diff --git a/tests/test/host/hid/test_hidh_keyboard.c b/tests/test/host/hid/test_hidh_keyboard.c
index 12f3d7e4b..3f915919a 100644
--- a/tests/test/host/hid/test_hidh_keyboard.c
+++ b/tests/test/host/hid/test_hidh_keyboard.c
@@ -108,24 +108,6 @@ void test_keyboard_no_instances_invalid_para(void)
   TEST_ASSERT_EQUAL(0, tusbh_hid_keyboard_no_instances(dev_addr));
 }
 
-void test_keyboard_open_ok(void)
-{
-  uint16_t length=0;
-  pipe_handle_t pipe_hdl = {.dev_addr = dev_addr, .xfer_type = TUSB_XFER_INTERRUPT, .index = 1};
-
-  hcd_pipe_open_ExpectAndReturn(dev_addr, p_kdb_endpoint_desc, TUSB_CLASS_HID, pipe_hdl);
-
-  //------------- Code Under TEST -------------//
-  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, hidh_keyboard_open_subtask(dev_addr, (uint8_t*) p_kbd_interface_desc, &length));
-
-  tusbh_device_get_state_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
-  TEST_ASSERT_EQUAL(2, tusbh_hid_keyboard_no_instances(dev_addr)); // init set instance number to 1
-  TEST_ASSERT_PIPE_HANDLE(pipe_hdl, p_hidh_kbd_interface->pipe_in);
-  TEST_ASSERT_EQUAL(8, p_hidh_kbd_interface->report_size);
-  TEST_ASSERT_EQUAL(sizeof(tusb_descriptor_interface_t) + sizeof(tusb_hid_descriptor_hid_t) + sizeof(tusb_descriptor_endpoint_t),
-                   length);
-}
-
 void test_keyboard_init(void)
 {
   hidh_keyboard_init();
@@ -134,6 +116,31 @@ void test_keyboard_init(void)
     TEST_ASSERT_EQUAL(0, ((uint8_t*)keyboard_data) [i]);
 }
 
+void test_keyboard_open_ok(void)
+{
+  uint16_t length=0;
+  pipe_handle_t pipe_hdl = {.dev_addr = dev_addr, .xfer_type = TUSB_XFER_INTERRUPT, .index = 2};
+  keyboard_interface_t* p_new_instance = &keyboard_data[dev_addr-1].instance[instance_num+1];
+
+  hcd_pipe_open_ExpectAndReturn(dev_addr, p_kdb_endpoint_desc, TUSB_CLASS_HID, pipe_hdl);
+
+  //------------- Code Under TEST -------------//
+  TEST_ASSERT_EQUAL(TUSB_ERROR_NONE, hidh_keyboard_open_subtask(dev_addr, (uint8_t*) p_kbd_interface_desc, &length));
+
+  TEST_ASSERT_PIPE_HANDLE(pipe_hdl, p_new_instance->pipe_in);
+  TEST_ASSERT_EQUAL(8, p_new_instance->report_size);
+  TEST_ASSERT_EQUAL(sizeof(tusb_descriptor_interface_t) + sizeof(tusb_hid_descriptor_hid_t) + sizeof(tusb_descriptor_endpoint_t),
+                   length);
+
+  tusbh_device_get_state_IgnoreAndReturn(TUSB_DEVICE_STATE_CONFIGURED);
+  TEST_ASSERT_EQUAL(2, tusbh_hid_keyboard_no_instances(dev_addr)); // init set instance number to 1
+}
+
+void test_keyboard_close(void)
+{
+
+}
+
 //--------------------------------------------------------------------+
 // keyboard_get
 //--------------------------------------------------------------------+
diff --git a/tinyusb/class/hid_host_keyboard.c b/tinyusb/class/hid_host_keyboard.c
index f37ca3507..984a427d4 100644
--- a/tinyusb/class/hid_host_keyboard.c
+++ b/tinyusb/class/hid_host_keyboard.c
@@ -101,27 +101,39 @@ void hidh_keyboard_init(void)
 
 tusb_error_t hidh_keyboard_open_subtask(uint8_t dev_addr, uint8_t const *descriptor, uint16_t *p_length)
 {
+  keyboard_interface_t *p_keyboard = get_kbd_instance(dev_addr, keyboard_data[dev_addr-1].instance_count);
   uint8_t const *p_desc = descriptor;
 
   p_desc += p_desc[DESCRIPTOR_OFFSET_LENGTH]; // skip interface
-  p_desc += p_desc[DESCRIPTOR_OFFSET_LENGTH]; // TODO skip HID, only support std keyboard
+  (*p_length) = p_desc - descriptor; // set ASAP, in case of error, p_length has to be not zero to prevent infinite re-open
 
-  // set ASAP, in case of error, p_length has to be not zero to prevent infinite re-open
+  //------------- HID descriptor -------------//
+  tusb_hid_descriptor_hid_t* const p_desc_hid = (tusb_hid_descriptor_hid_t* const) p_desc;
+  ASSERT_INT(HID_DESC_HID, p_desc_hid->bDescriptorType, TUSB_ERROR_INVALID_PARA);
+
+  p_desc += p_desc[DESCRIPTOR_OFFSET_LENGTH]; // TODO skip HID, only support std keyboard
   (*p_length) = p_desc - descriptor;
 
-  keyboard_interface_t *p_kbd = get_kbd_instance(dev_addr, keyboard_data[dev_addr-1].instance_count);
-
+  //------------- Endpoint Descriptor -------------//
   ASSERT_INT(TUSB_DESC_ENDPOINT, p_desc[DESCRIPTOR_OFFSET_TYPE], TUSB_ERROR_INVALID_PARA);
 
-  p_kbd->pipe_in = hcd_pipe_open(dev_addr, (tusb_descriptor_endpoint_t*) p_desc, TUSB_CLASS_HID);
+  p_keyboard->pipe_in = hcd_pipe_open(dev_addr, (tusb_descriptor_endpoint_t*) p_desc, TUSB_CLASS_HID);
+
+  p_keyboard->report_size =  ( ((tusb_descriptor_endpoint_t*) p_desc)->wMaxPacketSize & (BIT_(12)-1) );
 
   p_desc += p_desc[DESCRIPTOR_OFFSET_LENGTH]; // advance endpoint descriptor
   (*p_length) = p_desc - descriptor;
 
-  ASSERT (pipehandle_is_valid(p_kbd->pipe_in), TUSB_ERROR_HCD_FAILED);
+  ASSERT (pipehandle_is_valid(p_keyboard->pipe_in), TUSB_ERROR_HCD_FAILED);
+
   keyboard_data[dev_addr-1].instance_count++;
 
   return TUSB_ERROR_NONE;
 }
 
+void hidh_keyboard_close(uint8_t dev_addr)
+{
+
+}
+
 #endif
diff --git a/tinyusb/class/hid_host_keyboard.h b/tinyusb/class/hid_host_keyboard.h
index f07595dcf..4c5b19ac9 100644
--- a/tinyusb/class/hid_host_keyboard.h
+++ b/tinyusb/class/hid_host_keyboard.h
@@ -88,7 +88,6 @@ typedef struct {
 } hidh_keyboard_info_t;
 
 void         hidh_keyboard_init(void);
-tusb_error_t hidh_keyboard_install(uint8_t dev_addr, uint8_t const *descriptor) ATTR_WARN_UNUSED_RESULT;
 tusb_error_t hidh_keyboard_open_subtask(uint8_t dev_addr, uint8_t const *descriptor, uint16_t *p_length) ATTR_WARN_UNUSED_RESULT;
 void         hidh_keyboard_close(uint8_t dev_addr);