CN201508547U

CN201508547U - Handheld USB programming device

Info

Publication number: CN201508547U
Application number: CN2009201720983U
Authority: CN
Inventors: 黄岭; 冯勇; 石险峰; 翁斌; 李鹏
Original assignee: YI'AI FIRE-FIGHTING ELECTRONICS Co Ltd BENGBU
Current assignee: YI'AI FIRE-FIGHTING ELECTRONICS Co Ltd BENGBU
Priority date: 2009-05-18
Filing date: 2009-05-18
Publication date: 2010-06-16
Anticipated expiration: 2019-05-18

Abstract

The utility model provides a handheld USB programming device, which comprises a single chip microcomputer, a USB general line signal transmit and receive circuit for leading the single chip microcomputer to exchange data with outside, a storage unit for exchanging data with the single chip microcomputer, a data storage unit which is used for storing programs to be programmed and is used as a U disc, a programming interface circuit for being connected with the single chip microcomputer, a programming real-time display circuit for displaying current programming schedules, and a code dialing circuit which is connected with the single chip microcomputer, wherein the programming interface circuit is used for connecting programming components, the programming real-time display circuit is connected with the single chip microcomputer, and the code dialing circuit is used for choosing programming or USB flash disk modes. The handheld USB programming device has the advantages of convenient carrying, simple operation, parallel and serial programming and high capacity storage function.

Description

Hand-held USB programmable device

Technical field

The utility model relates to a kind of serial programming, multiple programming device that is used for microcontroller embedded system, and this device also possesses the USB memory function, specifically, relates to a kind of hand-held USB programmable device.

Background technology

For microcontroller embedded system, product in use discovery feature, performance does not meet the demands, or need increase function because of customer requirements the time, generally needs the scene to carry out software upgrading.At present the method for upgrading has three kinds: first method is to carry PC or equipment such as notebook computer, programmable device go the user to use the scene, takes off the storer of embedded system, is inserted in the socket of programmable device on-the-spot burning, update software; Second method is with PC or the notebook computer serial line interface by embedded system it to be carried out the program downloads operation; The third method is that the software after will change with PC or notebook computer, programmable device earlier is burnt in the storer, carries this memory chip then and goes the user to use the scene, changes and has chip now.

The problem that above method exists is, must be equipped with PC or equipment such as notebook computer, programmable device during on-the-spot burn recording software, carries inconvenience, and the layman is not easy to operate; General enterprise can not accomplish to allow each maintainer all be equipped with notebook computer and programmable device; When the chip that it is good that the maintainer carries burning went on-the-spot the replacing, promptness was difficult to guarantee, causes circuit to damage when changing chip easily.

Summary of the invention

Fundamental purpose of the present utility model provides and a kind ofly is convenient for carrying, simple to operate, can walk abreast, serial programming, and hand-held USB programmable device with high capacity memory function.

For achieving the above object, the hand-held USB programmable device that the utility model provides comprises single-chip microcomputer, is used to make single-chip microcomputer and the extraneous usb bus signal transmitting and receiving circuit that carries out exchanges data; Carry out the storer of exchanges data with single-chip microcomputer, be used to store the program of the programming of wanting and as the data-carrier store of USB flash disk; The DLL (dynamic link library) circuit that is connected with single-chip microcomputer is used to connect the programmable device device; The real-time display circuit of the programming that is connected with single-chip microcomputer is used to show current programming progress; The dial-up circuit that is connected with single-chip microcomputer is used for selecting programming or USB flash disk pattern.

Scheme is that the DLL (dynamic link library) circuit comprises 32 pin IC sockets, address latch chip and little row connector of four-core more specifically.The real-time circuit of programming comprises latch devices D4, numeric display device DS1, DS2, optical indicator spare and current-limiting protection circuit.The dial-up circuit comprises four groups of toggle switchs.Usb bus signal transmitting and receiving circuit comprises usb bus interface chip and USB interface.

The advantage of the above technical scheme of the utility model will provide in the explanation to embodiment one by one.

Description of drawings

Fig. 1 is a theory diagram of the present utility model;

Fig. 2 is a programming flow diagram of the present utility model;

Fig. 3, Fig. 4, Fig. 5 are the electrical schematic diagrams of an embodiment of the utility model.

The utility model is described in further detail below in conjunction with embodiment.

Embodiment

Referring to Fig. 1, single-chip microcomputer carries out message exchange by the usb bus signal transmitting and receiving circuit and the external world, programme by the DLL (dynamic link library) circuit, storer is used to store the program that need fire etc., the real-time display circuit of programming is used to provide the programming progress, and the dial-up circuit is used for changing between programmable device and USB flash disk function.

Referring to Fig. 2, Fig. 3-Fig. 5, Fig. 3-Fig. 5 is the circuit diagram of an embodiment of the utility model, because of the breadth problem, for the purpose of expressing clearly, this circuit diagram is divided into three parts, and the connection of three parts realizes by A-A, B-B among Fig. 3-Fig. 5, C-C, D-D, E-E.USB transceiving chip D8 in the usb bus transmission circuit adopts CH375B, and be responsible for single-chip microcomputer and outside and carry out exchanges data, peripheral components capacitor C 12, C13 and crystal G2 constitute the outer clock circuit of CH375B.Capacitor C 14 is in order to allow CH375B more reliablely and stablely reset.When CH375B adopted the 5V power supply, capacitor C 15 and C16 played the decoupling effect.Capacitor C 19 is the filtrations to the power supply spike, with the work of guaranteeing that internal circuit is more reliable, stable.CH375B can also provide a reset signal, is used to the single-chip microcomputer that resets, thereby has economized the peripheral reset circuit of single-chip microcomputer.

Memory circuit is by serial storage D6 and current-limiting resistance R10-R12, and R16-R18 forms, because serial storage D6 operating voltage is 3.3V, and the operating voltage of single-chip microcomputer D1 is 5V, damages in order to prevent storer D6, adopts resistance to protect.Storer D6 is mainly used in the program of the storage programming of wanting.

Single-chip microcomputer D1 and peripheral circuit extend out the RAM circuit by clock circuit, and the enumeration succeeds indicating circuit is formed.Single-chip microcomputer D1 adopts SST89E516, internal processes space 64K, the agreement that can store multiple single-chip microcomputer and peripheral programming device.Extend out RAM and be used for being provided with buffer zone.Because writing of storer is could write after will wiping earlier again, and wipe be a sector, a sector wipe, so single-chip microcomputer D1 wants earlier the inner data that do not need to change to be preserved earlier, wipes, and then data that will write and original data are recovered.So the task amount of single-chip microcomputer D1 is very heavy, and bus transfer speed is very fast, if there are not enough buffer zones, has little time to respond the data of usb bus at all, has expanded the RAM of 32K here.The enumeration succeeds indicating circuit is made up of light emitting diode V1 and resistance R 20, when realizing the USB flash disk function, after the enumeration succeeds, lights light emitting diode V1, and low level drives.

Programming progress indicating circuit is by latch devices D4, numeric display device DS1, and DS2, optical indicator spare, current-limiting protection circuit R3-R9 form.Latch devices D4 is used to latch numeral to display, and numeric display device DS1, DS2 adopt eight segmentation charactrons, is used to show current programming progress, and optical indicator spare adopts light emitting diode, indicates current running status.Triode V2-V4 is used for the driving to light emitting diode and charactron.

The DLL (dynamic link library) circuit is made up of 32 pin IC sockets, address latch chip D3, little row connector of four-core.When carrying out serial programming, use little row of four-core to connect the programmable device device; When carrying out the parallel port programming, the device of programming can be inserted the IC socket.

The dial-up circuit is made up of four groups of toggle switchs, is used for selecting program folder or the USB flash disk pattern that will programme.When pushing the USB flash disk function, be connected on PC or the notebook computer by usb bus, use as USB flash disk.Process flow diagram receives also outer reason outside and enumerates order as shown in Figure 2, returns corresponding data on request, after successfully enumerating, lights pilot lamp.Receive CBW order then, comprise in the CBW order read-write of storage chip such as is wiped at various command.If selection programming mode, toggle switch are used to select chip type, enter the programming operation state after powering on, if do not enter or be not ready for, the indicator light cycle flicker is during starting program, charactron shows the programming progress, and programming is lighted successfully pilot lamp after finishing verification correctly.

Claims

1. hand-held USB programmable device comprises

Single-chip microcomputer is used to make single-chip microcomputer and the extraneous usb bus signal transmitting and receiving circuit that carries out exchanges data;

Carry out the storer of exchanges data with single-chip microcomputer, be used to store the program of the programming of wanting and as the data-carrier store of USB flash disk;

It is characterized in that:

The DLL (dynamic link library) circuit that is connected with single-chip microcomputer is used to connect the programmable device device;

The real-time display circuit of the programming that is connected with single-chip microcomputer is used to show current programming progress;

The dial-up circuit that is connected with single-chip microcomputer is used for selecting programming or USB flash disk pattern.

2. hand-held USB programmable device according to claim 1 is characterized in that:

Described DLL (dynamic link library) circuit comprises 32 pin IC sockets, address latch chip and little row connector of four-core.

3. hand-held USB programmable device according to claim 1 is characterized in that:

The real-time circuit of described programming comprise latch devices (D4), numeric display device (DS1, DS2), optical indicator spare and current-limiting protection circuit.

4. hand-held USB programmable device according to claim 1 is characterized in that:

Described dial-up circuit comprises four groups of toggle switchs.

5. according to each described hand-held USB programmable device of claim 1 to 4, it is characterized in that:

Described usb bus signal transmitting and receiving circuit comprises usb bus interface chip and USB interface.