add some test for usbh_hcd integration

- add tests for pipe_close  (while TDs are active)
- add tests for device unplugged
add tesst & implement the async_advance_isr to clean up "REMOVING" queue head
- add helper find previous qhd
- add remove qhd from async list
- add is_removing field for async advance isr to clean up
add pipe close for control pipe & bulk pipe (with tests)
add helper get qhd from pipe_handle

tests/test/host/ehci/test_ehci_isr.c

@@ -50,15 +50,17 @@
 usbh_device_info_t usbh_device_info_pool[TUSB_CFG_HOST_DEVICE_MAX+1];
 
 uint8_t hostid;
-
+ehci_registers_t * regs;
 void setUp(void)
 {
   memclr_(&lpc_usb0, sizeof(LPC_USB0_Type));
   memclr_(&lpc_usb1, sizeof(LPC_USB1_Type));
 
   hostid = RANDOM(CONTROLLER_HOST_NUMBER) + TEST_CONTROLLER_HOST_START_INDEX;
+  regs = get_operational_register(hostid);
 
   hcd_init();
+  regs->usb_sts = 0; // hcd_init clear usb_sts by writing 1s
 }
 
 void tearDown(void)
@@ -103,44 +105,5 @@ void test_isr_device_disconnect(void)
   //------------- Code Under Test -------------//
   hcd_isr(hostid);
 
-  ehci_registers_t * const regs = get_operational_register(hostid);
   TEST_ASSERT(regs->usb_cmd_bit.advacne_async);
 }
-
-void test_isr_disconnect_then_async_advance(void)
-{
-  uint8_t dev_addr = 1;
-  uint8_t hostid = 0;
-  ehci_registers_t * const regs = get_operational_register(hostid);
-
-//  usbh_device_info_pool[dev_addr].status = TUSB_DEVICE_STATUS_READY;
-  usbh_device_info_pool[dev_addr].core_id = hostid;
-  usbh_device_info_pool[dev_addr].hub_addr = 0;
-  usbh_device_info_pool[dev_addr].hub_port = 0;
-
-  hcd_pipe_control_open(dev_addr, 64);
-  hcd_pipe_control_xfer(dev_addr,
-                        &(tusb_std_request_t) {
-                              .bmRequestType = { .direction = TUSB_DIR_HOST_TO_DEV, .type = TUSB_REQUEST_TYPE_STANDARD, .recipient = TUSB_REQUEST_RECIPIENT_DEVICE },
-                              .bRequest = TUSB_REQUEST_SET_ADDRESS,
-                              .wValue   = 3 },
-                        NULL);
-
-  ehci_qhd_t *p_qhd = &ehci_data.device[dev_addr].control.qhd;
-  ehci_qtd_t *p_qtd_head = p_qhd->p_qtd_list_head;
-  ehci_qtd_t *p_qtd_tail = p_qhd->p_qtd_list_tail;
-
-  ehci_controller_device_unplug(hostid);
-  usbh_device_unplugged_isr_Expect(hostid);
-
-  //------------- Code Under Test -------------//
-  hcd_isr(hostid); // port change detect
-  regs->usb_sts_bit.port_change_detect = 0; // clear port change detect
-  hcd_isr(hostid); // async advance
-
-  TEST_ASSERT( align32(get_async_head(hostid)->next.address) != (uint32_t) p_qhd );
-  TEST_ASSERT_FALSE(p_qhd->used);
-  TEST_ASSERT_FALSE(p_qtd_head->used);
-  TEST_ASSERT_FALSE(p_qtd_tail->used);
-
-}

tests/test/host/ehci/test_ehci_pipe_open.c

@@ -109,6 +109,7 @@ void verify_open_qhd(ehci_qhd_t *p_qhd, uint8_t endpoint_addr, uint16_t max_pack
 
   //------------- HCD -------------//
   TEST_ASSERT(p_qhd->used);
+  TEST_ASSERT_FALSE(p_qhd->is_removing);
   TEST_ASSERT_NULL(p_qhd->p_qtd_list_head);
   TEST_ASSERT_NULL(p_qhd->p_qtd_list_tail);
 }
@@ -179,6 +180,34 @@ void test_control_open_non_highspeed(void)
   TEST_ASSERT_TRUE(p_qhd->non_hs_control_endpoint);
 }
 
+void test_control_addr0_close(void)
+{
+  ehci_qhd_t * const p_qhd = async_head;
+  dev_addr = 0;
+  hcd_pipe_control_open(dev_addr, control_max_packet_size);
+
+  //------------- Code Under Test -------------//
+  hcd_pipe_control_close(dev_addr);
+
+  TEST_ASSERT(p_qhd->head_list_flag);
+  TEST_ASSERT(p_qhd->is_removing);
+}
+
+void test_control_close(void)
+{
+  ehci_qhd_t * const p_qhd = &ehci_data.device[dev_addr].control.qhd;
+
+  hcd_pipe_control_open(dev_addr, control_max_packet_size);
+
+  //------------- Code Under TEST -------------//
+  hcd_pipe_control_close(dev_addr);
+  TEST_ASSERT(p_qhd->is_removing);
+  TEST_ASSERT(p_qhd->used);
+
+  TEST_ASSERT( align32(get_async_head(hostid)->next.address) != (uint32_t) p_qhd );
+  TEST_ASSERT_EQUAL( get_async_head(hostid), align32(p_qhd->next.address));
+}
+
 //--------------------------------------------------------------------+
 // BULK PIPE
 //--------------------------------------------------------------------+
@@ -234,6 +263,20 @@ void test_open_bulk_qhd_data(void)
   TEST_ASSERT_EQUAL(EHCI_QUEUE_ELEMENT_QHD, async_head->next.type);
 }
 
+void test_bulk_close(void)
+{
+  tusb_descriptor_endpoint_t const * desc_endpoint = &desc_ept_bulk_in;
+  pipe_handle_t pipe_hdl = hcd_pipe_open(dev_addr, desc_endpoint, TUSB_CLASS_MSC);
+  ehci_qhd_t *p_qhd = &ehci_data.device[ pipe_hdl.dev_addr ].qhd[ pipe_hdl.index ];
+
+  //------------- Code Under TEST -------------//
+  hcd_pipe_close(pipe_hdl);
+
+  TEST_ASSERT(p_qhd->is_removing);
+  TEST_ASSERT( align32(get_async_head(hostid)->next.address) != (uint32_t) p_qhd );
+  TEST_ASSERT_EQUAL_HEX( (uint32_t) get_async_head(hostid), align32(p_qhd->next.address ) );
+}
+
 //--------------------------------------------------------------------+
 // INTERRUPT PIPE
 //--------------------------------------------------------------------+

tests/test/host/ehci/test_ehci_pipe_xfer_control.c

@@ -244,7 +244,6 @@ void test_control_xfer_isr(void)
   usbh_isr_Expect(((pipe_handle_t){.dev_addr = dev_addr}), 0);
 
   //------------- Code Under TEST -------------//
-  printf("control head = %x\n", p_qhd);
   hcd_isr(hostid);
 
   TEST_ASSERT_NULL(p_qhd->p_qtd_list_head);

tests/test/host/ehci/test_ehci_usbh_hcd_integration.c

@@ -0,0 +1,180 @@
+/*
+ * test_usbh_hcd_integration.c
+ *
+ *  Created on: Mar 13, 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 "tusb_option.h"
+#include "errors.h"
+#include "binary.h"
+
+#include "hal.h"
+#include "mock_osal.h"
+#include "hcd.h"
+#include "usbh_hcd.h"
+#include "usbh.h"
+#include "ehci.h"
+#include "ehci_controller.h"
+
+#define _TINY_USB_SOURCE_FILE_
+usbh_device_info_t usbh_device_info_pool[TUSB_CFG_HOST_DEVICE_MAX+1];
+uint8_t const control_max_packet_size = 64;
+uint8_t hub_addr;
+uint8_t hub_port;
+uint8_t dev_addr;
+uint8_t hostid;
+ehci_registers_t * regs;
+ehci_qhd_t *async_head;
+ehci_qhd_t *period_head;
+
+void setUp(void)
+{
+  memclr_(&lpc_usb0, sizeof(LPC_USB0_Type));
+  memclr_(&lpc_usb1, sizeof(LPC_USB1_Type));
+  memclr_(usbh_device_info_pool, sizeof(usbh_device_info_t)*(TUSB_CFG_HOST_DEVICE_MAX+1));
+
+  hub_addr = hub_port = 0;
+  dev_addr = 1;
+
+  hostid = RANDOM(CONTROLLER_HOST_NUMBER) + TEST_CONTROLLER_HOST_START_INDEX;
+
+  hcd_init();
+
+  for (uint8_t i=0; i<TUSB_CFG_HOST_DEVICE_MAX; i++)
+  {
+    usbh_device_info_pool[i].core_id  = hostid;
+    usbh_device_info_pool[i].hub_addr = hub_addr;
+    usbh_device_info_pool[i].hub_port = hub_port;
+    usbh_device_info_pool[i].speed    = TUSB_SPEED_HIGH;
+  }
+
+  regs = get_operational_register(hostid);
+  async_head =  get_async_head( hostid );
+  period_head = get_period_head( hostid );
+  regs->usb_sts = 0; // hcd_init clear usb_sts by writing 1s
+}
+
+void tearDown(void)
+{
+}
+
+void test_addr0_control_close(void)
+{
+  dev_addr = 0;
+
+  hcd_pipe_control_open(dev_addr, 64);
+  hcd_pipe_control_xfer(dev_addr,
+                        &(tusb_std_request_t) {
+                              .bmRequestType = { .direction = TUSB_DIR_HOST_TO_DEV, .type = TUSB_REQUEST_TYPE_STANDARD, .recipient = TUSB_REQUEST_RECIPIENT_DEVICE },
+                              .bRequest = TUSB_REQUEST_SET_ADDRESS,
+                              .wValue   = 3 },
+                        NULL);
+
+  ehci_qhd_t *p_qhd = async_head;
+  hcd_pipe_control_close(dev_addr);
+
+  //------------- Code Under Test -------------//
+  regs->usb_sts_bit.port_change_detect = 0; // clear port change detect
+  regs->usb_sts_bit.async_advance = 1;
+  hcd_isr(hostid); // async advance
+
+  TEST_ASSERT( p_qhd->qtd_overlay.halted );
+  TEST_ASSERT_FALSE( p_qhd->is_removing );
+  TEST_ASSERT_NULL( p_qhd->p_qtd_list_head );
+  TEST_ASSERT_NULL( p_qhd->p_qtd_list_tail );
+}
+
+void test_isr_disconnect_then_async_advance_control_pipe(void)
+{
+  hcd_pipe_control_open(dev_addr, 64);
+  hcd_pipe_control_xfer(dev_addr,
+                        &(tusb_std_request_t) {
+                              .bmRequestType = { .direction = TUSB_DIR_HOST_TO_DEV, .type = TUSB_REQUEST_TYPE_STANDARD, .recipient = TUSB_REQUEST_RECIPIENT_DEVICE },
+                              .bRequest = TUSB_REQUEST_SET_ADDRESS,
+                              .wValue   = 3 },
+                        NULL);
+
+  ehci_qhd_t *p_qhd = &ehci_data.device[dev_addr].control.qhd;
+  ehci_qtd_t *p_qtd_head = p_qhd->p_qtd_list_head;
+  ehci_qtd_t *p_qtd_tail = p_qhd->p_qtd_list_tail;
+
+  ehci_controller_device_unplug(hostid);
+
+  //------------- Code Under Test -------------//
+  hcd_isr(hostid); // port change detect
+  regs->usb_sts_bit.port_change_detect = 0; // clear port change detect
+  regs->usb_sts_bit.async_advance = 1;
+  hcd_isr(hostid); // async advance
+
+  TEST_ASSERT_FALSE(p_qhd->used);
+  TEST_ASSERT_FALSE(p_qhd->is_removing);
+  TEST_ASSERT_NULL(p_qhd->p_qtd_list_head);
+  TEST_ASSERT_NULL(p_qhd->p_qtd_list_tail);
+}
+
+void test_bulk_pipe_close(void)
+{
+  tusb_descriptor_endpoint_t const desc_ept_bulk_in =
+  {
+      .bLength          = sizeof(tusb_descriptor_endpoint_t),
+      .bDescriptorType  = TUSB_DESC_ENDPOINT,
+      .bEndpointAddress = 0x81,
+      .bmAttributes     = { .xfer = TUSB_XFER_BULK },
+      .wMaxPacketSize   = 512,
+      .bInterval        = 0
+  };
+
+  uint8_t xfer_data[100];
+  pipe_handle_t pipe_hdl = hcd_pipe_open(dev_addr, &desc_ept_bulk_in, TUSB_CLASS_MSC);
+  hcd_pipe_xfer(pipe_hdl, xfer_data, sizeof(xfer_data), 100);
+  hcd_pipe_xfer(pipe_hdl, xfer_data, sizeof(xfer_data), 50);
+
+  ehci_qhd_t *p_qhd = &ehci_data.device[dev_addr].qhd[pipe_hdl.index];
+  ehci_qtd_t *p_qtd_head = p_qhd->p_qtd_list_head;
+  ehci_qtd_t *p_qtd_tail = p_qhd->p_qtd_list_tail;
+
+  hcd_pipe_close(pipe_hdl);
+
+  //------------- Code Under Test -------------//
+  regs->usb_sts_bit.async_advance = 1;
+  hcd_isr(hostid); // async advance
+
+  TEST_ASSERT_FALSE(p_qhd->used);
+  TEST_ASSERT_FALSE(p_qhd->is_removing);
+  TEST_ASSERT_NULL(p_qhd->p_qtd_list_head);
+  TEST_ASSERT_NULL(p_qhd->p_qtd_list_tail);
+  TEST_ASSERT_FALSE(p_qtd_head->used);
+  TEST_ASSERT_FALSE(p_qtd_tail->used);
+}

tinyusb/common/compiler/compiler.h

@@ -64,7 +64,7 @@
   #endif
 #endif
 
-
+// TODO refractor ATTR_PACKED(x)
 #if defined(__GNUC__)
   #include "compiler_gcc.h"
 #elif defined __ICCARM__ // IAR compiler

tinyusb/host/ehci/ehci.c

@@ -167,12 +167,48 @@ static inline uint8_t get_qhd_index(ehci_qhd_t * p_qhd)
 
 void async_advance_isr(ehci_qhd_t * const async_head)
 {
-  ehci_qhd_t *p_qhd = async_head;
-  do
+  if(async_head->is_removing) // closing control pipe of addr0
   {
+    async_head->is_removing = 0;
+    async_head->p_qtd_list_head = async_head->p_qtd_list_tail = NULL;
+    async_head->qtd_overlay.halted = 1;
+  }
 
-    p_qhd = (ehci_qhd_t*) align32(p_qhd->next.address);
-  }while(p_qhd != async_head); // stop if loop around
+  for(uint8_t relative_dev_addr=0; relative_dev_addr < TUSB_CFG_HOST_DEVICE_MAX; relative_dev_addr++)
+  {
+    // check if control endpoint is removing
+    ehci_qhd_t *p_control_qhd = &ehci_data.device[relative_dev_addr].control.qhd;
+    if( p_control_qhd->is_removing )
+    {
+      p_control_qhd->is_removing     = 0;
+      p_control_qhd->used            = 0;
+      p_control_qhd->p_qtd_list_head = p_control_qhd->p_qtd_list_tail = NULL;
+    }
+
+    // check if any other endpoints in pool is removing
+    for (uint8_t i=0; i<EHCI_MAX_QHD; i++)
+    {
+      ehci_qhd_t *p_qhd = &ehci_data.device[relative_dev_addr].qhd[i];
+      if (p_qhd->is_removing)
+      {
+        p_qhd->used        = 0;
+        p_qhd->is_removing = 0;
+
+        while(p_qhd->p_qtd_list_head != NULL) // remove all TDs
+        {
+          p_qhd->p_qtd_list_head->used = 0; // free QTD
+
+          if (p_qhd->p_qtd_list_head == p_qhd->p_qtd_list_tail) // last TD --> make it NULL
+          {
+            p_qhd->p_qtd_list_head = p_qhd->p_qtd_list_tail = NULL;
+          }else
+          {
+            p_qhd->p_qtd_list_head = (ehci_qtd_t*) align32(p_qhd->p_qtd_list_head->next.address);
+          }
+        }
+      }
+    }
+  }
 }
 
 void port_connect_status_change_isr(uint8_t hostid)
@@ -185,6 +221,8 @@ void port_connect_status_change_isr(uint8_t hostid)
     usbh_device_plugged_isr(hostid, regs->portsc_bit.nxp_port_speed); // NXP specific port speed
   }else // device unplugged
   {
+    printf("%s %d\n", __FUNCTION__, __LINE__);
+
     usbh_device_unplugged_isr(hostid);
 
     regs->usb_cmd_bit.advacne_async = 1; // Async doorbell check EHCI 4.8.2 for operational details
@@ -266,7 +304,7 @@ void hcd_isr(uint8_t hostid)
     regs->portsc |= EHCI_PORTSC_MASK_ALL; // Acknowledge all the change bit in portsc
   }
 
-  if (int_status & EHCI_INT_MASK_ASYNC_ADVANCE)
+  if (int_status & EHCI_INT_MASK_ASYNC_ADVANCE) // need to place after EHCI_INT_MASK_NXP_ASYNC
   {
     async_advance_isr( get_async_head(hostid) );
   }
@@ -488,14 +526,42 @@ tusb_error_t  hcd_pipe_control_xfer(uint8_t dev_addr, tusb_std_request_t const *
   return TUSB_ERROR_NONE;
 }
 
+ehci_qhd_t* find_previous_qhd(ehci_qhd_t* p_head, ehci_qhd_t* p_qhd)
+{
+  ehci_qhd_t *p_prev_qhd = p_head;
+  while( (align32(p_prev_qhd->next.address) != (uint32_t) p_head) && (align32(p_prev_qhd->next.address) != (uint32_t) p_qhd) )
+  {
+    p_prev_qhd = (ehci_qhd_t*) align32(p_prev_qhd->next.address);
+  }
+
+  return  align32(p_prev_qhd->next.address) != (uint32_t) p_head ? p_prev_qhd : NULL;
+}
+
+tusb_error_t remove_qhd_from_async_list(ehci_qhd_t* p_head, ehci_qhd_t* p_qhd_remove)
+{
+  ehci_qhd_t *p_prev_qhd = find_previous_qhd(p_head, p_qhd_remove);
+
+  ASSERT_PTR(p_prev_qhd, TUSB_ERROR_INVALID_PARA);
+
+  p_prev_qhd->next.address   = p_qhd_remove->next.address;
+  // EHCI 4.8.2 link the removing queue head to async_head (which always on the async list)
+  p_qhd_remove->next.address = (uint32_t) p_head;
+  p_qhd_remove->next.type    = EHCI_QUEUE_ELEMENT_QHD;
+
+  return TUSB_ERROR_NONE;
+}
+
 tusb_error_t  hcd_pipe_control_close(uint8_t dev_addr)
 {
   //------------- TODO pipe handle validate -------------//
   ehci_qhd_t * const p_qhd = get_control_qhd(dev_addr);
 
-  p_qhd->qtd_overlay.halted = 1;
+  p_qhd->is_removing = 1;
 
-  // TODO remove from async list
+  if (dev_addr != 0)
+  {
+    ASSERT_STATUS( remove_qhd_from_async_list(get_async_head( usbh_device_info_pool[dev_addr].core_id ), p_qhd) );
+  }
 
   return TUSB_ERROR_NONE;
 }
@@ -541,8 +607,6 @@ pipe_handle_t hcd_pipe_open(uint8_t dev_addr, tusb_descriptor_endpoint_t const *
   return (pipe_handle_t) { .dev_addr = dev_addr, .xfer_type = p_endpoint_desc->bmAttributes.xfer, .index = index};
 }
 
-
-
 tusb_error_t  hcd_pipe_xfer(pipe_handle_t pipe_hdl, uint8_t buffer[], uint16_t total_bytes, bool int_on_complete)
 {
   //------------- TODO pipe handle validate -------------//
@@ -568,6 +632,33 @@ tusb_error_t  hcd_pipe_xfer(pipe_handle_t pipe_hdl, uint8_t buffer[], uint16_t t
 
   return TUSB_ERROR_NONE;
 }
+
+static inline ehci_qhd_t* get_qhd_from_pipe_handle(pipe_handle_t pipe_hdl) ATTR_PURE ATTR_ALWAYS_INLINE;
+static inline ehci_qhd_t* get_qhd_from_pipe_handle(pipe_handle_t pipe_hdl)
+{
+  return &ehci_data.device[ pipe_hdl.dev_addr ].qhd[ pipe_hdl.index ];
+}
+
+tusb_error_t  hcd_pipe_close(pipe_handle_t pipe_hdl)
+{
+  ASSERT(pipe_hdl.xfer_type != TUSB_XFER_ISOCHRONOUS, TUSB_ERROR_INVALID_PARA);
+
+  ehci_qhd_t *p_qhd = get_qhd_from_pipe_handle( pipe_hdl );
+  p_qhd->is_removing = 1;
+
+  if ( pipe_hdl.xfer_type == TUSB_XFER_BULK )
+  {
+    ASSERT_STATUS( remove_qhd_from_async_list(
+        get_async_head( usbh_device_info_pool[pipe_hdl.dev_addr].core_id ),
+        p_qhd) );
+  }else
+  {
+    ASSERT(false, TUSB_ERROR_INVALID_PARA);
+  }
+
+  return TUSB_ERROR_NONE;
+}
+
 //--------------------------------------------------------------------+
 // HELPER
 //--------------------------------------------------------------------+
@@ -626,6 +717,7 @@ static void init_qhd(ehci_qhd_t *p_qhd, uint8_t dev_addr, uint16_t max_packet_si
 
   //------------- HCD Management Data -------------//
   p_qhd->used            = 1;
+  p_qhd->is_removing     = 0;
   p_qhd->p_qtd_list_head = NULL;
   p_qhd->p_qtd_list_tail = NULL;
   p_qhd->pid_non_control = (endpoint_addr & 0x80) ? EHCI_PID_IN : EHCI_PID_OUT; // PID for TD under this endpoint

tinyusb/host/ehci/ehci.h

@@ -194,10 +194,10 @@ typedef struct {
 	/// thus there are 16 bytes padding free that we can make use of.
   //--------------------------------------------------------------------+
 	uint8_t used;
+	uint8_t is_removing;
 	uint8_t pid_non_control;
 	uint8_t class_code;
 
-	uint8_t list_index;
 
 	ehci_qtd_t *p_qtd_list_head;	// head of the scheduled TD list
 	ehci_qtd_t *p_qtd_list_tail;	// tail of the scheduled TD list

tinyusb/host/usbh.c

@@ -201,6 +201,8 @@ void usbh_device_plugged_isr(uint8_t hostid, tusb_speed_t speed)
 
 void usbh_device_unplugged_isr(uint8_t hostid)
 {
+  printf("%s %d\n", __FUNCTION__, __LINE__);
+
   //------------- find the device address that is unplugged -------------//
   uint8_t dev_addr=1;
   while ( dev_addr <= TUSB_CFG_HOST_DEVICE_MAX && ! (usbh_device_info_pool[dev_addr].core_id == hostid &&