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

Wednesday, December 9th, 2009 at 12:03 | No comments

Categories: Embedded system

Tags: Linux, USB

Short Content: First, code revision# for has deleted in here include in front, hoped that has the help/*add by lfc*/#include

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 ...

Monday, November 23rd, 2009 at 17:13 | No comments

Categories: Embedded system

Tags: USB, VxWorks

Short Content: 1st, question statement    Universal serial bus (USB) takes one high speed data mode, already very generally applied in the peripheral device and in main engine's correspondence. VxWorks is now the very popular real-time operating system, in correspondence, national defense, industrial control, medical equipment and so on embedded real-time application domain. In many VxWorks systems has the USB equipment, but realizes the material which about the USB actuation has not been related to be possible to refer, has brought the ...

Friday, November 20th, 2009 at 06:45 | No comments

Categories: Embedded system

Tags: driver, HOST, Linux, USB

Short Content: (following discussion based on kernel 2.6.11, ARM9 s3c2410, arm-linux-gcc 3.4.1) ================================================= 2.6 the direct result which usb host does not work on s3c2410 is prompts 110 mistakes: usb 1-1: device descriptor read/64, error -110 Traces the error code, we had a look to be able to find cause this wrong clue. include/asm-generic/errno.h #define EPROTO 71/* Protocol error */ #define EILSEQ 84/* Illegal byte sequence */ #define ETIMEDOUT 110/* ...

Monday, November 9th, 2009 at 16:12 | No comments

Categories: Embedded system

Tags: 2440, HOST, USB

Short Content:        Today tpu puts out together 2440 board debuggings, discovered that will take all sorts of measures freely, USBHOST occasionally will not always have worked. Draws out UCLK through CLKOUT0, examined with the oscilloscope, discovered does not work, UCLK has not stabilized down. Therefore pondered carefully that affects USB to have these places: Exterior crystal oscillator 16.9344Mhz LOCKTIME register's UPLL LOCKTIME UPLLCON CLKSLOW ...

Thursday, October 22nd, 2009 at 13:24 | No comments

Categories: Embedded system

Tags: DSP, USB

Short Content: Abstract: Introduced one kind based on the DSP USB mouth vibration, the noise signal gathering analysis system structure plan, and has carried on the analysis to its various modules, this plan has realized completely in the system programming and the disposition. Introduced in detail in view of the USB module CYPRESS Corporation's EZUSB chip, explained its firmware (Firmware) and the driver frame. Is getting stronger and stronger along with the DSP chip function, the speed is getting quicker and ...

Saturday, July 11th, 2009 at 02:42 | No comments

Categories: DSP

Tags: DSP, inserts pulls out, opens gives off heat, USB

Short Content:     The airplane anti-skid braking controller takes the airplane anti-skid braking system's core part, its design quality immediate influence to airplane's safe launching and the safe landing braking, system performance's quality needs to examine through the test facility. Our country had more than a half century time to controller's research, from the machinery - barometric pressure type to present digital, has made the good progress. But is actually in a blank to the maneuver box test's research, until now still ...

Thursday, July 9th, 2009 at 15:08 | No comments

Categories: DSP

Tags: data transmission, development, DSP, USB

Short Content: Abstract: This article introduced one kind uses TMS320VC5509A bringing the USB module to realize the USB data transmission plan, module's structure and the transmission principle has made the analysis to this DSP the internal USB, how has the detailed introduction (CSL) realized the USB equipment firmware program design using the CCS interior integration's piece level support storehouse, and has given the related partial codes. This plan reduced the system hardware design order of complexity and the debugging difficulty greatly, enhanced ...

Sunday, July 5th, 2009 at 04:28 | No comments

Categories: DSP

Tags: Data acquisition, develops the, DSP, USB

Short Content: Key word: DSP USB feed pump condition monitor 1 introduction    Uses DSP (digital signal processor) to take the controller, but will use USB (universal serial bus) and the superior machine connects will be the data acquisition processing system's one kind of possibility trend of development.1.1 digital signal processor DSP    DSP chip, is also called the digital signal processor, is one kind is suitable specially in carries on the real-time digital signal processing the microprocessor, uses it to be able to satisfy ...

Wednesday, May 27th, 2009 at 02:25 | No comments

Categories: SCM

Tags: C8051F the, main line, surveys, The test, USB

Short Content: 1    Introduction The intelligent survey obtained widespread application [1][2][3] in the various trades and occupations, surveys the data which obtains to be possible through the serial port or after the exterior USB bridge bridge joint after the USB mouth and superior machine exchange data [2] [3][4]. If the monolithic integrated circuit itself integrated the USB communication module, this will reduce the system cost greatly, enhances system's reliability. This system is precisely selects the C8051F34x chip based on this, it is ...