ccollins476ad commented on a change in pull request #2175: da1469x: add initial 
crypto driver
URL: https://github.com/apache/mynewt-core/pull/2175#discussion_r374236065
 
 

 ##########
 File path: hw/drivers/crypto/crypto_da1469x/src/crypto_da1469x.c
 ##########
 @@ -0,0 +1,236 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <string.h>
+#include "mcu/cmsis_nvic.h"
 
 Review comment:
   Jumping in here...
   
   This is a pedantic answer.  The original code looks correct to me.  From the 
C spec (C11 draft, 6.10.2, "Source file inclusion") 
(http://www.iso-9899.info/n1570.html):
   > A preprocessing directive of the form
   > ```# include <h-char-sequence> new-line```
   > searches a sequence of implementation-defined places for a header 
identified uniquely by the specified sequence between the < and > delimiters, 
and causes the replacement of that directive by the entire contents of the 
header. How the places are specified or the header identified is 
implementation-defined.
   >
   > A preprocessing directive of the form
   ```# include "q-char-sequence" new-line```
   > causes the replacement of that directive by the entire contents of the 
source file identified by the specified sequence between the " delimiters. The 
named source file is searched for in an implementation-defined manner. If this 
search is not supported, or if the search fails, the directive is reprocessed 
as if it read
   ```# include <h-char-sequence> new-line```
   > with the identical contained sequence (including > characters, if any) 
from the original directive.
   
   In other words, `<>` is used to include headers from the *implementation* 
(compiler, linker, etc.).  `""` is used for everything else.  In practice there 
is not much difference.  I believe gcc searches implementation-specific 
directories first when `<>` is used, but last when `""` is used.

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