diff --git a/class/adb/usbd_adb.c b/class/adb/usbd_adb.c
index b193e35f..7629ea38 100644
--- a/class/adb/usbd_adb.c
+++ b/class/adb/usbd_adb.c
@@ -61,7 +61,7 @@ USB_NOCACHE_RAM_SECTION struct adb_packet rx_packet;
 static inline uint32_t adb_packet_checksum(struct adb_packet *packet)
 {
     uint32_t sum = 0;
-    int i;
+    uint32_t i;
 
     for (i = 0; i < packet->msg.data_length; ++i) {
         sum += (uint32_t)(packet->payload[i]);
@@ -111,6 +111,8 @@ static void adb_send_close(struct adb_packet *packet, uint32_t localid, uint32_t
 
 void usbd_adb_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    (void)ep;
+
     if (adb_client.common_state == ADB_STATE_READ_MSG) {
         if (nbytes != sizeof(struct adb_msg)) {
             USB_LOG_ERR("invalid adb msg size:%d\r\n", nbytes);
@@ -202,6 +204,9 @@ void usbd_adb_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
 
 void usbd_adb_bulk_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    (void)ep;
+    (void)nbytes;
+
     if (adb_client.common_state == ADB_STATE_WRITE_MSG) {
         if (tx_packet.msg.data_length) {
             adb_client.common_state = ADB_STATE_WRITE_DATA;
@@ -235,6 +240,8 @@ void usbd_adb_bulk_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
 
 void adb_notify_handler(uint8_t busid, uint8_t event, void *arg)
 {
+    (void)arg;
+
     switch (event) {
         case USBD_EVENT_INIT:
             break;
@@ -255,6 +262,8 @@ void adb_notify_handler(uint8_t busid, uint8_t event, void *arg)
 
 struct usbd_interface *usbd_adb_init_intf(uint8_t busid, struct usbd_interface *intf, uint8_t in_ep, uint8_t out_ep)
 {
+    (void)busid;
+
     intf->class_interface_handler = NULL;
     intf->class_endpoint_handler = NULL;
     intf->vendor_handler = NULL;
diff --git a/class/audio/usbd_audio.c b/class/audio/usbd_audio.c
index c78c8ed7..4ff3767a 100644
--- a/class/audio/usbd_audio.c
+++ b/class/audio/usbd_audio.c
@@ -62,7 +62,7 @@ static int audio_class_interface_request_handler(uint8_t busid, struct usb_setup
                 setup->bRequest);
 
     uint8_t entity_id;
-    uint8_t ep;
+    uint8_t ep = 0;
     uint8_t subtype = 0x01;
     uint8_t control_selector;
     uint8_t ch;
@@ -287,7 +287,7 @@ static void audio_notify_handler(uint8_t busid, uint8_t event, void *arg)
     }
 }
 
-struct usbd_interface *usbd_audio_init_intf(uint8_t busid, 
+struct usbd_interface *usbd_audio_init_intf(uint8_t busid,
                                             struct usbd_interface *intf,
                                             uint16_t uac_version,
                                             struct audio_entity_info *table,
@@ -314,31 +314,56 @@ struct usbd_interface *usbd_audio_init_intf(uint8_t busid,
 
 __WEAK void usbd_audio_set_volume(uint8_t busid, uint8_t ep, uint8_t ch, int volume)
 {
+    (void)busid;
+    (void)ep;
+    (void)ch;
+    (void)volume;
 }
 
 __WEAK int usbd_audio_get_volume(uint8_t busid, uint8_t ep, uint8_t ch)
 {
+    (void)busid;
+    (void)ep;
+    (void)ch;
+
     return 0;
 }
 
 __WEAK void usbd_audio_set_mute(uint8_t busid, uint8_t ep, uint8_t ch, bool mute)
 {
+    (void)busid;
+    (void)ep;
+    (void)ch;
+    (void)mute;
 }
 
 __WEAK bool usbd_audio_get_mute(uint8_t busid, uint8_t ep, uint8_t ch)
 {
+    (void)busid;
+    (void)ep;
+    (void)ch;
+
     return 0;
 }
 
 __WEAK void usbd_audio_set_sampling_freq(uint8_t busid, uint8_t ep, uint32_t sampling_freq)
 {
+    (void)busid;
+    (void)ep;
+    (void)sampling_freq;
 }
 
 __WEAK uint32_t usbd_audio_get_sampling_freq(uint8_t busid, uint8_t ep)
 {
+    (void)busid;
+    (void)ep;
+
     return 0;
 }
 
 __WEAK void usbd_audio_get_sampling_freq_table(uint8_t busid, uint8_t ep, uint8_t **sampling_freq_table)
 {
+    (void)busid;
+    (void)ep;
+    (void)sampling_freq_table;
 }
diff --git a/class/audio/usbh_audio.c b/class/audio/usbh_audio.c
index 223c340b..2f067826 100644
--- a/class/audio/usbh_audio.c
+++ b/class/audio/usbh_audio.c
@@ -456,20 +456,26 @@ static int usbh_audio_ctrl_disconnect(struct usbh_hubport *hport, uint8_t intf)
 
 static int usbh_audio_data_connect(struct usbh_hubport *hport, uint8_t intf)
 {
+    (void)hport;
+    (void)intf;
     return 0;
 }
 
 static int usbh_audio_data_disconnect(struct usbh_hubport *hport, uint8_t intf)
 {
+    (void)hport;
+    (void)intf;
     return 0;
 }
 
 __WEAK void usbh_audio_run(struct usbh_audio *audio_class)
 {
+    (void)audio_class;
 }
 
 __WEAK void usbh_audio_stop(struct usbh_audio *audio_class)
 {
+    (void)audio_class;
 }
 
 const struct usbh_class_driver audio_ctrl_class_driver = {
diff --git a/class/cdc/usbd_cdc_acm.c b/class/cdc/usbd_cdc_acm.c
index 1ef83028..cf7c3c0d 100644
--- a/class/cdc/usbd_cdc_acm.c
+++ b/class/cdc/usbd_cdc_acm.c
@@ -85,6 +85,8 @@ static int cdc_acm_class_interface_request_handler(uint8_t busid, struct usb_set
 
 struct usbd_interface *usbd_cdc_acm_init_intf(uint8_t busid, struct usbd_interface *intf)
 {
+    (void)busid;
+
     intf->class_interface_handler = cdc_acm_class_interface_request_handler;
     intf->class_endpoint_handler = NULL;
     intf->vendor_handler = NULL;
@@ -95,10 +97,16 @@ struct usbd_interface *usbd_cdc_acm_init_intf(uint8_t busid, struct usbd_interfa
 
 __WEAK void usbd_cdc_acm_set_line_coding(uint8_t busid, uint8_t intf, struct cdc_line_coding *line_coding)
 {
+    (void)busid;
+    (void)intf;
+    (void)line_coding;
 }
 
 __WEAK void usbd_cdc_acm_get_line_coding(uint8_t busid, uint8_t intf, struct cdc_line_coding *line_coding)
 {
+    (void)busid;
+    (void)intf;
+
     line_coding->dwDTERate = 2000000;
     line_coding->bDataBits = 8;
     line_coding->bParityType = 0;
@@ -107,12 +115,20 @@ __WEAK void usbd_cdc_acm_get_line_coding(uint8_t busid, uint8_t intf, struct cdc
 
 __WEAK void usbd_cdc_acm_set_dtr(uint8_t busid, uint8_t intf, bool dtr)
 {
+    (void)busid;
+    (void)intf;
+    (void)dtr;
 }
 
 __WEAK void usbd_cdc_acm_set_rts(uint8_t busid, uint8_t intf, bool rts)
 {
+    (void)busid;
+    (void)intf;
+    (void)rts;
 }
 
 __WEAK void usbd_cdc_acm_send_break(uint8_t busid, uint8_t intf)
 {
+    (void)busid;
+    (void)intf;
 }
diff --git a/class/cdc/usbd_cdc_ecm.c b/class/cdc/usbd_cdc_ecm.c
index b0c1217d..29e82cee 100644
--- a/class/cdc/usbd_cdc_ecm.c
+++ b/class/cdc/usbd_cdc_ecm.c
@@ -79,6 +79,10 @@ static int cdc_ecm_class_interface_request_handler(uint8_t busid, struct usb_set
                 "bRequest 0x%02x\r\n",
                 setup->bRequest);
 
+    (void)busid;
+    (void)data;
+    (void)len;
+
     g_cmd_intf = LO_BYTE(setup->wIndex);
 
     switch (setup->bRequest) {
@@ -105,6 +109,9 @@ static int cdc_ecm_class_interface_request_handler(uint8_t busid, struct usb_set
 
 void cdc_ecm_notify_handler(uint8_t busid, uint8_t event, void *arg)
 {
+    (void)busid;
+    (void)arg;
+
     switch (event) {
         case USBD_EVENT_RESET:
             g_current_net_status = 0;
@@ -123,19 +130,23 @@ void cdc_ecm_notify_handler(uint8_t busid, uint8_t event, void *arg)
 
 void cdc_ecm_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    (void)busid;
+
     g_cdc_ecm_rx_data_length += nbytes;
 
-    if (nbytes < usbd_get_ep_mps(busid, ep)) {
+    if (nbytes < usbd_get_ep_mps(0, ep)) {
         g_cdc_ecm_rx_data_buffer = g_cdc_ecm_rx_buffer;
         usbd_cdc_ecm_data_recv_done(g_cdc_ecm_rx_buffer, g_cdc_ecm_rx_data_length);
     } else {
-        usbd_ep_start_read(0, ep, &g_cdc_ecm_rx_buffer[g_cdc_ecm_rx_data_length], usbd_get_ep_mps(busid, ep));
+        usbd_ep_start_read(0, ep, &g_cdc_ecm_rx_buffer[g_cdc_ecm_rx_data_length], usbd_get_ep_mps(0, ep));
     }
 }
 
 void cdc_ecm_bulk_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
-    if ((nbytes % usbd_get_ep_mps(busid, ep)) == 0 && nbytes) {
+    (void)busid;
+
+    if ((nbytes % usbd_get_ep_mps(0, ep)) == 0 && nbytes) {
         /* send zlp */
         usbd_ep_start_write(0, ep, NULL, 0);
     } else {
@@ -145,6 +156,10 @@ void cdc_ecm_bulk_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
 
 void cdc_ecm_int_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    (void)busid;
+    (void)ep;
+    (void)nbytes;
+
     if (g_current_net_status == 1) {
         g_current_net_status = 2;
         usbd_cdc_ecm_send_notify(CDC_ECM_NOTIFY_CODE_NETWORK_CONNECTION, CDC_ECM_NET_CONNECTED, g_connect_speed_table);
@@ -242,4 +257,6 @@ void usbd_cdc_ecm_set_connect_speed(uint32_t speed[2])
 
 __WEAK void usbd_cdc_ecm_data_recv_done(uint8_t *buf, uint32_t len)
 {
+    (void)buf;
+    (void)len;
 }
diff --git a/class/cdc/usbh_cdc_acm.c b/class/cdc/usbh_cdc_acm.c
index dc963d0c..957c6b2e 100644
--- a/class/cdc/usbh_cdc_acm.c
+++ b/class/cdc/usbh_cdc_acm.c
@@ -231,20 +231,26 @@ int usbh_cdc_acm_bulk_out_transfer(struct usbh_cdc_acm *cdc_acm_class, uint8_t *
 
 static int usbh_cdc_data_connect(struct usbh_hubport *hport, uint8_t intf)
 {
+    (void)hport;
+    (void)intf;
     return 0;
 }
 
 static int usbh_cdc_data_disconnect(struct usbh_hubport *hport, uint8_t intf)
 {
+    (void)hport;
+    (void)intf;
     return 0;
 }
 
 __WEAK void usbh_cdc_acm_run(struct usbh_cdc_acm *cdc_acm_class)
 {
+    (void)cdc_acm_class;
 }
 
 __WEAK void usbh_cdc_acm_stop(struct usbh_cdc_acm *cdc_acm_class)
 {
+    (void)cdc_acm_class;
 }
 
 const struct usbh_class_driver cdc_acm_class_driver = {
diff --git a/class/cdc/usbh_cdc_ecm.c b/class/cdc/usbh_cdc_ecm.c
index ad05d516..76cfb41a 100644
--- a/class/cdc/usbh_cdc_ecm.c
+++ b/class/cdc/usbh_cdc_ecm.c
@@ -236,6 +236,7 @@ void usbh_cdc_ecm_rx_thread(void *argument)
     uint32_t g_cdc_ecm_rx_length;
     int ret;
 
+    (void)argument;
     USB_LOG_INFO("Create cdc ecm rx thread\r\n");
     // clang-format off
 find_class:
@@ -306,10 +307,12 @@ int usbh_cdc_ecm_eth_output(uint32_t buflen)
 
 __WEAK void usbh_cdc_ecm_run(struct usbh_cdc_ecm *cdc_ecm_class)
 {
+    (void)cdc_ecm_class;
 }
 
 __WEAK void usbh_cdc_ecm_stop(struct usbh_cdc_ecm *cdc_ecm_class)
 {
+    (void)cdc_ecm_class;
 }
 
 const struct usbh_class_driver cdc_ecm_class_driver = {
diff --git a/class/cdc/usbh_cdc_ncm.c b/class/cdc/usbh_cdc_ncm.c
index e1300f73..2456fba5 100644
--- a/class/cdc/usbh_cdc_ncm.c
+++ b/class/cdc/usbh_cdc_ncm.c
@@ -259,6 +259,7 @@ void usbh_cdc_ncm_rx_thread(void *argument)
     uint32_t transfer_size = (16 * 1024);
 #endif
 
+    (void)argument;
     USB_LOG_INFO("Create cdc ncm rx thread\r\n");
     // clang-format off
 find_class:
@@ -386,10 +387,12 @@ int usbh_cdc_ncm_eth_output(uint32_t buflen)
 
 __WEAK void usbh_cdc_ncm_run(struct usbh_cdc_ncm *cdc_ncm_class)
 {
+    (void)cdc_ncm_class;
 }
 
 __WEAK void usbh_cdc_ncm_stop(struct usbh_cdc_ncm *cdc_ncm_class)
 {
+    (void)cdc_ncm_class;
 }
 
 const struct usbh_class_driver cdc_ncm_class_driver = {
diff --git a/class/hid/usbd_hid.c b/class/hid/usbd_hid.c
index d98b82eb..fed749f2 100644
--- a/class/hid/usbd_hid.c
+++ b/class/hid/usbd_hid.c
@@ -50,6 +50,8 @@ static int hid_class_interface_request_handler(uint8_t busid, struct usb_setup_p
 
 struct usbd_interface *usbd_hid_init_intf(uint8_t busid, struct usbd_interface *intf, const uint8_t *desc, uint32_t desc_len)
 {
+    (void)busid;
+
     intf->class_interface_handler = hid_class_interface_request_handler;
     intf->class_endpoint_handler = NULL;
     intf->vendor_handler = NULL;
@@ -60,30 +62,65 @@ struct usbd_interface *usbd_hid_init_intf(uint8_t busid, struct usbd_interface *
     return intf;
 }
 
+/*
+ * Appendix G: HID Request Support Requirements
+ *
+ * The following table enumerates the requests that need to be supported by various types of HID class devices.
+ * Device type     GetReport   SetReport   GetIdle     SetIdle     GetProtocol SetProtocol
+ * ------------------------------------------------------------------------------------------
+ * Boot Mouse      Required    Optional    Optional    Optional    Required    Required
+ * Non-Boot Mouse  Required    Optional    Optional    Optional    Optional    Optional
+ * Boot Keyboard   Required    Optional    Required    Required    Required    Required
+ * Non-Boot Keybrd Required    Optional    Required    Required    Optional    Optional
+ * Other Device    Required    Optional    Optional    Optional    Optional    Optional
+ */
+
 __WEAK void usbd_hid_get_report(uint8_t busid, uint8_t intf, uint8_t report_id, uint8_t report_type, uint8_t **data, uint32_t *len)
 {
+    (void)busid;
+    (void)intf;
+    (void)report_id;
+    (void)report_type;
     (*data[0]) = 0;
     *len = 1;
 }
 
 __WEAK uint8_t usbd_hid_get_idle(uint8_t busid, uint8_t intf, uint8_t report_id)
 {
+    (void)busid;
+    (void)intf;
+    (void)report_id;
     return 0;
 }
 
 __WEAK uint8_t usbd_hid_get_protocol(uint8_t busid, uint8_t intf)
 {
+    (void)busid;
+    (void)intf;
     return 0;
 }
 
 __WEAK void usbd_hid_set_report(uint8_t busid, uint8_t intf, uint8_t report_id, uint8_t report_type, uint8_t *report, uint32_t report_len)
 {
+    (void)busid;
+    (void)intf;
+    (void)report_id;
+    (void)report_type;
+    (void)report;
+    (void)report_len;
 }
 
 __WEAK void usbd_hid_set_idle(uint8_t busid, uint8_t intf, uint8_t report_id, uint8_t duration)
 {
+    (void)busid;
+    (void)intf;
+    (void)report_id;
+    (void)duration;
 }
 
 __WEAK void usbd_hid_set_protocol(uint8_t busid, uint8_t intf, uint8_t protocol)
 {
+    (void)busid;
+    (void)intf;
+    (void)protocol;
 }
\ No newline at end of file
diff --git a/class/hid/usbh_hid.c b/class/hid/usbh_hid.c
index a6129ef4..d2a25b30 100644
--- a/class/hid/usbh_hid.c
+++ b/class/hid/usbh_hid.c
@@ -297,10 +297,12 @@ int usbh_hid_disconnect(struct usbh_hubport *hport, uint8_t intf)
 
 __WEAK void usbh_hid_run(struct usbh_hid *hid_class)
 {
+    (void)hid_class;
 }
 
 __WEAK void usbh_hid_stop(struct usbh_hid *hid_class)
 {
+    (void)hid_class;
 }
 
 const struct usbh_class_driver hid_class_driver = {
diff --git a/class/hub/usbh_hub.c b/class/hub/usbh_hub.c
index d0974a02..a39a8d15 100644
--- a/class/hub/usbh_hub.c
+++ b/class/hub/usbh_hub.c
@@ -170,6 +170,8 @@ static int _usbh_hub_set_depth(struct usbh_hub *hub, uint16_t depth)
 #if CONFIG_USBHOST_MAX_EXTHUBS > 0
 static int parse_hub_descriptor(struct usb_hub_descriptor *desc, uint16_t length)
 {
+    (void)length;
+
     if (desc->bLength != USB_SIZEOF_HUB_DESC) {
         USB_LOG_ERR("invalid device bLength 0x%02x\r\n", desc->bLength);
         return -1;
@@ -192,6 +194,8 @@ static int parse_hub_descriptor(struct usb_hub_descriptor *desc, uint16_t length
 
 static int parse_hub_ss_descriptor(struct usb_hub_ss_descriptor *desc, uint16_t length)
 {
+    (void)length;
+
     if (desc->bLength < USB_SIZEOF_HUB_SS_DESC) {
         USB_LOG_ERR("invalid device bLength 0x%02x\r\n", desc->bLength);
         return -1;
diff --git a/class/msc/usbd_msc.c b/class/msc/usbd_msc.c
index 81f58dd9..b562f474 100644
--- a/class/msc/usbd_msc.c
+++ b/class/msc/usbd_msc.c
@@ -100,6 +100,8 @@ static int msc_storage_class_interface_request_handler(uint8_t busid, struct usb
 
 void msc_storage_notify_handler(uint8_t busid, uint8_t event, void *arg)
 {
+    (void)arg;
+
     switch (event) {
         case USBD_EVENT_INIT:
 #if defined(CONFIG_USBDEV_MSC_THREAD)
@@ -508,6 +510,9 @@ static bool SCSI_readCapacity10(uint8_t busid, uint8_t **data, uint32_t *len)
 
 static bool SCSI_read10(uint8_t busid, uint8_t **data, uint32_t *len)
 {
+    (void)data;
+    (void)len;
+
     if (((g_usbd_msc[busid].cbw.bmFlags & 0x80U) != 0x80U) || (g_usbd_msc[busid].cbw.dDataLength == 0U)) {
         SCSI_SetSenseData(busid, SCSI_KCQIR_INVALIDCOMMAND);
         return false;
@@ -542,6 +547,9 @@ static bool SCSI_read10(uint8_t busid, uint8_t **data, uint32_t *len)
 
 static bool SCSI_read12(uint8_t busid, uint8_t **data, uint32_t *len)
 {
+    (void)data;
+    (void)len;
+
     if (((g_usbd_msc[busid].cbw.bmFlags & 0x80U) != 0x80U) || (g_usbd_msc[busid].cbw.dDataLength == 0U)) {
         SCSI_SetSenseData(busid, SCSI_KCQIR_INVALIDCOMMAND);
         return false;
@@ -577,6 +585,10 @@ static bool SCSI_read12(uint8_t busid, uint8_t **data, uint32_t *len)
 static bool SCSI_write10(uint8_t busid, uint8_t **data, uint32_t *len)
 {
     uint32_t data_len = 0;
+
+    (void)data;
+    (void)len;
+
     if (((g_usbd_msc[busid].cbw.bmFlags & 0x80U) != 0x00U) || (g_usbd_msc[busid].cbw.dDataLength == 0U)) {
         SCSI_SetSenseData(busid, SCSI_KCQIR_INVALIDCOMMAND);
         return false;
@@ -606,6 +618,10 @@ static bool SCSI_write10(uint8_t busid, uint8_t **data, uint32_t *len)
 static bool SCSI_write12(uint8_t busid, uint8_t **data, uint32_t *len)
 {
     uint32_t data_len = 0;
+
+    (void)data;
+    (void)len;
+
     if (((g_usbd_msc[busid].cbw.bmFlags & 0x80U) != 0x00U) || (g_usbd_msc[busid].cbw.dDataLength == 0U)) {
         SCSI_SetSenseData(busid, SCSI_KCQIR_INVALIDCOMMAND);
         return false;
@@ -815,6 +831,8 @@ static bool SCSI_CBWDecode(uint8_t busid, uint32_t nbytes)
 
 void mass_storage_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    (void)ep;
+
     switch (g_usbd_msc[busid].stage) {
         case MSC_READ_CBW:
             if (SCSI_CBWDecode(busid, nbytes) == false) {
@@ -850,6 +868,9 @@ void mass_storage_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
 
 void mass_storage_bulk_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    (void)ep;
+    (void)nbytes;
+
     switch (g_usbd_msc[busid].stage) {
         case MSC_DATA_IN:
             switch (g_usbd_msc[busid].cbw.CB[0]) {
diff --git a/class/msc/usbh_msc.c b/class/msc/usbh_msc.c
index 8f420e75..773b0def 100644
--- a/class/msc/usbh_msc.c
+++ b/class/msc/usbh_msc.c
@@ -87,6 +87,8 @@ static void usbh_msc_cbw_dump(struct CBW *cbw)
 
 static void usbh_msc_csw_dump(struct CSW *csw)
 {
+    (void)csw;
+
     USB_LOG_DBG("CSW:\r\n");
     USB_LOG_DBG("  signature: 0x%08x\r\n", (unsigned int)csw->dSignature);
     USB_LOG_DBG("  tag:       0x%08x\r\n", (unsigned int)csw->dTag);
@@ -421,10 +423,12 @@ void usbh_msc_modeswitch_enable(struct usbh_msc_modeswitch_config *config)
 
 __WEAK void usbh_msc_run(struct usbh_msc *msc_class)
 {
+    (void)msc_class;
 }
 
 __WEAK void usbh_msc_stop(struct usbh_msc *msc_class)
 {
+    (void)msc_class;
 }
 
 const struct usbh_class_driver msc_class_driver = {
diff --git a/class/vendor/net/usbh_asix.c b/class/vendor/net/usbh_asix.c
index 0b0f4ffc..cbc3c5d6 100644
--- a/class/vendor/net/usbh_asix.c
+++ b/class/vendor/net/usbh_asix.c
@@ -680,6 +680,7 @@ void usbh_asix_rx_thread(void *argument)
     uint32_t transfer_size = (16 * 1024);
 #endif
 
+    (void)argument;
     USB_LOG_INFO("Create asix rx thread\r\n");
     // clang-format off
 find_class:
@@ -791,10 +792,12 @@ int usbh_asix_eth_output(uint32_t buflen)
 
 __WEAK void usbh_asix_run(struct usbh_asix *asix_class)
 {
+    (void)asix_class;
 }
 
 __WEAK void usbh_asix_stop(struct usbh_asix *asix_class)
 {
+    (void)asix_class;
 }
 
 static const uint16_t asix_id_table[][2] = {
diff --git a/class/vendor/net/usbh_rtl8152.c b/class/vendor/net/usbh_rtl8152.c
index 905e226e..cbf7ea4f 100644
--- a/class/vendor/net/usbh_rtl8152.c
+++ b/class/vendor/net/usbh_rtl8152.c
@@ -2140,6 +2140,7 @@ void usbh_rtl8152_rx_thread(void *argument)
     uint32_t transfer_size = (16 * 1024);
 #endif
 
+    (void)argument;
     USB_LOG_INFO("Create rtl8152 rx thread\r\n");
     // clang-format off
 find_class:
@@ -2248,10 +2249,12 @@ int usbh_rtl8152_eth_output(uint32_t buflen)
 
 __WEAK void usbh_rtl8152_run(struct usbh_rtl8152 *rtl8152_class)
 {
+    (void)rtl8152_class;
 }
 
 __WEAK void usbh_rtl8152_stop(struct usbh_rtl8152 *rtl8152_class)
 {
+    (void)rtl8152_class;
 }
 
 static const uint16_t rtl_id_table[][2] = {
diff --git a/class/vendor/serial/usbh_ch34x.c b/class/vendor/serial/usbh_ch34x.c
index 7c275e17..92cafde3 100644
--- a/class/vendor/serial/usbh_ch34x.c
+++ b/class/vendor/serial/usbh_ch34x.c
@@ -349,10 +349,12 @@ int usbh_ch34x_bulk_out_transfer(struct usbh_ch34x *ch34x_class, uint8_t *buffer
 
 __WEAK void usbh_ch34x_run(struct usbh_ch34x *ch34x_class)
 {
+    (void)ch34x_class;
 }
 
 __WEAK void usbh_ch34x_stop(struct usbh_ch34x *ch34x_class)
 {
+    (void)ch34x_class;
 }
 
 static const uint16_t ch34x_id_table[][2] = {
diff --git a/class/vendor/serial/usbh_cp210x.c b/class/vendor/serial/usbh_cp210x.c
index 4835f7ab..a82ee0f7 100644
--- a/class/vendor/serial/usbh_cp210x.c
+++ b/class/vendor/serial/usbh_cp210x.c
@@ -298,10 +298,12 @@ int usbh_cp210x_bulk_out_transfer(struct usbh_cp210x *cp210x_class, uint8_t *buf
 
 __WEAK void usbh_cp210x_run(struct usbh_cp210x *cp210x_class)
 {
+    (void)cp210x_class;
 }
 
 __WEAK void usbh_cp210x_stop(struct usbh_cp210x *cp210x_class)
 {
+    (void)cp210x_class;
 }
 
 static const uint16_t cp210x_id_table[][2] = {
diff --git a/class/vendor/serial/usbh_ftdi.c b/class/vendor/serial/usbh_ftdi.c
index 28c1c8ad..8b58138b 100644
--- a/class/vendor/serial/usbh_ftdi.c
+++ b/class/vendor/serial/usbh_ftdi.c
@@ -57,7 +57,7 @@ static void usbh_ftdi_caculate_baudrate(uint32_t *itdf_divisor, uint32_t actual_
         }
         int divisor = FTDI_USB_CLK / baudrate;
         int frac_bits = 0;
-        for (int i = 0; i < sizeof(frac) / sizeof(frac[0]); i++) {
+        for (uint8_t i = 0; i < sizeof(frac) / sizeof(frac[0]); i++) {
             if ((divisor & 0xF) == frac[i]) {
                 frac_bits = i;
                 break;
@@ -370,10 +370,12 @@ int usbh_ftdi_bulk_out_transfer(struct usbh_ftdi *ftdi_class, uint8_t *buffer, u
 
 __WEAK void usbh_ftdi_run(struct usbh_ftdi *ftdi_class)
 {
+    (void)ftdi_class;
 }
 
 __WEAK void usbh_ftdi_stop(struct usbh_ftdi *ftdi_class)
 {
+    (void)ftdi_class;
 }
 
 static const uint16_t ftdi_id_table[][2] = {
diff --git a/class/vendor/serial/usbh_pl2303.c b/class/vendor/serial/usbh_pl2303.c
index 98799427..5000b4d8 100644
--- a/class/vendor/serial/usbh_pl2303.c
+++ b/class/vendor/serial/usbh_pl2303.c
@@ -413,10 +413,12 @@ int usbh_pl2303_bulk_out_transfer(struct usbh_pl2303 *pl2303_class, uint8_t *buf
 
 __WEAK void usbh_pl2303_run(struct usbh_pl2303 *pl2303_class)
 {
+    (void)pl2303_class;
 }
 
 __WEAK void usbh_pl2303_stop(struct usbh_pl2303 *pl2303_class)
 {
+    (void)pl2303_class;
 }
 
 static const uint16_t pl2303_id_table[][2] = {
diff --git a/class/vendor/wifi/usbh_bl616.c b/class/vendor/wifi/usbh_bl616.c
index 6145a03d..34cbcf87 100644
--- a/class/vendor/wifi/usbh_bl616.c
+++ b/class/vendor/wifi/usbh_bl616.c
@@ -356,6 +356,7 @@ void usbh_bl616_rx_thread(void *argument)
     rnm_scan_ind_msg_t *scanmsg;
     uint8_t *data;
 
+    (void)argument;
     USB_LOG_INFO("Create bl616 wifi rx thread\r\n");
 
     while (1) {
@@ -473,15 +474,21 @@ int wifi_sta_connect(int argc, char **argv)
 
 int wifi_scan(int argc, char **argv)
 {
+    (void)argc;
+    (void)argv;
+
     usbh_bl616_wifi_scan();
     return 0;
 }
+
 __WEAK void usbh_bl616_run(struct usbh_bl616 *bl616_class)
 {
+    (void)bl616_class;
 }
 
 __WEAK void usbh_bl616_stop(struct usbh_bl616 *bl616_class)
 {
+    (void)bl616_class;
 }
 
 static const uint16_t bl616_id_table[][2] = {
diff --git a/class/video/usbd_video.c b/class/video/usbd_video.c
index b11fa6ad..ee8ca5ee 100644
--- a/class/video/usbd_video.c
+++ b/class/video/usbd_video.c
@@ -24,6 +24,8 @@ static int usbd_video_control_request_handler(uint8_t busid, struct usb_setup_pa
 {
     uint8_t control_selector = (uint8_t)(setup->wValue >> 8);
 
+    (void)busid;
+
     switch (control_selector) {
         case VIDEO_VC_VIDEO_POWER_MODE_CONTROL:
             switch (setup->bRequest) {
diff --git a/class/video/usbh_video.c b/class/video/usbh_video.c
index 0d3f79f7..c5458a40 100644
--- a/class/video/usbh_video.c
+++ b/class/video/usbh_video.c
@@ -495,20 +495,26 @@ static int usbh_video_ctrl_disconnect(struct usbh_hubport *hport, uint8_t intf)
 
 static int usbh_video_streaming_connect(struct usbh_hubport *hport, uint8_t intf)
 {
+    (void)hport;
+    (void)intf;
     return 0;
 }
 
 static int usbh_video_streaming_disconnect(struct usbh_hubport *hport, uint8_t intf)
 {
+    (void)hport;
+    (void)intf;
     return 0;
 }
 
 __WEAK void usbh_video_run(struct usbh_video *video_class)
 {
+    (void)video_class;
 }
 
 __WEAK void usbh_video_stop(struct usbh_video *video_class)
 {
+    (void)video_class;
 }
 
 const struct usbh_class_driver video_ctrl_class_driver = {
diff --git a/class/wireless/usbd_rndis.c b/class/wireless/usbd_rndis.c
index c357b25a..61bcd290 100644
--- a/class/wireless/usbd_rndis.c
+++ b/class/wireless/usbd_rndis.c
@@ -102,6 +102,8 @@ static void rndis_notify_rsp(void)
 
 static int rndis_class_interface_request_handler(uint8_t busid, struct usb_setup_packet *setup, uint8_t **data, uint32_t *len)
 {
+    (void)busid;
+
     switch (setup->bRequest) {
         case CDC_REQUEST_SEND_ENCAPSULATED_COMMAND:
             rndis_encapsulated_cmd_handler(*data, setup->wLength);
@@ -152,6 +154,8 @@ static int rndis_init_cmd_handler(uint8_t *data, uint32_t len)
     rndis_initialize_msg_t *cmd = (rndis_initialize_msg_t *)data;
     rndis_initialize_cmplt_t *resp;
 
+    (void)len;
+
     resp = ((rndis_initialize_cmplt_t *)rndis_encapsulated_resp_buffer);
     resp->RequestId = cmd->RequestId;
     resp->MessageType = REMOTE_NDIS_INITIALIZE_CMPLT;
@@ -177,6 +181,9 @@ static int rndis_halt_cmd_handler(uint8_t *data, uint32_t len)
 {
     rndis_halt_msg_t *resp;
 
+    (void)data;
+    (void)len;
+
     resp = ((rndis_halt_msg_t *)rndis_encapsulated_resp_buffer);
     resp->MessageLength = 0;
 
@@ -192,6 +199,8 @@ static int rndis_query_cmd_handler(uint8_t *data, uint32_t len)
     uint8_t *infomation_buffer;
     uint32_t infomation_len = 0;
 
+    (void)len;
+
     resp = ((rndis_query_cmplt_t *)rndis_encapsulated_resp_buffer);
     resp->MessageType = REMOTE_NDIS_QUERY_CMPLT;
     resp->RequestId = cmd->RequestId;
@@ -338,6 +347,8 @@ static int rndis_set_cmd_handler(uint8_t *data, uint32_t len)
     rndis_set_cmplt_t *resp;
     rndis_config_parameter_t *param;
 
+    (void)len;
+
     resp = ((rndis_set_cmplt_t *)rndis_encapsulated_resp_buffer);
     resp->RequestId = cmd->RequestId;
     resp->MessageType = REMOTE_NDIS_SET_CMPLT;
@@ -394,6 +405,9 @@ static int rndis_reset_cmd_handler(uint8_t *data, uint32_t len)
     // rndis_reset_msg_t *cmd = (rndis_reset_msg_t *)data;
     rndis_reset_cmplt_t *resp;
 
+    (void)data;
+    (void)len;
+
     resp = ((rndis_reset_cmplt_t *)rndis_encapsulated_resp_buffer);
     resp->MessageType = REMOTE_NDIS_RESET_CMPLT;
     resp->MessageLength = sizeof(rndis_reset_cmplt_t);
@@ -412,6 +426,8 @@ static int rndis_keepalive_cmd_handler(uint8_t *data, uint32_t len)
     rndis_keepalive_msg_t *cmd = (rndis_keepalive_msg_t *)data;
     rndis_keepalive_cmplt_t *resp;
 
+    (void)len;
+
     resp = ((rndis_keepalive_cmplt_t *)rndis_encapsulated_resp_buffer);
     resp->RequestId = cmd->RequestId;
     resp->MessageType = REMOTE_NDIS_KEEPALIVE_CMPLT;
@@ -425,6 +441,9 @@ static int rndis_keepalive_cmd_handler(uint8_t *data, uint32_t len)
 
 static void rndis_notify_handler(uint8_t busid, uint8_t event, void *arg)
 {
+    (void)busid;
+    (void)arg;
+
     switch (event) {
         case USBD_EVENT_RESET:
             g_usbd_rndis.link_status = NDIS_MEDIA_STATE_DISCONNECTED;
@@ -445,6 +464,9 @@ void rndis_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
     rndis_data_packet_t *hdr;
 
+    (void)busid;
+    (void)ep;
+
     hdr = (rndis_data_packet_t *)g_rndis_rx_buffer;
     g_rndis_rx_data_buffer = g_rndis_rx_buffer;
     if ((hdr->MessageType != REMOTE_NDIS_PACKET_MSG) || (nbytes < hdr->MessageLength)) {
@@ -461,7 +483,9 @@ void rndis_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
 
 void rndis_bulk_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
-    if ((nbytes % usbd_get_ep_mps(busid, ep)) == 0 && nbytes) {
+    (void)busid;
+
+    if ((nbytes % usbd_get_ep_mps(0, ep)) == 0 && nbytes) {
         /* send zlp */
         usbd_ep_start_write(0, ep, NULL, 0);
     } else {
@@ -471,6 +495,10 @@ void rndis_bulk_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
 
 void rndis_int_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
 {
+    (void)busid;
+    (void)ep;
+    (void)nbytes;
+
     //USB_LOG_DBG("len:%d\r\n", nbytes);
 }
 
diff --git a/class/wireless/usbh_bluetooth.c b/class/wireless/usbh_bluetooth.c
index e73eeb03..9f78866a 100644
--- a/class/wireless/usbh_bluetooth.c
+++ b/class/wireless/usbh_bluetooth.c
@@ -365,14 +365,18 @@ delete :
 
 __WEAK void usbh_bluetooth_hci_read_callback(uint8_t *data, uint32_t len)
 {
+    (void)data;
+    (void)len;
 }
 
 __WEAK void usbh_bluetooth_run(struct usbh_bluetooth *bluetooth_class)
 {
+    (void)bluetooth_class;
 }
 
 __WEAK void usbh_bluetooth_stop(struct usbh_bluetooth *bluetooth_class)
 {
+    (void)bluetooth_class;
 }
 
 static const struct usbh_class_driver bluetooth_class_driver = {
diff --git a/class/wireless/usbh_rndis.c b/class/wireless/usbh_rndis.c
index 5e5b85fb..2b45fb1a 100644
--- a/class/wireless/usbh_rndis.c
+++ b/class/wireless/usbh_rndis.c
@@ -26,6 +26,7 @@ static struct usbh_rndis g_rndis_class;
 
 static int usbh_rndis_get_notification(struct usbh_rndis *rndis_class)
 {
+    (void)rndis_class;
     // int ret;
     // struct usbh_urb *urb = &rndis_class->intin_urb;
 
@@ -460,6 +461,8 @@ void usbh_rndis_rx_thread(void *argument)
     uint32_t transfer_size = (16 * 1024);
 #endif
 
+    (void)argument;
+
     USB_LOG_INFO("Create rndis rx thread\r\n");
     // clang-format off
 find_class:
@@ -581,10 +584,12 @@ int usbh_rndis_eth_output(uint32_t buflen)
 
 __WEAK void usbh_rndis_run(struct usbh_rndis *rndis_class)
 {
+    (void)rndis_class;
 }
 
 __WEAK void usbh_rndis_stop(struct usbh_rndis *rndis_class)
 {
+    (void)rndis_class;
 }
 
 static const struct usbh_class_driver rndis_class_driver = {
diff --git a/common/usb_log.h b/common/usb_log.h
index 9a0146de..9074ed97 100644
--- a/common/usb_log.h
+++ b/common/usb_log.h
@@ -86,7 +86,7 @@ void usb_assert(const char *filename, int linenum);
 static inline void usb_hexdump(const void *ptr, uint32_t buflen)
 {
     unsigned char *buf = (unsigned char *)ptr;
-    int i, j;
+    uint32_t i, j;
 
     for (i = 0; i < buflen; i += 16) {
         CONFIG_USB_PRINTF("%08X:", i);
diff --git a/core/usbd_core.c b/core/usbd_core.c
index 318e0267..8eda36f4 100644
--- a/core/usbd_core.c
+++ b/core/usbd_core.c
@@ -1186,6 +1186,8 @@ void usbd_event_ep0_in_complete_handler(uint8_t busid, uint8_t ep, uint32_t nbyt
 {
     struct usb_setup_packet *setup = &g_usbd_core[busid].setup;
 
+    (void)ep;
+
     g_usbd_core[busid].ep0_data_buf += nbytes;
     g_usbd_core[busid].ep0_data_buf_residue -= nbytes;
 
@@ -1225,6 +1227,8 @@ void usbd_event_ep0_out_complete_handler(uint8_t busid, uint8_t ep, uint32_t nby
 {
     struct usb_setup_packet *setup = &g_usbd_core[busid].setup;
 
+    (void)ep;
+
     if (nbytes > 0) {
         g_usbd_core[busid].ep0_data_buf += nbytes;
         g_usbd_core[busid].ep0_data_buf_residue -= nbytes;
diff --git a/core/usbd_core.h b/core/usbd_core.h
index ab7be7f1..f50432a7 100644
--- a/core/usbd_core.h
+++ b/core/usbd_core.h
@@ -72,7 +72,7 @@ struct usb_descriptor {
     const char *(*string_descriptor_callback)(uint8_t speed, uint8_t index);
     const struct usb_msosv1_descriptor *msosv1_descriptor;
     const struct usb_msosv2_descriptor *msosv2_descriptor;
-    const struct usb_webusb_url_ex_descriptor *webusb_url_descriptor;
+    const struct usb_webusb_descriptor *webusb_url_descriptor;
     const struct usb_bos_descriptor *bos_descriptor;
 };
 
diff --git a/demo/usb_host.c b/demo/usb_host.c
index 8c8ac22a..71984188 100644
--- a/demo/usb_host.c
+++ b/demo/usb_host.c
@@ -120,7 +120,7 @@ void usbh_hid_callback(void *arg, int nbytes)
     struct usbh_hid *hid_class = (struct usbh_hid *)arg;
 
     if (nbytes > 0) {
-        for (size_t i = 0; i < nbytes; i++) {
+        for (int i = 0; i < nbytes; i++) {
             USB_LOG_RAW("0x%02x ", hid_buffer[i]);
         }
         USB_LOG_RAW("nbytes:%d\r\n", nbytes);
diff --git a/osal/idf/usb_osal_idf.c b/osal/idf/usb_osal_idf.c
index f85aba2e..73cd306a 100644
--- a/osal/idf/usb_osal_idf.c
+++ b/osal/idf/usb_osal_idf.c
@@ -128,6 +128,7 @@ static void __usb_timeout(TimerHandle_t *handle)
 struct usb_osal_timer *usb_osal_timer_create(const char *name, uint32_t timeout_ms, usb_timer_handler_t handler, void *argument, bool is_period)
 {
     struct usb_osal_timer *timer;
+    (void)name;
 
     timer = pvPortMalloc(sizeof(struct usb_osal_timer));
 
diff --git a/osal/usb_osal_freertos.c b/osal/usb_osal_freertos.c
index 7f1aafad..490366a3 100644
--- a/osal/usb_osal_freertos.c
+++ b/osal/usb_osal_freertos.c
@@ -126,6 +126,7 @@ static void __usb_timeout(TimerHandle_t *handle)
 struct usb_osal_timer *usb_osal_timer_create(const char *name, uint32_t timeout_ms, usb_timer_handler_t handler, void *argument, bool is_period)
 {
     struct usb_osal_timer *timer;
+    (void)name;
 
     timer = pvPortMalloc(sizeof(struct usb_osal_timer));
 
diff --git a/osal/usb_osal_nuttx.c b/osal/usb_osal_nuttx.c
index 51018cd5..c62c7389 100644
--- a/osal/usb_osal_nuttx.c
+++ b/osal/usb_osal_nuttx.c
@@ -310,6 +310,9 @@ static void os_timer_callback(wdparm_t arg)
 struct usb_osal_timer *usb_osal_timer_create(const char *name, uint32_t timeout_ms, usb_timer_handler_t handler, void *argument, bool is_period)
 {
     struct timer_adpt *timer = kmm_malloc(sizeof(struct timer_adpt));
+
+    (void)name;
+
     if (!timer) {
         return NULL;
     }
diff --git a/osal/usb_osal_rtthread.c b/osal/usb_osal_rtthread.c
index 5b06fbf2..e8cbce3a 100644
--- a/osal/usb_osal_rtthread.c
+++ b/osal/usb_osal_rtthread.c
@@ -129,7 +129,7 @@ struct usb_osal_timer *usb_osal_timer_create(const char *name, uint32_t timeout_
     timer = rt_malloc(sizeof(struct usb_osal_timer));
     memset(timer, 0, sizeof(struct usb_osal_timer));
 
-    timer->timer = (void *)rt_timer_create("usb_tim", handler, argument, timeout_ms, is_period ? (RT_TIMER_FLAG_PERIODIC | RT_TIMER_FLAG_SOFT_TIMER) : (RT_TIMER_FLAG_ONE_SHOT | RT_TIMER_FLAG_SOFT_TIMER));
+    timer->timer = (void *)rt_timer_create(name, handler, argument, timeout_ms, is_period ? (RT_TIMER_FLAG_PERIODIC | RT_TIMER_FLAG_SOFT_TIMER) : (RT_TIMER_FLAG_ONE_SHOT | RT_TIMER_FLAG_SOFT_TIMER));
     if (timer->timer == NULL) {
         return NULL;
     }
diff --git a/platform/none/usbh_lwip.c b/platform/none/usbh_lwip.c
index ea26f747..9dd18822 100644
--- a/platform/none/usbh_lwip.c
+++ b/platform/none/usbh_lwip.c
@@ -114,6 +114,7 @@ struct netif g_cdc_ecm_netif;
 static err_t usbh_cdc_ecm_linkoutput(struct netif *netif, struct pbuf *p)
 {
     int ret;
+    (void)netif;
 
     usbh_lwip_eth_output_common(p, usbh_cdc_ecm_get_eth_txbuf());
     ret = usbh_cdc_ecm_eth_output(p->tot_len);
@@ -176,6 +177,8 @@ void usbh_cdc_ecm_run(struct usbh_cdc_ecm *cdc_ecm_class)
 void usbh_cdc_ecm_stop(struct usbh_cdc_ecm *cdc_ecm_class)
 {
     struct netif *netif = &g_cdc_ecm_netif;
+    (void)cdc_ecm_class;
+
 #if LWIP_DHCP
     dhcp_stop(netif);
     dhcp_cleanup(netif);
@@ -216,6 +219,7 @@ struct netif g_rndis_netif;
 static err_t usbh_rndis_linkoutput(struct netif *netif, struct pbuf *p)
 {
     int ret;
+    (void)netif;
 
     usbh_lwip_eth_output_common(p, usbh_rndis_get_eth_txbuf());
     ret = usbh_rndis_eth_output(p->tot_len);
@@ -281,6 +285,8 @@ void usbh_rndis_run(struct usbh_rndis *rndis_class)
 void usbh_rndis_stop(struct usbh_rndis *rndis_class)
 {
     struct netif *netif = &g_rndis_netif;
+    (void)rndis_class;
+
 #if LWIP_DHCP
     dhcp_stop(netif);
     dhcp_cleanup(netif);
@@ -302,6 +308,7 @@ struct netif g_cdc_ncm_netif;
 static err_t usbh_cdc_ncm_linkoutput(struct netif *netif, struct pbuf *p)
 {
     int ret;
+    (void)netif;
 
     usbh_lwip_eth_output_common(p, usbh_cdc_ncm_get_eth_txbuf());
     ret = usbh_cdc_ncm_eth_output(p->tot_len);
@@ -364,6 +371,8 @@ void usbh_cdc_ncm_run(struct usbh_cdc_ncm *cdc_ncm_class)
 void usbh_cdc_ncm_stop(struct usbh_cdc_ncm *cdc_ncm_class)
 {
     struct netif *netif = &g_cdc_ncm_netif;
+    (void)cdc_ncm_class;
+
 #if LWIP_DHCP
     dhcp_stop(netif);
     dhcp_cleanup(netif);
@@ -383,6 +392,7 @@ struct netif g_asix_netif;
 static err_t usbh_asix_linkoutput(struct netif *netif, struct pbuf *p)
 {
     int ret;
+    (void)netif;
 
     usbh_lwip_eth_output_common(p, usbh_asix_get_eth_txbuf());
     ret = usbh_asix_eth_output(p->tot_len);
@@ -445,6 +455,8 @@ void usbh_asix_run(struct usbh_asix *asix_class)
 void usbh_asix_stop(struct usbh_asix *asix_class)
 {
     struct netif *netif = &g_asix_netif;
+    (void)asix_class;
+
 #if LWIP_DHCP
     dhcp_stop(netif);
     dhcp_cleanup(netif);
@@ -464,6 +476,7 @@ struct netif g_rtl8152_netif;
 static err_t usbh_rtl8152_linkoutput(struct netif *netif, struct pbuf *p)
 {
     int ret;
+    (void)netif;
 
     usbh_lwip_eth_output_common(p, usbh_rtl8152_get_eth_txbuf());
     ret = usbh_rtl8152_eth_output(p->tot_len);
@@ -526,6 +539,8 @@ void usbh_rtl8152_run(struct usbh_rtl8152 *rtl8152_class)
 void usbh_rtl8152_stop(struct usbh_rtl8152 *rtl8152_class)
 {
     struct netif *netif = &g_rtl8152_netif;
+    (void)rtl8152_class;
+
 #if LWIP_DHCP
     dhcp_stop(netif);
     dhcp_cleanup(netif);
@@ -544,6 +559,7 @@ struct netif g_bl616_netif;
 static err_t usbh_bl616_linkoutput(struct netif *netif, struct pbuf *p)
 {
     int ret;
+    (void)netif;
 
     usbh_lwip_eth_output_common(p, usbh_bl616_get_eth_txbuf());
     ret = usbh_bl616_eth_output(p->tot_len);
@@ -583,6 +599,7 @@ void usbh_bl616_sta_disconnect_callback(void)
 
     netif_set_down(netif);
 }
+
 void usbh_bl616_sta_update_ip(uint8_t ip4_addr[4], uint8_t ip4_mask[4], uint8_t ip4_gw[4])
 {
     struct netif *netif = &g_bl616_netif;
@@ -593,6 +610,7 @@ void usbh_bl616_sta_update_ip(uint8_t ip4_addr[4], uint8_t ip4_mask[4], uint8_t
 
     netif_set_up(netif);
 }
+
 void usbh_bl616_run(struct usbh_bl616 *bl616_class)
 {
     struct netif *netif = &g_bl616_netif;
@@ -623,6 +641,8 @@ void usbh_bl616_stop(struct usbh_bl616 *bl616_class)
 {
     struct netif *netif = &g_bl616_netif;
 
+    (void)bl616_class;
+
     netif_set_down(netif);
     netif_remove(netif);
 }
diff --git a/platform/rtthread/usbh_lwip.c b/platform/rtthread/usbh_lwip.c
index 360a8489..074010af 100644
--- a/platform/rtthread/usbh_lwip.c
+++ b/platform/rtthread/usbh_lwip.c
@@ -118,6 +118,7 @@ static rt_err_t rt_usbh_cdc_ecm_control(rt_device_t dev, int cmd, void *args)
 static rt_err_t rt_usbh_cdc_ecm_eth_tx(rt_device_t dev, struct pbuf *p)
 {
     int ret;
+    (void)dev;
 
     usbh_lwip_eth_output_common(p, usbh_cdc_ecm_get_eth_txbuf());
     ret = usbh_cdc_ecm_eth_output(p->tot_len);
@@ -150,6 +151,8 @@ void usbh_cdc_ecm_run(struct usbh_cdc_ecm *cdc_ecm_class)
 
 void usbh_cdc_ecm_stop(struct usbh_cdc_ecm *cdc_ecm_class)
 {
+    (void)cdc_ecm_class;
+
     eth_device_deinit(&g_cdc_ecm_dev);
 }
 #endif
@@ -204,6 +207,7 @@ static rt_err_t rt_usbh_rndis_control(rt_device_t dev, int cmd, void *args)
 static rt_err_t rt_usbh_rndis_eth_tx(rt_device_t dev, struct pbuf *p)
 {
     int ret;
+    (void)dev;
 
     usbh_lwip_eth_output_common(p, usbh_rndis_get_eth_txbuf());
     ret = usbh_rndis_eth_output(p->tot_len);
@@ -237,6 +241,8 @@ void usbh_rndis_run(struct usbh_rndis *rndis_class)
 
 void usbh_rndis_stop(struct usbh_rndis *rndis_class)
 {
+    (void)rndis_class;
+
     eth_device_deinit(&g_rndis_dev);
     // rt_timer_stop(keep_timer);
     // rt_timer_delete(keep_timer);
@@ -273,6 +279,7 @@ static rt_err_t rt_usbh_cdc_ncm_control(rt_device_t dev, int cmd, void *args)
 static rt_err_t rt_usbh_cdc_ncm_eth_tx(rt_device_t dev, struct pbuf *p)
 {
     int ret;
+    (void)dev;
 
     usbh_lwip_eth_output_common(p, usbh_cdc_ncm_get_eth_txbuf());
     ret = usbh_cdc_ncm_eth_output(p->tot_len);
@@ -305,6 +312,8 @@ void usbh_cdc_ncm_run(struct usbh_cdc_ncm *cdc_ncm_class)
 
 void usbh_cdc_ncm_stop(struct usbh_cdc_ncm *cdc_ncm_class)
 {
+    (void)cdc_ncm_class;
+
     eth_device_deinit(&g_cdc_ncm_dev);
 }
 #endif
@@ -339,6 +348,7 @@ static rt_err_t rt_usbh_asix_control(rt_device_t dev, int cmd, void *args)
 static rt_err_t rt_usbh_asix_eth_tx(rt_device_t dev, struct pbuf *p)
 {
     int ret;
+    (void)dev;
 
     usbh_lwip_eth_output_common(p, usbh_asix_get_eth_txbuf());
     ret = usbh_asix_eth_output(p->tot_len);
@@ -371,6 +381,8 @@ void usbh_asix_run(struct usbh_asix *asix_class)
 
 void usbh_asix_stop(struct usbh_asix *asix_class)
 {
+    (void)asix_class;
+
     eth_device_deinit(&g_asix_dev);
 }
 #endif
@@ -405,6 +417,7 @@ static rt_err_t rt_usbh_rtl8152_control(rt_device_t dev, int cmd, void *args)
 static rt_err_t rt_usbh_rtl8152_eth_tx(rt_device_t dev, struct pbuf *p)
 {
     int ret;
+    (void)dev;
 
     usbh_lwip_eth_output_common(p, usbh_rtl8152_get_eth_txbuf());
     ret = usbh_rtl8152_eth_output(p->tot_len);
@@ -437,6 +450,8 @@ void usbh_rtl8152_run(struct usbh_rtl8152 *rtl8152_class)
 
 void usbh_rtl8152_stop(struct usbh_rtl8152 *rtl8152_class)
 {
+    (void)rtl8152_class;
+
     eth_device_deinit(&g_rtl8152_dev);
 }
 #endif
diff --git a/port/dwc2/usb_hc_dwc2.c b/port/dwc2/usb_hc_dwc2.c
index d9c42261..3171f60e 100644
--- a/port/dwc2/usb_hc_dwc2.c
+++ b/port/dwc2/usb_hc_dwc2.c
@@ -442,10 +442,12 @@ static void dwc2_iso_urb_init(struct usbh_bus *bus, uint8_t chidx, struct usbh_u
 
 __WEAK void usb_hc_low_level_init(struct usbh_bus *bus)
 {
+    (void)bus;
 }
 
 __WEAK void usb_hc_low_level_deinit(struct usbh_bus *bus)
 {
+    (void)bus;
 }
 
 int usb_hc_init(struct usbh_bus *bus)
diff --git a/port/ehci/usb_hc_ehci.c b/port/ehci/usb_hc_ehci.c
index cade2dde..2e75fae6 100644
--- a/port/ehci/usb_hc_ehci.c
+++ b/port/ehci/usb_hc_ehci.c
@@ -167,6 +167,7 @@ static void ehci_qh_fill(struct ehci_qh_hw *qh,
     switch (speed) {
         case USB_SPEED_LOW:
             epchar |= QH_EPCHAR_EPS_LOW;
+            __attribute__((fallthrough));
         case USB_SPEED_FULL:
             if (ep_type == USB_ENDPOINT_TYPE_CONTROL) {
                 epchar |= QH_EPCHAR_C; /* for TT */
@@ -379,7 +380,7 @@ static struct ehci_qh_hw *ehci_bulk_urb_init(struct usbh_bus *bus, struct usbh_u
                  urb->hport->parent->hub_addr,
                  urb->hport->port);
 
-    while (buflen >= 0) {
+    while (1) {
         qtd = &qh->qtd_pool[qtd_num];
 
         if (buflen > 0x4000) {
@@ -480,7 +481,7 @@ static struct ehci_qh_hw *ehci_intr_urb_init(struct usbh_bus *bus, struct usbh_u
                  urb->hport->parent->hub_addr,
                  urb->hport->port);
 
-    while (buflen >= 0) {
+    while (1) {
         qtd = &qh->qtd_pool[qtd_num];
 
         if (buflen > 0x4000) {
@@ -583,6 +584,8 @@ static void ehci_qh_scan_qtds(struct usbh_bus *bus, struct ehci_qh_hw *qhead, st
 {
     struct ehci_qtd_hw *qtd;
 
+    (void)bus;
+
     ehci_qh_remove(qhead, qh);
 
     qtd = EHCI_ADDR2QTD(qh->first_qtd);
@@ -655,6 +658,8 @@ static void ehci_kill_qh(struct usbh_bus *bus, struct ehci_qh_hw *qhead, struct
 {
     struct ehci_qtd_hw *qtd;
 
+    (void)bus;
+
     ehci_qh_remove(qhead, qh);
 
     qtd = EHCI_ADDR2QTD(qh->first_qtd);
@@ -697,14 +702,17 @@ static int usbh_reset_port(struct usbh_bus *bus, const uint8_t port)
 
 __WEAK void usb_hc_low_level_init(struct usbh_bus *bus)
 {
+    (void)bus;
 }
 
 __WEAK void usb_hc_low_level2_init(struct usbh_bus *bus)
 {
+    (void)bus;
 }
 
 __WEAK void usb_hc_low_level_deinit(struct usbh_bus *bus)
 {
+    (void)bus;
 }
 
 int usb_hc_init(struct usbh_bus *bus)
diff --git a/port/musb/usb_hc_musb.c b/port/musb/usb_hc_musb.c
index 131dbb52..39c787f8 100644
--- a/port/musb/usb_hc_musb.c
+++ b/port/musb/usb_hc_musb.c
@@ -475,10 +475,12 @@ static void musb_pipe_free(struct musb_pipe *pipe)
 
 __WEAK void usb_hc_low_level_init(struct usbh_bus *bus)
 {
+    (void)bus;
 }
 
 __WEAK void usb_hc_low_level_deinit(struct usbh_bus *bus)
 {
+    (void)bus;
 }
 
 int usb_hc_init(struct usbh_bus *bus)