In a preemptive priority based RTOS, priority inversion
problem is among the major sources of deadline
violations. Priority inheritance protocol is one of the
approaches to reduce priority inversion. Unfortunately,
RTOS like uC/OS can’t support priority inheritance
protocol since it does not allow kernel to have multiple
tasks at the same priority. Although it has different ways
to avoid priority inversion such as priority ceiling
protocol, developers still have some difficulties in
programming real time applications with it. In this paper,
we redesign the uC/OS kernel to provide the ability to
support round robin scheduling and implement priority
inheritance semaphore on the modified kernel. As result,
we port new kernel with priority inheritance semaphore to
evaluation board, and evaluate the execution time of each
of the kernel service as well as verify the operations of
our implementation.
The widespread use of embedded systems mandates the development of industrial software design methods, i.e. computer-aided design and engineering of embedded applications using formal models (frameworks) and standardized prefabricated components, much in the same way as in other mature areas of engineering such as mechanical engineering and electronics. These guidelines have been used to develop Component-based Design of Software for Embedded Systems (COMDES). The paper gives an overview of the COMDES framework, followed by a presentation of a generic component types, such as function blocks, activities and function units. The execution of function units is discussed in the context of a newly developed execution model, i.e. timed-multitasking, which has been extended to distributed embedded systems.
The main MIPS processor of SMP8630 comes with a JTAG interface, allowing:
access to caches and data bus (DRAM) with a bandwidth of about 200kbit/s
examining the processor state whatever the execution mode (monice)
connecting to monice using mdi-server and using a gdb client on the processor to step and break
accurately whatever the execution mode
running semi-hosted applications
fl ash write tool
memory testing (MT command)
real-time traces: has not been built in CPU (Config3_TL=0) and only supported by MajicPLUS probes
(maybe built into emulator?)
Fortran has always been the principal language used in the fields of scientific,
numerical, and engineering programming, and a series of revisions to the standard
defining successive versions of the language has progressively enhanced its power
and kept it competitive with several generations of rivals.
Beginning in 1978, the technical committee responsible for the development
of Fortran standards, X3J3 (now called J3), laboured to produce a new, much-
needed modern version of the language, Fortran 90. Its purpose is to "promote
portability, reliability, maintainability, and efficient execution... on a variety of
computing systems". The standard was published in 1991, and work began in
1993 on a minor revision, known informally as Fortran 95. Now this revised
The JavaServer Pages (JSP) Expression Language (EL) is a
simple non-procedural scripting language that can be used
to evaluate dynamic expressions within a JSP page. Each EL
expression evaluates to a single value that is then expressed as
text in the output of the JSP (when used in template text), or
passed as a value to a JSP action.
As such, it is ideal for adding dynamic elements to the HTML
page (or other text output) generated by the execution of a JSP.
nesc language introduction. nesC is an extension to C [2] designed to embody the structuring concepts and execution model of
TinyOS [1]. TinyOS is an event-driven operating system designed for sensor network nodes that
have very limited resources (e.g., 8K bytes of program memory, 512 bytes of RAM). TinyOS has
been reimplemented in nesC. This manual describes v1.1 of nesC, changes from v1.0 are summarised
in Section 3.
STM32F407VET6數(shù)據(jù)手冊Core: ARM 32-bit Cortex?-M4 CPU with FPU,Adaptive real-time accelerator (ARTAccelerator?) allowing 0-wait state executionfrom Flash memory, frequency up to 168 MHz,memory protection unit, 210 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1), and DSPinstructions
