3 files changed, 28 insertions, 26 deletions

diff --git a/examples/device/dfu_runtime/src/main.c b/examples/device/dfu_runtime/src/main.c
index 823c71ae5..55b380353 100644
--- a/examples/device/dfu_runtime/src/main.c
+++ b/examples/device/dfu_runtime/src/main.c
@@ -69,7 +69,8 @@ int main(void)
 {
   board_init();
 
-  tusb_init();
+  // init device stack on configured roothub port
+  tud_init(BOARD_TUD_RHPORT);
 
   while (1)
   {
diff --git a/examples/device/dfu_runtime/src/tusb_config.h b/examples/device/dfu_runtime/src/tusb_config.h
index e15ae7997..fa1ae6ed3 100644
--- a/examples/device/dfu_runtime/src/tusb_config.h
+++ b/examples/device/dfu_runtime/src/tusb_config.h
@@ -12,41 +12,42 @@
  extern "C" {
 #endif
 
-//--------------------------------------------------------------------
-// COMMON CONFIGURATION
-//--------------------------------------------------------------------
-
-// defined by board.mk
-#ifndef CFG_TUSB_MCU
-  #error CFG_TUSB_MCU must be defined
-#endif
+//--------------------------------------------------------------------+
+// Board Specific Configuration
+//--------------------------------------------------------------------+
 
 // 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
+#ifndef BOARD_TUD_RHPORT
+#define BOARD_TUD_RHPORT      0
 #endif
 
 // RHPort max operational speed can defined by board.mk
-// Default to max (auto) speed for MCU with internal HighSpeed PHY
-#ifndef BOARD_DEVICE_RHPORT_SPEED
-  #define BOARD_DEVICE_RHPORT_SPEED   OPT_MODE_DEFAULT_SPEED
+#ifndef BOARD_TUD_MAX_SPEED
+#define BOARD_TUD_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
 #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"
+//--------------------------------------------------------------------
+// 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
+#define CFG_TUSB_OS           OPT_OS_NONE
 #endif
 
-// CFG_TUSB_DEBUG is defined by compiler in DEBUG build
-// #define CFG_TUSB_DEBUG           0
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG        0
+#endif
+
+// Enable Device stack
+#define CFG_TUD_ENABLED       1
+
+// Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUD_MAX_SPEED     BOARD_TUD_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/device/dfu_runtime/src/usb_descriptors.c b/examples/device/dfu_runtime/src/usb_descriptors.c
index 060943289..1b0a60551 100644
--- a/examples/device/dfu_runtime/src/usb_descriptors.c
+++ b/examples/device/dfu_runtime/src/usb_descriptors.c
@@ -147,7 +147,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
     const char* str = string_desc_arr[index];
 
     // Cap at max char
-    chr_count = strlen(str);
+    chr_count = (uint8_t) strlen(str);
     if ( chr_count > 31 ) {
       chr_count = 31;
     }
@@ -160,7 +160,7 @@ uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid)
   }
 
   // first byte is length (including header), second byte is string type
-  _desc_str[0] = (uint16_t)((((uint16_t)TUSB_DESC_STRING) << 8 ) | (2u*chr_count + 2u));
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }