Reusable Firmware Development: A Practical Approach to APIs, Hals and Drivers (Paperback)

Chapter 1 Concepts for Developing Portable Firmware .............3 Why Code Reuse Matters.................................................................................3 Portable Firmware ............................................................................................5 Modularity ......................................................................................................... 11 Module Coupling and Cohesion.................................................................. 12 Following A Standard .................................................................................... 14 Portability Issues in C - Data Types ......................................................... 15 Portability Issues in C - Structures and Unions................................... 17 Portability Issues in C - Bit Fields............................................................. 18 Portability Issues in C - Preprocessor Directives ............................... 19 Hardware Abstraction Layers (HAL) ....................................................... 21 Application Programming Interfaces (APIs) ........................................ 28 Project Organization...................................................................................... 28 Getting Started Writing Portable Firmware ......................................... 29 Going Further ................................................................................................... 32 Chapter 2 API and HAL Fundamentals.............................................37 The Wonderful World of HALs ................................................................... 37 APIs versus HALs............................................................................................. 38 The API and HAL Landscape ....................................................................... 40 The Good, Bad and Ugly................................................................................ 42 Potential Issues and the Boogeyman....................................................... 42 Characteristics Every HAL should Exhibit ............................................. 46 To Build or Not to Build................................................................................ 56 A First Look at a HAL...................................................................................... 58 The API Scope ................................................................................................... 59 API Characteristics to look for ................................................................... 60 Designing your own APIs ............................................................................. 65 A First Look at an API .................................................................................... 65 Going Further ................................................................................................... 67 Confidential - ⓒ2016 Jacob Beningo, All Rights Reserved, DRAFT A08 Chapter 3 Device Driver Fundamentals in C..................................73 Understanding the Memory Map...............................................................73 Identifying Driver Interfaces.......................................................................77 Design by Contract..........................................................................................80 Assertion Fundamentals...............................................................................83 Device Driver Models .....................................................................................85 Polled versus Interrupt Driven Drivers ..................................................87 Deciphering the volatile, const and static keywords .........................93 Driver Module Definition..............................................................................93 Naming Convention Recommendations..................................................95 Object Oriented Programming in C........