split out the nasty usb code into a separate class (for bot3)
diff --git a/gyro_board/src/usb/data_struct.h b/gyro_board/src/usb/data_struct.h
index 4470476..6c99195 100644
--- a/gyro_board/src/usb/data_struct.h
+++ b/gyro_board/src/usb/data_struct.h
@@ -107,6 +107,5 @@
// TODO(brians): Consider using C1X's _Static_assert once we have a compiler
// (GCC 4.6) + flags that support it.
static_assert(sizeof(DATA_STRUCT_NAME) <= DATA_STRUCT_SEND_SIZE,
- "We only have room for " STRINGIFY(DATA_STRUCT_SEND_SIZE)
- " bytes in the USB packet.");
+ "The sensor data structure is too big.");
#endif // defined(__cplusplus)