CN104461646A - Data downloader - Google Patents
Data downloader Download PDFInfo
- Publication number
- CN104461646A CN104461646A CN201410794478.6A CN201410794478A CN104461646A CN 104461646 A CN104461646 A CN 104461646A CN 201410794478 A CN201410794478 A CN 201410794478A CN 104461646 A CN104461646 A CN 104461646A
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- usb
- serial port
- circuit
- data
- electric capacity
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Abstract
The invention relates to the field of electronic information transmission, in particular to a data downloader which comprises a USB power supply circuit, a USB-serial port circuit, a USB data input interface and a data output interface. During downloader working, electricity and data are obtained from a PC through the USB data input interface, the electricity obtains voltage needed by the USB-serial port circuit and a microprocessor through the USB power supply circuit, and the data are processed by the USB-serial port circuit for ISP automatic setting. An independent power supply does not need to be provided for the target microprocessor or a controller, ISP automatic setting is achieved, the whole process is easy and convenient to carry out, the efficiency of program testing and installing can be effectively improved, equipment safety is improved, and the problems that when a program is downloaded in the mode through a traditional emulator and a manually-pre-set ISP circuit, an additional power supply needs to provided for the target microprocessor, and safety is not high are solved.
Description
Technical field
The present invention relates to electro-nic message transmissions field, particularly relate to a kind of crawler.
Background technology
Current, be in the product of core based on embedded microprocessor or embedded microcontroller, the download of processor program realized essentially by two kinds of modes: mode 1: using emulator, in conjunction with simulating developer software download; Mode 2: manual enable pre-configured ISP circuit, resetting processor makes it enter ISP downloading mode, then utilizes serial ports to carry out ISP download program, and forbidden energy ISP circuit again after having downloaded, resetting processor makes it enter normal operation mode.
When using emulator to download, controller or microprocessor need extra power supply, use inconvenience.Dedicated emulated device need be equipped with, adds additional cost.Development of Simulation Software environment needs field staff to open program source file when downloading, and core technology may be caused to divulge a secret or be tampered, and security is not high.
Use manually pre-configured ISP circuit, resetting processor makes it enter the ISP downloading mode controller that downloads needs extra power supply, need manually to arrange ISP circuit and resetting processor makes it enter ISP downloading mode, and extra interface dress exchange device need be carried, use inconvenience, cost is high, takes time and effort.
Summary of the invention
Goal of the invention: for the problems referred to above, the object of this invention is to provide a kind of can be that microprocessor or controller be powered and can carry out the crawler of identification automatically to ISP when downloading data.
Technical scheme: a kind of crawler, comprises USB feed circuit, USB turns serial port circuit, usb data input interface, data output interface, and described USB feed circuit comprise wiring one, switch, linear voltage regulator; Described USB turns that serial port circuit comprises wiring two, resistance, USB turn serial port chip, diode, diode, crystal oscillator; The power supply terminal of described usb data input interface is connected with described wiring one, the data receiver terminal that data terminal and the described USB of described usb data input interface turn serial port chip is connected, described USB feed circuit output terminal turns the power input of serial port chip with described USB respectively, the power input of described data output interface is connected, the data-out port that described USB turns serial port chip is connected with the data input pin of described data output interface.
Further, be protection downloader, in USB feed circuit, after switch, be provided with short-circuit protection.
Further, for making the duty of operating personnel's observed data downloader intuitively, described USB feed circuit be parallel with resistance, light emitting diode alter connection circuit.
Further, disturb for preventing outer signals, at power input shunt capacitance one, the electric capacity two of USB feed circuit linear voltage regulator, at power output end shunt capacitance three, the electric capacity four of linear voltage regulator, turn serial port circuit power input at USB and be parallel with electric capacity five, be parallel with electric capacity six, electric capacity seven turning serial port circuit crystal oscillator.
Preferably, the capacitive reactance of described electric capacity one, described electric capacity three is 0.1uF, and the capacitive reactance of described electric capacity two, described electric capacity four is 10uF.
Beneficial effect: compared with prior art, advantage of the present invention is when using crawler of the present invention, without the need to providing independent power supply for target microprocessor or controller, and achieve ISP from arranging, process of haveing suffered is simple and convenient, effectively can improve the efficiency of test and installation procedure, and improve the security performance of equipment.
Accompanying drawing explanation
Accompanying drawing is principle of the invention figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
As shown in drawings, comprise USB feed circuit, USB turn serial port circuit, usb data input interface 11, data output interface 18.The power supply terminal of usb data input interface 11 is connected with wiring 1, the data receiver terminal that data terminal and the USB of usb data input interface 11 turn serial port chip 14 is connected, the output terminal of USB feed circuit turns the power input of serial port chip 14 respectively with USB, the power input of data output interface 18 is connected, and the data-out port that USB turns serial port chip 14 is connected with the data input pin of data output interface 18.
Feed circuit part uses linear voltage regulator 6 as voltage conversion device, and linear voltage regulator 6 inputs and exports and all uses 0.1uF electric capacity 1, electric capacity 37 and 10uF electric capacity 25, the voltage stabilizing of electric capacity 48 parallel filtering, to promote power quality, eliminates ripple interference.Power supply input uses wire jumper as device power supply (DPS) switch 2, and 500mA fuse of connecting is as line protective devices 3, for short-circuit protection, prevents overcurrent damage USB interface.Be parallel with in addition resistance 29, light emitting diode 10 alter connection circuit, arrange LED light instruction USB connection status, when connecting normal, LED will light.
USB turns that serial port circuit comprises wiring 2 12, resistance 1, USB turn serial port chip 14, diode 16, diode 17, crystal oscillator 20.USB turn shunt capacitance 5 15, USB in serial port circuit turn serial communication part use USB turn serial port chip 14.D+ and D-of UD+ and UD-and USB interface that USB turns serial port chip 14 is connected, TXD with RXD is connected with serial line interface RXD and TXD of microprocessor, and RXD is by 4.7k resistance 1 pull-up.RTS and DTR of serial ports, according to its communication logic, can be used for controlling the reset of microprocessor and ISP circuit to carry out ISP operation.For making chip normally work, be also provided with 12M crystal oscillator 20 as clock signal chip, power supply inputs 0.1uF electric capacity 6 19 in parallel, electric capacity 7 21, eliminates interference.
By designing the schematic diagram of this device, produce the PCB of this device.This device is produced in kind after welding corresponding components and parts.Only need PC to connect this device by USB cable during use, and the ISP this device being connected to target device downloads on mouth, ISP can be used on PC to download software and carry out program burn writing.
When carrying out AccessPort, also only need hardware circuit to connect directly to debug corresponding serial ports program.
Claims (7)
1. a crawler, it is characterized in that: comprise USB feed circuit, USB turns serial port circuit, usb data input interface (11), data output interface (18), described USB feed circuit comprise wiring one (1), switch (2), linear voltage regulator (6); Described USB turns that serial port circuit comprises wiring two (12), resistance one (13), USB turn serial port chip (14), diode (16), diode (17), crystal oscillator (20); The power supply terminal of described usb data input interface (11) is connected with described wiring one (1), the data receiver terminal that data terminal and the described USB of described usb data input interface (11) turn serial port chip (14) is connected, the output terminal of described USB feed circuit turns the power input of serial port chip (14) respectively with described USB, the power input of described data output interface (18) is connected, and the data-out port that described USB turns serial port chip (14) is connected with the data input pin of described data output interface (18).
2. a kind of crawler according to claim 1, is characterized in that: in described USB feed circuit, is provided with short-circuit protection (3) after described switch (2).
3. a kind of crawler according to claim 1, is characterized in that: described USB feed circuit be parallel with resistance two (9), light emitting diode (10) alter connection circuit.
4. a kind of crawler according to claim 1 or 2 or 3, is characterized in that: power output end shunt capacitance three (7), the electric capacity four (8) of the power input shunt capacitance one (4) of described linear voltage regulator (3), electric capacity two (5) and/or linear voltage regulator (3).
5. a kind of crawler according to claim 1, is characterized in that: described USB turns serial port circuit power input and is parallel with electric capacity five (15).
6. a kind of crawler according to claim 1 or 2 or 3 or 5, is characterized in that: described USB turns serial port circuit crystal oscillator (20) and is parallel with electric capacity six (19), electric capacity seven (21).
7. a kind of crawler according to claim 4, it is characterized in that: the capacitive reactance of described electric capacity one (4), described electric capacity three (7) is 0.1uF, the capacitive reactance of described electric capacity two (5), described electric capacity four (8) is 10uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410794478.6A CN104461646A (en) | 2014-12-18 | 2014-12-18 | Data downloader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410794478.6A CN104461646A (en) | 2014-12-18 | 2014-12-18 | Data downloader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104461646A true CN104461646A (en) | 2015-03-25 |
Family
ID=52907751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410794478.6A Pending CN104461646A (en) | 2014-12-18 | 2014-12-18 | Data downloader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104461646A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070201502A1 (en) * | 2006-02-28 | 2007-08-30 | Maven Networks, Inc. | Systems and methods for controlling the delivery behavior of downloaded content |
| US20100199081A1 (en) * | 2009-01-30 | 2010-08-05 | Samsung Electronics Co., Ltd. | Apparatus and method for downloading contents using an interior mass storage in a portable terminal |
| CN102156515A (en) * | 2011-04-28 | 2011-08-17 | 华南理工大学 | Embedded developing board having strong expansibility |
| CN203849734U (en) * | 2013-12-31 | 2014-09-24 | 厦门鼎丞电子科技有限公司 | Programming downloader |
-
2014
- 2014-12-18 CN CN201410794478.6A patent/CN104461646A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070201502A1 (en) * | 2006-02-28 | 2007-08-30 | Maven Networks, Inc. | Systems and methods for controlling the delivery behavior of downloaded content |
| US20100199081A1 (en) * | 2009-01-30 | 2010-08-05 | Samsung Electronics Co., Ltd. | Apparatus and method for downloading contents using an interior mass storage in a portable terminal |
| CN102156515A (en) * | 2011-04-28 | 2011-08-17 | 华南理工大学 | Embedded developing board having strong expansibility |
| CN203849734U (en) * | 2013-12-31 | 2014-09-24 | 厦门鼎丞电子科技有限公司 | Programming downloader |
Non-Patent Citations (2)
| Title |
|---|
| 曾洁: "带线性调压器的开关电源芯片MC33998", 《国外电子元器件》 * |
| 黄同 等: "一种基于CH340T的 STC89C52RC编程器设计", 《电子测试》 * |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |