From bdb94ac0cac9f4a95033a41abc420cc01c75ffad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A1szl=C3=B3=20Monda?= <laci@monda.hu>
Date: Thu, 15 Jun 2017 23:52:27 +0200
Subject: [PATCH] Create CONTRIBUTING.md

---
 CONTRIBUTING.md | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 36c5c4f..b1a3538 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -10,10 +10,15 @@
 
 ## Naming identifiers
 
-Functions are written with UpperCamelCase and verb is followed by noun.
+Extern functions and variables are written with UpperCamelCase, non-extern functions and variables are written with lowerCamelCase.
+
+Function names are composed of a verb followed by a noun.
 
 ```
-DoThis();
+DoThisExtern();
+doThisNonExtern();
+uint8 ExternVariable;
+uint8 nonExternVariable;
 ```
 
 Whenever a file exposes a group of functions as a consistent API, their function names should be prefixed with the group name, followed by `_`, followed by the individual function names.
@@ -24,12 +29,6 @@ void LedDriver_WriteRegister(uint8_t i2cAddress, uint8_t reg, uint8_t val);
 void LedDriver_SetAllLedsTo(uint8_t val);
 ```
 
-Non-function scoped variables are written with UpperCamelCase.
-
-```
-uint8_t OuterVariable;
-```
-
 Function scoped variables and function parameters are written with lowerCamelCase.
 
 ```