Merge pull request #1534 from hathach/add-more-warnings

Add more warnings

58 files changed, 193 insertions, 71 deletions

diff --git a/examples/device/audio_4_channel_mic/CMakeLists.txt b/examples/device/audio_4_channel_mic/CMakeLists.txt
index f6e10e2ea..e6ce2813e 100644
--- a/examples/device/audio_4_channel_mic/CMakeLists.txt
+++ b/examples/device/audio_4_channel_mic/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
   ${CMAKE_CURRENT_SOURCE_DIR}/src
 )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
diff --git a/examples/device/audio_4_channel_mic/src/main.c b/examples/device/audio_4_channel_mic/src/main.c
index 9c94edd49..a6af5fd19 100644
--- a/examples/device/audio_4_channel_mic/src/main.c
+++ b/examples/device/audio_4_channel_mic/src/main.c
@@ -221,7 +221,7 @@ bool tud_audio_set_req_entity_cb(uint8_t rhport, tusb_control_request_t const *
         // Request uses format layout 2
         TU_VERIFY(p_request->wLength == sizeof(audio_control_cur_2_t));
 
-        volume[channelNum] = ((audio_control_cur_2_t*) pBuff)->bCur;
+        volume[channelNum] = (uint16_t) ((audio_control_cur_2_t*) pBuff)->bCur;
 
         TU_LOG2("    Set Volume: %d dB of channel: %u\r\n", volume[channelNum], channelNum);
       return true;
diff --git a/examples/device/audio_4_channel_mic/src/usb_descriptors.c b/examples/device/audio_4_channel_mic/src/usb_descriptors.c
index 93ae2ea47..8929f3057 100644
--- a/examples/device/audio_4_channel_mic/src/usb_descriptors.c
+++ b/examples/device/audio_4_channel_mic/src/usb_descriptors.c
@@ -149,7 +149,7 @@ 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;
 
     for(uint8_t i=0; i<chr_count; i++)
@@ -159,7 +159,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/audio_test/CMakeLists.txt b/examples/device/audio_test/CMakeLists.txt
index cb321f9a8..416b91665 100644
--- a/examples/device/audio_test/CMakeLists.txt
+++ b/examples/device/audio_test/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
   ${CMAKE_CURRENT_SOURCE_DIR}/src
 )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/audio_test/src/main.c b/examples/device/audio_test/src/main.c
index 51f55b772..d0849c7ac 100644
--- a/examples/device/audio_test/src/main.c
+++ b/examples/device/audio_test/src/main.c
@@ -222,7 +222,7 @@ bool tud_audio_set_req_entity_cb(uint8_t rhport, tusb_control_request_t const *
         // Request uses format layout 2
         TU_VERIFY(p_request->wLength == sizeof(audio_control_cur_2_t));
 
-        volume[channelNum] = ((audio_control_cur_2_t*) pBuff)->bCur;
+        volume[channelNum] = (uint16_t) ((audio_control_cur_2_t*) pBuff)->bCur;
 
         TU_LOG2("    Set Volume: %d dB of channel: %u\r\n", volume[channelNum], channelNum);
       return true;
diff --git a/examples/device/audio_test/src/usb_descriptors.c b/examples/device/audio_test/src/usb_descriptors.c
index 09b2a2d45..da3e203d7 100644
--- a/examples/device/audio_test/src/usb_descriptors.c
+++ b/examples/device/audio_test/src/usb_descriptors.c
@@ -149,7 +149,7 @@ 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;
 
     for(uint8_t i=0; i<chr_count; i++)
@@ -159,7 +159,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/board_test/CMakeLists.txt b/examples/device/board_test/CMakeLists.txt
index 37113578e..ac530a928 100644
--- a/examples/device/board_test/CMakeLists.txt
+++ b/examples/device/board_test/CMakeLists.txt
@@ -36,6 +36,9 @@ else()
           ${CMAKE_CURRENT_SOURCE_DIR}/src
           )
 
+  # Example common such as compiler warnings
+  include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
   # Configure compilation flags and libraries for the example... see the corresponding function
   # in hw/bsp/FAMILY/family.cmake for details.
   family_configure_device_example(${PROJECT})
diff --git a/examples/device/cdc_dual_ports/CMakeLists.txt b/examples/device/cdc_dual_ports/CMakeLists.txt
index abc4d91da..438635958 100644
--- a/examples/device/cdc_dual_ports/CMakeLists.txt
+++ b/examples/device/cdc_dual_ports/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/cdc_dual_ports/src/usb_descriptors.c b/examples/device/cdc_dual_ports/src/usb_descriptors.c
index aa400d486..cda1b63b6 100644
--- a/examples/device/cdc_dual_ports/src/usb_descriptors.c
+++ b/examples/device/cdc_dual_ports/src/usb_descriptors.c
@@ -236,7 +236,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -247,7 +247,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/cdc_msc/CMakeLists.txt b/examples/device/cdc_msc/CMakeLists.txt
index fa6e83b7e..04c7c1b26 100644
--- a/examples/device/cdc_msc/CMakeLists.txt
+++ b/examples/device/cdc_msc/CMakeLists.txt
@@ -24,6 +24,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/cdc_msc/src/usb_descriptors.c b/examples/device/cdc_msc/src/usb_descriptors.c
index 09894cf1b..6b59ed50f 100644
--- a/examples/device/cdc_msc/src/usb_descriptors.c
+++ b/examples/device/cdc_msc/src/usb_descriptors.c
@@ -282,7 +282,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/cdc_msc_freertos/Makefile b/examples/device/cdc_msc_freertos/Makefile
index a155d6cb7..3352dd37d 100644
--- a/examples/device/cdc_msc_freertos/Makefile
+++ b/examples/device/cdc_msc_freertos/Makefile
@@ -30,7 +30,7 @@ SRC_C += \
 	$(subst ../../../,,$(wildcard ../../../$(FREERTOS_SRC)/portable/GCC/$(FREERTOS_PORT)/*.c))
 
 # Suppress FreeRTOS warnings
-CFLAGS += -Wno-error=cast-qual
+CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
 
 # FreeRTOS (lto + Os) linker issue
 LDFLAGS += -Wl,--undefined=vTaskSwitchContext
diff --git a/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h b/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
index ccb620720..6a3630dbc 100644
--- a/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
+++ b/examples/device/cdc_msc_freertos/src/FreeRTOSConfig/FreeRTOSConfig.h
@@ -53,6 +53,7 @@
 #if CFG_TUSB_MCU == OPT_MCU_MM32F327X
   extern u32 SystemCoreClock;
 #else
+  // FIXME cause redundant-decls warnings
   extern uint32_t SystemCoreClock;
 #endif
 
diff --git a/examples/device/cdc_msc_freertos/src/usb_descriptors.c b/examples/device/cdc_msc_freertos/src/usb_descriptors.c
index 9585822a3..30a712275 100644
--- a/examples/device/cdc_msc_freertos/src/usb_descriptors.c
+++ b/examples/device/cdc_msc_freertos/src/usb_descriptors.c
@@ -247,7 +247,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -258,7 +258,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/dfu/CMakeLists.txt b/examples/device/dfu/CMakeLists.txt
index abc4d91da..121ab3852 100644
--- a/examples/device/dfu/CMakeLists.txt
+++ b/examples/device/dfu/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
-family_configure_device_example(${PROJECT})
\ No newline at end of file
+family_configure_device_example(${PROJECT})
diff --git a/examples/device/dfu/src/usb_descriptors.c b/examples/device/dfu/src/usb_descriptors.c
index 350334aa5..51a0d09f5 100644
--- a/examples/device/dfu/src/usb_descriptors.c
+++ b/examples/device/dfu/src/usb_descriptors.c
@@ -152,7 +152,7 @@ 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;
     }
diff --git a/examples/device/dfu_runtime/CMakeLists.txt b/examples/device/dfu_runtime/CMakeLists.txt
index abc4d91da..438635958 100644
--- a/examples/device/dfu_runtime/CMakeLists.txt
+++ b/examples/device/dfu_runtime/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/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;
 }
diff --git a/examples/device/dynamic_configuration/CMakeLists.txt b/examples/device/dynamic_configuration/CMakeLists.txt
index fa6e83b7e..04c7c1b26 100644
--- a/examples/device/dynamic_configuration/CMakeLists.txt
+++ b/examples/device/dynamic_configuration/CMakeLists.txt
@@ -24,6 +24,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/dynamic_configuration/src/main.c b/examples/device/dynamic_configuration/src/main.c
index 95f8b8286..33a603343 100644
--- a/examples/device/dynamic_configuration/src/main.c
+++ b/examples/device/dynamic_configuration/src/main.c
@@ -181,7 +181,7 @@ void midi_task(void)
   start_ms += 286;
 
   // Previous positions in the note sequence.
-  int previous = note_pos - 1;
+  int previous = (int) (note_pos - 1);
 
   // If we currently are at position 0, set the
   // previous position to the last note in the sequence.
diff --git a/examples/device/dynamic_configuration/src/msc_disk.c b/examples/device/dynamic_configuration/src/msc_disk.c
index a895f4738..e8cb03fdd 100644
--- a/examples/device/dynamic_configuration/src/msc_disk.c
+++ b/examples/device/dynamic_configuration/src/msc_disk.c
@@ -184,7 +184,7 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff
   uint8_t const* addr = msc_disk[lba] + offset;
   memcpy(buffer, addr, bufsize);
 
-  return bufsize;
+  return (int32_t) bufsize;
 }
 
 // Callback invoked when received WRITE10 command.
@@ -203,7 +203,7 @@ int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t*
   (void) lba; (void) offset; (void) buffer;
 #endif
 
-  return bufsize;
+  return (int32_t) bufsize;
 }
 
 // Callback invoked when received an SCSI command not in built-in list below
@@ -237,7 +237,7 @@ int32_t tud_msc_scsi_cb (uint8_t lun, uint8_t const scsi_cmd[16], void* buffer,
   {
     if(in_xfer)
     {
-      memcpy(buffer, response, resplen);
+      memcpy(buffer, response, (size_t) resplen);
     }else
     {
       // SCSI output
diff --git a/examples/device/dynamic_configuration/src/usb_descriptors.c b/examples/device/dynamic_configuration/src/usb_descriptors.c
index b88f20163..457f774d0 100644
--- a/examples/device/dynamic_configuration/src/usb_descriptors.c
+++ b/examples/device/dynamic_configuration/src/usb_descriptors.c
@@ -226,7 +226,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -237,7 +237,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/hid_boot_interface/CMakeLists.txt b/examples/device/hid_boot_interface/CMakeLists.txt
index abc4d91da..438635958 100644
--- a/examples/device/hid_boot_interface/CMakeLists.txt
+++ b/examples/device/hid_boot_interface/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/hid_boot_interface/src/usb_descriptors.c b/examples/device/hid_boot_interface/src/usb_descriptors.c
index 3fa48d98d..a0d7e9f15 100644
--- a/examples/device/hid_boot_interface/src/usb_descriptors.c
+++ b/examples/device/hid_boot_interface/src/usb_descriptors.c
@@ -163,7 +163,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -174,7 +174,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/hid_composite/CMakeLists.txt b/examples/device/hid_composite/CMakeLists.txt
index abc4d91da..438635958 100644
--- a/examples/device/hid_composite/CMakeLists.txt
+++ b/examples/device/hid_composite/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/hid_composite/src/usb_descriptors.c b/examples/device/hid_composite/src/usb_descriptors.c
index e760b20ba..2988baee2 100644
--- a/examples/device/hid_composite/src/usb_descriptors.c
+++ b/examples/device/hid_composite/src/usb_descriptors.c
@@ -210,7 +210,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -221,7 +221,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/hid_composite_freertos/Makefile b/examples/device/hid_composite_freertos/Makefile
index c9b7abdf5..6c8c43ddd 100644
--- a/examples/device/hid_composite_freertos/Makefile
+++ b/examples/device/hid_composite_freertos/Makefile
@@ -29,7 +29,7 @@ SRC_C += \
 	$(subst ../../../,,$(wildcard ../../../$(FREERTOS_SRC)/portable/GCC/$(FREERTOS_PORT)/*.c))
 
 # Suppress FreeRTOS warnings
-CFLAGS += -Wno-error=cast-qual
+CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
 
 # FreeRTOS (lto + Os) linker issue
 LDFLAGS += -Wl,--undefined=vTaskSwitchContext
diff --git a/examples/device/hid_composite_freertos/src/usb_descriptors.c b/examples/device/hid_composite_freertos/src/usb_descriptors.c
index 791813fdf..4df12d3db 100644
--- a/examples/device/hid_composite_freertos/src/usb_descriptors.c
+++ b/examples/device/hid_composite_freertos/src/usb_descriptors.c
@@ -208,7 +208,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -219,7 +219,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/hid_generic_inout/CMakeLists.txt b/examples/device/hid_generic_inout/CMakeLists.txt
index abc4d91da..438635958 100644
--- a/examples/device/hid_generic_inout/CMakeLists.txt
+++ b/examples/device/hid_generic_inout/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/hid_generic_inout/src/usb_descriptors.c b/examples/device/hid_generic_inout/src/usb_descriptors.c
index 5dabf42a3..c2b4792c8 100644
--- a/examples/device/hid_generic_inout/src/usb_descriptors.c
+++ b/examples/device/hid_generic_inout/src/usb_descriptors.c
@@ -153,7 +153,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -164,7 +164,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/hid_multiple_interface/CMakeLists.txt b/examples/device/hid_multiple_interface/CMakeLists.txt
index abc4d91da..438635958 100644
--- a/examples/device/hid_multiple_interface/CMakeLists.txt
+++ b/examples/device/hid_multiple_interface/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/hid_multiple_interface/src/usb_descriptors.c b/examples/device/hid_multiple_interface/src/usb_descriptors.c
index 9eef21504..42471a961 100644
--- a/examples/device/hid_multiple_interface/src/usb_descriptors.c
+++ b/examples/device/hid_multiple_interface/src/usb_descriptors.c
@@ -171,7 +171,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -182,7 +182,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/midi_test/CMakeLists.txt b/examples/device/midi_test/CMakeLists.txt
index abc4d91da..438635958 100644
--- a/examples/device/midi_test/CMakeLists.txt
+++ b/examples/device/midi_test/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/midi_test/src/main.c b/examples/device/midi_test/src/main.c
index b47d1af76..3310348bd 100644
--- a/examples/device/midi_test/src/main.c
+++ b/examples/device/midi_test/src/main.c
@@ -140,7 +140,7 @@ void midi_task(void)
   start_ms += 286;
 
   // Previous positions in the note sequence.
-  int previous = note_pos - 1;
+  int previous = (int) (note_pos - 1);
 
   // If we currently are at position 0, set the
   // previous position to the last note in the sequence.
diff --git a/examples/device/midi_test/src/usb_descriptors.c b/examples/device/midi_test/src/usb_descriptors.c
index 8444237c6..c84a873b1 100644
--- a/examples/device/midi_test/src/usb_descriptors.c
+++ b/examples/device/midi_test/src/usb_descriptors.c
@@ -166,7 +166,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -177,7 +177,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/msc_dual_lun/CMakeLists.txt b/examples/device/msc_dual_lun/CMakeLists.txt
index 9e834ae21..518eac3ad 100644
--- a/examples/device/msc_dual_lun/CMakeLists.txt
+++ b/examples/device/msc_dual_lun/CMakeLists.txt
@@ -24,6 +24,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/msc_dual_lun/src/msc_disk_dual.c b/examples/device/msc_dual_lun/src/msc_disk_dual.c
index 37446ebc3..2b773b43b 100644
--- a/examples/device/msc_dual_lun/src/msc_disk_dual.c
+++ b/examples/device/msc_dual_lun/src/msc_disk_dual.c
@@ -277,7 +277,7 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff
   uint8_t const* addr = (lun ? msc_disk1[lba] : msc_disk0[lba]) + offset;
   memcpy(buffer, addr, bufsize);
 
-  return bufsize;
+  return (int32_t) bufsize;
 }
 
 bool tud_msc_is_writable_cb (uint8_t lun)
@@ -305,7 +305,7 @@ int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t*
   (void) lun; (void) lba; (void) offset; (void) buffer;
 #endif
 
-  return bufsize;
+  return (int32_t) bufsize;
 }
 
 // Callback invoked when received an SCSI command not in built-in list below
@@ -339,7 +339,7 @@ int32_t tud_msc_scsi_cb (uint8_t lun, uint8_t const scsi_cmd[16], void* buffer,
   {
     if(in_xfer)
     {
-      memcpy(buffer, response, resplen);
+      memcpy(buffer, response, (size_t) resplen);
     }else
     {
       // SCSI output
diff --git a/examples/device/msc_dual_lun/src/usb_descriptors.c b/examples/device/msc_dual_lun/src/usb_descriptors.c
index 2afd391af..68a671c91 100644
--- a/examples/device/msc_dual_lun/src/usb_descriptors.c
+++ b/examples/device/msc_dual_lun/src/usb_descriptors.c
@@ -168,7 +168,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -179,7 +179,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/net_lwip_webserver/CMakeLists.txt b/examples/device/net_lwip_webserver/CMakeLists.txt
index 8e3f0f5a8..0f41b888a 100644
--- a/examples/device/net_lwip_webserver/CMakeLists.txt
+++ b/examples/device/net_lwip_webserver/CMakeLists.txt
@@ -69,6 +69,17 @@ if (EXISTS ${TOP}/lib/lwip/src)
             ${TOP}/lib/networking/rndis_reports.c
             )
 
+    # Example common such as compiler warnings
+    include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
+    # due to warnings from other net source, we need to prevent error from some of the warnings options
+    target_compile_options(${PROJECT} PUBLIC
+        -Wno-error=null-dereference
+        -Wno-error=conversion
+        -Wno-error=sign-conversion
+        -Wno-error=sign-compare
+        )
+
     # 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})
diff --git a/examples/device/net_lwip_webserver/src/usb_descriptors.c b/examples/device/net_lwip_webserver/src/usb_descriptors.c
index 2b4b2a0c3..bee51790a 100644
--- a/examples/device/net_lwip_webserver/src/usb_descriptors.c
+++ b/examples/device/net_lwip_webserver/src/usb_descriptors.c
@@ -231,7 +231,7 @@ 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 > (TU_ARRAY_SIZE(_desc_str) - 1)) chr_count = TU_ARRAY_SIZE(_desc_str) - 1;
 
     // Convert ASCII string into UTF-16
@@ -242,7 +242,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/uac2_headset/CMakeLists.txt b/examples/device/uac2_headset/CMakeLists.txt
index abc4d91da..438635958 100644
--- a/examples/device/uac2_headset/CMakeLists.txt
+++ b/examples/device/uac2_headset/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/uac2_headset/src/main.c b/examples/device/uac2_headset/src/main.c
index a8d204eaa..003dc2a74 100644
--- a/examples/device/uac2_headset/src/main.c
+++ b/examples/device/uac2_headset/src/main.c
@@ -159,7 +159,7 @@ static bool tud_audio_clock_get_request(uint8_t rhport, audio_control_request_t
     {
       TU_LOG1("Clock get current freq %lu\r\n", current_sample_rate);
 
-      audio_control_cur_4_t curf = { tu_htole32(current_sample_rate) };
+      audio_control_cur_4_t curf = { (int32_t) tu_htole32(current_sample_rate) };
       return tud_audio_buffer_and_schedule_control_xfer(rhport, (tusb_control_request_t const *)request, &curf, sizeof(curf));
     }
     else if (request->bRequest == AUDIO_CS_REQ_RANGE)
@@ -171,8 +171,8 @@ static bool tud_audio_clock_get_request(uint8_t rhport, audio_control_request_t
       TU_LOG1("Clock get %d freq ranges\r\n", N_SAMPLE_RATES);
       for(uint8_t i = 0; i < N_SAMPLE_RATES; i++)
       {
-        rangef.subrange[i].bMin = sample_rates[i];
-        rangef.subrange[i].bMax = sample_rates[i];
+        rangef.subrange[i].bMin = (int32_t) sample_rates[i];
+        rangef.subrange[i].bMax = (int32_t) sample_rates[i];
         rangef.subrange[i].bRes = 0;
         TU_LOG1("Range %d (%d, %d, %d)\r\n", i, (int)rangef.subrange[i].bMin, (int)rangef.subrange[i].bMax, (int)rangef.subrange[i].bRes);
       }
@@ -204,7 +204,7 @@ static bool tud_audio_clock_set_request(uint8_t rhport, audio_control_request_t
   {
     TU_VERIFY(request->wLength == sizeof(audio_control_cur_4_t));
 
-    current_sample_rate = ((audio_control_cur_4_t const *)buf)->bCur;
+    current_sample_rate = (uint32_t) ((audio_control_cur_4_t const *)buf)->bCur;
 
     TU_LOG1("Clock set current freq: %ld\r\n", current_sample_rate);
 
@@ -403,9 +403,9 @@ void audio_task(void)
         // Combine two channels into one
         int32_t left = *src++;
         int32_t right = *src++;
-        *dst++ = (left >> 1) + (right >> 1);
+        *dst++ = (int16_t) ((left >> 1) + (right >> 1));
       }
-      tud_audio_write((uint8_t *)mic_buf, spk_data_size / 2);
+      tud_audio_write((uint8_t *)mic_buf, (uint16_t) (spk_data_size / 2));
       spk_data_size = 0;
     }
     else if (current_resolution == 24)
@@ -418,9 +418,9 @@ void audio_task(void)
         // Combine two channels into one
         int32_t left = *src++;
         int32_t right = *src++;
-        *dst++ = ((left >> 1) + (right >> 1)) & 0xffffff00;
+        *dst++ = (int32_t) ((uint32_t) ((left >> 1) + (right >> 1)) & 0xffffff00ul);
       }
-      tud_audio_write((uint8_t *)mic_buf, spk_data_size / 2);
+      tud_audio_write((uint8_t *)mic_buf, (uint16_t) (spk_data_size / 2));
       spk_data_size = 0;
     }
   }
diff --git a/examples/device/uac2_headset/src/usb_descriptors.c b/examples/device/uac2_headset/src/usb_descriptors.c
index 9e97845b8..10f5cbd27 100644
--- a/examples/device/uac2_headset/src/usb_descriptors.c
+++ b/examples/device/uac2_headset/src/usb_descriptors.c
@@ -155,7 +155,7 @@ 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;
 
     for (uint8_t i = 0; i < chr_count; i++)
@@ -165,7 +165,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2 * chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/usbtmc/CMakeLists.txt b/examples/device/usbtmc/CMakeLists.txt
index c49603c26..74f81b24f 100644
--- a/examples/device/usbtmc/CMakeLists.txt
+++ b/examples/device/usbtmc/CMakeLists.txt
@@ -24,6 +24,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/usbtmc/src/usb_descriptors.c b/examples/device/usbtmc/src/usb_descriptors.c
index 423482634..770a97436 100644
--- a/examples/device/usbtmc/src/usb_descriptors.c
+++ b/examples/device/usbtmc/src/usb_descriptors.c
@@ -175,7 +175,7 @@ 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;
     }
diff --git a/examples/device/video_capture/CMakeLists.txt b/examples/device/video_capture/CMakeLists.txt
index cb321f9a8..416b91665 100644
--- a/examples/device/video_capture/CMakeLists.txt
+++ b/examples/device/video_capture/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
   ${CMAKE_CURRENT_SOURCE_DIR}/src
 )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/video_capture/src/usb_descriptors.c b/examples/device/video_capture/src/usb_descriptors.c
index da8ec8e89..5c97f4fe1 100644
--- a/examples/device/video_capture/src/usb_descriptors.c
+++ b/examples/device/video_capture/src/usb_descriptors.c
@@ -149,7 +149,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/device/webusb_serial/CMakeLists.txt b/examples/device/webusb_serial/CMakeLists.txt
index abc4d91da..438635958 100644
--- a/examples/device/webusb_serial/CMakeLists.txt
+++ b/examples/device/webusb_serial/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})
\ No newline at end of file
diff --git a/examples/device/webusb_serial/src/usb_descriptors.c b/examples/device/webusb_serial/src/usb_descriptors.c
index 93e802a90..cafe2c22b 100644
--- a/examples/device/webusb_serial/src/usb_descriptors.c
+++ b/examples/device/webusb_serial/src/usb_descriptors.c
@@ -235,7 +235,7 @@ 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;
 
     // Convert ASCII string into UTF-16
@@ -246,7 +246,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/dual/host_hid_to_device_cdc/CMakeLists.txt b/examples/dual/host_hid_to_device_cdc/CMakeLists.txt
index ea4e087e3..909ee423f 100644
--- a/examples/dual/host_hid_to_device_cdc/CMakeLists.txt
+++ b/examples/dual/host_hid_to_device_cdc/CMakeLists.txt
@@ -23,6 +23,21 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
+# due to warnings from other net source, we need to prevent error from some of the warnings options
+target_compile_options(${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
+        )
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_dual_usb_example(${PROJECT})
diff --git a/examples/dual/host_hid_to_device_cdc/src/main.c b/examples/dual/host_hid_to_device_cdc/src/main.c
index 6a25a28da..bd7870274 100644
--- a/examples/dual/host_hid_to_device_cdc/src/main.c
+++ b/examples/dual/host_hid_to_device_cdc/src/main.c
@@ -160,7 +160,7 @@ void tuh_hid_mount_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_re
   char tempbuf[256];
   int count = sprintf(tempbuf, "[%04x:%04x][%u] HID Interface%u, Protocol = %s\r\n", vid, pid, dev_addr, instance, protocol_str[itf_protocol]);
 
-  tud_cdc_write(tempbuf, count);
+  tud_cdc_write(tempbuf, (uint32_t) count);
   tud_cdc_write_flush();
 
   // Receive report from boot keyboard & mouse only
@@ -179,7 +179,7 @@ void tuh_hid_umount_cb(uint8_t dev_addr, uint8_t instance)
 {
   char tempbuf[256];
   int count = sprintf(tempbuf, "[%u] HID Interface%u is unmounted\r\n", dev_addr, instance);
-  tud_cdc_write(tempbuf, count);
+  tud_cdc_write(tempbuf, (uint32_t) count);
   tud_cdc_write_flush();
 }
 
@@ -251,7 +251,7 @@ static void process_mouse_report(uint8_t dev_addr, hid_mouse_report_t const * re
   char tempbuf[32];
   int count = sprintf(tempbuf, "[%u] %c%c%c %d %d %d\r\n", dev_addr, l, m, r, report->x, report->y, report->wheel);
 
-  tud_cdc_write(tempbuf, count);
+  tud_cdc_write(tempbuf, (uint32_t) count);
   tud_cdc_write_flush();
 }
 
diff --git a/examples/dual/host_hid_to_device_cdc/src/usb_descriptors.c b/examples/dual/host_hid_to_device_cdc/src/usb_descriptors.c
index e55899f65..6b0a89127 100644
--- a/examples/dual/host_hid_to_device_cdc/src/usb_descriptors.c
+++ b/examples/dual/host_hid_to_device_cdc/src/usb_descriptors.c
@@ -259,7 +259,7 @@ 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] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+  _desc_str[0] = (uint16_t) ((TUSB_DESC_STRING << 8 ) | (2*chr_count + 2));
 
   return _desc_str;
 }
diff --git a/examples/example.cmake b/examples/example.cmake
new file mode 100644
index 000000000..6bb82a56d
--- /dev/null
+++ b/examples/example.cmake
@@ -0,0 +1,25 @@
+target_compile_options(${PROJECT} PUBLIC
+        -Wall
+        -Wextra
+        -Werror
+        -Wfatal-errors
+        -Wdouble-promotion
+        #-Wstrict-prototypes
+        -Wstrict-overflow
+        #-Werror-implicit-function-declaration
+        -Wfloat-equal
+        #-Wundef
+        -Wshadow
+        -Wwrite-strings
+        -Wsign-compare
+        -Wmissing-format-attribute
+        -Wunreachable-code
+        -Wcast-align
+        -Wcast-function-type
+        -Wcast-qual
+        -Wnull-dereference
+        -Wuninitialized
+        -Wunused
+        -Wredundant-decls
+        -Wconversion
+        )
diff --git a/examples/host/bare_api/CMakeLists.txt b/examples/host/bare_api/CMakeLists.txt
index bc04b01a7..98540ffb0 100644
--- a/examples/host/bare_api/CMakeLists.txt
+++ b/examples/host/bare_api/CMakeLists.txt
@@ -22,6 +22,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_host_example(${PROJECT})
diff --git a/examples/host/bare_api/src/main.c b/examples/host/bare_api/src/main.c
index 9ccd856d4..51cab2de0 100644
--- a/examples/host/bare_api/src/main.c
+++ b/examples/host/bare_api/src/main.c
@@ -189,7 +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;
@@ -244,7 +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;
@@ -377,7 +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));
@@ -405,12 +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/cdc_msc_hid/CMakeLists.txt b/examples/host/cdc_msc_hid/CMakeLists.txt
index c4a4d8e63..6990e957b 100644
--- a/examples/host/cdc_msc_hid/CMakeLists.txt
+++ b/examples/host/cdc_msc_hid/CMakeLists.txt
@@ -24,6 +24,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_host_example(${PROJECT})
diff --git a/examples/host/hid_controller/CMakeLists.txt b/examples/host/hid_controller/CMakeLists.txt
index 6153d399a..eefeb4a49 100644
--- a/examples/host/hid_controller/CMakeLists.txt
+++ b/examples/host/hid_controller/CMakeLists.txt
@@ -23,6 +23,9 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
+# Example common such as compiler warnings
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
+
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_host_example(${PROJECT})
diff --git a/examples/make.mk b/examples/make.mk
index bed46d02b..27e1db38c 100644
--- a/examples/make.mk
+++ b/examples/make.mk
@@ -90,13 +90,13 @@ CFLAGS += \
   -ffunction-sections \
   -fsingle-precision-constant \
   -fno-strict-aliasing \
-  -Wdouble-promotion \
-  -Wstrict-prototypes \
-  -Wstrict-overflow \
   -Wall \
   -Wextra \
   -Werror \
   -Wfatal-errors \
+  -Wdouble-promotion \
+  -Wstrict-prototypes \
+  -Wstrict-overflow \
   -Werror-implicit-function-declaration \
   -Wfloat-equal \
   -Wundef \
@@ -108,8 +108,14 @@ CFLAGS += \
   -Wcast-align \
   -Wcast-function-type \
   -Wcast-qual \
-  -Wnull-dereference
+  -Wnull-dereference \
+  -Wuninitialized \
+  -Wunused \
+  -Wredundant-decls
 
+# conversion is too strict for most mcu driver, may be disable sign/int/arith-conversion
+#  -Wconversion
+  
 # Debugging/Optimization
 ifeq ($(DEBUG), 1)
   CFLAGS += -Og