diff --git a/demos/device/keyboard/descriptors.c b/demos/device/keyboard/descriptors.c
index 8491087e4..bec4858ab 100644
--- a/demos/device/keyboard/descriptors.c
+++ b/demos/device/keyboard/descriptors.c
@@ -38,7 +38,7 @@
 #include "descriptors.h"
 
 #ifdef TUSB_CFG_DEVICE_HID_KEYBOARD
-TUSB_ATTR_RAM_SECTION ATTR_ALIGNED(4) const uint8_t HID_KeyboardReportDescriptor[] = {
+TUSB_CFG_ATTR_USBRAM ATTR_ALIGNED(4) const uint8_t HID_KeyboardReportDescriptor[] = {
   HID_UsagePage  ( HID_USAGE_PAGE_GENERIC     ),
   HID_Usage      ( HID_USAGE_GENERIC_KEYBOARD ),
   HID_Collection ( HID_Application            ),
@@ -81,7 +81,7 @@ TUSB_ATTR_RAM_SECTION ATTR_ALIGNED(4) const uint8_t HID_KeyboardReportDescriptor
 #endif
 
 #ifdef TUSB_CFG_DEVICE_HID_MOUSE
-TUSB_ATTR_RAM_SECTION ATTR_ALIGNED(4) const uint8_t HID_MouseReportDescriptor[] = {
+TUSB_CFG_ATTR_USBRAM ATTR_ALIGNED(4) const uint8_t HID_MouseReportDescriptor[] = {
   HID_UsagePage  ( HID_USAGE_PAGE_GENERIC     ),
   HID_Usage      ( HID_USAGE_GENERIC_MOUSE ),
   HID_Collection ( HID_Application            ),
@@ -119,7 +119,7 @@ TUSB_ATTR_RAM_SECTION ATTR_ALIGNED(4) const uint8_t HID_MouseReportDescriptor[]
 #endif
 
 /* USB Standard Device Descriptor */
-TUSB_ATTR_RAM_SECTION ATTR_ALIGNED(4) const USB_DEVICE_DESCRIPTOR USB_DeviceDescriptor =
+TUSB_CFG_ATTR_USBRAM ATTR_ALIGNED(4) const USB_DEVICE_DESCRIPTOR USB_DeviceDescriptor =
 {
   .bLength            = sizeof(USB_DEVICE_DESCRIPTOR),
   .bDescriptorType    = USB_DEVICE_DESCRIPTOR_TYPE,
@@ -153,7 +153,7 @@ TUSB_ATTR_RAM_SECTION ATTR_ALIGNED(4) const USB_DEVICE_DESCRIPTOR USB_DeviceDesc
   .bNumConfigurations = 0x01
 };
 
-TUSB_ATTR_RAM_SECTION ATTR_ALIGNED(4) const USB_FS_CONFIGURATION_DESCRIPTOR USB_FsConfigDescriptor =
+TUSB_CFG_ATTR_USBRAM ATTR_ALIGNED(4) const USB_FS_CONFIGURATION_DESCRIPTOR USB_FsConfigDescriptor =
 {
     .Config =
     {
@@ -358,7 +358,7 @@ TUSB_ATTR_RAM_SECTION ATTR_ALIGNED(4) const USB_FS_CONFIGURATION_DESCRIPTOR USB_
     .ConfigDescTermination = 0,
 };
 
-TUSB_ATTR_RAM_SECTION ATTR_ALIGNED(4) const USB_STR_DESCRIPTOR USB_StringDescriptor =
+TUSB_CFG_ATTR_USBRAM ATTR_ALIGNED(4) const USB_STR_DESCRIPTOR USB_StringDescriptor =
 {
     .LangID = { .bLength = 0x04, .bDescriptorType = USB_STRING_DESCRIPTOR_TYPE },
     .strLangID= {0x0409}, // US English
diff --git a/demos/device/keyboard/tusb_config.h b/demos/device/keyboard/tusb_config.h
index a28701896..1d90033b3 100644
--- a/demos/device/keyboard/tusb_config.h
+++ b/demos/device/keyboard/tusb_config.h
@@ -79,7 +79,7 @@
     #define TUSB_RAM_SECTION  ".data.$RAM3"
   #endif
 
-  #define TUSB_ATTR_RAM_SECTION   __attribute__ ((section(TUSB_RAM_SECTION)))
+  #define TUSB_CFG_ATTR_USBRAM   __attribute__ ((section(TUSB_RAM_SECTION)))
 #endif
 
 
diff --git a/demos/host/tusb_config.h b/demos/host/tusb_config.h
index 52e2506cf..e30751423 100644
--- a/demos/host/tusb_config.h
+++ b/demos/host/tusb_config.h
@@ -57,6 +57,12 @@
 
 #define TUSB_CFG_HOST
 
+#define TUSB_CFG_HOST_CONTROLLER_NUM 1
+#define TUSB_CFG_HOST_DEVICE_MAX 1
+#define TUSB_CFG_CONFIGURATION_MAX 1
+
+#define TUSB_CFG_HOST_HID_KEYBOARD
+
 /// Enable Device Support
 //#define TUSB_CFG_DEVICE
 
@@ -80,7 +86,7 @@
     #define TUSB_RAM_SECTION  ".data.$RAM3"
   #endif
 
-  #define TUSB_ATTR_RAM_SECTION   __attribute__ ((section(TUSB_RAM_SECTION)))
+  #define TUSB_CFG_ATTR_USBRAM   __attribute__ ((section(TUSB_RAM_SECTION)))
 #endif
 
 
diff --git a/tests/test/host/test_hid_host_keyboard.c b/tests/test/host/test_hid_host_keyboard.c
index 679916900..f0d82aa77 100644
--- a/tests/test/host/test_hid_host_keyboard.c
+++ b/tests/test/host/test_hid_host_keyboard.c
@@ -41,7 +41,7 @@
 #include "mock_osal.h"
 #include "mock_usbd_host.h"
 
-usbh_device_info_t usbh_device_pool [2];
+extern class_hid_keyboard_info_t keyboard_info_pool[TUSB_CFG_HOST_DEVICE_MAX];
 
 tusb_keyboard_report_t sample_key[2] =
 {
@@ -56,72 +56,122 @@ tusb_keyboard_report_t sample_key[2] =
 };
 
 tusb_handle_device_t device_hdl;
+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
+  instance_num = 0;
   memset(&report, 0, sizeof(tusb_keyboard_report_t));
 
-  usbh_device_pool[0].configuration.classes.hid_keyboard.pipe_in = 1;
-  usbh_device_pool[0].configuration.classes.hid_keyboard.qid = 1;
+  keyboard_info_pool[0].instance[0].pipe_in = 1;
+  keyboard_info_pool[0].instance[0].report_size = sizeof(tusb_keyboard_report_t);
+
+  kbd_descriptor = ((tusb_descriptor_interface_t)
+      {
+        .bLength            = sizeof(tusb_descriptor_interface_t),
+        .bDescriptorType    = TUSB_DESC_INTERFACE,
+        .bInterfaceNumber   = 1,
+        .bAlternateSetting  = 0,
+        .bNumEndpoints      = 1,
+        .bInterfaceClass    = TUSB_CLASS_HID,
+        .bInterfaceSubClass = TUSB_HID_SUBCLASS_BOOT,
+        .bInterfaceProtocol = TUSB_HID_PROTOCOL_KEYBOARD,
+        .iInterface         = 0
+      });
+
 }
 
 void tearDown(void)
 {
 }
 
-tusb_error_t queue_get_stub(osal_queue_id_t qid, uint32_t *data, osal_timeout_t msec, int num_call)
+//--------------------------------------------------------------------+
+// keyboard_install, keyboard_no_instances
+//--------------------------------------------------------------------+
+void test_keyboard_install_invalid_para(void)
 {
-  memcpy(data, (uint32_t*)(&sample_key[num_call/2]) + (num_call%2), 4);
-  return TUSB_ERROR_NONE;
+  TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, class_hid_keyboard_install(TUSB_CFG_HOST_DEVICE_MAX, (uint8_t*) &kbd_descriptor));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, class_hid_keyboard_install(device_hdl, NULL));
 }
 
-usbh_device_info_t* get_device_class_not_support_stub(tusb_handle_device_t device_hdl, int num_call)
+void test_keyboard_no_instances_invalid_para(void)
 {
-  usbh_device_pool[0].configuration.classes.hid_keyboard.pipe_in = 0;
-  usbh_device_pool[0].configuration.classes.hid_keyboard.qid = 0;
-
-  return &(usbh_device_pool[0]);
+  TEST_ASSERT_EQUAL(0, tusbh_hid_keyboard_no_instances(TUSB_CFG_HOST_DEVICE_MAX));
 }
 
-usbh_device_info_t* get_device_stub(tusb_handle_device_t device_hdl, int num_call)
+void test_keyboard_install_ok(void)
 {
-  return &(usbh_device_pool[0]);
+  TEST_ASSERT_EQUAL(0, tusbh_hid_keyboard_no_instances(device_hdl));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, class_hid_keyboard_install(device_hdl, (uint8_t*) &kbd_descriptor));
+  TEST_ASSERT_EQUAL(1, tusbh_hid_keyboard_no_instances(device_hdl));
+}
+
+//--------------------------------------------------------------------+
+// keyboard_get
+//--------------------------------------------------------------------+
+pipe_status_t pipe_status_get_stub(pipe_handle_t pipe_hdl, int num_call)
+{
+  switch (num_call)
+  {
+    case 0:
+      memcpy(keyboard_info_pool[0].instance[0].buffer, &sample_key[0], sizeof(tusb_keyboard_report_t));
+      return PIPE_STATUS_COMPLETE;
+    break;
+
+    case 1:
+      return PIPE_STATUS_AVAILABLE;
+    break;
+
+    case 2:
+      return PIPE_STATUS_BUSY;
+    break;
+
+    case 3:
+      memcpy(keyboard_info_pool[0].instance[0].buffer, &sample_key[1], sizeof(tusb_keyboard_report_t));
+      return PIPE_STATUS_COMPLETE;
+    break;
+
+    default:
+      return PIPE_STATUS_AVAILABLE;
+  }
 }
 
 void test_keyboard_get_invalid_para()
 {
-  usbh_device_info_get_IgnoreAndReturn(NULL);
-  TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, tusbh_keyboard_get(device_hdl, NULL));
-  TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, tusbh_keyboard_get(device_hdl, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, tusbh_hid_keyboard_get(0, 0, NULL));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, tusbh_hid_keyboard_get(TUSB_CFG_HOST_DEVICE_MAX, 0, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_INVALID_PARA, tusbh_hid_keyboard_get(0, TUSB_CFG_HOST_HID_KEYBOARD_NO_INSTANCES_PER_DEVICE, &report));
 }
 
 void test_keyboard_get_class_not_supported()
 {
-  usbh_device_info_get_StubWithCallback(get_device_class_not_support_stub);
-
-  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DEVICE_DONT_SUPPORT, tusbh_keyboard_get(device_hdl, &report));
+  keyboard_info_pool[device_hdl].instance[0].pipe_in = 0;
+  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DEVICE_DONT_SUPPORT, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
 }
 
-void test_keyboard_get_from_empty_queue()
+void test_keyboard_get_report_not_available()
 {
-  usbh_device_info_get_StubWithCallback(get_device_stub);
-  osal_queue_get_IgnoreAndReturn(TUSB_ERROR_OSAL_TIMEOUT);
-//  osal_queue_get_ExpectAndReturn( usbh_device_pool[0].configuration[0].classes.hid_keyboard.qid, );
+  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_OSAL_TIMEOUT, tusbh_keyboard_get(device_hdl, &report));
+  usbh_pipe_status_get_IgnoreAndReturn(PIPE_STATUS_AVAILABLE);
+  TEST_ASSERT_EQUAL(TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
 }
 
 void test_keyboard_get_ok()
 {
-  usbh_device_info_get_StubWithCallback(get_device_stub);
-  osal_queue_get_StubWithCallback(queue_get_stub);
+  usbh_pipe_status_get_StubWithCallback(pipe_status_get_stub);
 
-  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, tusbh_keyboard_get(device_hdl, &report));
+  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
   TEST_ASSERT_EQUAL_MEMORY(&sample_key[0], &report, sizeof(tusb_keyboard_report_t));
 
-  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, tusbh_keyboard_get(device_hdl, &report));
+  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(device_hdl, instance_num, &report));
+
+  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, tusbh_hid_keyboard_get(device_hdl, instance_num, &report));
   TEST_ASSERT_EQUAL_MEMORY(&sample_key[1], &report, sizeof(tusb_keyboard_report_t));
 }
 
diff --git a/tests/test/support/tusb_config.h b/tests/test/support/tusb_config.h
index 04d29d849..c02f12d66 100644
--- a/tests/test/support/tusb_config.h
+++ b/tests/test/support/tusb_config.h
@@ -55,23 +55,36 @@
  extern "C" {
 #endif
 
+//--------------------------------------------------------------------+
+// HOST CONFIGURATION
+//--------------------------------------------------------------------+
 #define TUSB_CFG_HOST
+
+//------------- CORE/CONTROLLER -------------//
 #define TUSB_CFG_HOST_CONTROLLER_NUM 2
 #define TUSB_CFG_HOST_DEVICE_MAX 2
 #define TUSB_CFG_CONFIGURATION_MAX 2
 
-/// Enable Device Support
+//------------- CLASS -------------//
+#define TUSB_CFG_HOST_HID_KEYBOARD  1
+#define TUSB_CFG_HOST_HID_KEYBOARD_ENDPOINT_SIZE  64
+
+//--------------------------------------------------------------------+
+// DEVICE CONFIGURATION
+//--------------------------------------------------------------------+
 //#define TUSB_CFG_DEVICE
 
-/// Enable CDC Support
+//------------- CORE/CONTROLLER -------------//
+
+//------------- CLASS -------------//
 //#define TUSB_CFG_DEVICE_CDC
-
-/// Enable HID Keyboard support
 #define TUSB_CFG_DEVICE_HID_KEYBOARD
-
-/// Enable HID Mouse support
 //#define TUSB_CFG_DEVICE_HID_MOUSE
 
+//--------------------------------------------------------------------+
+// COMMON CONFIGURATION
+//--------------------------------------------------------------------+
+
 #define TUSB_CFG_DEBUG 3
 
 #define TUSB_CFG_OS TUSB_OS_NONE
@@ -83,7 +96,7 @@
     #define TUSB_RAM_SECTION  ".data.$RAM3"
   #endif
 
-  #define TUSB_ATTR_RAM_SECTION   __attribute__ ((section(TUSB_RAM_SECTION)))
+  #define TUSB_CFG_ATTR_USBRAM   __attribute__ ((section(TUSB_RAM_SECTION)))
 #endif
 
 
diff --git a/tests/test/test_osal_none.c b/tests/test/test_osal_none.c
new file mode 100644
index 000000000..295a6d40a
--- /dev/null
+++ b/tests/test/test_osal_none.c
@@ -0,0 +1,56 @@
+/*
+ * test_osal_none.c
+ *
+ *  Created on: Jan 22, 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 "unity.h"
+#include "osal_none.h"
+
+void setUp(void)
+{
+
+}
+
+void tearDown(void)
+{
+
+}
+
+void test_queue_put_invalid_para(void)
+{
+//  osal_queue_put();
+}
+
+
diff --git a/tests/test/test_project_settings.c b/tests/test/test_project_settings.c
index 4f1062a1c..79e3d426d 100644
--- a/tests/test/test_project_settings.c
+++ b/tests/test/test_project_settings.c
@@ -45,7 +45,7 @@ void tearDown(void)
 {
 }
 
-void test_()
+void test_project_memory()
 {
-  TEST_IGNORE();
+  TEST_IGNORE_MESSAGE("Try to keep project total memory usage up-to-date");
 }
diff --git a/tinyusb/class/hid.h b/tinyusb/class/hid.h
index 8b3696114..cf9a47278 100644
--- a/tinyusb/class/hid.h
+++ b/tinyusb/class/hid.h
@@ -55,19 +55,18 @@
  extern "C" {
 #endif
 
- // TODO refractor
 #include "common/common.h"
 
-#ifdef TUSB_CFG_DEVICE
-  #include "device/dcd.h"
-  #include "hid_device.h"
-#endif
-
-#ifdef TUSB_CFG_HOST
-  #include "host/usbd_host.h"
-  #include "hid_host.h"
-#endif
+enum {
+  TUSB_HID_SUBCLASS_NONE = 0,
+  TUSB_HID_SUBCLASS_BOOT = 1
+};
 
+enum {
+  TUSB_HID_PROTOCOL_NONE     = 0,
+  TUSB_HID_PROTOCOL_KEYBOARD = 1,
+  TUSB_HID_PROTOCOL_MOUSE    = 2
+};
 /** \struct tusb_mouse_report_t
  *  \brief Standard HID Boot Protocol Mouse Report.
  *
diff --git a/tinyusb/class/hid_host.c b/tinyusb/class/hid_host.c
index 21bc1a93b..2d146a29a 100644
--- a/tinyusb/class/hid_host.c
+++ b/tinyusb/class/hid_host.c
@@ -39,28 +39,56 @@
 
 #if defined TUSB_CFG_HOST && defined DEVICE_CLASS_HID
 
+//--------------------------------------------------------------------+
+// INCLUDE
+//--------------------------------------------------------------------+
 #include "hid_host.h"
 
-tusb_error_t tusbh_keyboard_get(tusb_handle_device_t const device_hdl, tusb_keyboard_report_t * const report)
-{
-  usbh_device_info_t *p_device_info;
+//--------------------------------------------------------------------+
+// MACRO CONSTANT TYPEDEF
+//--------------------------------------------------------------------+
 
-  pipe_handle_t pipe_in;
-  osal_queue_id_t qid;
+//--------------------------------------------------------------------+
+// INTERNAL OBJECT & FUNCTION DECLARATION
+//--------------------------------------------------------------------+
+class_hid_keyboard_info_t keyboard_info_pool[TUSB_CFG_HOST_DEVICE_MAX];
+
+
+//--------------------------------------------------------------------+
+// IMPLEMENTATION
+//--------------------------------------------------------------------+
+tusb_error_t tusbh_hid_keyboard_get(tusb_handle_device_t const device_hdl, uint8_t instance_num, tusb_keyboard_report_t * const report)
+{
+  keyboard_interface_t *p_kbd;
 
   ASSERT_PTR(report, TUSB_ERROR_INVALID_PARA);
-  p_device_info = usbh_device_info_get(device_hdl);
-  ASSERT_PTR(p_device_info, TUSB_ERROR_INVALID_PARA);
+  ASSERT(device_hdl < TUSB_CFG_HOST_DEVICE_MAX, TUSB_ERROR_INVALID_PARA);
+  ASSERT(instance_num < TUSB_CFG_HOST_HID_KEYBOARD_NO_INSTANCES_PER_DEVICE, TUSB_ERROR_INVALID_PARA);
 
-  pipe_in = p_device_info->configuration.classes.hid_keyboard.pipe_in;
-  qid     = p_device_info->configuration.classes.hid_keyboard.qid;
+  p_kbd = &keyboard_info_pool[device_hdl].instance[instance_num];
 
-  ASSERT(0 != pipe_in, TUSB_ERROR_CLASS_DEVICE_DONT_SUPPORT);
-  ASSERT_STATUS( osal_queue_get(qid, (uint32_t*)report, OSAL_TIMEOUT_WAIT_FOREVER) );
-  ASSERT_STATUS( osal_queue_get(qid, ((uint32_t*)report)+1, OSAL_TIMEOUT_WAIT_FOREVER) );
+  ASSERT(0 != p_kbd->pipe_in, TUSB_ERROR_CLASS_DEVICE_DONT_SUPPORT);
+
+  ASSERT_INT(PIPE_STATUS_COMPLETE, usbh_pipe_status_get(p_kbd->pipe_in), TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE);
+
+  memcpy(report, p_kbd->buffer, p_kbd->report_size);
 
   return TUSB_ERROR_NONE;
 }
 
+uint8_t tusbh_hid_keyboard_no_instances(tusb_handle_device_t const device_hdl)
+{
+  return 0;
+}
+
+tusb_error_t class_hid_keyboard_install(uint8_t const dev_addr, uint8_t const *descriptor)
+{
+  ASSERT(dev_addr < TUSB_CFG_HOST_DEVICE_MAX, TUSB_ERROR_INVALID_PARA);
+  ASSERT_PTR(descriptor, TUSB_ERROR_INVALID_PARA);
+
+  return TUSB_ERROR_NONE;
+}
+
+
 #endif
 
diff --git a/tinyusb/class/hid_host.h b/tinyusb/class/hid_host.h
index 7a8c9887e..0dab9f08b 100644
--- a/tinyusb/class/hid_host.h
+++ b/tinyusb/class/hid_host.h
@@ -55,9 +55,30 @@
  extern "C" {
 #endif
 
+#include "host/usbd_host.h"
 #include "hid.h"
 
-tusb_error_t tusbh_keyboard_get(tusb_handle_device_t const handle, tusb_keyboard_report_t * const report);
+//--------------------------------------------------------------------+
+// APPLICATION API
+//--------------------------------------------------------------------+
+uint8_t tusbh_hid_keyboard_no_instances(tusb_handle_device_t const device_hdl);
+tusb_error_t tusbh_hid_keyboard_get(tusb_handle_device_t const handle, uint8_t instance_num, tusb_keyboard_report_t * const report);
+
+//--------------------------------------------------------------------+
+// INTERNAL API
+//--------------------------------------------------------------------+
+typedef struct {
+  pipe_handle_t pipe_in;
+  uint8_t report_size;
+  uint8_t buffer[TUSB_CFG_HOST_HID_KEYBOARD_ENDPOINT_SIZE];
+}keyboard_interface_t;
+
+typedef struct { // TODO internal structure
+  uint8_t instance_count;
+  keyboard_interface_t instance[TUSB_CFG_HOST_HID_KEYBOARD_NO_INSTANCES_PER_DEVICE];
+} class_hid_keyboard_info_t;
+
+tusb_error_t class_hid_keyboard_install(uint8_t const dev_addr, uint8_t const *descriptor);
 
 #ifdef __cplusplus
 }
diff --git a/tinyusb/common/errors.h b/tinyusb/common/errors.h
index bf1998365..3b37154d3 100644
--- a/tinyusb/common/errors.h
+++ b/tinyusb/common/errors.h
@@ -62,6 +62,7 @@
     ENTRY(TUSB_ERROR_NONE)\
     ENTRY(TUSB_ERROR_INVALID_PARA)\
     ENTRY(TUSB_ERROR_CLASS_DEVICE_DONT_SUPPORT)\
+    ENTRY(TUSB_ERROR_CLASS_DATA_NOT_AVAILABLE)\
     ENTRY(TUSB_ERROR_OSAL_TIMEOUT)\
     ENTRY(TUSB_ERROR_FAILED)\
 
diff --git a/tinyusb/device/dcd.c b/tinyusb/device/dcd.c
index 3ddcea147..3ec2b951c 100644
--- a/tinyusb/device/dcd.c
+++ b/tinyusb/device/dcd.c
@@ -42,7 +42,7 @@
 #include "descriptors.h" // TODO refractor later
 
 #define USB_ROM_SIZE (1024*2) // TODO dcd abstract later
-uint8_t usb_RomDriver_buffer[USB_ROM_SIZE] ATTR_ALIGNED(2048) TUSB_ATTR_RAM_SECTION;
+uint8_t usb_RomDriver_buffer[USB_ROM_SIZE] ATTR_ALIGNED(2048) TUSB_CFG_ATTR_USBRAM;
 USBD_HANDLE_T g_hUsb;
 static volatile bool isConfigured = false;
 
diff --git a/tinyusb/host/usbd_host.c b/tinyusb/host/usbd_host.c
index f39ecf799..772503d28 100644
--- a/tinyusb/host/usbd_host.c
+++ b/tinyusb/host/usbd_host.c
@@ -39,6 +39,8 @@
 
 #ifdef TUSB_CFG_HOST
 
+usbh_device_info_t usbh_device_pool[TUSB_CFG_HOST_DEVICE_MAX];
+
 #if 0
 tusb_error_t tusbh_keyboard_open(tusb_handle_device_t device_hdl, uint8_t configure_num, tusb_handle_keyboard_t *keyboard_hdl)
 {
@@ -50,6 +52,5 @@ tusb_error_t tusbh_keyboard_open(tusb_handle_device_t device_hdl, uint8_t config
 }
 #endif
 
-usbh_device_info_t usbh_device_pool[TUSB_CFG_HOST_DEVICE_MAX];
 
 #endif
diff --git a/tinyusb/host/usbd_host.h b/tinyusb/host/usbd_host.h
index 926d586b0..828e81890 100644
--- a/tinyusb/host/usbd_host.h
+++ b/tinyusb/host/usbd_host.h
@@ -57,24 +57,53 @@
 
 #include "hcd.h"
 
-typedef struct {
-  pipe_handle_t pipe_in;
-  osal_queue_id_t qid;
-}hid_info_t;
+enum {
+  TUSB_FLAGS_CLASS_UNSPECIFIED          = BIT_(0)    , ///< 0
+  TUSB_FLAGS_CLASS_AUDIO                = BIT_(1)    , ///< 1
+  TUSB_FLAGS_CLASS_CDC                  = BIT_(2)    , ///< 2
+  TUSB_FLAGS_CLASS_HID_GENERIC          = BIT_(3)    , ///< 3
+  TUSB_FLAGS_CLASS_RESERVED_4           = BIT_(4)    , ///< 4
+  TUSB_FLAGS_CLASS_PHYSICAL             = BIT_(5)    , ///< 5
+  TUSB_FLAGS_CLASS_IMAGE                = BIT_(6)    , ///< 6
+  TUSB_FLAGS_CLASS_PRINTER              = BIT_(7)    ,  ///< 7
+  TUSB_FLAGS_CLASS_MSC                  = BIT_(8)    ,  ///< 8
+  TUSB_FLAGS_CLASS_HUB                  = BIT_(9)    ,  ///< 9
+  TUSB_FLAGS_CLASS_CDC_DATA             = BIT_(10)   ,  ///< 10
+  TUSB_FLAGS_CLASS_SMART_CARD           = BIT_(11)   ,  ///< 11
+  TUSB_FLAGS_CLASS_RESERVED_12          = BIT_(12)   , ///< 12
+  TUSB_FLAGS_CLASS_CONTENT_SECURITY     = BIT_(13)   ,  ///< 13
+  TUSB_FLAGS_CLASS_VIDEO                = BIT_(14)   ,  ///< 14
+  TUSB_FLAGS_CLASS_PERSONAL_HEALTHCARE  = BIT_(15)   ,  ///< 15
+  TUSB_FLAGS_CLASS_AUDIO_VIDEO          = BIT_(16)   ,  ///< 16
+  // reserved from 17 to 20
+  TUSB_FLAGS_CLASS_RESERVED_20          = BIT_(20)    , ///< 3
+
+  TUSB_FLAGS_CLASS_HID_KEYBOARD         = BIT_(21)    , ///< 3
+  TUSB_FLAGS_CLASS_HID_MOUSE            = BIT_(22)    , ///< 3
+
+  // reserved from 25 to 26
+  TUSB_FLAGS_CLASS_RESERVED_25          = BIT_(25)    , ///< 3
+  TUSB_FLAGS_CLASS_RESERVED_26          = BIT_(26)    , ///< 3
+
+  TUSB_FLAGS_CLASS_DIAGNOSTIC           = BIT_(27),
+  TUSB_FLAGS_CLASS_WIRELESS_CONTROLLER  = BIT_(28),
+  TUSB_FLAGS_CLASS_MISC                 = BIT_(29),
+  TUSB_FLAGS_CLASS_APPLICATION_SPECIFIC = BIT_(30),
+  TUSB_FLAGS_CLASS_VENDOR_SPECIFIC      = BIT_(31)
+};
+
+typedef uint32_t tusbh_flag_class_t;
 
 typedef struct {
-  uint8_t interface_num;
+  uint8_t interface_count;
   uint8_t attributes;
-
-  struct {
-    hid_info_t hid_keyboard;
-    //      hid_info_t hid_mouse;
-    //      hid_info_t hid_generic;
-  } classes;
 } usbh_configure_info_t;
 
 typedef struct {
   uint8_t core_id;
+  pipe_handle_t pipe_control;
+  uint8_t configure_count;
+
 #if 0 // TODO allow configure for vendor/product
   uint16_t vendor_id;
   uint16_t product_id;
@@ -83,8 +112,11 @@ typedef struct {
   usbh_configure_info_t configuration;
 } usbh_device_info_t;
 
-
-
+typedef enum {
+  PIPE_STATUS_AVAILABLE = 0,
+  PIPE_STATUS_BUSY,
+  PIPE_STATUS_COMPLETE
+} pipe_status_t;
 //--------------------------------------------------------------------+
 // Structures & Types
 //--------------------------------------------------------------------+
@@ -93,6 +125,7 @@ typedef uint32_t tusb_handle_device_t;
 //--------------------------------------------------------------------+
 // APPLICATION API
 //--------------------------------------------------------------------+
+void         tusbh_device_mounting_cb (tusb_error_t error, tusb_handle_device_t device_hdl, uint32_t *configure_flags, uint8_t number_of_configure);
 void         tusbh_device_mounted_cb (tusb_error_t error, tusb_handle_device_t device_hdl, uint32_t *configure_flags, uint8_t number_of_configure);
 tusb_error_t tusbh_configuration_set     (tusb_handle_device_t const device_hdl, uint8_t const configure_number);
 
@@ -101,7 +134,8 @@ tusb_error_t tusbh_configuration_set     (tusb_handle_device_t const device_hdl,
 //--------------------------------------------------------------------+
 // CLASS API
 //--------------------------------------------------------------------+
-usbh_device_info_t* usbh_device_info_get (tusb_handle_device_t device_hdl);
+usbh_device_info_t*   usbh_device_info_get(tusb_handle_device_t device_hdl);
+pipe_status_t         usbh_pipe_status_get(pipe_handle_t pipe_hdl);
 
 #ifdef __cplusplus
  }
diff --git a/tinyusb/osal/osal.h b/tinyusb/osal/osal.h
index 07a65f5b2..2e3c2a2cf 100644
--- a/tinyusb/osal/osal.h
+++ b/tinyusb/osal/osal.h
@@ -81,6 +81,7 @@ enum
 //--------------------------------------------------------------------+
 typedef uint32_t osal_queue_id_t;
 
+tusb_error_t osal_queue_create(osal_queue_id_t qid, uint8_t *buffer);
 tusb_error_t osal_queue_put(osal_queue_id_t qid, uint32_t data, osal_timeout_t msec);
 tusb_error_t osal_queue_get(osal_queue_id_t qid, uint32_t *data, osal_timeout_t msec);
 
diff --git a/tinyusb/osal/osal_none.h b/tinyusb/osal/osal_none.h
index d14277f39..198e5dc2c 100644
--- a/tinyusb/osal/osal_none.h
+++ b/tinyusb/osal/osal_none.h
@@ -60,6 +60,17 @@
 //--------------------------------------------------------------------+
 // QUEUE API
 //--------------------------------------------------------------------+
+typedef struct{
+           uint8_t  *buf         ; ///< buffer pointer
+           uint16_t size         ; ///< buffer size
+  volatile uint16_t len          ; ///< bytes in fifo
+  volatile uint16_t wr_ptr       ; ///< write pointer
+  volatile uint16_t rd_ptr       ; ///< read pointer
+} osal_queue_t;
+
+#define OSAL_DEF_QUEUE(name, size)\
+  osal_queue_t name;\
+  uint8_t buffer_##name[size]
 
 #ifdef __cplusplus
  }
diff --git a/tinyusb/tusb.h b/tinyusb/tusb.h
index 91f8261c2..02a00d48d 100644
--- a/tinyusb/tusb.h
+++ b/tinyusb/tusb.h
@@ -51,24 +51,29 @@
 #include "common/common.h"
 
 #ifdef TUSB_CFG_HOST
-  #include "host/hcd.h"
+  #include "host/usbd_host.h"
+
+  #ifdef HOST_CLASS_HID
+    #include "class/hid_host.h"
+  #endif
 #endif
 
 #ifdef TUSB_CFG_DEVICE
   #include "device/dcd.h"
+
+  #if DEVICE_CLASS_HID
+    #include "class/hid_device.h"
+  #endif
+
+  #ifdef TUSB_CFG_DEVICE_CDC
+    #include "class/cdc.h"
+  #endif
 #endif
 
 #if !(defined TUSB_CFG_HOST) && !(defined TUSB_CFG_DEVICE)
  #error please enable either TUSB_CFG_HOST or TUSB_CFG_DEVICE
 #endif
 
-#if DEVICE_CLASS_HID
-  #include "class/hid.h"
-#endif
-
-#ifdef TUSB_CFG_DEVICE_CDC
-  #include "class/cdc.h"
-#endif
 
 tusb_error_t tusb_init(void);
 
diff --git a/tinyusb/tusb_option.h b/tinyusb/tusb_option.h
index 95ef840b6..f84836428 100644
--- a/tinyusb/tusb_option.h
+++ b/tinyusb/tusb_option.h
@@ -75,6 +75,19 @@
   #warning TUSB_CFG_HOST_DEVICE_MAX is not defined, default value is 1
 #endif
 
+#if TUSB_CFG_HOST_HID_KEYBOARD
+  #if !defined(TUSB_CFG_HOST_HID_KEYBOARD_ENDPOINT_SIZE)
+    #define TUSB_CFG_HOST_HID_KEYBOARD_ENDPOINT_SIZE 64
+    #warning TUSB_CFG_HOST_HID_KEYBOARD_ENDPOINT_SIZE is not defined, default value is 64
+  #elif TUSB_CFG_HOST_HID_KEYBOARD_ENDPOINT_SIZE < 8
+    #error no endpoint size is allowed to be less than 8
+  #endif
+
+  #if !defined(TUSB_CFG_HOST_HID_KEYBOARD_NO_INSTANCES_PER_DEVICE)
+    #define TUSB_CFG_HOST_HID_KEYBOARD_NO_INSTANCES_PER_DEVICE 1
+  #endif
+#endif
+
 #endif
 
 #ifndef TUSB_CFG_CONFIGURATION_MAX
@@ -86,13 +99,15 @@
 //#define TUSB_CFG_DEVICE
 
 /// USB RAM Section Placement, MCU's usb controller often has limited access to specific RAM region. This will be used to declare internal variables as follow:
-/// uint8_t tinyusb_data[10] TUSB_ATTR_RAM_SECTION;
-/// if your mcu's usb controller has no such limit, define TUSB_ATTR_RAM_SECTION as empty macro.
-#ifndef TUSB_ATTR_RAM_SECTION
- #error TUSB_ATTR_RAM_SECTION is not defined, needed to place data in accessible RAM for usb controller
+/// uint8_t tinyusb_data[10] TUSB_CFG_ATTR_USBRAM;
+/// if your mcu's usb controller has no such limit, define TUSB_CFG_ATTR_USBRAM as empty macro.
+#ifndef TUSB_CFG_ATTR_USBRAM
+ #error TUSB_CFG_ATTR_USBRAM is not defined, please help me know how to place data in accessible RAM for usb controller
 #endif
 
 #define DEVICE_CLASS_HID ( (defined TUSB_CFG_DEVICE_HID_KEYBOARD) || (defined TUSB_CFG_DEVICE_HID_MOUSE) )
+#define HOST_CLASS_HID   ( (defined TUSB_CFG_HOST_HID_KEYBOARD) )
+
 #define HOST_EHCI
 
 // TODO APP