add dual/host_info_to_device_cdc example

8 files changed, 761 insertions, 2 deletions

diff --git a/examples/dual/CMakeLists.txt b/examples/dual/CMakeLists.txt
index 15081cf26..f11074e93 100644
--- a/examples/dual/CMakeLists.txt
+++ b/examples/dual/CMakeLists.txt
@@ -10,4 +10,5 @@ if (FAMILY STREQUAL "rp2040" AND NOT TARGET tinyusb_pico_pio_usb)
 else ()
   # family_add_subdirectory will filter what to actually add based on selected FAMILY
   family_add_subdirectory(host_hid_to_device_cdc)
+  family_add_subdirectory(host_info_to_device_cdc)
 endif ()
diff --git a/examples/dual/host_info_to_device_cdc/CMakeLists.txt b/examples/dual/host_info_to_device_cdc/CMakeLists.txt
new file mode 100644
index 000000000..a6557c2d0
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/CMakeLists.txt
@@ -0,0 +1,40 @@
+cmake_minimum_required(VERSION 3.17)
+
+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} C CXX ASM)
+
+# 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
+  ${CMAKE_CURRENT_SOURCE_DIR}/src
+  )
+
+# Configure compilation flags and libraries for the example without RTOS.
+# See the corresponding function in hw/bsp/FAMILY/family.cmake for details.
+family_configure_dual_usb_example(${PROJECT} noos)
+
+# due to warnings from Pico-PIO-USB
+target_compile_options(${PROJECT} PUBLIC
+  -Wno-error=shadow
+  -Wno-error=cast-align
+  -Wno-error=cast-qual
+  -Wno-error=redundant-decls
+  -Wno-error=sign-conversion
+  -Wno-error=conversion
+  -Wno-error=sign-compare
+  -Wno-error=unused-function
+  )
diff --git a/examples/dual/host_info_to_device_cdc/Makefile b/examples/dual/host_info_to_device_cdc/Makefile
new file mode 100644
index 000000000..0ede79c17
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/Makefile
@@ -0,0 +1,17 @@
+include ../../build_system/make/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/host/hub.c \
+	src/host/usbh.c
+
+include ../../build_system/make/rules.mk
diff --git a/examples/dual/host_info_to_device_cdc/only.txt b/examples/dual/host_info_to_device_cdc/only.txt
new file mode 100644
index 000000000..cfc87eb4e
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/only.txt
@@ -0,0 +1,6 @@
+board:mimxrt1060_evk
+board:mimxrt1064_evk
+board:mcb1800
+mcu:RP2040
+mcu:ra6m5
+mcu:MAX3421
diff --git a/examples/dual/host_info_to_device_cdc/src/main.c b/examples/dual/host_info_to_device_cdc/src/main.c
new file mode 100644
index 000000000..5be531098
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/src/main.c
@@ -0,0 +1,285 @@
+/*
+ * 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.
+ *
+ */
+
+/* Host example will get device descriptors of attached devices and print it out via device cdc as follows:
+ *    Device 1: ID 046d:c52f
+      Device Descriptor:
+        bLength             18
+        bDescriptorType     1
+        bcdUSB              0200
+        bDeviceClass        0
+        bDeviceSubClass     0
+        bDeviceProtocol     0
+        bMaxPacketSize0     8
+        idVendor            0x046d
+        idProduct           0xc52f
+        bcdDevice           2200
+        iManufacturer       1     Logitech
+        iProduct            2     USB Receiver
+        iSerialNumber       0
+        bNumConfigurations  1
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "bsp/board_api.h"
+#include "tusb.h"
+
+//--------------------------------------------------------------------+
+// MACRO CONSTANT TYPEDEF PROTYPES
+//--------------------------------------------------------------------+
+// Language ID: English
+#define LANGUAGE_ID 0x0409
+
+/* 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;
+
+static bool is_print[CFG_TUH_DEVICE_MAX+1] = { 0 };
+
+static void print_utf16(uint16_t *temp_buf, size_t buf_len);
+void led_blinking_task(void);
+void cdc_task(void);
+
+/*------------- MAIN -------------*/
+int main(void) {
+  board_init();
+
+  printf("TinyUSB Host Information -> Device CDC Example\r\n");
+
+  // init device and host stack on configured roothub port
+  tud_init(BOARD_TUD_RHPORT);
+  tuh_init(BOARD_TUH_RHPORT);
+
+  if (board_init_after_tusb) {
+    board_init_after_tusb();
+  }
+
+  while (1) {
+    tud_task(); // tinyusb device task
+    tuh_task(); // tinyusb host task
+    cdc_task();
+    led_blinking_task();
+  }
+
+  return 0;
+}
+
+//--------------------------------------------------------------------+
+// Device CDC
+//--------------------------------------------------------------------+
+
+// 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 = tud_mounted() ? BLINK_MOUNTED : BLINK_NOT_MOUNTED;
+}
+
+#if 1
+#define cdc_printf(...)                          \
+  do {                                           \
+    char _tempbuf[256];                          \
+    int count = sprintf(_tempbuf, __VA_ARGS__);  \
+    tud_cdc_write(_tempbuf, (uint32_t) count);   \
+    tud_cdc_write_flush();                       \
+    tud_task();                                  \
+  } while(0)
+#endif
+
+//#define cdc_printf printf
+
+void print_device_info(uint8_t daddr) {
+  tusb_desc_device_t desc_device;
+  uint8_t xfer_result = tuh_descriptor_get_device_sync(daddr, &desc_device, 18);
+  if (XFER_RESULT_SUCCESS != xfer_result) {
+    tud_cdc_write_str("Failed to get device descriptor\r\n");
+    return;
+  }
+
+  cdc_printf("Device %u: ID %04x:%04x\r\n", daddr, desc_device.idVendor, desc_device.idProduct);
+  cdc_printf("Device Descriptor:\r\n");
+  cdc_printf("  bLength             %u\r\n"     , desc_device.bLength);
+  cdc_printf("  bDescriptorType     %u\r\n"     , desc_device.bDescriptorType);
+  cdc_printf("  bcdUSB              %04x\r\n"   , desc_device.bcdUSB);
+  cdc_printf("  bDeviceClass        %u\r\n"     , desc_device.bDeviceClass);
+  cdc_printf("  bDeviceSubClass     %u\r\n"     , desc_device.bDeviceSubClass);
+  cdc_printf("  bDeviceProtocol     %u\r\n"     , desc_device.bDeviceProtocol);
+  cdc_printf("  bMaxPacketSize0     %u\r\n"     , desc_device.bMaxPacketSize0);
+  cdc_printf("  idVendor            0x%04x\r\n" , desc_device.idVendor);
+  cdc_printf("  idProduct           0x%04x\r\n" , desc_device.idProduct);
+  cdc_printf("  bcdDevice           %04x\r\n"   , desc_device.bcdDevice);
+
+  // Get String descriptor using Sync API
+  uint16_t buf[128];
+
+  cdc_printf("  iManufacturer       %u     "     , desc_device.iManufacturer);
+  xfer_result = tuh_descriptor_get_manufacturer_string_sync(daddr, LANGUAGE_ID, buf, sizeof(buf));
+  if (XFER_RESULT_SUCCESS == xfer_result ) {
+    print_utf16(buf, TU_ARRAY_SIZE(buf));
+  }
+  tud_cdc_write_str("\r\n");
+
+  cdc_printf("  iProduct            %u     "     , desc_device.iProduct);
+  xfer_result = tuh_descriptor_get_product_string_sync(daddr, LANGUAGE_ID, buf, sizeof(buf));
+  if (XFER_RESULT_SUCCESS == xfer_result) {
+    print_utf16(buf, TU_ARRAY_SIZE(buf));
+  }
+  tud_cdc_write_str("\r\n");
+
+  cdc_printf("  iSerialNumber       %u     "     , desc_device.iSerialNumber);
+  xfer_result = tuh_descriptor_get_serial_string_sync(daddr, LANGUAGE_ID, buf, sizeof(buf));
+  if (XFER_RESULT_SUCCESS == xfer_result) {
+    print_utf16(buf, TU_ARRAY_SIZE(buf));
+  }
+  tud_cdc_write_str("\r\n");
+
+  cdc_printf("  bNumConfigurations  %u\r\n"     , desc_device.bNumConfigurations);
+}
+
+void cdc_task(void) {
+  if (tud_cdc_connected()) {
+    for (uint8_t daddr = 1; daddr <= CFG_TUH_DEVICE_MAX; daddr++) {
+      if (tuh_mounted(daddr)) {
+        if (is_print[daddr]) {
+          is_print[daddr] = false;
+          print_device_info(daddr);
+          tud_cdc_write_flush();
+        }
+      }
+    }
+  }
+}
+
+//--------------------------------------------------------------------+
+// Host Get device information
+//--------------------------------------------------------------------+
+void tuh_mount_cb(uint8_t daddr) {
+  printf("mounted device %u\r\n", daddr);
+  is_print[daddr] = true;
+}
+
+void tuh_umount_cb(uint8_t daddr) {
+  printf("unmounted device %u\r\n", daddr);
+  is_print[daddr] = false;
+}
+
+//--------------------------------------------------------------------+
+// 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
+}
+
+//--------------------------------------------------------------------+
+// String Descriptor Helper
+//--------------------------------------------------------------------+
+
+static void _convert_utf16le_to_utf8(const uint16_t *utf16, size_t utf16_len, uint8_t *utf8, size_t utf8_len) {
+  // TODO: Check for runover.
+  (void)utf8_len;
+  // Get the UTF-16 length out of the data itself.
+
+  for (size_t i = 0; i < utf16_len; i++) {
+    uint16_t chr = utf16[i];
+    if (chr < 0x80) {
+      *utf8++ = chr & 0xffu;
+    } else if (chr < 0x800) {
+      *utf8++ = (uint8_t)(0xC0 | (chr >> 6 & 0x1F));
+      *utf8++ = (uint8_t)(0x80 | (chr >> 0 & 0x3F));
+    } else {
+      // TODO: Verify surrogate.
+      *utf8++ = (uint8_t)(0xE0 | (chr >> 12 & 0x0F));
+      *utf8++ = (uint8_t)(0x80 | (chr >> 6 & 0x3F));
+      *utf8++ = (uint8_t)(0x80 | (chr >> 0 & 0x3F));
+    }
+    // TODO: Handle UTF-16 code points that take two entries.
+  }
+}
+
+// Count how many bytes a utf-16-le encoded string will take in utf-8.
+static int _count_utf8_bytes(const uint16_t *buf, size_t len) {
+  size_t total_bytes = 0;
+  for (size_t i = 0; i < len; i++) {
+    uint16_t chr = buf[i];
+    if (chr < 0x80) {
+      total_bytes += 1;
+    } else if (chr < 0x800) {
+      total_bytes += 2;
+    } else {
+      total_bytes += 3;
+    }
+    // TODO: Handle UTF-16 code points that take two entries.
+  }
+  return (int) total_bytes;
+}
+
+static void print_utf16(uint16_t *temp_buf, size_t buf_len) {
+  if ((temp_buf[0] & 0xff) == 0) return;  // empty
+  size_t utf16_len = ((temp_buf[0] & 0xff) - 2) / sizeof(uint16_t);
+  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';
+
+  tud_cdc_write(temp_buf, utf8_len);
+  tud_cdc_write_flush();
+  tud_task();
+}
diff --git a/examples/dual/host_info_to_device_cdc/src/tusb_config.h b/examples/dual/host_info_to_device_cdc/src/tusb_config.h
new file mode 100644
index 000000000..bb47fbf4a
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/src/tusb_config.h
@@ -0,0 +1,143 @@
+/*
+ * 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
+
+//--------------------------------------------------------------------+
+// Board Specific Configuration
+//--------------------------------------------------------------------+
+
+// RHPort number used for device can be defined by board.mk, default to port 0
+#ifndef BOARD_TUD_RHPORT
+#define BOARD_TUD_RHPORT      0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUD_MAX_SPEED
+#define BOARD_TUD_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+#endif
+
+// RHPort number used for host can be defined by board.mk, default to port 1
+#ifndef BOARD_TUH_RHPORT
+#define BOARD_TUH_RHPORT      1
+#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
+#endif
+
+#ifndef CFG_TUSB_OS
+#define CFG_TUSB_OS           OPT_OS_NONE
+#endif
+
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG        0
+#endif
+
+// Enable Device stack, Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUD_ENABLED       1
+#define CFG_TUD_MAX_SPEED     BOARD_TUD_MAX_SPEED
+
+// Enable Host stack, Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUH_ENABLED       1
+#define CFG_TUH_MAX_SPEED     BOARD_TUH_MAX_SPEED
+
+#if CFG_TUSB_MCU == OPT_MCU_RP2040
+// Use pico-pio-usb as host controller for raspberry rp2040
+#define CFG_TUH_RPI_PIO_USB   1
+#endif
+
+/* 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_TUD_MEM_SECTION
+#define CFG_TUD_MEM_SECTION
+#endif
+
+#ifndef CFG_TUD_MEM_ALIGN
+#define CFG_TUD_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
+
+// 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
+
+#ifndef CFG_TUH_MEM_SECTION
+#define CFG_TUH_MEM_SECTION
+#endif
+
+#ifndef CFG_TUH_MEM_ALIGN
+#define CFG_TUH_MEM_ALIGN           __attribute__ ((aligned(4)))
+#endif
+
+#define CFG_TUH_HUB                 1
+// max device support (excluding hub device)
+#define CFG_TUH_DEVICE_MAX          (CFG_TUH_HUB ? 4 : 1) // hub typically has 4 ports
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif
diff --git a/examples/dual/host_info_to_device_cdc/src/usb_descriptors.c b/examples/dual/host_info_to_device_cdc/src/usb_descriptors.c
new file mode 100644
index 000000000..9d57737fb
--- /dev/null
+++ b/examples/dual/host_info_to_device_cdc/src/usb_descriptors.c
@@ -0,0 +1,268 @@
+/*
+ * 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 "bsp/board_api.h"
+#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_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
+//--------------------------------------------------------------------+
+
+// String Descriptor Index
+enum {
+  STRID_LANGID = 0,
+  STRID_MANUFACTURER,
+  STRID_PRODUCT,
+  STRID_SERIAL,
+};
+
+// 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
+    NULL,                          // 3: Serials will use unique ID if possible
+    "TinyUSB CDC",                 // 4: CDC Interface
+};
+
+static uint16_t _desc_str[32 + 1];
+
+// 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;
+  size_t chr_count;
+
+  switch (index) {
+    case STRID_LANGID:
+      memcpy(&_desc_str[1], string_desc_arr[0], 2);
+      chr_count = 1;
+      break;
+
+    case STRID_SERIAL:
+      chr_count = board_usb_get_serial(_desc_str + 1, 32);
+      break;
+
+    default:
+      // 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 = strlen(str);
+      size_t const max_count = sizeof(_desc_str) / sizeof(_desc_str[0]) - 1; // -1 for string type
+      if (chr_count > max_count) chr_count = max_count;
+
+      // Convert ASCII string into UTF-16
+      for (size_t i = 0; i < chr_count; i++) {
+        _desc_str[1 + i] = str[i];
+      }
+      break;
+  }
+
+  // first byte is length (including header), second byte is string type
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8) | (2 * chr_count + 2));
+
+  return _desc_str;
+}
diff --git a/examples/host/device_info/src/main.c b/examples/host/device_info/src/main.c
index 60d7e9c80..18beea663 100644
--- a/examples/host/device_info/src/main.c
+++ b/examples/host/device_info/src/main.c
@@ -23,8 +23,7 @@
  *
  */
 
-/* Host example will get device descriptors of attached devices and print it out via
- * device cdc (Serial) as follows:
+/* Host example will get device descriptors of attached devices and print it out via uart/rtt (logger) as follows:
  *    Device 1: ID 046d:c52f
       Device Descriptor:
         bLength             18