CN201113878Y

CN201113878Y - Driver

Info

Publication number: CN201113878Y
Application number: CNU2007201215951U
Authority: CN
Inventors: 何跃军; 杨文利
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-23
Filing date: 2007-07-23
Publication date: 2008-09-10
Anticipated expiration: 2017-07-23

Abstract

The utility model is applicable to the driving control field and provides a driver which comprises a motor driving circuit unit. The driver also comprises: an interface circuit conversion unit which is connected with an upper computer and receives and processes control command parameters input by the upper computer through a USB; an FPGA control circuit unit which is respectively connected with the interface circuit conversion unit and the motor driving circuit unit, processes the control command parameters received by the interface circuit conversion unit, and uses a control signal obtained after the processing to make a driving control to a motor through the motor driving circuit unit. In the utility model, the driver adopts the FPGA based on the USB as the control core, so the driver has the characteristics of plug and play, and simple and easy installation and so on; at the same time, the driver improves the response speed, the reliability and the flexibility of the prior stepping motor system, so the driver has broad application prospect.

Description

A kind of driver

Technical field

The utility model belongs to the drive controlling field, relates in particular to a kind of driver.

Background technology

In the prior art, motor driver and control system be connected or data interaction realizes by 232 interfaces, at USB (Universal Serial Bus, USB) under the situation that interface is popularized, the interface of motor driver is converted to USB interface from 232 is just becoming a kind of trend, and the digital-to-analog circuit form is generally adopted in stepper motor driver control at present in addition, or the employing Single-chip Controlling, the response speed of its control, stability and reliability etc. can not satisfy user's needs gradually.

The utility model content

The purpose of this utility model is to provide a kind of driver, is intended to solve in the prior art, and driver interface is connected the mutual complicated problems that realizes with computer data signal.

The utility model is achieved in that a kind of driver, comprises the motor-drive circuit unit, and described driver also comprises:

The interface circuit converting unit is connected with host computer, receives the control command parameter of handling the host computer input by USB; And

The FPGA control circuit unit, be connected with described interface circuit converting unit, motor-drive circuit unit respectively, the described control command parameter that described interface circuit converting unit receives is handled, and with the control signal that obtains after the described processing, through described motor-drive circuit unit, motor is carried out drive controlling.

In the utility model, driver adopts FPGA based on USB as the control core, have promptly pull out promptly with and characteristics such as simple and easy are installed, the while has been improved existing stepping motor system response speed greatly, reliability and flexibility, thereby have development prospect widely.

Description of drawings

Fig. 1 is the structure chart of the driver that provides of the utility model;

Fig. 2 is the structure chart of the CP2101 that provides of the utility model.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

In the utility model, adopt field programmable gate array (the Field ProgrammableGate Array of USB interface, FPGA) stepper motor driver, make driver promptly pull out promptly with and install simple and easy, and FPGA freely programmes, speed is fast, has improved the flexibility of actuating speed, reliability and the control of driver.

Fig. 1 shows the structure of the stepper motor driver that the utility model provides, for convenience of explanation, only show the part relevant with the utility model among the figure, this driver receives and handles the control command parameter by the host computer input, and utilizes the parameter control motor after handling to rotate.

This driver comprises interface circuit converting unit, FPGA control circuit unit and motor-drive circuit unit, this interface circuit converting unit, be connected with host computer, receive the control command parameter of handling by the host computer input by USB, wherein this interface circuit processing unit is converted to 232 mouthfuls of data that can receive with the data processing that the USB mouth receives, and promptly above-mentioned control command parameter is carried out data type conversion; The FPGA control circuit unit, be connected with above-mentioned interface circuit converting unit, motor-drive circuit unit respectively, the interface circuit converting unit receives the control command parameter of handling and handles, and the parameter after the described processing sent to described motor-drive circuit unit, carry out motor-driven control.Certainly, this driver also comprises an optical coupling isolation circuit unit, indicator light and charactron, wherein there are 3 digital light-coupled isolation input ports and 1 digital light-coupled isolation delivery outlet in the optical coupling isolation circuit unit, be used for driver and external equipment and carry out data interaction, wherein, this external equipment is external memory device or control appliance; 6 status indicator lamps are respectively applied for indicates stepping motor forward and backward, USB reception, USB transmission, system alarm, motor to get electric indication etc.; 4 figure place sign indicating number display tubes are display driver internal pulses cumulative number then, is convenient to on-site supervision and debugging.

The FPGA control circuit unit comprises receiver module, decoding module, pulse regneration module, sinusoidal wave module, adjusting module, pulse counter module, internal state display module, group of four figures display module and the sending module of taking place, wherein:

Receiver module is connected with the interface circuit converting unit, and receiving interface circuit conversion unit receives the control command parameter of handling;

Decoding module is connected with receiver module, and the control command parameter that receives is deciphered processing;

The pulse regneration module is connected with above-mentioned decoding module, and this decoding module is deciphered the pulse number information that obtains after the processing, is converted to the forward and backward two pulse signals;

The sinusoidal wave module that takes place is connected with above-mentioned pulse regneration module, and above-mentioned two pulse signals is controlled, and generates the two-way sine wave signal that differs 90 degree;

The amplitude modulation module, be connected with above-mentioned sinusoidal wave generation module, motor-drive circuit unit respectively, according to the amplitude amount information that obtains after the above-mentioned decoding module decoding, the two-way sine wave signal that offset of sinusoidal ripple generation module produces carries out amplitude modulation, obtain the sine wave that two-way differs 90 degree, for stepper motor driving circuit provides input signal;

Pulse counter module is counted the umber of pulse that the pulse regneration module in the FPGA control circuit unit produces;

Group of four figures display module is connected with charactron, pulse counter module, control group of four figures pipe, and the pulse number above-mentioned pulse counter module record shows on charactron;

The internal state display module is connected with indicator light, is used to control indicator light, gets electrical information with indication stepping motor forward and backward, USB reception, USB transmission, system alarm and motor;

Sending module is connected with optical coupling isolation circuit unit, interface circuit converting unit, and the interaction data of external equipment is fed back to host computer through the interface circuit converting unit.

In the utility model; the various states signal of stepping motor; for example stepping motor get electricly enable, just change, counter-rotating, driver receive that the usb signal feedback is replied, driver overcurrent protection and extraneous input signal feedback signal etc.; feed back to host computer by the interface conversion circuit unit; and on corresponding apparatus, report to the police and show that for example this feedback information can be indicated accordingly on indicator light.

In the utility model, driver can carry out data interaction by general optical coupling isolation circuit unit and external equipment.

Three outside general digital input signal In0, In1, In2 (not shown) through the optical coupling isolation circuit unit, are input to the inside of FPGA control circuit unit, handle for FPGA.The decoding module of FPGA control circuit unit according to accepting the information that module is sent, sends control signal, through electric coupling buffer circuit unit, the information that host computer sends, transmits to the external world.

In the utility model, above-mentioned host computer can be personal computer, can certainly be other external equipment with input function.Driver can pass through computer software; startup to stepping motor; brake and reset and control; and to controlling with the operation step number running time of stepping motor; simultaneously to the various feedback signals of stepping motor; get as stepping motor electricly enable, just change, counter-rotating, driver receive that the usb signal feedback is replied, driver overcurrent protection and extraneous input signal feedback signal etc. show and report to the police; adopt serial asynchronous communication between personal computer and the stepping motor; Control Software is based on the solution of personal computer, adopts VB6.0 to write.Carry out the setting of control command parameter by personal computer, can adjust accurately flexibly to the commentaries on classics width of cloth of stepping motor.

In the utility model, above-mentioned interface circuit converting unit can adopt USB-UART bridger CP2101 chip.

Fig. 2 shows internal structure and the outside connecting circuit of the CP2101 that the utility model provides, for convenience of explanation, the part relevant with the utility model only is shown.

This CP2101 is built-in with the usb protocol with usb communication, can the USB mouth of PC be invented com port by driver, to reach the purpose of expansion.The device driver of virtual com port (VCP) allows the device based on CP2101, is independent of any existing hardware with the form of PC application software as the com port of an increase.Com port makes the application software that operates on the PC visit device based on CP2101 in the mode of visiting a standard hardware com port, transfer of data between PC and CP2101 is finished by USB, and therefore need not to revise existing software and hardware just can be by USB to the device transmission data based on CP2101.

This CP2101 comprises a USB connector, USB transceiver, USB function control device, voltage calibrator and asynchronous serial data bus (UART), wherein:

USB connector is connected with host computer, is the passage of the data interaction of CP2101, FPGA control circuit unit and host computer;

The USB transceiver is connected with USB connector, is used for receiving or sending command parameter;

The USB function control device is connected with the USB transceiver, is used for the transmission of control data parameter;

Voltage calibrator is connected with USB connector, is used to realize the voltage transitions of CP2101 inside;

UART is connected with USB function control device, FPGA control circuit unit respectively, and UART is connected with FPGA through light-coupled isolation by pin TXD, RXD and DTR (not shown), is used to carry out the conversion of data format and the control of data transmission bauds.

It is mutual that this CP2101 and host computer carry out transfer of data by USB, and the UART of CP2101 handles all data parameters that receive via USB.

In the utility model, driver adopts FPGA based on USB as the control core, thus have promptly pull out promptly with and characteristics such as simple and easy are installed, improved existing stepping motor system response speed simultaneously, reliability and flexibility, thereby be with a wide range of applications.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims

1. a driver comprises the motor-drive circuit unit, it is characterized in that, described driver also comprises:

2. driver as claimed in claim 1 is characterized in that, described host computer is a personal computer.

3. driver as claimed in claim 1 is characterized in that, described interface conversion circuit unit adopts USB-UART bridgt circuit CP2101.

4. driver as claimed in claim 1 is characterized in that, described FPGA control circuit unit specifically comprises:

Receiver module is connected with described interface circuit converting unit, receives described interface circuit converting unit and receives the control command parameter of handling;

Decoding module is connected with described receiver module, and the control command parameter that receives is deciphered processing;

The pulse regneration module is connected with described decoding module, and described decoding module is deciphered the pulse number information that obtains after the processing, is converted to the forward and backward two pulse signals;

The sinusoidal wave module that takes place is connected with described pulse regneration module, and described two pulse signals is handled, and generates the two-way sine wave signal that differs 90 degree; And

The amplitude modulation module, be connected with described sinusoidal wave generation module, motor-drive circuit unit respectively, the two-way sine wave signal that offset of sinusoidal ripple generation module produces carries out amplitude modulation, obtains the sine wave that two-way differs 90 degree, for the stepper motor driving circuit unit provides input signal.

5. driver as claimed in claim 1 is characterized in that, described driver also comprises:

The optical coupling isolation circuit unit is connected with described FPGA control circuit unit, carries out data interaction with external equipment;

Indicator light is connected with described FPGA control circuit unit, is used to indicate stepping motor forward and backward, USB reception, USB transmission, system alarm and motor to get; And

Charactron is connected with described FPGA control circuit unit, is used to show described internal drive pulse cumulative number.

6. as claim 1,4 or 5 described drivers, it is characterized in that described FPGA control circuit unit also comprises:

Pulse counter module is connected with the pulse regneration module, and the umber of pulse that the described pulse regneration module in the described FPGA control circuit unit produces is counted;

Group of four figures display module is connected with described charactron, pulse counter module, control group of four figures pipe, and the pulse number described pulse counter module record shows on described charactron;

The internal state display module is connected with described indicator light, is used to control described indicator light, with the indication stepping motor just change, counter-rotating, USB reception, USB transmission, system alarm and motor get electrical information; And

Sending module is connected with described optical coupling isolation circuit unit, interface circuit converting unit, and the interaction data of external equipment is fed back to host computer through described interface circuit converting unit.