diff --git a/hw/mcu/nxp/lpc43xx/tusb_port/dcd_lpc43xx.c b/hw/mcu/nxp/lpc43xx/tusb_port/dcd_lpc43xx.c
index f0952927..2ec14a4a 100644
--- a/hw/mcu/nxp/lpc43xx/tusb_port/dcd_lpc43xx.c
+++ b/hw/mcu/nxp/lpc43xx/tusb_port/dcd_lpc43xx.c
@@ -406,8 +406,8 @@ void xfer_complete_isr(uint8_t port, uint32_t reg_complete)
 
         if (p_qtd->int_on_complete)
         {
-          tusb_event_t event = ( p_qtd->xact_err || p_qtd->halted || p_qtd->buffer_err ) ? TUSB_EVENT_XFER_ERROR : TUSB_EVENT_XFER_COMPLETE;
-          usbd_xfer_isr(edpt_hdl, event, p_qtd->expected_bytes - p_qtd->total_bytes); // only number of bytes in the IOC qtd
+          bool succeeded = ( p_qtd->xact_err || p_qtd->halted || p_qtd->buffer_err ) ? false : true;
+          tusb_dcd_xfer_complete(edpt_hdl, p_qtd->expected_bytes - p_qtd->total_bytes, succeeded); // only number of bytes in the IOC qtd
         }
       }
     }
@@ -481,9 +481,9 @@ void hal_dcd_isr(uint8_t port)
                 .port = port,
                 .index = 0,
             };
-            tusb_event_t event = ( p_qtd->xact_err || p_qtd->halted || p_qtd->buffer_err ) ? TUSB_EVENT_XFER_ERROR : TUSB_EVENT_XFER_COMPLETE;
+            bool succeeded = ( p_qtd->xact_err || p_qtd->halted || p_qtd->buffer_err ) ? false : true;
 
-            usbd_xfer_isr(edpt_hdl, event, 0); // TODO xferred bytes for control xfer is not needed yet !!!!
+            tusb_dcd_xfer_complete(edpt_hdl, 0, succeeded); // TODO xferred bytes for control xfer is not needed yet !!!!
           }
         }
       }
diff --git a/tinyusb/device/dcd_lpc175x_6x.c b/tinyusb/device/dcd_lpc175x_6x.c
index 4328fbf1..274fc462 100644
--- a/tinyusb/device/dcd_lpc175x_6x.c
+++ b/tinyusb/device/dcd_lpc175x_6x.c
@@ -165,9 +165,9 @@ static void endpoint_non_control_isr(uint32_t eot_int)
               .index      = ep_id,
               .class_code = dcd_data.class_code[ep_id]
           };
-          tusb_event_t event = (p_last_dd->status == DD_STATUS_NORMAL || p_last_dd->status == DD_STATUS_DATA_UNDERUN) ? TUSB_EVENT_XFER_COMPLETE : TUSB_EVENT_XFER_ERROR;
+          bool succeeded = (p_last_dd->status == DD_STATUS_NORMAL || p_last_dd->status == DD_STATUS_DATA_UNDERUN) ? true : false;
 
-          usbd_xfer_isr(edpt_hdl, event, p_last_dd->present_count); // report only xferred bytes in the IOC qtd
+          tusb_dcd_xfer_complete(edpt_hdl, p_last_dd->present_count, succeeded); // report only xferred bytes in the IOC qtd
         }
       }
     }
@@ -208,7 +208,7 @@ static void endpoint_control_isr(void)
         dcd_data.control_dma.int_on_complete = 0;
 
         // FIXME xferred_byte for control xfer is not needed now !!!
-        usbd_xfer_isr(edpt_hdl, TUSB_EVENT_XFER_COMPLETE, 0);
+        tusb_dcd_xfer_complete(edpt_hdl, 0, true);
       }
     }
   }
diff --git a/tinyusb/device/dcd_lpc_11uxx_13uxx.c b/tinyusb/device/dcd_lpc_11uxx_13uxx.c
index 8a5691dc..559da4a0 100644
--- a/tinyusb/device/dcd_lpc_11uxx_13uxx.c
+++ b/tinyusb/device/dcd_lpc_11uxx_13uxx.c
@@ -256,7 +256,7 @@ static void endpoint_non_control_isr(uint32_t int_status)
           dcd_data.current_ioc = BIT_CLR_(dcd_data.current_ioc, edpt_hdl.index);
 
           // TODO no way determine if the transfer is failed or not
-          usbd_xfer_isr(edpt_hdl, TUSB_EVENT_XFER_COMPLETE, dcd_data.current_td[ep_id].xferred_total);
+          tusb_dcd_xfer_complete(edpt_hdl, dcd_data.current_td[ep_id].xferred_total, true);
         }
 
         //------------- Next TD is available -------------//
@@ -291,7 +291,7 @@ static void endpoint_control_isr(uint32_t int_status)
       dcd_data.current_ioc = BIT_CLR_(dcd_data.current_ioc, ep_id);
 
       // FIXME xferred_byte for control xfer is not needed now !!!
-      usbd_xfer_isr(edpt_hdl, TUSB_EVENT_XFER_COMPLETE, 0);
+      tusb_dcd_xfer_complete(edpt_hdl, 0, true);
     }
   }
 }
diff --git a/tinyusb/device/usbd.c b/tinyusb/device/usbd.c
index f090bc14..55bce562 100644
--- a/tinyusb/device/usbd.c
+++ b/tinyusb/device/usbd.c
@@ -498,7 +498,7 @@ void tusb_dcd_setup_received(uint8_t port, uint8_t const* p_request)
   osal_queue_send(usbd_queue_hdl, &task_event);
 }
 
-void usbd_xfer_isr(edpt_hdl_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes)
+void tusb_dcd_xfer_complete(edpt_hdl_t edpt_hdl, uint32_t xferred_bytes, bool succeeded)
 {
   if (edpt_hdl.index == 0 )
   {
@@ -508,9 +508,9 @@ void usbd_xfer_isr(edpt_hdl_t edpt_hdl, tusb_event_t event, uint32_t xferred_byt
   {
     usbd_task_event_t task_event =
     {
-        .port       = edpt_hdl.port,
+        .port         = edpt_hdl.port,
         .event_id     = USBD_EVENTID_XFER_DONE,
-        .sub_event_id = event
+        .sub_event_id = succeeded ? TUSB_EVENT_XFER_COMPLETE : TUSB_EVENT_XFER_ERROR
     };
 
     task_event.xfer_done.xferred_byte = xferred_bytes;
diff --git a/tinyusb/tusb_dcd.h b/tinyusb/tusb_dcd.h
index 2b7734f1..9e066646 100644
--- a/tinyusb/tusb_dcd.h
+++ b/tinyusb/tusb_dcd.h
@@ -75,10 +75,13 @@ void tusb_dcd_disconnect  (uint8_t port);
 void tusb_dcd_set_address (uint8_t port, uint8_t dev_addr);
 void tusb_dcd_set_config  (uint8_t port, uint8_t config_num);
 
-/*------------- Event function -------------*/
+/*------------------------------------------------------------------*/
+/* Event Function
+ * Called by DCD to notify USBD
+ *------------------------------------------------------------------*/
 void tusb_dcd_bus_event(uint8_t port, usbd_bus_event_type_t bus_event);
 void tusb_dcd_setup_received(uint8_t port, uint8_t const* p_request);
-void usbd_xfer_isr(edpt_hdl_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes);
+void tusb_dcd_xfer_complete(edpt_hdl_t edpt_hdl, uint32_t xferred_bytes, bool succeeded);
 
 //------------- PIPE API -------------//
 bool tusb_dcd_control_xfer(uint8_t port, tusb_direction_t dir, uint8_t * p_buffer, uint16_t length, bool int_on_complete);