Merge branch 'master' into rp2040-hcd-bulk

18 files changed, 108 insertions, 836 deletions

diff --git a/examples/host/bare_api/CMakeLists.txt b/examples/host/bare_api/CMakeLists.txt
index bff281a8c..bc04b01a7 100644
--- a/examples/host/bare_api/CMakeLists.txt
+++ b/examples/host/bare_api/CMakeLists.txt
@@ -24,4 +24,7 @@ target_include_directories(${PROJECT} PUBLIC
 
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
-family_configure_host_example(${PROJECT})
\ No newline at end of file
+family_configure_host_example(${PROJECT})
+
+# For rp2040, un-comment to enable pico-pio-usb
+# family_add_pico_pio_usb(${PROJECT})
\ No newline at end of file
diff --git a/examples/host/bare_api/only.txt b/examples/host/bare_api/only.txt
index 7fe4e3f5c..fa9c14857 100644
--- a/examples/host/bare_api/only.txt
+++ b/examples/host/bare_api/only.txt
@@ -3,7 +3,9 @@ mcu:LPC177X_8X
 mcu:LPC18XX
 mcu:LPC40XX
 mcu:LPC43XX
+mcu:MIMXRT
 mcu:MIMXRT10XX
+mcu:MIMXRT11XX
 mcu:RP2040
 mcu:MSP432E4
 mcu:RX65X
diff --git a/examples/host/bare_api/src/main.c b/examples/host/bare_api/src/main.c
index eb3f7d8d7..51cab2de0 100644
--- a/examples/host/bare_api/src/main.c
+++ b/examples/host/bare_api/src/main.c
@@ -62,8 +62,10 @@ int main(void)
 {
   board_init();
 
-  printf("TinyUSB Host HID Controller Example\r\n");
-  tusb_init();
+  printf("TinyUSB Bare API Example\r\n");
+
+  // init host stack on configured roothub port
+  tuh_init(BOARD_TUH_RHPORT);
 
   while (1)
   {
@@ -82,8 +84,8 @@ void tuh_mount_cb (uint8_t daddr)
 {
   printf("Device attached, address = %d\r\n", daddr);
 
-  // Get Device Descriptor sync API
-  // TODO: invoking control trannsfer now has issue with mounting hub with multiple devices attached, fix later
+  // Get Device Descriptor
+  // TODO: invoking control transfer now has issue with mounting hub with multiple devices attached, fix later
   tuh_descriptor_get_device(daddr, &desc_device, 18, print_device_descriptor, 0);
 }
 
@@ -187,7 +189,7 @@ void parse_config_descriptor(uint8_t dev_addr, tusb_desc_configuration_t const*
     if( TUSB_DESC_INTERFACE != tu_desc_type(p_desc) ) return;
     tusb_desc_interface_t const* desc_itf = (tusb_desc_interface_t const*) p_desc;
 
-    uint16_t const drv_len = count_interface_total_len(desc_itf, assoc_itf_count, desc_end-p_desc);
+    uint16_t const drv_len = count_interface_total_len(desc_itf, assoc_itf_count, (uint16_t) (desc_end-p_desc));
 
     // probably corrupted descriptor
     if(drv_len < sizeof(tusb_desc_interface_t)) return;
@@ -242,7 +244,8 @@ void hid_report_received(tuh_xfer_t* xfer);
 void open_hid_interface(uint8_t daddr, tusb_desc_interface_t const *desc_itf, uint16_t max_len)
 {
   // len = interface + hid + n*endpoints
-  uint16_t const drv_len = sizeof(tusb_desc_interface_t) + sizeof(tusb_hid_descriptor_hid_t) + desc_itf->bNumEndpoints*sizeof(tusb_desc_endpoint_t);
+  uint16_t const drv_len = (uint16_t) (sizeof(tusb_desc_interface_t) + sizeof(tusb_hid_descriptor_hid_t) +
+                                       desc_itf->bNumEndpoints * sizeof(tusb_desc_endpoint_t));
 
   // corrupted descriptor
   if (max_len < drv_len) return;
@@ -375,7 +378,7 @@ static void _convert_utf16le_to_utf8(const uint16_t *utf16, size_t utf16_len, ui
     for (size_t i = 0; i < utf16_len; i++) {
         uint16_t chr = utf16[i];
         if (chr < 0x80) {
-            *utf8++ = chr & 0xff;
+            *utf8++ = chr & 0xffu;
         } else if (chr < 0x800) {
             *utf8++ = (uint8_t)(0xC0 | (chr >> 6 & 0x1F));
             *utf8++ = (uint8_t)(0x80 | (chr >> 0 & 0x3F));
@@ -403,12 +406,12 @@ static int _count_utf8_bytes(const uint16_t *buf, size_t len) {
         }
         // TODO: Handle UTF-16 code points that take two entries.
     }
-    return total_bytes;
+    return (int) total_bytes;
 }
 
 static void print_utf16(uint16_t *temp_buf, size_t buf_len) {
     size_t utf16_len = ((temp_buf[0] & 0xff) - 2) / sizeof(uint16_t);
-    size_t utf8_len = _count_utf8_bytes(temp_buf + 1, utf16_len);
+    size_t utf8_len = (size_t) _count_utf8_bytes(temp_buf + 1, utf16_len);
     _convert_utf16le_to_utf8(temp_buf + 1, utf16_len, (uint8_t *) temp_buf, sizeof(uint16_t) * buf_len);
     ((uint8_t*) temp_buf)[utf8_len] = '\0';
 
diff --git a/examples/host/bare_api/src/tusb_config.h b/examples/host/bare_api/src/tusb_config.h
index 9b789290d..ed0aaf7da 100644
--- a/examples/host/bare_api/src/tusb_config.h
+++ b/examples/host/bare_api/src/tusb_config.h
@@ -30,27 +30,42 @@
  extern "C" {
 #endif
 
+//--------------------------------------------------------------------+
+// Board Specific Configuration
+//--------------------------------------------------------------------+
+
+// RHPort number used for host can be defined by board.mk, default to port 0
+#ifndef BOARD_TUH_RHPORT
+#define BOARD_TUH_RHPORT      0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUH_MAX_SPEED
+#define BOARD_TUH_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+#endif
+
 //--------------------------------------------------------------------
 // COMMON CONFIGURATION
 //--------------------------------------------------------------------
 
 // defined by compiler flags for flexibility
 #ifndef CFG_TUSB_MCU
-  #error CFG_TUSB_MCU must be defined
+#error CFG_TUSB_MCU must be defined
 #endif
 
-#if CFG_TUSB_MCU == OPT_MCU_LPC43XX || CFG_TUSB_MCU == OPT_MCU_LPC18XX || CFG_TUSB_MCU == OPT_MCU_MIMXRT10XX
-  #define CFG_TUSB_RHPORT0_MODE       (OPT_MODE_HOST | OPT_MODE_HIGH_SPEED)
-#else
-  #define CFG_TUSB_RHPORT0_MODE       OPT_MODE_HOST
+#ifndef CFG_TUSB_OS
+#define CFG_TUSB_OS           OPT_OS_NONE
 #endif
 
-#ifndef CFG_TUSB_OS
-#define CFG_TUSB_OS                 OPT_OS_NONE
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG        0
 #endif
 
-// CFG_TUSB_DEBUG is defined by compiler in DEBUG build
-// #define CFG_TUSB_DEBUG           0
+// Enable Host stack
+#define CFG_TUH_ENABLED       1
+
+// Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUH_MAX_SPEED     BOARD_TUH_MAX_SPEED
 
 /* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
  * Tinyusb use follows macros to declare transferring memory so that they can be put
diff --git a/examples/host/cdc_msc_hid/CMakeLists.txt b/examples/host/cdc_msc_hid/CMakeLists.txt
index 0a99bc3a9..c4a4d8e63 100644
--- a/examples/host/cdc_msc_hid/CMakeLists.txt
+++ b/examples/host/cdc_msc_hid/CMakeLists.txt
@@ -26,4 +26,7 @@ target_include_directories(${PROJECT} PUBLIC
 
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
-family_configure_host_example(${PROJECT})
\ No newline at end of file
+family_configure_host_example(${PROJECT})
+
+# For rp2040, un-comment to enable pico-pio-usb
+# family_add_pico_pio_usb(${PROJECT})
diff --git a/examples/host/cdc_msc_hid/only.txt b/examples/host/cdc_msc_hid/only.txt
index 7fe4e3f5c..fa9c14857 100644
--- a/examples/host/cdc_msc_hid/only.txt
+++ b/examples/host/cdc_msc_hid/only.txt
@@ -3,7 +3,9 @@ mcu:LPC177X_8X
 mcu:LPC18XX
 mcu:LPC40XX
 mcu:LPC43XX
+mcu:MIMXRT
 mcu:MIMXRT10XX
+mcu:MIMXRT11XX
 mcu:RP2040
 mcu:MSP432E4
 mcu:RX65X
diff --git a/examples/host/cdc_msc_hid/src/main.c b/examples/host/cdc_msc_hid/src/main.c
index 0fc7ef146..664cbf035 100644
--- a/examples/host/cdc_msc_hid/src/main.c
+++ b/examples/host/cdc_msc_hid/src/main.c
@@ -45,7 +45,8 @@ int main(void)
 
   printf("TinyUSB Host CDC MSC HID Example\r\n");
 
-  tusb_init();
+  // init host stack on configured roothub port
+  tuh_init(BOARD_TUH_RHPORT);
 
   while (1)
   {
diff --git a/examples/host/cdc_msc_hid/src/tusb_config.h b/examples/host/cdc_msc_hid/src/tusb_config.h
index bc6c68e5b..33f34315b 100644
--- a/examples/host/cdc_msc_hid/src/tusb_config.h
+++ b/examples/host/cdc_msc_hid/src/tusb_config.h
@@ -30,27 +30,42 @@
  extern "C" {
 #endif
 
+//--------------------------------------------------------------------+
+// Board Specific Configuration
+//--------------------------------------------------------------------+
+
+// RHPort number used for host can be defined by board.mk, default to port 0
+#ifndef BOARD_TUH_RHPORT
+#define BOARD_TUH_RHPORT      0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUH_MAX_SPEED
+#define BOARD_TUH_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+#endif
+
 //--------------------------------------------------------------------
 // COMMON CONFIGURATION
 //--------------------------------------------------------------------
 
 // defined by compiler flags for flexibility
 #ifndef CFG_TUSB_MCU
-  #error CFG_TUSB_MCU must be defined
+#error CFG_TUSB_MCU must be defined
 #endif
 
-#if CFG_TUSB_MCU == OPT_MCU_LPC43XX || CFG_TUSB_MCU == OPT_MCU_LPC18XX || CFG_TUSB_MCU == OPT_MCU_MIMXRT10XX
-  #define CFG_TUSB_RHPORT0_MODE       (OPT_MODE_HOST | OPT_MODE_HIGH_SPEED)
-#else
-  #define CFG_TUSB_RHPORT0_MODE       OPT_MODE_HOST
+#ifndef CFG_TUSB_OS
+#define CFG_TUSB_OS           OPT_OS_NONE
 #endif
 
-#ifndef CFG_TUSB_OS
-#define CFG_TUSB_OS                 OPT_OS_NONE
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG        0
 #endif
 
-// CFG_TUSB_DEBUG is defined by compiler in DEBUG build
-// #define CFG_TUSB_DEBUG           0
+// Enable Host stack
+#define CFG_TUH_ENABLED       1
+
+// Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUH_MAX_SPEED     BOARD_TUH_MAX_SPEED
 
 /* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
  * Tinyusb use follows macros to declare transferring memory so that they can be put
@@ -74,7 +89,7 @@
 // Size of buffer to hold descriptors and other data used for enumeration
 #define CFG_TUH_ENUMERATION_BUFSIZE 256
 
-#define CFG_TUH_HUB                 1
+#define CFG_TUH_HUB                 1 // number of supported hubs
 #define CFG_TUH_CDC                 1
 #define CFG_TUH_HID                 4 // typical keyboard + mouse device can have 3-4 HID interfaces
 #define CFG_TUH_MSC                 1
diff --git a/examples/host/hid_controller/CMakeLists.txt b/examples/host/hid_controller/CMakeLists.txt
index aaf8bc34f..6153d399a 100644
--- a/examples/host/hid_controller/CMakeLists.txt
+++ b/examples/host/hid_controller/CMakeLists.txt
@@ -25,4 +25,7 @@ target_include_directories(${PROJECT} PUBLIC
 
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
-family_configure_host_example(${PROJECT})
\ No newline at end of file
+family_configure_host_example(${PROJECT})
+
+# For rp2040, un-comment to enable pico-pio-usb
+# family_add_pico_pio_usb(${PROJECT})
diff --git a/examples/host/hid_controller/only.txt b/examples/host/hid_controller/only.txt
index 7fe4e3f5c..fa9c14857 100644
--- a/examples/host/hid_controller/only.txt
+++ b/examples/host/hid_controller/only.txt
@@ -3,7 +3,9 @@ mcu:LPC177X_8X
 mcu:LPC18XX
 mcu:LPC40XX
 mcu:LPC43XX
+mcu:MIMXRT
 mcu:MIMXRT10XX
+mcu:MIMXRT11XX
 mcu:RP2040
 mcu:MSP432E4
 mcu:RX65X
diff --git a/examples/host/hid_controller/src/main.c b/examples/host/hid_controller/src/main.c
index b9b37a4d2..299a3ff10 100644
--- a/examples/host/hid_controller/src/main.c
+++ b/examples/host/hid_controller/src/main.c
@@ -49,9 +49,10 @@ int main(void)
   board_init();
 
   printf("TinyUSB Host HID Controller Example\r\n");
-  printf("Note: Events only displayed for explictly supported controllers\r\n");
+  printf("Note: Events only displayed for explicit supported controllers\r\n");
 
-  tusb_init();
+  // init host stack on configured roothub port
+  tuh_init(BOARD_TUH_RHPORT);
 
   while (1)
   {
diff --git a/examples/host/hid_controller/src/tusb_config.h b/examples/host/hid_controller/src/tusb_config.h
index 74b471ae4..475b9ca8f 100644
--- a/examples/host/hid_controller/src/tusb_config.h
+++ b/examples/host/hid_controller/src/tusb_config.h
@@ -30,27 +30,42 @@
  extern "C" {
 #endif
 
+//--------------------------------------------------------------------+
+// Board Specific Configuration
+//--------------------------------------------------------------------+
+
+// RHPort number used for host can be defined by board.mk, default to port 0
+#ifndef BOARD_TUH_RHPORT
+#define BOARD_TUH_RHPORT      0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUH_MAX_SPEED
+#define BOARD_TUH_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+#endif
+
 //--------------------------------------------------------------------
 // COMMON CONFIGURATION
 //--------------------------------------------------------------------
 
 // defined by compiler flags for flexibility
 #ifndef CFG_TUSB_MCU
-  #error CFG_TUSB_MCU must be defined
+#error CFG_TUSB_MCU must be defined
 #endif
 
-#if CFG_TUSB_MCU == OPT_MCU_LPC43XX || CFG_TUSB_MCU == OPT_MCU_LPC18XX || CFG_TUSB_MCU == OPT_MCU_MIMXRT10XX
-  #define CFG_TUSB_RHPORT0_MODE       (OPT_MODE_HOST | OPT_MODE_HIGH_SPEED)
-#else
-  #define CFG_TUSB_RHPORT0_MODE       OPT_MODE_HOST
+#ifndef CFG_TUSB_OS
+#define CFG_TUSB_OS           OPT_OS_NONE
 #endif
 
-#ifndef CFG_TUSB_OS
-#define CFG_TUSB_OS                 OPT_OS_NONE
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG        0
 #endif
 
-// CFG_TUSB_DEBUG is defined by compiler in DEBUG build
-// #define CFG_TUSB_DEBUG           0
+// Enable Host stack
+#define CFG_TUH_ENABLED       1
+
+// Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUH_MAX_SPEED     BOARD_TUH_MAX_SPEED
 
 /* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
  * Tinyusb use follows macros to declare transferring memory so that they can be put
diff --git a/examples/host/hid_to_cdc/CMakeLists.txt b/examples/host/hid_to_cdc/CMakeLists.txt
deleted file mode 100644
index abc4d91da..000000000
--- a/examples/host/hid_to_cdc/CMakeLists.txt
+++ /dev/null
@@ -1,28 +0,0 @@
-cmake_minimum_required(VERSION 3.5)
-
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
-
-# gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
-family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
-
-project(${PROJECT})
-
-# Checks this example is valid for the family and initializes the project
-family_initialize_project(${PROJECT} ${CMAKE_CURRENT_LIST_DIR})
-
-add_executable(${PROJECT})
-
-# Example source
-target_sources(${PROJECT} PUBLIC
-        ${CMAKE_CURRENT_SOURCE_DIR}/src/main.c
-        ${CMAKE_CURRENT_SOURCE_DIR}/src/usb_descriptors.c
-        )
-
-# Example include
-target_include_directories(${PROJECT} PUBLIC
-        ${CMAKE_CURRENT_SOURCE_DIR}/src
-        )
-
-# Configure compilation flags and libraries for the example... see the corresponding function
-# in hw/bsp/FAMILY/family.cmake for details.
-family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/host/hid_to_cdc/Makefile b/examples/host/hid_to_cdc/Makefile
deleted file mode 100644
index 3fe9b0888..000000000
--- a/examples/host/hid_to_cdc/Makefile
+++ /dev/null
@@ -1,19 +0,0 @@
-include ../../../tools/top.mk
-include ../../make.mk
-
-INC += \
-	src \
-	$(TOP)/hw \
-
-# Example source
-EXAMPLE_SOURCE += $(wildcard src/*.c)
-SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
-
-CFLAGS += -Wno-error=cast-align -Wno-error=null-dereference
-
-SRC_C += \
-	src/class/hid/hid_host.c \
-	src/host/hub.c \
-	src/host/usbh.c
-
-include ../../rules.mk
diff --git a/examples/host/hid_to_cdc/only.txt b/examples/host/hid_to_cdc/only.txt
deleted file mode 100644
index 78d94e3ce..000000000
--- a/examples/host/hid_to_cdc/only.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-board:mimxrt1060_evk
-board:mimxrt1064_evk
diff --git a/examples/host/hid_to_cdc/src/main.c b/examples/host/hid_to_cdc/src/main.c
deleted file mode 100644
index cdf5d264e..000000000
--- a/examples/host/hid_to_cdc/src/main.c
+++ /dev/null
@@ -1,315 +0,0 @@
-/* 
- * The MIT License (MIT)
- *
- * Copyright (c) 2019 Ha Thach (tinyusb.org)
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- */
-
-// This example runs both host and device concurrently. The USB host looks for
-// any HID device with reports that are 8 bytes long and then assumes they are
-// keyboard reports. It translates the keypresses of the reports to ASCII and
-// transmits it over CDC to the device's host.
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-#include "bsp/board.h"
-#include "tusb.h"
-
-//--------------------------------------------------------------------+
-// MACRO CONSTANT TYPEDEF PROTYPES
-//--------------------------------------------------------------------+
-
-// uncomment if you are using colemak layout
-// #define KEYBOARD_COLEMAK
-
-#ifdef KEYBOARD_COLEMAK
-const uint8_t colemak[128] = {
-  0  ,  0,  0,  0,  0,  0,  0, 22,
-  9  , 23,  7,  0, 24, 17,  8, 12,
-  0  , 14, 28, 51,  0, 19, 21, 10,
-  15 ,  0,  0,  0, 13,  0,  0,  0,
-  0  ,  0,  0,  0,  0,  0,  0,  0,
-  0  ,  0,  0,  0,  0,  0,  0,  0,
-  0  ,  0,  0, 18,  0,  0,  0,  0,
-  0  ,  0,  0,  0,  0,  0,  0,  0,
-  0  ,  0,  0,  0,  0,  0,  0,  0,
-  0  ,  0,  0,  0,  0,  0,  0,  0
-};
-#endif
-
-static uint8_t const keycode2ascii[128][2] =  { HID_KEYCODE_TO_ASCII };
-
-/* Blink pattern
- * - 250 ms  : device not mounted
- * - 1000 ms : device mounted
- * - 2500 ms : device is suspended
- */
-enum  {
-  BLINK_NOT_MOUNTED = 250,
-  BLINK_MOUNTED = 1000,
-  BLINK_SUSPENDED = 2500,
-};
-
-static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED;
-
-void led_blinking_task(void);
-void cdc_task(void);
-
-/*------------- MAIN -------------*/
-int main(void)
-{
-  board_init();
-  tusb_init();
-
-  while (1)
-  {
-    tud_task(); // tinyusb device task
-    tuh_task(); // tinyusb host task
-    led_blinking_task();
-
-    cdc_task();
-  }
-
-  return 0;
-}
-
-//--------------------------------------------------------------------+
-// Device callbacks
-//--------------------------------------------------------------------+
-
-// Invoked when device is mounted
-void tud_mount_cb(void)
-{
-  blink_interval_ms = BLINK_MOUNTED;
-}
-
-// Invoked when device is unmounted
-void tud_umount_cb(void)
-{
-  blink_interval_ms = BLINK_NOT_MOUNTED;
-}
-
-// Invoked when usb bus is suspended
-// remote_wakeup_en : if host allow us  to perform remote wakeup
-// Within 7ms, device must draw an average of current less than 2.5 mA from bus
-void tud_suspend_cb(bool remote_wakeup_en)
-{
-  (void) remote_wakeup_en;
-  blink_interval_ms = BLINK_SUSPENDED;
-}
-
-// Invoked when usb bus is resumed
-void tud_resume_cb(void)
-{
-  blink_interval_ms = BLINK_MOUNTED;
-}
-
-//--------------------------------------------------------------------+
-// Host callbacks
-//--------------------------------------------------------------------+
-
-// Invoked when device with hid interface is mounted
-// Report descriptor is also available for use. tuh_hid_parse_report_descriptor()
-// can be used to parse common/simple enough descriptor.
-// Note: if report descriptor length > CFG_TUH_ENUMERATION_BUFSIZE, it will be skipped
-// therefore report_desc = NULL, desc_len = 0
-void tuh_hid_mount_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_report, uint16_t desc_len)
-{
-  (void)desc_report;
-  (void)desc_len;
-  uint16_t vid, pid;
-  tuh_vid_pid_get(dev_addr, &vid, &pid);
-
-  printf("HID device address = %d, instance = %d is mounted\r\n", dev_addr, instance);
-  printf("VID = %04x, PID = %04x\r\n", vid, pid);
-
-  // Receive any report and treat it like a keyboard.
-  // tuh_hid_report_received_cb() will be invoked when report is available
-  if ( !tuh_hid_receive_report(dev_addr, instance) )
-  {
-    printf("Error: cannot request to receive report\r\n");
-  }
-}
-
-// Invoked when device with hid interface is un-mounted
-void tuh_hid_umount_cb(uint8_t dev_addr, uint8_t instance)
-{
-  printf("HID device address = %d, instance = %d is unmounted\r\n", dev_addr, instance);
-}
-
-// keycodes from last report to check if key is holding or newly pressed
-uint8_t last_keycodes[6] = {0};
-
-// look up new key in previous keys
-static inline bool key_in_last_report(const uint8_t key_arr[6], uint8_t keycode)
-{
-  for(uint8_t i=0; i<6; i++)
-  {
-    if (key_arr[i] == keycode) return true;
-  }
-
-  return false;
-}
-
-// Invoked when received report from device via interrupt endpoint
-void tuh_hid_report_received_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len)
-{
-  if (len != 8)
-  {
-    char ch_num;
-
-    tud_cdc_write_str("incorrect report len: ");
-
-    if ( len > 10 )
-    {
-      ch_num = '0' + (len / 10);
-      tud_cdc_write(&ch_num, 1);
-      len = len % 10;
-    }
-
-    ch_num = '0' + len;
-    tud_cdc_write(&ch_num, 1);
-
-    tud_cdc_write_str("\r\n");
-    tud_cdc_write_flush();
-
-    // Don't request a new report for a wrong sized endpoint.
-    return;
-  }
-
-  uint8_t const modifiers = report[0];
-  bool flush = false;
-
-  for (int i = 2; i < 8; i++)
-  {
-    uint8_t keycode = report[i];
-
-    if (keycode)
-    {
-      if ( key_in_last_report(last_keycodes, keycode) )
-      {
-        // exist in previous report means the current key is holding
-        // do nothing
-      }else
-      {
-        // not existed in previous report means the current key is pressed
-        // Only print keycodes 0 - 128.
-        if (keycode < 128)
-        {
-          // remap the key code for Colemak layout so @tannewt can type.
-          #ifdef KEYBOARD_COLEMAK
-          uint8_t colemak_key_code = colemak[keycode];
-          if (colemak_key_code != 0) keycode = colemak_key_code;
-          #endif
-
-          bool const is_shift = modifiers & (KEYBOARD_MODIFIER_LEFTSHIFT | KEYBOARD_MODIFIER_RIGHTSHIFT);
-          char c = keycode2ascii[keycode][is_shift ? 1 : 0];
-          if (c)
-          {
-            if (c == '\n') tud_cdc_write("\r", 1);
-            tud_cdc_write(&c, 1);
-            flush = true;
-          }
-        }
-      }
-    }
-  }
-
-  if (flush) tud_cdc_write_flush();
-
-  // save current report
-  memcpy(last_keycodes, report+2, 6);
-
-  // continue to request to receive report
-  if ( !tuh_hid_receive_report(dev_addr, instance) )
-  {
-    printf("Error: cannot request to receive report\r\n");
-  }
-}
-
-
-
-//--------------------------------------------------------------------+
-// USB CDC
-//--------------------------------------------------------------------+
-void cdc_task(void)
-{
-  // connected() check for DTR bit
-  // Most but not all terminal client set this when making connection
-  // if ( tud_cdc_connected() )
-  {
-    // connected and there are data available
-    if ( tud_cdc_available() )
-    {
-      // read datas
-      char buf[64];
-      uint32_t count = tud_cdc_read(buf, sizeof(buf));
-      (void) count;
-
-      // Echo back
-      // Note: Skip echo by commenting out write() and write_flush()
-      // for throughput test e.g
-      //    $ dd if=/dev/zero of=/dev/ttyACM0 count=10000
-      tud_cdc_write(buf, count);
-      tud_cdc_write_flush();
-    }
-  }
-}
-
-// Invoked when cdc when line state changed e.g connected/disconnected
-void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
-{
-  (void) itf;
-  (void) rts;
-
-  // TODO set some indicator
-  if ( dtr )
-  {
-    // Terminal connected
-  }else
-  {
-    // Terminal disconnected
-  }
-}
-
-// Invoked when CDC interface received data from host
-void tud_cdc_rx_cb(uint8_t itf)
-{
-  (void) itf;
-}
-
-//--------------------------------------------------------------------+
-// BLINKING TASK
-//--------------------------------------------------------------------+
-void led_blinking_task(void)
-{
-  static uint32_t start_ms = 0;
-  static bool led_state = false;
-
-  // Blink every interval ms
-  if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time
-  start_ms += blink_interval_ms;
-
-  board_led_write(led_state);
-  led_state = 1 - led_state; // toggle
-}
diff --git a/examples/host/hid_to_cdc/src/tusb_config.h b/examples/host/hid_to_cdc/src/tusb_config.h
deleted file mode 100644
index 9a35ffc30..000000000
--- a/examples/host/hid_to_cdc/src/tusb_config.h
+++ /dev/null
@@ -1,163 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2019 Ha Thach (tinyusb.org)
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- */
-
-#ifndef _TUSB_CONFIG_H_
-#define _TUSB_CONFIG_H_
-
-#ifdef __cplusplus
- extern "C" {
-#endif
-
-//--------------------------------------------------------------------
-// COMMON CONFIGURATION
-//--------------------------------------------------------------------
-
-// defined by board.mk
-#ifndef CFG_TUSB_MCU
-  #error CFG_TUSB_MCU must be defined
-#endif
-
-// RHPort number used for device can be defined by board.mk, default to port 0
-#ifndef BOARD_DEVICE_RHPORT_NUM
-  #define BOARD_DEVICE_RHPORT_NUM     0
-#endif
-
-// RHPort number used for device can be defined by board.mk, default to port 1
-#ifndef BOARD_HOST_RHPORT_NUM
-  #define BOARD_HOST_RHPORT_NUM     1
-#endif
-
-// RHPort max operational speed can defined by board.mk
-// Default to Highspeed for MCU with internal HighSpeed PHY (can be port specific), otherwise FullSpeed
-#ifndef BOARD_DEVICE_RHPORT_SPEED
-  #if TU_CHECK_MCU(OPT_MCU_LPC18XX, OPT_MCU_LPC43XX, OPT_MCU_MIMXRT10XX, OPT_MCU_NUC505) ||\
-      TU_CHECK_MCU(OPT_MCU_CXD56, OPT_MCU_SAMX7X, OPT_MCU_BCM2711) ||\
-      TU_CHECK_MCU(OPT_MCU_FT90X, OPT_MCU_FT93X)
-    #define BOARD_DEVICE_RHPORT_SPEED   OPT_MODE_HIGH_SPEED
-  #else
-    #define BOARD_DEVICE_RHPORT_SPEED   OPT_MODE_FULL_SPEED
-  #endif
-#endif
-
-// RHPort max operational speed can defined by board.mk
-// Default to Highspeed for MCU with internal HighSpeed PHY (can be port specific), otherwise FullSpeed
-#ifndef BOARD_HOST_RHPORT_SPEED
-  #if TU_CHECK_MCU(OPT_MCU_LPC18XX, OPT_MCU_LPC43XX, OPT_MCU_MIMXRT10XX, OPT_MCU_NUC505) ||\
-      TU_CHECK_MCU(OPT_MCU_CXD56, OPT_MCU_SAMX7X, OPT_MCU_BCM2711) ||\
-      TU_CHECK_MCU(OPT_MCU_FT90X, OPT_MCU_FT93X)
-    #define BOARD_HOST_RHPORT_SPEED   OPT_MODE_HIGH_SPEED
-  #else
-    #define BOARD_HOST_RHPORT_SPEED   OPT_MODE_FULL_SPEED
-  #endif
-#endif
-
-// Device mode with rhport and speed defined by board.mk
-#if   BOARD_DEVICE_RHPORT_NUM == 0
-  #define CFG_TUSB_RHPORT0_MODE     (OPT_MODE_DEVICE | BOARD_DEVICE_RHPORT_SPEED)
-#elif BOARD_DEVICE_RHPORT_NUM == 1
-  #define CFG_TUSB_RHPORT1_MODE     (OPT_MODE_DEVICE | BOARD_DEVICE_RHPORT_SPEED)
-#else
-  #error "Incorrect RHPort configuration"
-#endif
-
-// Device mode with rhport and speed defined by board.mk
-#if   BOARD_HOST_RHPORT_NUM == 0
-  #define CFG_TUSB_RHPORT0_MODE     (OPT_MODE_HOST | BOARD_HOST_RHPORT_SPEED)
-#elif BOARD_HOST_RHPORT_NUM == 1
-  #define CFG_TUSB_RHPORT1_MODE     (OPT_MODE_HOST | BOARD_HOST_RHPORT_SPEED)
-#else
-  #error "Incorrect RHPort configuration"
-#endif
-
-// This example doesn't use an RTOS
-#ifndef CFG_TUSB_OS
-#define CFG_TUSB_OS               OPT_OS_NONE
-#endif
-
-// CFG_TUSB_DEBUG is defined by compiler in DEBUG build
-// #define CFG_TUSB_DEBUG           0
-
-/* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
- * Tinyusb use follows macros to declare transferring memory so that they can be put
- * into those specific section.
- * e.g
- * - CFG_TUSB_MEM SECTION : __attribute__ (( section(".usb_ram") ))
- * - CFG_TUSB_MEM_ALIGN   : __attribute__ ((aligned(4)))
- */
-#ifndef CFG_TUSB_MEM_SECTION
-#define CFG_TUSB_MEM_SECTION
-#endif
-
-#ifndef CFG_TUSB_MEM_ALIGN
-#define CFG_TUSB_MEM_ALIGN          __attribute__ ((aligned(4)))
-#endif
-
-//--------------------------------------------------------------------
-// DEVICE CONFIGURATION
-//--------------------------------------------------------------------
-
-#ifndef CFG_TUD_ENDPOINT0_SIZE
-#define CFG_TUD_ENDPOINT0_SIZE    64
-#endif
-
-//------------- CLASS -------------//
-#define CFG_TUD_CDC              1
-#define CFG_TUD_MSC              0
-#define CFG_TUD_HID              0
-#define CFG_TUD_MIDI             0
-#define CFG_TUD_VENDOR           0
-
-// CDC FIFO size of TX and RX
-#define CFG_TUD_CDC_RX_BUFSIZE   (TUD_OPT_HIGH_SPEED ? 512 : 64)
-#define CFG_TUD_CDC_TX_BUFSIZE   (TUD_OPT_HIGH_SPEED ? 512 : 64)
-
-// CDC Endpoint transfer buffer size, more is faster
-#define CFG_TUD_CDC_EP_BUFSIZE   (TUD_OPT_HIGH_SPEED ? 512 : 64)
-
-//--------------------------------------------------------------------
-// HOST CONFIGURATION
-//--------------------------------------------------------------------
-
-// Size of buffer to hold descriptors and other data used for enumeration
-#define CFG_TUH_ENUMERATION_BUFSIZE 256
-
-#define CFG_TUH_HUB                 1
-#define CFG_TUH_CDC                 0
-#define CFG_TUH_MSC                 0
-#define CFG_TUH_VENDOR              0
-
-// max device support (excluding hub device)
-#define CFG_TUH_DEVICE_MAX          (CFG_TUH_HUB ? 4 : 1) // hub typically has 4 ports
-
-//------------- HID -------------//
-#define CFG_TUH_HID                  4
-#define CFG_TUH_HID_EPIN_BUFSIZE    64
-#define CFG_TUH_HID_EPOUT_BUFSIZE   64
-
-#ifdef __cplusplus
- }
-#endif
-
-#endif /* _TUSB_CONFIG_H_ */
diff --git a/examples/host/hid_to_cdc/src/usb_descriptors.c b/examples/host/hid_to_cdc/src/usb_descriptors.c
deleted file mode 100644
index 7dd73937c..000000000
--- a/examples/host/hid_to_cdc/src/usb_descriptors.c
+++ /dev/null
@@ -1,266 +0,0 @@
-/* 
- * The MIT License (MIT)
- *
- * Copyright (c) 2019 Ha Thach (tinyusb.org)
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- */
-
-#include "tusb.h"
-
-/* A combination of interfaces must have a unique product id, since PC will save device driver after the first plug.
- * Same VID/PID with different interface e.g MSC (first), then CDC (later) will possibly cause system error on PC.
- *
- * Auto ProductID layout's Bitmap:
- *   [MSB]         HID | MSC | CDC          [LSB]
- */
-#define _PID_MAP(itf, n)  ( (CFG_TUD_##itf) << (n) )
-#define USB_PID           (0x4000 | _PID_MAP(CDC, 0) | _PID_MAP(MSC, 1) | _PID_MAP(HID, 2) | \
-                           _PID_MAP(MIDI, 3) | _PID_MAP(VENDOR, 4) )
-
-#define USB_VID   0xCafe
-#define USB_BCD   0x0200
-
-//--------------------------------------------------------------------+
-// Device Descriptors
-//--------------------------------------------------------------------+
-tusb_desc_device_t const desc_device =
-{
-  .bLength            = sizeof(tusb_desc_device_t),
-  .bDescriptorType    = TUSB_DESC_DEVICE,
-  .bcdUSB             = USB_BCD,
-
-  // Use Interface Association Descriptor (IAD) for CDC
-  // As required by USB Specs IAD's subclass must be common class (2) and protocol must be IAD (1)
-  .bDeviceClass       = TUSB_CLASS_MISC,
-  .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
-  .bDeviceProtocol    = MISC_PROTOCOL_IAD,
-
-  .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
-
-  .idVendor           = USB_VID,
-  .idProduct          = USB_PID,
-  .bcdDevice          = 0x0100,
-
-  .iManufacturer      = 0x01,
-  .iProduct           = 0x02,
-  .iSerialNumber      = 0x03,
-
-  .bNumConfigurations = 0x01
-};
-
-// Invoked when received GET DEVICE DESCRIPTOR
-// Application return pointer to descriptor
-uint8_t const * tud_descriptor_device_cb(void)
-{
-  return (uint8_t const *) &desc_device;
-}
-
-//--------------------------------------------------------------------+
-// Configuration Descriptor
-//--------------------------------------------------------------------+
-
-enum
-{
-  ITF_NUM_CDC = 0,
-  ITF_NUM_CDC_DATA,
-  ITF_NUM_MSC,
-  ITF_NUM_TOTAL
-};
-
-#if CFG_TUSB_MCU == OPT_MCU_LPC175X_6X || CFG_TUSB_MCU == OPT_MCU_LPC177X_8X || CFG_TUSB_MCU == OPT_MCU_LPC40XX
-  // LPC 17xx and 40xx endpoint type (bulk/interrupt/iso) are fixed by its number
-  // 0 control, 1 In, 2 Bulk, 3 Iso, 4 In, 5 Bulk etc ...
-  #define EPNUM_CDC_NOTIF   0x81
-  #define EPNUM_CDC_OUT     0x02
-  #define EPNUM_CDC_IN      0x82
-
-#elif CFG_TUSB_MCU == OPT_MCU_SAMG  || CFG_TUSB_MCU ==  OPT_MCU_SAMX7X
-  // SAMG & SAME70 don't support a same endpoint number with different direction IN and OUT
-  //    e.g EP1 OUT & EP1 IN cannot exist together
-  #define EPNUM_CDC_NOTIF   0x81
-  #define EPNUM_CDC_OUT     0x02
-  #define EPNUM_CDC_IN      0x83
-
-#elif CFG_TUSB_MCU == OPT_MCU_CXD56
-  // CXD56 doesn't support a same endpoint number with different direction IN and OUT
-  //    e.g EP1 OUT & EP1 IN cannot exist together
-  // CXD56 USB driver has fixed endpoint type (bulk/interrupt/iso) and direction (IN/OUT) by its number
-  // 0 control (IN/OUT), 1 Bulk (IN), 2 Bulk (OUT), 3 In (IN), 4 Bulk (IN), 5 Bulk (OUT), 6 In (IN)
-  #define EPNUM_CDC_NOTIF   0x83
-  #define EPNUM_CDC_OUT     0x02
-  #define EPNUM_CDC_IN      0x81
-
-#elif CFG_TUSB_MCU == OPT_MCU_FT90X || CFG_TUSB_MCU == OPT_MCU_FT93X
-  // FT9XX doesn't support a same endpoint number with different direction IN and OUT
-  //    e.g EP1 OUT & EP1 IN cannot exist together
-  #define EPNUM_CDC_NOTIF   0x81
-  #define EPNUM_CDC_OUT     0x02
-  #define EPNUM_CDC_IN      0x83
-
-#else
-  #define EPNUM_CDC_NOTIF   0x81
-  #define EPNUM_CDC_OUT     0x02
-  #define EPNUM_CDC_IN      0x82
-
-#endif
-
-#define CONFIG_TOTAL_LEN    (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN)
-
-// full speed configuration
-uint8_t const desc_fs_configuration[] =
-{
-  // Config number, interface count, string index, total length, attribute, power in mA
-  TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
-
-  // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
-  TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 64),
-};
-
-#if TUD_OPT_HIGH_SPEED
-// Per USB specs: high speed capable device must report device_qualifier and other_speed_configuration
-
-// high speed configuration
-uint8_t const desc_hs_configuration[] =
-{
-  // Config number, interface count, string index, total length, attribute, power in mA
-  TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
-
-  // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
-  TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 512),
-};
-
-// other speed configuration
-uint8_t desc_other_speed_config[CONFIG_TOTAL_LEN];
-
-// device qualifier is mostly similar to device descriptor since we don't change configuration based on speed
-tusb_desc_device_qualifier_t const desc_device_qualifier =
-{
-  .bLength            = sizeof(tusb_desc_device_qualifier_t),
-  .bDescriptorType    = TUSB_DESC_DEVICE_QUALIFIER,
-  .bcdUSB             = USB_BCD,
-
-  .bDeviceClass       = TUSB_CLASS_MISC,
-  .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
-  .bDeviceProtocol    = MISC_PROTOCOL_IAD,
-
-  .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
-  .bNumConfigurations = 0x01,
-  .bReserved          = 0x00
-};
-
-// Invoked when received GET DEVICE QUALIFIER DESCRIPTOR request
-// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete.
-// device_qualifier descriptor describes information about a high-speed capable device that would
-// change if the device were operating at the other speed. If not highspeed capable stall this request.
-uint8_t const* tud_descriptor_device_qualifier_cb(void)
-{
-  return (uint8_t const*) &desc_device_qualifier;
-}
-
-// Invoked when received GET OTHER SEED CONFIGURATION DESCRIPTOR request
-// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
-// Configuration descriptor in the other speed e.g if high speed then this is for full speed and vice versa
-uint8_t const* tud_descriptor_other_speed_configuration_cb(uint8_t index)
-{
-  (void) index; // for multiple configurations
-
-  // if link speed is high return fullspeed config, and vice versa
-  // Note: the descriptor type is OHER_SPEED_CONFIG instead of CONFIG
-  memcpy(desc_other_speed_config,
-         (tud_speed_get() == TUSB_SPEED_HIGH) ? desc_fs_configuration : desc_hs_configuration,
-         CONFIG_TOTAL_LEN);
-
-  desc_other_speed_config[1] = TUSB_DESC_OTHER_SPEED_CONFIG;
-
-  return desc_other_speed_config;
-}
-
-#endif // highspeed
-
-
-// Invoked when received GET CONFIGURATION DESCRIPTOR
-// Application return pointer to descriptor
-// Descriptor contents must exist long enough for transfer to complete
-uint8_t const * tud_descriptor_configuration_cb(uint8_t index)
-{
-  (void) index; // for multiple configurations
-
-#if TUD_OPT_HIGH_SPEED
-  // Although we are highspeed, host may be fullspeed.
-  return (tud_speed_get() == TUSB_SPEED_HIGH) ?  desc_hs_configuration : desc_fs_configuration;
-#else
-  return desc_fs_configuration;
-#endif
-}
-
-//--------------------------------------------------------------------+
-// String Descriptors
-//--------------------------------------------------------------------+
-
-// array of pointer to string descriptors
-char const* string_desc_arr [] =
-{
-  (const char[]) { 0x09, 0x04 }, // 0: is supported language is English (0x0409)
-  "TinyUSB",                     // 1: Manufacturer
-  "TinyUSB Device",              // 2: Product
-  "123456789012",                // 3: Serials, should use chip ID
-  "TinyUSB CDC",                 // 4: CDC Interface
-};
-
-static uint16_t _desc_str[32];
-
-// Invoked when received GET STRING DESCRIPTOR request
-// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
-uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
-{
-  (void) langid;
-
-  uint8_t chr_count;
-
-  if ( index == 0)
-  {
-    memcpy(&_desc_str[1], string_desc_arr[0], 2);
-    chr_count = 1;
-  }else
-  {
-    // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
-    // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
-
-    if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL;
-
-    const char* str = string_desc_arr[index];
-
-    // Cap at max char
-    chr_count = (uint8_t) strlen(str);
-    if ( chr_count > 31 ) chr_count = 31;
-
-    // Convert ASCII string into UTF-16
-    for(uint8_t i=0; i<chr_count; i++)
-    {
-      _desc_str[1+i] = str[i];
-    }
-  }
-
-  // first byte is length (including header), second byte is string type
-  _desc_str[0] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
-
-  return _desc_str;
-}