The Valgrind distribution has multiple tools. The most popular is the memory checking tool (called Memcheck) which can detect many common memory errors such as:
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touching memory you shouldn t (eg. overrunning heap block boundaries)
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using values before they have been initialized
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incorrect freeing of memory, such as double-freeing heap blocks
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memory leaks.
關于FPGA流水線設計的論文
This work investigates the use of very deep pipelines for
implementing circuits in FPGAs, where each pipeline
stage is limited to a single FPGA logic element (LE). The
architecture and VHDL design of a parameterized integer
array multiplier is presented and also an IEEE 754
compliant 32-bit floating-point multiplier. We show how to
write VHDL cells that implement such approach, and how
the array multiplier architecture was adapted. Synthesis
and simulation were performed for Altera Apex20KE
devices, although the VHDL code should be portable to
other devices. For this family, a 16 bit integer multiplier
achieves a frequency of 266MHz, while the floating point
unit reaches 235MHz, performing 235 MFLOPS in an
FPGA. Additional cells are inserted to synchronize data,
what imposes significant area penalties. This and other
considerations to apply the technique in real designs are
also addressed.
PIECEWISE_EVAL: evaluates a piecewise function of x
usage: y = PIECEWISE_EVAL(x,breakpoints,funs)
arguments (input)
x - vector or array of points to evaluate though the function
breakpoints - list of n breakpoints, -inf and +inf are implicitly
LINEINTRGAL Line Integral in a 2D Vector Field.
LINEINTRGAL(X,Y,U,V,C) computes the line integral along the lines given in cell array C.
X and Y define the coordinates of a rectangular grid over which
U and V are defined. X and Y must be monotonic and 2D plaid as
% produced by MESHGRID. X, Y, U, and V must all be the same size.
Address book helps you look up your addresses from the system tray.
It is quite useful in that way 慶ause it stays out of the way and is
easily accessible when needed. Double clicking on any URL will start
the default web browser and take you to that URL. Double clicking on
the phone number will dial that number. Every column supports
sorting and can be customized to your needs. Preview will display
the notes associated with each record.
This program can also import Comma Separated Values (*csv) text files
of Outlook Express.
很多嵌入式系統,特別是應用于圖像處理與高速數據采集等場合的嵌入式系統,都需要高速緩存大量的數據。DDR(Double Data Rate,雙數據速率)SDRAM由于其速度快、容量大,而且價格便宜,因此能夠很好地滿足上述場合對大量數據緩存的需求。但DDR SDRAM的接口不能直接與現今的微處理器和DSP的存儲器接口相連,需要在其間插入控制器實現微處理器或DSP對存儲器的控制。
CCS編程環境 使用的是匯編加C的混合編程方法:
The programme of the Correlation Algorithm.
Using INT2 to get the input signal.
Array x, in first step, is the input signal produced by programme,
in next step, is the input signal get from A/D,
the length is 128, 32-bit floating point.
Array y, in first step, is the input signal produced by programme,
in next step, is the input signal get from A/D,
the length is 128, 32-bit floating point.
Array cor is the Correlation result, the length is 255, 32-bit floating point.