By Anthony J. Massa
Embedded software program improvement with eCos is the 1st entire consultant to development strategies with this versatile, reasonably cheap, royalty-free embedded software program improvement platform. writer Anthony J. Massa covers eCos structure, deploy, configuration, coding, deployment, and the whole eCos improvement platform, together with aid elements. broad code examples and a whole program case learn display each key programming inspiration, together with exceptions, interrupts, digital vectors, threads, synchronization, networking, net connectivity, debug/bootstrap, or even porting eCos to new undefined.
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Detailed information about the CDL can be found in Chapter 11. The configuration options detailed in this section are text names used by the graphical Configuration Tool. At this time, the configuration option and the relationship with its associated CDL name are unimportant. Throughout the book, the CDL names for specific components or options are given as reference. The nesting of configuration options is used to give finer control over the system. 2. The configuration option Scheduler Timeslicing contains the configuration suboption Number of Clock Ticks Between Time Slices.
Finally, we conclude the eCos architecture with Chapter 9, which details the RedBoot ROM Monitor. 1 Overview The HAL isolates architectural-dependent features and presents them in a general form to allow portability of other infrastructure components. Basically, the HAL is a software layer, with generalized Application Programming Interfaces (API), which encapsulates the specific hardware operations needed to complete the desired function. 2 for the PowerPC architecture. 1 ARM architecture implementation of HAL_ENABLE_INTERRUPTS() macro.
2. The HAL allows the application layer to directly access hardware and any architectural features and does not assume it is the only controller of all hardware in the system. General design principles were followed during the architecting of the HAL. First, the entire HAL is implemented in C and assembly language. This allows the HAL to have the widest range of applicability. Second, interfaces to the HAL are implemented in C macros. This allows the most efficient implementation to be used and yet the interface is not affected.