Init: setup unity and code confg file for builtin library

.gitignore

@@ -2,5 +2,13 @@
 .vscode
 pkg_build
 build
-.clang-format
-**/__pycache__/
+**/__pycache__/
+
+# Code-check reports
+clang-tidy-report.txt
+
+scan-build-reports/
+
+cppcheck_reports/
+cppcheck.checkers
+err.xml

IFX_CONTRIBUTING.md

@@ -0,0 +1,26 @@
+# Develop Environment
+
+## Develop on Windows
+Clone the repository in arduino folder:
+- Open Arduino and install any Infineon XMC library (e.g. 2.2.0)
+- Open the library location in Arduino program folder
+`C:\Users\"USERNAME"\AppData\Local\Arduino15\packages\Infineon\hardware\xmc`
+- Open git bash, type command:
+`git clone "HTTP_SSH_REPOSITORY" "LIBRARY_VERSION (e.g. 2.2.0)"`
+
+This is a workaround for current local compilation/testing.
+
+## Develop on WSL
+To be able to use some tools (make, clang, gcc...) easier on Linux, WSL is needed.
+Since now we still compile the code with arduino-cli.exe on windows, in order to useLinux commands/ build tools, a symbolic link is created to eunsure the changes are immediately reflected in the other. 
+In WSL, you can create a symbolic link pointing to your windows project folder:
+
+`ln -s /mnt/c/Users/<YourUserName>/AppData/Local/Arduino15/packages/Infineon/hardware/xmc /home/<you-wsl-user>/project`
+
+# Code checks
+Refer to libraries\CAN\Makefile.codecheck
+
+# Example and Unity tests
+Refer to libraries\CAN\Makefile.test
+
+XMC4700 Receiver has some issue. 

config/clang-format/.clang-format

@@ -0,0 +1,26 @@
+---
+# We'll use defaults from the LLVM style, but with 4 columns indentation.
+#BasedOnStyle: GNU
+BasedOnStyle: LLVM
+#BasedOnStyle:  Google
+#BasedOnStyle:  Mozilla
+#BasedOnStyle:  Chromium
+IndentWidth: 4
+---
+Language:        Cpp
+# BasedOnStyle:  Google
+AccessModifierOffset: -4
+Standard:        c++17
+TabWidth:        2
+UseTab:          Never
+ColumnLimit:     100
+AlignAfterOpenBracket: Align
+BinPackParameters: false
+AlignEscapedNewlines: Left
+AlwaysBreakTemplateDeclarations: Yes
+PackConstructorInitializers: Never
+BreakConstructorInitializersBeforeComma: false
+IndentPPDirectives: BeforeHash
+SortIncludes:    Never
+SeparateDefinitionBlocks: Always
+...

config/clang-tidy/.clang-tidy

@@ -0,0 +1,54 @@
+Checks: 'cppcoreguidelines-*,
+performance-*,
+modernize-*,
+google-*,
+misc-*
+cert-*,
+readability-*,
+clang-analyzer-*,
+-performance-unnecessary-value-param,
+-modernize-use-trailing-return-type,
+-google-runtime-references,
+-misc-non-private-member-variables-in-classes,
+-readability-braces-around-statements,
+-google-readability-braces-around-statements,
+-cppcoreguidelines-avoid-magic-numbers,
+-readability-magic-numbers,
+-readability-magic-numbers,
+-cppcoreguidelines-pro-type-vararg,
+-cppcoreguidelines-pro-bounds-pointer-arithmetic,
+-cppcoreguidelines-avoid-c-arrays,
+-modernize-avoid-c-arrays,
+-cppcoreguidelines-pro-bounds-array-to-pointer-decay,
+-readability-named-parameter,
+-cert-env33-c
+'
+
+
+WarningsAsErrors: ''
+HeaderFilterRegex: '.*'
+#HeaderFilterRegex: '*spdlog/[^f].*'
+#AnalyzeTemporaryDtors: false
+FormatStyle:     none
+
+CheckOptions:    
+  - key:             google-readability-braces-around-statements.ShortStatementLines
+    value:           '1'
+  - key:             google-readability-function-size.StatementThreshold
+    value:           '800'
+  - key:             google-readability-namespace-comments.ShortNamespaceLines
+    value:           '10'
+  - key:             google-readability-namespace-comments.SpacesBeforeComments
+    value:           '2'
+  - key:             modernize-loop-convert.MaxCopySize
+    value:           '16'
+  - key:             modernize-loop-convert.MinConfidence
+    value:           reasonable
+  - key:             modernize-loop-convert.NamingStyle
+    value:           CamelCase
+  - key:             modernize-pass-by-value.IncludeStyle
+    value:           llvm
+  - key:             modernize-replace-auto-ptr.IncludeStyle
+    value:           llvm
+  - key:             modernize-use-nullptr.NullMacros
+    value:           'NULL'

config/cppcheck/misra.json

@@ -0,0 +1,4 @@
+{
+    "script": "misra.py",
+    "args": [ "--rule-texts=config/cppcheck/misra.txt" ]
+}