fix -Wcast-qual

hw/bsp/nrf/family.mk

@@ -14,19 +14,7 @@ CFLAGS += \
   -DCONFIG_GPIO_AS_PINRESET
 
 # suppress warning caused by vendor mcu driver
-CFLAGS += -Wno-error=undef -Wno-error=unused-parameter -Wno-error=cast-align
-
-# due to tusb_hal_nrf_power_event
-GCCVERSION = $(firstword $(subst ., ,$(shell arm-none-eabi-gcc -dumpversion)))
-ifeq ($(CMDEXE),1)
-  ifeq ($(shell if $(GCCVERSION) geq 8 echo 1), 1)
-  CFLAGS += -Wno-error=cast-function-type
-  endif
-else
-  ifeq ($(shell expr $(GCCVERSION) \>= 8), 1)
-  CFLAGS += -Wno-error=cast-function-type
-  endif
-endif
+CFLAGS += -Wno-error=undef -Wno-error=unused-parameter -Wno-error=cast-align -Wno-error=cast-qual
 
 # All source paths should be relative to the top level.
 LD_FILE ?= hw/bsp/nrf/boards/$(BOARD)/nrf52840_s140_v6.ld

src/class/dfu/dfu_device.c

@@ -190,7 +190,7 @@ uint16_t dfu_moded_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc,
   _dfu_ctx.attrs = func_desc->bAttributes;
 
   // CFG_TUD_DFU_XFER_BUFSIZE has to be set to the buffer size used in TUD_DFU_DESCRIPTOR
-  uint16_t const transfer_size = tu_le16toh( tu_unaligned_read16((uint8_t*) func_desc + offsetof(tusb_desc_dfu_functional_t, wTransferSize)) );
+  uint16_t const transfer_size = tu_le16toh( tu_unaligned_read16((uint8_t const*) func_desc + offsetof(tusb_desc_dfu_functional_t, wTransferSize)) );
   TU_ASSERT(transfer_size <= CFG_TUD_DFU_XFER_BUFSIZE, drv_len);
 
   return drv_len;

src/class/hid/hid_device.c

@@ -206,8 +206,8 @@ uint16_t hidd_open(uint8_t rhport, tusb_desc_interface_t const * desc_itf, uint1
 
   //------------- HID descriptor -------------//
   p_desc = tu_desc_next(p_desc);
+  TU_ASSERT(HID_DESC_TYPE_HID == tu_desc_type(p_desc), 0);
   p_hid->hid_descriptor = (tusb_hid_descriptor_hid_t const *) p_desc;
-  TU_ASSERT(HID_DESC_TYPE_HID == p_hid->hid_descriptor->bDescriptorType, 0);
 
   //------------- Endpoint Descriptor -------------//
   p_desc = tu_desc_next(p_desc);
@@ -216,10 +216,10 @@ uint16_t hidd_open(uint8_t rhport, tusb_desc_interface_t const * desc_itf, uint1
   if ( desc_itf->bInterfaceSubClass == HID_SUBCLASS_BOOT ) p_hid->itf_protocol = desc_itf->bInterfaceProtocol;
 
   p_hid->protocol_mode = HID_PROTOCOL_REPORT; // Per Specs: default is report mode
-  p_hid->itf_num   = desc_itf->bInterfaceNumber;
+  p_hid->itf_num       = desc_itf->bInterfaceNumber;
 
   // Use offsetof to avoid pointer to the odd/misaligned address
-  memcpy(&p_hid->report_desc_len, (uint8_t*) p_hid->hid_descriptor + offsetof(tusb_hid_descriptor_hid_t, wReportLength), 2);
+  p_hid->report_desc_len = tu_unaligned_read16((uint8_t const*) p_hid->hid_descriptor + offsetof(tusb_hid_descriptor_hid_t, wReportLength));
 
   // Prepare for output endpoint
   if (p_hid->ep_out)
@@ -256,13 +256,13 @@ bool hidd_control_xfer_cb (uint8_t rhport, uint8_t stage, tusb_control_request_t
 
       if (request->bRequest == TUSB_REQ_GET_DESCRIPTOR && desc_type == HID_DESC_TYPE_HID)
       {
-        TU_VERIFY(p_hid->hid_descriptor != NULL);
-        TU_VERIFY(tud_control_xfer(rhport, request, (void*) p_hid->hid_descriptor, p_hid->hid_descriptor->bLength));
+        TU_VERIFY(p_hid->hid_descriptor);
+        TU_VERIFY(tud_control_xfer(rhport, request, (void*)(uintptr_t) p_hid->hid_descriptor, p_hid->hid_descriptor->bLength));
       }
       else if (request->bRequest == TUSB_REQ_GET_DESCRIPTOR && desc_type == HID_DESC_TYPE_REPORT)
       {
         uint8_t const * desc_report = tud_hid_descriptor_report_cb(hid_itf);
-        tud_control_xfer(rhport, request, (void*) desc_report, p_hid->report_desc_len);
+        tud_control_xfer(rhport, request, (void*)(uintptr_t) desc_report, p_hid->report_desc_len);
       }
       else
       {

src/class/usbtmc/usbtmc_device.c

@@ -1,10 +1,3 @@
-/*
- * usbtmc.c
- *
- *  Created on: Sep 9, 2019
- *      Author: nconrad
- */
-
 /*
  * The MIT License (MIT)
  *
@@ -205,7 +198,7 @@ bool tud_usbtmc_transmit_dev_msg_data(
   {
     TU_ASSERT(usbtmc_state.capabilities->bmDevCapabilities.canEndBulkInOnTermChar);
     TU_ASSERT(termCharRequested);
-    TU_ASSERT(((uint8_t*)data)[len-1u] == termChar);
+    TU_ASSERT(((uint8_t const*)data)[len-1u] == termChar);
   }
 #endif
 
@@ -228,7 +221,7 @@ bool tud_usbtmc_transmit_dev_msg_data(
   memcpy((uint8_t*)(usbtmc_state.ep_bulk_in_buf) + headerLen, data, dataLen);
   usbtmc_state.transfer_size_remaining = len - dataLen;
   usbtmc_state.transfer_size_sent = dataLen;
-  usbtmc_state.devInBuffer = (uint8_t*)data + (dataLen);
+  usbtmc_state.devInBuffer = (uint8_t const*) data + (dataLen);
 
   bool stateChanged =
       atomicChangeState(STATE_TX_REQUESTED, (packetLen >= txBufLen) ? STATE_TX_INITIATED : STATE_TX_SHORTED);
@@ -508,13 +501,13 @@ bool usbtmcd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint
     case STATE_ABORTING_BULK_OUT:
       TU_VERIFY(false);
       return false; // Should be stalled by now, shouldn't have received a packet.
+
     case STATE_TX_REQUESTED:
     case STATE_TX_INITIATED:
     case STATE_ABORTING_BULK_IN:
     case STATE_ABORTING_BULK_IN_SHORTED:
     case STATE_ABORTING_BULK_IN_ABORTED:
     default:
-
       TU_VERIFY(false);
     }
   }
@@ -528,16 +521,16 @@ bool usbtmcd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint
 
     case STATE_TX_INITIATED:
       if(usbtmc_state.transfer_size_remaining >=sizeof(usbtmc_state.ep_bulk_in_buf))
-    {
-        // FIXME! This removes const below!
-        TU_VERIFY( usbd_edpt_xfer(rhport, usbtmc_state.ep_bulk_in,
-            (void*)usbtmc_state.devInBuffer,sizeof(usbtmc_state.ep_bulk_in_buf)));
-        usbtmc_state.devInBuffer += sizeof(usbtmc_state.ep_bulk_in_buf);
-        usbtmc_state.transfer_size_remaining -= sizeof(usbtmc_state.ep_bulk_in_buf);
-        usbtmc_state.transfer_size_sent += sizeof(usbtmc_state.ep_bulk_in_buf);
-    }
-    else // last packet
-    {
+      {
+          // FIXME! This removes const below!
+          TU_VERIFY( usbd_edpt_xfer(rhport, usbtmc_state.ep_bulk_in,
+              (void*)(uintptr_t) usbtmc_state.devInBuffer, sizeof(usbtmc_state.ep_bulk_in_buf)));
+          usbtmc_state.devInBuffer += sizeof(usbtmc_state.ep_bulk_in_buf);
+          usbtmc_state.transfer_size_remaining -= sizeof(usbtmc_state.ep_bulk_in_buf);
+          usbtmc_state.transfer_size_sent += sizeof(usbtmc_state.ep_bulk_in_buf);
+      }
+      else // last packet
+      {
       size_t packetLen = usbtmc_state.transfer_size_remaining;
       memcpy(usbtmc_state.ep_bulk_in_buf, usbtmc_state.devInBuffer, usbtmc_state.transfer_size_remaining);
         usbtmc_state.transfer_size_sent += sizeof(usbtmc_state.transfer_size_remaining);
@@ -550,15 +543,18 @@ bool usbtmcd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint
         }
       }
       return true;
+
     case STATE_ABORTING_BULK_IN:
       // need to send short packet  (ZLP?)
       TU_VERIFY( usbd_edpt_xfer(rhport, usbtmc_state.ep_bulk_in, usbtmc_state.ep_bulk_in_buf,(uint16_t)0u));
       usbtmc_state.state = STATE_ABORTING_BULK_IN_SHORTED;
       return true;
+
     case STATE_ABORTING_BULK_IN_SHORTED:
       /* Done. :)*/
       usbtmc_state.state = STATE_ABORTING_BULK_IN_ABORTED;
-    return true;
+      return true;
+
     default:
       TU_ASSERT(false);
       return false;
@@ -787,7 +783,7 @@ bool usbtmcd_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request
     {
       TU_VERIFY(request->bmRequestType == 0xA1); // in,class,interface
       TU_VERIFY(request->wLength == sizeof(*(usbtmc_state.capabilities)));
-      TU_VERIFY(tud_control_xfer(rhport, request, (void*)usbtmc_state.capabilities, sizeof(*usbtmc_state.capabilities)));
+      TU_VERIFY(tud_control_xfer(rhport, request, (void*)(uintptr_t) usbtmc_state.capabilities, sizeof(*usbtmc_state.capabilities)));
       return true;
     }
   // USBTMC Optional Requests

src/class/usbtmc/usbtmc_device.h

@@ -1,9 +1,3 @@
-/*
- * usbtmc_device.h
- *
- *  Created on: Sep 10, 2019
- *      Author: nconrad
- */
 /*
  * The MIT License (MIT)
  *

src/class/video/video_device.c

@@ -585,8 +585,9 @@ static int handle_video_ctl_std_req(uint8_t rhport, uint8_t stage,
         tusb_desc_vc_itf_t const *vc = _get_desc_vc(&_videod_itf[ctl_idx]);
         TU_VERIFY(vc, VIDEO_ERROR_UNKNOWN);
 
-        TU_VERIFY(tud_control_xfer(rhport, request, (void*)&vc->std.bAlternateSetting, sizeof(vc->std.bAlternateSetting)),
-                  VIDEO_ERROR_UNKNOWN);
+        uint8_t alt_num = vc->std.bAlternateSetting;
+
+        TU_VERIFY(tud_control_xfer(rhport, request, &alt_num, sizeof(alt_num)), VIDEO_ERROR_UNKNOWN);
       }
       return VIDEO_ERROR_NONE;
 
@@ -637,7 +638,7 @@ static int handle_video_ctl_cs_req(uint8_t rhport, uint8_t stage,
           if (stage == CONTROL_STAGE_SETUP)
           {
             TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN);
-            TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)&_cap_get_set, sizeof(_cap_get_set)), VIDEO_ERROR_UNKNOWN);
+            TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)(uintptr_t) &_cap_get_set, sizeof(_cap_get_set)), VIDEO_ERROR_UNKNOWN);
           }
           return VIDEO_ERROR_NONE;
 
@@ -657,7 +658,7 @@ static int handle_video_ctl_cs_req(uint8_t rhport, uint8_t stage,
         case VIDEO_REQUEST_GET_INFO:
           if (stage == CONTROL_STAGE_SETUP)
           {
-            TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)&_cap_get, sizeof(_cap_get)), VIDEO_ERROR_UNKNOWN);
+            TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)(uintptr_t) &_cap_get, sizeof(_cap_get)), VIDEO_ERROR_UNKNOWN);
           }
           return VIDEO_ERROR_NONE;
 
@@ -708,7 +709,9 @@ static int handle_video_stm_std_req(uint8_t rhport, uint8_t stage,
         TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN);
         tusb_desc_vs_itf_t const *vs = _get_desc_vs(self);
         TU_VERIFY(vs, VIDEO_ERROR_UNKNOWN);
-        TU_VERIFY(tud_control_xfer(rhport, request, (void*)&vs->std.bAlternateSetting, sizeof(vs->std.bAlternateSetting)), VIDEO_ERROR_UNKNOWN);
+        uint8_t alt_num = vs->std.bAlternateSetting;
+
+        TU_VERIFY(tud_control_xfer(rhport, request, &alt_num, sizeof(alt_num)), VIDEO_ERROR_UNKNOWN);
       }
       return VIDEO_ERROR_NONE;
 
@@ -748,7 +751,7 @@ static int handle_video_stm_cs_req(uint8_t rhport, uint8_t stage,
         case VIDEO_REQUEST_GET_INFO:
           if (stage == CONTROL_STAGE_SETUP)
           {
-            TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)&_cap_get, sizeof(_cap_get)), VIDEO_ERROR_UNKNOWN);
+            TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)(uintptr_t) &_cap_get, sizeof(_cap_get)), VIDEO_ERROR_UNKNOWN);
           }
           return VIDEO_ERROR_NONE;
 
@@ -808,7 +811,7 @@ static int handle_video_stm_cs_req(uint8_t rhport, uint8_t stage,
           if (stage == CONTROL_STAGE_SETUP)
           {
             TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN);
-            TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)&_cap_get_set, sizeof(_cap_get_set)), VIDEO_ERROR_UNKNOWN);
+            TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)(uintptr_t) &_cap_get_set, sizeof(_cap_get_set)), VIDEO_ERROR_UNKNOWN);
           }
           return VIDEO_ERROR_NONE;
 
@@ -842,7 +845,7 @@ static int handle_video_stm_cs_req(uint8_t rhport, uint8_t stage,
           if (stage == CONTROL_STAGE_SETUP)
           {
             TU_VERIFY(1 == request->wLength, VIDEO_ERROR_UNKNOWN);
-            TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)&_cap_get_set, sizeof(_cap_get_set)), VIDEO_ERROR_UNKNOWN);
+            TU_VERIFY(tud_control_xfer(rhport, request, (uint8_t*)(uintptr_t) &_cap_get_set, sizeof(_cap_get_set)), VIDEO_ERROR_UNKNOWN);
           }
           return VIDEO_ERROR_NONE;
 

src/common/tusb_common.h

@@ -161,7 +161,6 @@ static inline uint8_t tu_log2(uint32_t value)
 #if TUP_ARCH_STRICT_ALIGN
 
 // Rely on compiler to generate correct code for unaligned access
-
 typedef struct { uint16_t val; } TU_ATTR_PACKED tu_unaligned_uint16_t;
 typedef struct { uint32_t val; } TU_ATTR_PACKED tu_unaligned_uint32_t;
 
@@ -227,8 +226,8 @@ TU_ATTR_ALWAYS_INLINE static inline void tu_unaligned_write16(void* mem, uint16_
 #else
 
 // MCU that could access unaligned memory natively
-TU_ATTR_ALWAYS_INLINE static inline uint32_t tu_unaligned_read32  (const void* mem           ) { return *((uint32_t*) mem);  }
-TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_unaligned_read16  (const void* mem           ) { return *((uint16_t*) mem);  }
+TU_ATTR_ALWAYS_INLINE static inline uint32_t tu_unaligned_read32  (const void* mem) { return *((uint32_t const *) mem); }
+TU_ATTR_ALWAYS_INLINE static inline uint16_t tu_unaligned_read16  (const void* mem) { return *((uint16_t const *) mem); }
 
 TU_ATTR_ALWAYS_INLINE static inline void     tu_unaligned_write32 (void* mem, uint32_t value ) { *((uint32_t*) mem) = value; }
 TU_ATTR_ALWAYS_INLINE static inline void     tu_unaligned_write16 (void* mem, uint16_t value ) { *((uint16_t*) mem) = value; }

src/common/tusb_fifo.c

@@ -102,7 +102,7 @@ static inline uint16_t _ff_mod(uint16_t idx, uint16_t depth)
 // TODO generalize with configurable 1 byte or 4 byte each read
 static void _ff_push_const_addr(uint8_t * ff_buf, const void * app_buf, uint16_t len)
 {
-  volatile uint32_t * rx_fifo = (volatile uint32_t *) app_buf;
+  volatile const uint32_t * rx_fifo = (volatile const uint32_t *) app_buf;
 
   // Reading full available 32 bit words from const app address
   uint16_t full_words = len >> 2;
@@ -201,7 +201,7 @@ static void _ff_push_n(tu_fifo_t* f, void const * app_buf, uint16_t n, uint16_t
         ff_buf += nLin_4n_bytes;
 
         // There could be odd 1-3 bytes before the wrap-around boundary
-        volatile uint32_t * rx_fifo = (volatile uint32_t *) app_buf;
+        volatile const uint32_t * rx_fifo = (volatile const uint32_t *) app_buf;
         uint8_t rem = nLin_bytes & 0x03;
         if (rem > 0)
         {

src/device/usbd.c

@@ -990,21 +990,23 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
     {
       TU_LOG2(" Device\r\n");
 
-      uint16_t len = sizeof(tusb_desc_device_t);
+      void* desc_device = (void*) (uintptr_t) tud_descriptor_device_cb();
 
-      // Only send up to EP0 Packet Size if not addressed and host requested more data
-      // that device descriptor has.
+      // Only response with exactly 1 Packet if: not addressed and host requested more data than device descriptor has.
       // This only happens with the very first get device descriptor and EP0 size = 8 or 16.
       if ((CFG_TUD_ENDPOINT0_SIZE < sizeof(tusb_desc_device_t)) && !_usbd_dev.addressed &&
-          ((tusb_control_request_t*) p_request)->wLength > sizeof(tusb_desc_device_t))
+          ((tusb_control_request_t const*) p_request)->wLength > sizeof(tusb_desc_device_t))
       {
-        len = CFG_TUD_ENDPOINT0_SIZE;
-
         // Hack here: we modify the request length to prevent usbd_control response with zlp
-        ((tusb_control_request_t*) p_request)->wLength = CFG_TUD_ENDPOINT0_SIZE;
-      }
+        // since we are responding with 1 packet & less data than wLength.
+        tusb_control_request_t mod_request = *p_request;
+        mod_request.wLength = CFG_TUD_ENDPOINT0_SIZE;
 
-      return tud_control_xfer(rhport, p_request, (void*) tud_descriptor_device_cb(), len);
+        tud_control_xfer(rhport, &mod_request, desc_device, CFG_TUD_ENDPOINT0_SIZE);
+      }else
+      {
+        return tud_control_xfer(rhport, p_request, desc_device, sizeof(tusb_desc_device_t));
+      }
     }
     break;
 
@@ -1015,10 +1017,11 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
       // requested by host if USB > 2.0 ( i.e 2.1 or 3.x )
       if (!tud_descriptor_bos_cb) return false;
 
-      tusb_desc_bos_t const* desc_bos = (tusb_desc_bos_t const*) tud_descriptor_bos_cb();
+      uintptr_t desc_bos = (uintptr_t) tud_descriptor_bos_cb();
+      TU_ASSERT(desc_bos);
 
       // Use offsetof to avoid pointer to the odd/misaligned address
-      uint16_t const total_len = tu_le16toh( tu_unaligned_read16((uint8_t*) desc_bos + offsetof(tusb_desc_bos_t, wTotalLength)) );
+      uint16_t const total_len = tu_le16toh( tu_unaligned_read16((const void*) (desc_bos + offsetof(tusb_desc_bos_t, wTotalLength))) );
 
       return tud_control_xfer(rhport, p_request, (void*) desc_bos, total_len);
     }
@@ -1027,24 +1030,24 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
     case TUSB_DESC_CONFIGURATION:
     case TUSB_DESC_OTHER_SPEED_CONFIG:
     {
-      tusb_desc_configuration_t const* desc_config;
+      uintptr_t desc_config;
 
       if ( desc_type == TUSB_DESC_CONFIGURATION )
       {
         TU_LOG2(" Configuration[%u]\r\n", desc_index);
-        desc_config = (tusb_desc_configuration_t const*) tud_descriptor_configuration_cb(desc_index);
+        desc_config = (uintptr_t) tud_descriptor_configuration_cb(desc_index);
       }else
       {
         // Host only request this after getting Device Qualifier descriptor
         TU_LOG2(" Other Speed Configuration\r\n");
         TU_VERIFY( tud_descriptor_other_speed_configuration_cb );
-        desc_config = (tusb_desc_configuration_t const*) tud_descriptor_other_speed_configuration_cb(desc_index);
+        desc_config = (uintptr_t) tud_descriptor_other_speed_configuration_cb(desc_index);
       }
 
       TU_ASSERT(desc_config);
 
       // Use offsetof to avoid pointer to the odd/misaligned address
-      uint16_t const total_len = tu_le16toh( tu_unaligned_read16((uint8_t*) desc_config + offsetof(tusb_desc_configuration_t, wTotalLength)) );
+      uint16_t const total_len = tu_le16toh( tu_unaligned_read16((const void*) (desc_config + offsetof(tusb_desc_configuration_t, wTotalLength))) );
 
       return tud_control_xfer(rhport, p_request, (void*) desc_config, total_len);
     }
@@ -1055,11 +1058,11 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
       TU_LOG2(" String[%u]\r\n", desc_index);
 
       // String Descriptor always uses the desc set from user
-      uint8_t const* desc_str = (uint8_t const*) tud_descriptor_string_cb(desc_index, p_request->wIndex);
+      uint8_t const* desc_str = (uint8_t const*) tud_descriptor_string_cb(desc_index, tu_le16toh(p_request->wIndex));
       TU_VERIFY(desc_str);
 
       // first byte of descriptor is its size
-      return tud_control_xfer(rhport, p_request, (void*) desc_str, desc_str[0]);
+      return tud_control_xfer(rhport, p_request, (void*) (uintptr_t) desc_str, tu_desc_len(desc_str));
     }
     break;
 
@@ -1073,7 +1076,7 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
       TU_VERIFY(desc_qualifier);
 
       // first byte of descriptor is its size
-      return tud_control_xfer(rhport, p_request, (void*) desc_qualifier, desc_qualifier[0]);
+      return tud_control_xfer(rhport, p_request, (void*) (uintptr_t) desc_qualifier, tu_desc_len(desc_qualifier));
     }
     break;
 

src/portable/nordic/nrf5x/dcd_nrf5x.c

@@ -125,7 +125,7 @@ static void edpt_dma_start(volatile uint32_t* reg_startep)
     if (is_in_isr())
     {
       // Called within ISR, use usbd task to defer later
-      usbd_defer_func( (osal_task_func_t) edpt_dma_start, (void*) reg_startep, true );
+      usbd_defer_func((osal_task_func_t) edpt_dma_start, (void*) (uintptr_t) reg_startep, true);
       return;
     }
     else
@@ -773,7 +773,7 @@ void dcd_int_handler(uint8_t rhport)
           if ( _dcd.dma_pending )
           {
             // use usbd task to defer later
-            usbd_defer_func( (osal_task_func_t) start_ep0_task, (void*) &NRF_USBD->TASKS_EP0RCVOUT, true );
+            usbd_defer_func((osal_task_func_t) start_ep0_task, (void*) (uintptr_t) &NRF_USBD->TASKS_EP0RCVOUT, true);
           }else
           {
             start_ep0_task(&NRF_USBD->TASKS_EP0RCVOUT);