WRITING DEVICE HEADER FILES

http://www.cadfamily.com/a/EDA_PCB/ARM/WRITING-DEVICE-HEADER-FILES_3773.html

Useful documents
There are some useful documents to help you write header files.
•IAR code standards (CppGuide.html)
•IAR header file template (EWARM_HeaderTemplate.doc)
Where to start
A few pointers:
1. Find the relevant and up-to-date device user guide (can usually be downloaded from the chip manufacturer’s web
site).
2. Check if IAR Systems already supports more devices from the same family. You can often re-use parts from other
header files belonging to the same chip family.
What is included in a header file?
A header file can be said to consist of 6 sections:
1.  A header with the following information:
• Which IAR Compiler and Assembler that the header file designed for
• that the header file is used with ARM IAR C/C++ Compiler and Assembler
• IAR Systems copyright information and the header file creation year
• File revision: $ Revision $
2. Protection against multiple inclusions of the same header file