_device_status_get(dev_hdl) );
+  TEST_ASSERT_EQUAL( TUSB_DEVICE_STATE_UNPLUG, tusbh_device_status_get(dev_addr) );
 }
 
 void test_usbh_status_get_succeed(void)
 {
-  usbh_device_info_pool[dev_hdl].state = TUSB_DEVICE_STATE_CONFIGURED;
-  TEST_ASSERT_EQUAL( TUSB_DEVICE_STATE_CONFIGURED, tusbh_device_status_get(dev_hdl) );
+  usbh_device_info_pool[dev_addr].state = TUSB_DEVICE_STATE_CONFIGURED;
+  TEST_ASSERT_EQUAL( TUSB_DEVICE_STATE_CONFIGURED, tusbh_device_status_get(dev_addr) );
 }
 
 //--------------------------------------------------------------------+
diff --git a/tests/test/support/tusb_callback.h b/tests/test/support/tusb_callback.h
index 6c13b4528..3d142e39d 100644
--- a/tests/test/support/tusb_callback.h
+++ b/tests/test/support/tusb_callback.h
@@ -59,7 +59,7 @@
 #include "usbh.h"
 
 uint8_t      tusbh_device_attached_cb (tusb_descriptor_device_t const *p_desc_device) ATTR_WEAK ATTR_WARN_UNUSED_RESULT;
-void         tusbh_device_mount_succeed_cb (tusb_handle_device_t device_hdl) ATTR_WEAK;
+void         tusbh_device_mount_succeed_cb (uint8_t dev_addr) ATTR_WEAK;
 void         tusbh_device_mount_failed_cb(tusb_error_t error, tusb_descriptor_device_t const *p_desc_device) ATTR_WEAK;
 
 #ifdef __cplusplus
diff --git a/tinyusb/class/hid_host.c b/tinyusb/class/hid_host.c
index c46125b95..320957759 100644
--- a/tinyusb/class/hid_host.c
+++ b/tinyusb/class/hid_host.c
@@ -61,15 +61,15 @@ STATIC_ class_hid_keyboard_info_t keyboard_info_pool[TUSB_CFG_HOST_DEVICE_MAX];
 //--------------------------------------------------------------------+
 // PUBLIC API (Parameter Verification is required)
 //--------------------------------------------------------------------+
-tusb_error_t tusbh_hid_keyboard_get(tusb_handle_device_t const device_hdl, uint8_t instance_num, tusb_keyboard_report_t * const report)
+tusb_error_t tusbh_hid_keyboard_get(uint8_t const dev_addr, uint8_t instance_num, tusb_keyboard_report_t * const report)
 {
   keyboard_interface_t *p_kbd;
 
-  ASSERT_INT(TUSB_DEVICE_STATE_CONFIGURED, tusbh_device_status_get(device_hdl), TUSB_ERROR_DEVICE_NOT_READY);
+  ASSERT_INT(TUSB_DEVICE_STATE_CONFIGURED, tusbh_device_status_get(dev_addr), TUSB_ERROR_DEVICE_NOT_READY);
   ASSERT_PTR(report, TUSB_ERROR_INVALID_PARA);
   ASSERT(instance_num < TUSB_CFG_HOST_HID_KEYBOARD_NO_INSTANCES_PER_DEVICE, TUSB_ERROR_INVALID_PARA);
 
-  p_kbd = &keyboard_info_pool[device_hdl].instance[instance_num];
+  p_kbd = &keyboard_info_pool[dev_addr].instance[instance_num];
 
   ASSERT(0 != p_kbd->pipe_in.dev_addr, TUSB_ERROR_CLASS_DEVICE_DONT_SUPPORT);
 
@@ -80,11 +80,11 @@ tusb_error_t tusbh_hid_keyboard_get(tusb_handle_device_t const device_hdl, uint8
   return TUSB_ERROR_NONE;
 }
 
-uint8_t tusbh_hid_keyboard_no_instances(tusb_handle_device_t const device_hdl)
+uint8_t tusbh_hid_keyboard_no_instances(uint8_t const dev_addr)
 {
-  ASSERT_INT(TUSB_DEVICE_STATE_CONFIGURED, tusbh_device_status_get(device_hdl), 0);
+  ASSERT_INT(TUSB_DEVICE_STATE_CONFIGURED, tusbh_device_status_get(dev_addr), 0);
 
-  return keyboard_info_pool[device_hdl].instance_count;
+  return keyboard_info_pool[dev_addr].instance_count;
 }
 
 //--------------------------------------------------------------------+
diff --git a/tinyusb/class/hid_host.h b/tinyusb/class/hid_host.h
index c0cb81702..669e962d6 100644
--- a/tinyusb/class/hid_host.h
+++ b/tinyusb/class/hid_host.h
@@ -62,8 +62,9 @@
 //--------------------------------------------------------------------+
 // APPLICATION API
 //--------------------------------------------------------------------+
-uint8_t tusbh_hid_keyboard_no_instances(tusb_handle_device_t const device_hdl) ATTR_WARN_UNUSED_RESULT;
-tusb_error_t tusbh_hid_keyboard_get(tusb_handle_device_t const handle, uint8_t instance_num, tusb_keyboard_report_t * const report) ATTR_WARN_UNUSED_RESULT;
+uint8_t tusbh_hid_keyboard_no_instances(uint8_t const dev_addr) ATTR_WARN_UNUSED_RESULT;
+tusb_error_t tusbh_hid_keyboard_get(uint8_t const handle, uint8_t const instance_num, tusb_keyboard_report_t * const report) ATTR_WARN_UNUSED_RESULT;
+pipe_status_t tusbh_hid_keyboard_pipe_status(uint8_t const handle, uint8_t const instance_num);
 
 //--------------------------------------------------------------------+
 // INTERNAL API
diff --git a/tinyusb/host/usbh.c b/tinyusb/host/usbh.c
index c841d3ceb..b22478b72 100644
--- a/tinyusb/host/usbh.c
+++ b/tinyusb/host/usbh.c
@@ -98,10 +98,10 @@ static inline uint8_t get_configure_number_for_device(tusb_descriptor_device_t*
 //--------------------------------------------------------------------+
 // PUBLIC API (Parameter Verification is required)
 //--------------------------------------------------------------------+
-tusbh_device_status_t tusbh_device_status_get (tusb_handle_device_t const device_hdl)
+tusbh_device_status_t tusbh_device_status_get (uint8_t const dev_addr)
 {
-  ASSERT(device_hdl <= TUSB_CFG_HOST_DEVICE_MAX, 0);
-  return usbh_device_info_pool[device_hdl].state;
+  ASSERT(dev_addr <= TUSB_CFG_HOST_DEVICE_MAX, 0);
+  return usbh_device_info_pool[dev_addr].state;
 }
 
 //--------------------------------------------------------------------+
diff --git a/tinyusb/host/usbh.h b/tinyusb/host/usbh.h
index 2934e4c3c..d0e29a4ff 100644
--- a/tinyusb/host/usbh.h
+++ b/tinyusb/host/usbh.h
@@ -63,36 +63,6 @@
 //--------------------------------------------------------------------+
 // MACRO CONSTANT TYPEDEF
 //--------------------------------------------------------------------+
-#define CLASS_TABLE(ENTRY_EXPANDER) \
-    ENTRY_EXPANDER(TUSB_CLASS_AUDIO)\
-    ENTRY_EXPANDER(TUSB_CLASS_CDC)\
-    ENTRY_EXPANDER(TUSB_CLASS_HID)\
-    ENTRY_EXPANDER(TUSB_CLASS_PHYSICAL)\
-    ENTRY_EXPANDER(TUSB_CLASS_IMAGE)\
-    ENTRY_EXPANDER(TUSB_CLASS_PRINTER)\
-    ENTRY_EXPANDER(TUSB_CLASS_MSC)\
-    ENTRY_EXPANDER(TUSB_CLASS_HUB)\
-    ENTRY_EXPANDER(TUSB_CLASS_CDC_DATA)\
-    ENTRY_EXPANDER(TUSB_CLASS_SMART_CARD)\
-    ENTRY_EXPANDER(TUSB_CLASS_CONTENT_SECURITY)\
-    ENTRY_EXPANDER(TUSB_CLASS_VIDEO)\
-    ENTRY_EXPANDER(TUSB_CLASS_PERSONAL_HEALTHCARE)\
-    ENTRY_EXPANDER(TUSB_CLASS_AUDIO_VIDEO)\
-
-#define CLASS_LOOKUP_EXPAND(class_code)
-
-#define CLASS_LOOKUP_INIT_FUNCTION(class_code)\
-
-#define CLASS_EXPANDER_INIT(class_code)\
-
-
-
-//  TUSB_CLASS_DIAGNOSTIC           = 0xDC ,
-//  TUSB_CLASS_WIRELESS_CONTROLLER  = 0xE0 ,
-//  TUSB_CLASS_MISC                 = 0xEF ,
-//  TUSB_CLASS_APPLICATION_SPECIFIC = 0xEF ,
-//  TUSB_CLASS_VENDOR_SPECIFIC      = 0xFF
-
 typedef enum pipe_status_{
   PIPE_STATUS_READY = 0,
   PIPE_STATUS_BUSY,
@@ -101,7 +71,6 @@ typedef enum pipe_status_{
 } pipe_status_t;
 
 typedef uint32_t tusbh_flag_class_t;
-typedef uint32_t tusb_handle_device_t;
 typedef uint8_t  tusbh_device_status_t;
 
 typedef struct {
@@ -117,12 +86,17 @@ typedef struct {
 //--------------------------------------------------------------------+
 // APPLICATION API
 //--------------------------------------------------------------------+
+tusb_device_state_t tusbh_device_get_state(uint8_t dev_addr);
+
+//--------------------------------------------------------------------+
+// APPLICATION CALLBACK
+//--------------------------------------------------------------------+
 uint8_t      tusbh_device_attached_cb (tusb_descriptor_device_t const *p_desc_device) ATTR_WEAK ATTR_WARN_UNUSED_RESULT;
-void         tusbh_device_mount_succeed_cb (tusb_handle_device_t device_hdl) ATTR_WEAK;
+void         tusbh_device_mount_succeed_cb (uint8_t dev_addr) ATTR_WEAK;
 void         tusbh_device_mount_failed_cb(tusb_error_t error, tusb_descriptor_device_t const *p_desc_device) ATTR_WEAK; // TODO refractor remove desc_device
 
-tusb_error_t tusbh_configuration_set     (tusb_handle_device_t device_hdl, uint8_t configure_number) ATTR_WARN_UNUSED_RESULT;
-tusbh_device_status_t tusbh_device_status_get (tusb_handle_device_t const device_hdl) ATTR_WARN_UNUSED_RESULT;
+tusb_error_t tusbh_configuration_set     (uint8_t dev_addr, uint8_t configure_number) ATTR_WARN_UNUSED_RESULT;
+tusbh_device_status_t tusbh_device_status_get (uint8_t const dev_addr) ATTR_WARN_UNUSED_RESULT;
 
 #if TUSB_CFG_OS == TUSB_OS_NONE // TODO move later
 //static inline void tusb_tick_tock(void) ATTR_ALWAYS_INLINE;