diff --git a/lib/tinyusb b/lib/tinyusb
index 142300c..ec3227b 160000
--- a/lib/tinyusb
+++ b/lib/tinyusb
@@ -1 +1 @@
-Subproject commit 142300ca60d4c08d3d05df77c943e76b4336b21f
+Subproject commit ec3227b2202b007da1b76c20394b6f4d774f68b6
diff --git a/src/Makefile b/src/Makefile
index c4fcaf4..80232be 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -118,6 +118,7 @@ C_SOURCE_FILES += $(TUSB_PATH)/portable/nordic/nrf5x/dcd_nrf5x.c
 C_SOURCE_FILES += $(TUSB_PATH)/portable/nordic/nrf5x/hal_nrf5x.c
 C_SOURCE_FILES += $(TUSB_PATH)/common/tusb_fifo.c
 C_SOURCE_FILES += $(TUSB_PATH)/device/usbd.c
+C_SOURCE_FILES += $(TUSB_PATH)/device/usbd_desc.c
 C_SOURCE_FILES += $(TUSB_PATH)/class/cdc/cdc_device.c
 C_SOURCE_FILES += $(TUSB_PATH)/class/msc/msc_device.c
 C_SOURCE_FILES += $(TUSB_PATH)/class/custom/custom_device.c
diff --git a/src/segger/nrf52840_bootloader.emProject b/src/segger/nrf52840_bootloader.emProject
index ad4a1f3..292b838 100644
--- a/src/segger/nrf52840_bootloader.emProject
+++ b/src/segger/nrf52840_bootloader.emProject
@@ -18,7 +18,7 @@
       arm_target_debug_interface_type="ADIv5"
       arm_target_device_name="nRF52840_xxAA"
       arm_target_interface_type="SWD"
-      c_preprocessor_definitions="NRF52840_XXAA;__nRF_FAMILY;ARM_MATH_CM4;FLASH_PLACEMENT=1;NO_VTOR_CONFIG;BOARD_FEATHER52840;BOOTLOADER_VERSION=0x06000001;MK_DIS_FIRMWARE="S140 6.0.0, 6.0.0";S140;CONFIG_GPIO_AS_PINRESET;BLE_STACK_SUPPORT_REQD;SWI_DISABLE0;SOFTDEVICE_PRESENT;FLOAT_ABI_HARD"
+      c_preprocessor_definitions="NRF52840_XXAA;__nRF_FAMILY;ARM_MATH_CM4;FLASH_PLACEMENT=1;NO_VTOR_CONFIG;BOARD_PCA10056;BOOTLOADER_VERSION=0x06000001;MK_DIS_FIRMWARE="S140 6.0.0, 6.0.0";S140;CONFIG_GPIO_AS_PINRESET;BLE_STACK_SUPPORT_REQD;SWI_DISABLE0;SOFTDEVICE_PRESENT;FLOAT_ABI_HARD"
       c_user_include_directories="../;../usb;$(TusbDir);$(SdDir)/s140/headers;$(SdDir)/s140/headers/nrf52;$(Sdk11Dir)/drivers_nrf/pstorage;$(Sdk11Dir)/ble/common/;$(Sdk11Dir)/ble/ble_services/ble_dfu;$(Sdk11Dir)/ble/ble_services/ble_dis;$(Sdk11Dir)/libraries/bootloader_dfu;$(Sdk11Dir)/libraries/bootloader_dfu/hci_transport;$(Sdk11Dir)/libraries/util;$(SdkDir)/toolchain/cmsis/include;$(SdkDir)/device;$(SdkDir)/toolchain;$(SdkDir)/drivers_nrf/hal;$(SdkDir)/drivers_nrf/systick;$(SdkDir)/drivers_nrf/uart;$(SdkDir)/drivers_nrf/usbd;$(SdkDir)/drivers_nrf/common;$(SdkDir)/drivers_nrf/delay;$(SdkDir)/drivers_nrf/power;$(SdkDir)/drivers_nrf/clock;$(SdkDir)/libraries/util;$(SdkDir)/libraries/timer;$(SdkDir)/libraries/scheduler;$(SdkDir)/libraries/crc16;$(SdkDir)/libraries/util;$(SdkDir)/libraries/hci/config;$(SdkDir)/libraries/uart;$(SdkDir)/libraries/hci;$(SdkDir)/external/fprintf;$(SdkDir)/libraries/strerror;$(SdkDir)/libraries/atomic;$(SdkDir)/libraries/balloc;$(SdkDir)/libraries/experimental_log/src;$(SdkDir)/libraries/experimental_log;$(SdkDir)/libraries/experimental_section_vars;$(SdkDir)/libraries/experimental_memobj"
       debug_register_definition_file="$(ProjectDir)/nrf52840_Registers.xml"
       debug_target_connection="J-Link"
@@ -244,12 +244,12 @@
       c_preprocessor_definitions="DEBUG_SIZE_EXPAND" />
   </project>
   <configuration
-    Name="Debug Single"
+    Name="Debug"
     c_preprocessor_definitions="DEBUG"
     gcc_debugging_level="Level 3"
     gcc_optimization_level="None" />
   <configuration
-    Name="Release Single"
+    Name="Release"
     c_preprocessor_definitions="NDEBUG"
     gcc_debugging_level="None"
     gcc_omit_frame_pointer="Yes"
diff --git a/src/usb/tusb_descriptors.c b/src/usb/tusb_descriptors.c
index 2e148f7..d1b3e18 100644
--- a/src/usb/tusb_descriptors.c
+++ b/src/usb/tusb_descriptors.c
@@ -279,46 +279,30 @@ app_descriptor_configuration_t const desc_configuration =
 //--------------------------------------------------------------------+
 // STRING DESCRIPTORS
 //--------------------------------------------------------------------+
-#define STRING_LEN_UNICODE(n) (2 + (2*(n))) // also includes 2 byte header
-#define ENDIAN_BE16_FROM( high, low) ENDIAN_BE16(high << 8 | low)
 
 // array of pointer to string descriptors
 uint16_t const * const string_desc_arr [] =
 {
-    [0] = (uint16_t []) { // supported language
-        ENDIAN_BE16_FROM( STRING_LEN_UNICODE(1), TUSB_DESC_STRING ),
-        0x0409 // English
-    },
+    // 0 index is supported language = English
+    TUD_DESC_STRCONV(0x0409),
 
-    [1] = (uint16_t []) { // manufacturer
-        ENDIAN_BE16_FROM( STRING_LEN_UNICODE(19), TUSB_DESC_STRING),
-        'A','d','a','f','r','u','i','t',' ','I','n','d','u','s','t','r','i','e','s'
-    },
+    // Manufacturer
+    TUD_DESC_STRCONV('A','d','a','f','r','u','i','t',' ','I','n','d','u','s','t','r','i','e','s'),
 
-    [2] = (uint16_t []) { // product
-        ENDIAN_BE16_FROM( STRING_LEN_UNICODE(18), TUSB_DESC_STRING),
-        'B','l','u','e','f','r','u','i','t',' ','n','R','F','5','2','8','4','0'
-    },
+    // Product
+    TUD_DESC_STRCONV('B','l','u','e','f','r','u','i','t',' ','n','R','F','5','2','8','4','0'),
 
-    [3] = (uint16_t []) { // serials TODO use chip ID
-        ENDIAN_BE16_FROM( STRING_LEN_UNICODE(4), TUSB_DESC_STRING),
-        '1', '2', '3', '4' // len = 4
-    },
+    // Serials TODO use chip ID
+    TUD_DESC_STRCONV('1', '2', '3', '4'),
 
-    [4] = (uint16_t []) { // CDC Interface
-        ENDIAN_BE16_FROM( STRING_LEN_UNICODE(16), TUSB_DESC_STRING),
-        'B','l','u','e','f','r','u','i','t',' ','S','e','r','i','a','l'
-    },
+    // CDC Interface
+    TUD_DESC_STRCONV('B','l','u','e','f','r','u','i','t',' ','S','e','r','i','a','l'),
 
-    [5] = (uint16_t []) { // MSC Interface
-        ENDIAN_BE16_FROM( STRING_LEN_UNICODE(17), TUSB_DESC_STRING),
-        'B','l','u','e','f','r','u','i','t',' ','S','t','o','r','a','g','e'
-    },
+    // MSC Interface
+    TUD_DESC_STRCONV('B','l','u','e','f','r','u','i','t',' ','S','t','o','r','a','g','e'),
 
-    [6] = (uint16_t []) { // Custom Interface
-        ENDIAN_BE16_FROM( STRING_LEN_UNICODE(16), TUSB_DESC_STRING),
-        'B','l','u','e','f','r','u','i','t',' ','C','u','s','t','o','m'
-    }
+    // Custom Interface
+    TUD_DESC_STRCONV('B','l','u','e','f','r','u','i','t',' ','C','u','s','t','o','m')
 };