51 Research and Design, Electronic Engineers website - Embedded Systems, MCU, DSP, EDA, Test and Measurement, Components, Communications, Power, Microelectronics, Semiconductors

Thursday, December 10th, 2009 at 14:34 | No comments

Categories: Embedded system

Tags: ARM, interruption, ucos

Short Content:     uCOS II is a sound code public, may transplant, the solidifiable, to be possible to tailor and the grab-like real-time multi-duty operating system, its majority of sound codes are compile with ANSI C, with processor hardware related part use assembly language compilation. The total quantity the approximately 200 line of assembly language part is compressed the threshold, is advantageous transplants to any kind of other CPU on.    uCOS II most may support 56 duties, its essence to take ...

Wednesday, December 9th, 2009 at 06:43 | No comments

Categories: Embedded system

Tags: ARM, qtopia

Short Content: Foreword:Speaks the truth, before has only done 51, what moreover with is the assembly, how C does not have to use. Recently only then had the opportunity to contact linux, said was also the backward member. North is lucky in the principle forum the fellow chivalrous people's help, but also calculated that smooth transplanted qtopia on the ARM development board. Presently reorganizes as follows, offers a few ordinary introductory remarks so that others may offer their valuable ideas, to ...

Tuesday, December 8th, 2009 at 06:48 | No comments

Categories: Embedded system

Tags: ARM, ucos

Short Content:     uCOS-II is a public sound code grab type, the multi-duty real-time operating system, because it has the source, timeliness to be strong, the code compact, stable reliable and so on characteristics obtained in each kind of system have widely applied .uCOS-II also already to realize the .ARM processor on the ARM processor's transplant to add the uCOS-II operating system's embedded system commonly used in the industry real-time control, to carried out the efficiency is specially the timely request ...

Monday, December 7th, 2009 at 16:07 | No comments

Categories: Embedded system

Tags: ARM, qtopia

Short Content: First, is related the tool as well as the software package: Cross-compiler Toolchains         Provides the arm cross compiling tool e2fsprogs-1.35.tar.gz                   Uses in translating produces the libuuid storehouse tmake-1.11.tar.gz                         Produces makefile tslib.tar .bz2                                   Touchscreen storehouse qt-embedded-2.3.7.tar.gz              Qt/Embedded qt-x11-2.3.2.tar.gz                         Qt/X11, provides uic, qvfb (not to need) qtopia-free-1.7.0.tar.gz                 Qtopia Preserve the /qte_arm/ table of ...

Monday, December 7th, 2009 at 10:19 | No comments

Categories: Embedded system

Tags: align, ARM

Short Content: Will see frequently in the arm-linux assembly will have the following instruction:.align nIts meaning is causes the following code to aline according to certain rule, .align the n instruction alines the value to have two kind of plans, n or 2^n, each kind of platform initial assembler is not generally gas, uses the plan 1 or 2 many, the gas goal is the substitution original assembler, must maintain with inevitably the original assembler's compatibility, therefore how in gas to ...

Monday, December 7th, 2009 at 08:28 | No comments

Categories: Embedded system

Tags: ARM, CS89712, DSP

Short Content: 1 introduction    At present the embedded system widely has been applied high-end equipment domains and so on electronic products domain and wireless communication, network service. 32 ARM embedded processors have the high performance, the low power loss characteristic, the DSP chip, because the function is formidable, in addition the connection is convenient, the software available resource is rich, the programming is convenient, the stability is good, the precision higher merit, the application is also getting more and more widespread. ...

Monday, December 7th, 2009 at 00:36 | No comments

Categories: Embedded system

Tags: ARM, USB

Short Content:     The commonly used main engine and the embedded peripheral device's high-speed service connection has the LPT parallel mouth, USB, 1394 and connections and so on 10/100M ethernet. RS232 does not suit the high speed data transmission, 1394 connections need the special adapter connection cost to be excessively high, generally little uses, the USB connection widely uses in the high, middle and low friction speed equipment and the main engine correspondence, the USB2.0 maximum speed may reach 480Mb/s, may ...

Sunday, December 6th, 2009 at 10:58 | No comments

Categories: Embedded system

Tags: ARM, FPGA, LED

Short Content:     At present, the display monitor mainly has two kinds according to the data transmission mode: One kind is uses with the computer demonstration identical content real-time video frequency screen; Another kind for through means of communication and so on USB, ethernet issues the demonstration content display monitor's independent video frequency source display monitor, if selects the wireless communication method, but may also momentarily renew the demonstration content, the flexibility is high. In addition, provides the video frequency source ...

Thursday, December 3rd, 2009 at 22:44 | No comments

Categories: Embedded system

Tags: ARM, interrupts, Linux

Short Content:     In the ARM architecture, the replacement, the interrupt, the fast interrupt and so on regards as `to be unusual ', when these `is unusual ' occurs, CPU will arrive at the fast address place to look for the instruction, they correspond the address is as follows: Address ...

Thursday, December 3rd, 2009 at 03:18 | No comments

Categories: Embedded system

Tags: ARM, image, surveillance

Short Content:     To the image supervisory system, the user proposes such function demand frequently: The hope can monitor is away from far object these objects to have the possibility to distribute in the suburb, the remote mountain, wilderness or other unattended situations; Moreover, hoped that can gain the quite clear monitoring image, but is not high to image transmission's timely request is very obvious, adds the image gathering card with traditional PC machine the way to be very difficult to ...