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Hodnocené. / 5. Na základě hodnocení zákazníků
VxWorks
BSP Developer’s Guide, 6.0
2
BSP, there are template files available for use in lieu of the reference BSP. However,
a template BSP is generally not as complete as a reference BSP.
During BSP development, you may want to consult the following VxWorks
companion documents in addition to this manual:
■
VxWorks Device Driver Developer’s Guide—This document discusses issues
related to writing and porting device drivers to VxWorks.
■
VxWorks Hardware Considerations Guide— This document discusses issues
related to embedded hardware design, with a focus on VxWorks. It provides
guidelines and suggestions for selecting hardware for a VxWorks-based
project.
1.2 The Board Support Package
A board support package (BSP) is typically composed of C and assembly source
files, header files, a makefile, a “readme” file containing version numbers and
high-level modification history, and a target.ref or target.nr file containing
documentation specific to the BSP.
The purpose of a BSP is to configure the VxWorks kernel for the specific hardware
on your target board. In addition, the BSP provides an easy way to maintain
portability across many different hardware configurations without having to
customize the core OS (VxWorks). This portability is achieved by defining a boot
procedure and a set of routines that are called during the boot process for
configuration, and during normal operation for specific kinds of hardware access.
The BSP allows for a well-defined interface between your target hardware and the
OS. During the boot process, the BSP routines must call core OS routines and
device driver routines to configure a portion of the core OS as well as the device
drivers. The OS and well-written device drivers then make calls to the BSP routines
during system operation in order to make specific hardware requests.
NOTE: In general, this document applies to VxWorks 5.5 users as well as VxWorks
6.x users. Features or requirements that apply to a specific version of VxWorks are
marked where appropriate. VxWorks 5.5 users are strongly encouraged to review
the VxWorks BSP Developer’s Guide, 5.5 for additional information.
- BSP DEVELOPER’S GUIDE 1
- U.S.): (800) 545-WIND 2
- Contents 3
- Contents 5
- Introduction 9
- BSP Developer’s Guide, 6.0 10
- 1.3 BSP Development Process 11
- 1.4 Terminology 12
- Overview of a BSP 13
- 2.2 Boot Sequence 15
- 2.2.1 Sequence Overview 16
- 2 Overview of a BSP 17
- Step 1: Execute romInit( ) 23
- Step 4: Execute usrInit( ) 25
- TCB) from the top 27
- 2.3 Components of a BSP 28
- USRCONFIG = usrConfig.c 29
- 2.3.2 Derived Files 36
- 2.3.4 Required Routines 40
- /* lock interrupts */ 46
- 2.3.5 Required Macros 47
- ROM_TEXT_ADRS. The offset 48
- 2.3.6 Optional Routines 50
- 2.4.1 BSP Debugging Methods 52
- 2.4.3 The Wind River IDE 56
- 2.4.5 Download Path 57
- 2.5 Avoiding Common Problems 61
- Porting a BSP to 63
- Custom Hardware 63
- 3.2.1 Initializing the Board 64
- 3.2.2 Initializing Memory 65
- LED Routines 70
- #undef INCLUDE_WDB_VIO 75
- 3.2.7 Interrupt Controllers 78
- 3.2.8 ISR Guidelines 78
- 3.2.9 DMA 78
- 3.2.11 Serial Drivers 79
- 3.3.2 Projects 81
- 3.3.3 Adding Other Timers 81
- 3.3.4 NVRAM 82
- 3.3.6 Boot ROMs 85
- FUNCPTR * pArg 89
- UINT * pArg 89
- 3.3 Finalizing Your BSP 101
- Generic Driver Introduction 110
- One-Shot Timer Examples 116
- Non-Volatile Memory 117
- Debugging Your BSP 123
- 4 Debugging Your BSP 127
- 4.2.3 Verifying RAM 129
- For example: 133
- 4.3.1 Symbols 134
- 4.3.2 Breakpoints 134
- Common Development Issues 139
- Image Locations 140
- A.3 Cache and MMU 141
- Timing Issues 142
- A.4 Reusing Unportable Code 143
- A.5 Volatile Variables 143
- Documentation Guidelines 145
- B.1 Introduction 146
- B.2 Written Style 146
- Use... Not 147
- B Documentation Guidelines 149
- Acronyms 152
- Board Names 153
- NAME Section 154
- B.4 Sections for target.ref 161
- B.5 Format and Style 163
- Ta b le B -5 Apigen Markup 166
- Component Input Output 170
- Command Syntax 174
- Board Diagrams 174
- B.6 Directives 175
- Directive Name Usage 176
- \IMAGE images/board.jpg 178
- \IMAGE images/switches.gif 178
- (apigen or refgen -mg) 182
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