This presentation discusses the need and design of an SDK for firmware development.

1. SDK For Firmware Development Ramesh Prasad ramesh130@gmail.com

2. Outline Introduction Need for SDK Software Architecture Benefits of SDK

3. Introduction Software Development Kit (SDK) is a set of APIs which allow the programmer to develop application for a particular platform SDK simplifies the development, as the low level details are abstracted from the programmer SDK provides APIs to easily access, manage and transact with the hardware

4. Need For SDK Software complexity is increasing while the time to market is shrinking Managing budget and schedule is becoming increasingly difficult Software reuse is the only way to meet these challenges Software reuse needs a methodological approach in embedded world as there is a wide variety of hardware and peripherals

5. Software Architecture - Usage SDK is a static library which can be linked to the application code Compiler/ Linker .lib Application Code Executable

6. Software Architecture - Layering Application API Wrapper Layer Driver Abstraction Layer Device Drivers CMSIS Porting layer/Silicon Vendor Library Layer Hardware Platform

7. Software Architecture – Hardware Platform

8. Software Architecture – SDK Structure The following is the structure of the SDK- 1. Boards Contains the board specific source code, library and project for the SDK project. i. Common : Source and include files common to the different variants of the board. ii. Board_rev: Code specific to the board and revision 2. Docs Contains the documents. 3. inc SDK header files. 4. Libs SDK library. 5. Samples Various sample code for different peripherals. 6. stm32f10x_stdperiph_lib Standard peripheral library provided by ST. 7. Readme.txt This document. 8. change_log.txt Revision and details of the SDK. 9. Test Test routine for the SDK.

10. Pc_comm.h

11. Printer.h

12. RTC.h

13. Smart_card.h

14. SPI_Flash.h

15. System_init.h

16. Timer.h

18. Software Architecture – GSM Application API Wrapper Layer Driver Abstraction Layer Device Driver Device Driver Device Driver GSM Module 1 GSM Module 2 GSM Module 3

19. Software Architecture – utils.h #ifndef __UTILS_H #define __UTILS_H #include "platform.h" //32 bit utility functions #ifdef __UTILS_C #define UTILS_SCOPE #else #define UTILS_SCOPE extern #endif UTILS_SCOPE void Delay(vu32 nCount); UTILS_SCOPE void Clrbuf(u8 *Str, u32 Len); UTILS_SCOPE float AtoF(s8 *str); UTILS_SCOPE u32 AtoI( u8 *str); UTILS_SCOPE void ItoA( const unsigned long value, unsigned char *str); UTILS_SCOPE void Rev_String(u8 *str); UTILS_SCOPE u16 Strlen( const u8 *str); UTILS_SCOPE u8 Rev_ByteBits(u8 byte); UTILS_SCOPE u32 Rev_WordBits(u32 byte); UTILS_SCOPE u16 Rev_HalfWordBits(u16 byte); UTILS_SCOPE u8 *strset(u8 *s, u16 ch); UTILS_SCOPE u8 *Strnset(u8 *str, u16 ch, u16 n); UTILS_SCOPE u8 *Strcpy(u8 *dest, const u8 *src); UTILS_SCOPE u8 *Strcat(u8 *dest, const u8 *src); UTILS_SCOPE u8 *Strncpy(u8 *dest, const u8 *src, u16 maxlen); UTILS_SCOPE s8 Strcmp(const u8 *s1, const u8 *s2); UTILS_SCOPE s8 Strncmp( const u8 *str1, const u8 *str2, u16 nob); #endif

20. Benefits of SDK Code reusability Small learning curve for application developer Easy migration to a different processor and/or peripheral Code security Abstraction of low level details Ease of development for third party Ease of upgrade

21. Thank You