CN101312336B - Stepping motor control device, stepping motor control method, image forming device and stepping motor - Google Patents
Stepping motor control device, stepping motor control method, image forming device and stepping motor Download PDFInfo
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- CN101312336B CN101312336B CN2008100969626A CN200810096962A CN101312336B CN 101312336 B CN101312336 B CN 101312336B CN 2008100969626 A CN2008100969626 A CN 2008100969626A CN 200810096962 A CN200810096962 A CN 200810096962A CN 101312336 B CN101312336 B CN 101312336B
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Abstract
A stepping motor control device comprises a plurality of buffers for storing data for driving a stepping motor, a read unit for reading the data from the buffer, and a write unit for writing the data in the buffer. The write unit includes a first mode for writing the data in the buffer in a process performed in a predetermined order, and a second mode for writing the data in the buffer in response to a request from the read unit to write the data.
Description
Technical field
The present invention relates to alleviate stepper motor control device, stepping motor control method, image processing system and the stepper motor of cpu load, the stepper motor control device that particularly in image processing system, uses.
Background technology
In image processing system, stepper motor is formed the paper supply motor that transports paper as the cooperation image.The rotating speed of stepper motor is controlled by the stepper motor control device.Here, when the rotating speed of stepper motor sharply changes, may cause the stepper motor imbalance.Therefore, require the stepper motor control device that stepper motor is started control stably and stops control.
Stepper motor control device in the past is at ASIC (Application Specific IntegratedCircuit: be equipped with a buffer application-specific integrated circuit (ASIC)).(Central ProcessingUnit: CPU) the pulse period data are written in the buffer, this pulse period data representation is used to export the cycle that drives the pulse that stepper motor uses to CPU.ASIC reads the data in the write buffer, and exports pulse based on these data.Writing the pulse period data in the buffer is to make stepper motor rotate to the amount in a step of certain angle.In order stepper motor to be started stably control and to stop control, the data of amount that need be suitable with multistep.
At this moment, in the data of the amount suitable, write, just can't start control stably and stop control stepper motor if the data of for example suitable with step amount are delayed with multistep.Therefore, data need not take place lingeringly to write.
Opening flat 8-149889 communique and Japanese documentation spy the Japanese documentation spy opens and discloses the technology that writes data to a plurality of buffers in the 2000-276435 communique.
Open flat 8-149889 communique according to the Japanese documentation spy, with one in a plurality of buffers as writing the target buffer device, with another as reading the target buffer device.Data be written in from another read target buffer device sense data during in carry out.And, from the data of reading the target buffer device read end after, conversion is read the target buffer device and is write the target buffer device.
Here, as long as do not finish, just can't carry out writing of data from the reading of all data of reading the target buffer device.At this moment, need a plurality ofly write the unification of target buffer device and carry out writing of data all, thereby the load of CPU increases, writing of data may postpone.
Open the 2000-276435 communique according to the Japanese documentation spy, will be written to a buffer a plurality of buffers from the data of processor output, promptly in first buffer.To be written to another buffer from the data of first buffer output, promptly second buffer.Writing of data is fashionable when first buffer is carried out, and based on the unlatching (ON) that sends interrupt signal/close (OFF) to judge, and carries out said write by Interrupt Process.
Here owing to carry out writing of data by Interrupt Process, if thereby carry out the increased frequency that data write, Interrupt Process will increase, thereby causes the load of CPU to increase.
Summary of the invention
The objective of the invention is to, a kind of stepper motor control device that writes that can alleviate the load of CPU and data can not take place lingeringly successfully to carry out is provided.
Another object of the present invention is to, a kind of image processing system that can form good image is provided.
Another purpose of the present invention is, a kind of stepper motor of control performance excellence is provided.
A further object of the present invention is, a kind of stepping motor control method that writes that can alleviate the load of CPU and data can not take place lingeringly successfully to carry out is provided.
The stepper motor control device that the present invention relates to comprises: a plurality of buffers, and storage is used to drive the data of stepper motor; Sensing element, sense data from buffer; And writing unit, in buffer, write data.Writing unit has: by write first pattern of data in buffer according to fixing processing in sequence; And when receive second pattern that to buffer, writes data when wishing to carry out request that data write from sensing element.
According to the present invention, the stepper motor control device drives with the writing of data by carry out stepper motor according to fixing handling in sequence, and receives hope from sensing element and carry out the request that data write and carry out writing of data.Consequently, can reduce the request of reception and carry out the number of times that data write.So, can alleviate the load of CPU, thereby writing of data can not take place lingeringly successfully to carry out.
Be preferably as follows: described stepper motor control device comprises that indication writes the writing position register of the buffer of data, writing unit has the write buffer judgement unit, and this write buffer judgement unit is differentiated in a plurality of buffers based on the said write location register can carry out the buffer that data write.
In addition, be preferably as follows: described stepper motor control device comprises the read-out position register of the buffer of indicating sense data, sensing element has the sense buffer judgement unit, and this sense buffer judgement unit is differentiated in a plurality of buffers based on described read-out position register can carry out the buffer that data are read.
In addition, be preferably as follows: writing unit carries out writing of data with the form of cyclic buffer.
In another aspect of this invention, image processing system comprises: stepper motor; And the above-mentioned stepper motor control device of controlling described stepper motor.
This image processing system is owing to have above-mentioned stepper motor control device, thereby can improve the control of quality of stepper motor, thereby can form preferable image.
Be preferably as follows: image processing system comprises: the image forming part that forms image; And the paper feed roller that transports paper to image forming part; Wherein, described stepper motor makes described paper feed roller rotation.
In addition, be preferably as follows: the stepper motor control device is controlled, and rises or slow falling so that the rotating speed of the paper feed roller that rotates by stepper motor is slow.
In addition, be preferably as follows: image processing system comprises by rotation the transfer belt that forms visual image thereon, and described stepper motor makes described transfer belt rotation.
In addition, be preferably as follows: the stepper motor control device is controlled, and keeps constant so that pass through the rotating speed of the transfer belt that stepper motor rotates.
In still another aspect of the invention, stepper motor has above-mentioned stepper motor control device.
This stepper motor is owing to have above-mentioned stepper motor control device, thereby can alleviate the load of CPU, thereby writing of data can not take place lingeringly successfully to carry out.
In another aspect of the present invention, the stepper motor control device comes the control step motor by the CPU that usually handles with Interrupt Process.The stepper motor control device comprises a plurality of buffers.Stepper motor is driven based on writing the data in a plurality of buffers.The stepper motor control device writes data by usual processing in a plurality of buffers.
So, the stepper motor control device carries out stepper motor driving writing with data by usual processing.Needn't carry out writing of data by Interrupt Process thus, therefore can alleviate the load of CPU, thereby writing of data can not take place lingeringly successfully to carry out.
Of the present invention other another aspect in, stepping motor control method is read the data that write in a plurality of buffers by sensing element, thus the control step motor.Stepping motor control method comprises the write step that writes the data that are used to drive stepper motor in a plurality of buffers.Write step comprises: by write the step of data in buffer according to fixing processing in sequence; And according to carrying out the request that data write and in buffer, write the step of data from sensing element.
So, stepping motor control method drives with the writing of data by carry out stepper motor according to fixing handling in sequence, and writes according to the data from sensing element and to ask to carry out writing of data.Consequently, can reduce according to request and carry out the number of times that data write.Thus, can alleviate the load of CPU, thereby writing of data can not take place lingeringly successfully to carry out.
Description of drawings
Fig. 1 is the integrally-built block diagram that the digital complex machine that one embodiment of the present invention relates to is shown;
Fig. 2 is the sketch that the part of the image processing system that digital complex machine had shown in Figure 1 is shown;
Fig. 3 is the schematic diagram that an example of the developer that image forming part had shown in Figure 2 is shown;
Fig. 4 is the block diagram that the structure of stepper motor control device and motor driving part is shown;
Fig. 5 is the structure chart that the structure of the group of buffers that ASIC has is shown;
Fig. 6 is the flow chart that the usual processing of CPU is shown;
Fig. 7 illustrates the flow chart that data write processing;
Fig. 8 is the flow chart that Interrupt Process is shown;
Fig. 9 is the schematic diagram that an example of the group of buffers that is made of two buffers is shown.
Embodiment
Below, with reference to the accompanying drawings embodiments of the present invention are described.Fig. 1 is the block diagram that the structure of this digital complex machine 10 is shown when the image processing system that one embodiment of the present invention relates to is applied to digital complex machine 10.With reference to figure 1, digital complex machine 10 comprises: control part 11, and the integral body of its logarithmic code compounding machine 10 is controlled; DRAM 12, and it is used to carry out writing and reading of view data etc.; Operating portion 13, it comprises the display screen of the information that shows that digital complex machine 10 is had, and as the interface between digital complex machine 10 and the user; Manuscript-transporting device 14, it automatically reads the position to the original copy of stipulating and transports original copy; Image reading unit 15, it is at the original copy that ships by manuscript-transporting device 14 is read in the position with scanner the image that reads of regulation; Image forming part 16, it is based on original copy that manuscript reading section 15 read etc. and form the image of this original copy; Sheet conveying portion 23, its automatically with sheet conveying to image forming part 16; The hard disk 17 of storing image data etc.; Be connected FAX (fax) Department of Communication Force 18 on the public line 20; And be used for network IF (interface) portion 19 that is connected with network 21.
The master copy data compressed encoding that control part 11 will be provided by image reading unit 15 also writes among the DRAM12, and read the data that write among the DRAM 12, and with described data expansion decoding back by image forming part 16 outputs.
In Fig. 1, the flow direction of thick-line arrow presentation video data, thin-line arrow is represented the flow direction of control signal or control data.
Here, the concrete structure to image forming part 16 describes.Fig. 2 is the sketch that the part of the image forming part 16 that digital complex machine 10 had is shown.In Fig. 2, solid arrow is represented the trend of paper 44, and dotted arrow is represented the direction of rotation of transfer belt 41.Fig. 3 is the schematic diagram that the example of the yellow developer 46a that image forming part shown in Figure 2 16 had is shown.With reference to figure 1～Fig. 3, image forming part 16 comprises: yellow developer 46a, magenta developer 46b, cyan developer 46c, black toner developer 46d.Yellow developer 46a comprises: photoreceptor 39a, electro-mechanical part 35a, the 36a of exposure portion, development section 37a.Electro-mechanical part 35a applies voltage to photoreceptor 39a, thereby makes the current potential of the surface band regulation of photoreceptor 39a.The 36a of exposure portion is by electro-mechanical part 35a and on the surface of charged photoreceptor 39a, the optical imagery of the yellow that forms based on the original copy that is read by image reading unit 15 of exposing to.So, on the surface of photoreceptor 39a, form electrostatic latent image.Development section 37a makes and is formed on the toner that the lip-deep electrostatic latent image of photoreceptor 39a adheres to yellow, forms yellow toner image.Developer 46b, developer 46c, developer 46d also are made like toner image of all kinds with developer 46a.Formed toner image of all kinds is overlapping and be transferred to first on the transfer belt 41 of the direction rotation shown in the dotted arrow in Fig. 2 according to the order of yellow, magenta, cyan, black not cause color shift ground.So, on transfer belt 41, form the full-colour image of the visual image that constitutes by yellow, magenta, cyan, black.Be formed on the transfer belt 41 full-colour image by transfer roll 42 by secondary transfer printing to paper 44.Specifically, be disposed at paper supply motor 45 in the sheet conveying portion 23 with paper 44 from symbol P
1Shown position in Fig. 2 the direction shown in the solid arrow, be that image forming part 16 transports.When paper 44 is transported to symbol P
2Shown position and when arriving transfer roll 42, full-colour image is transferred roller 42 secondary transfer printings to paper 44.Then, when paper 44 is transported to the position shown in the symbol P3 and arrives fixing roller 43, be transferred to full-colour image on the paper 44 by fixing roller 43 photographic fixing.Thus, on paper 44, form full-colour image.
Above-mentioned paper supply motor 45 is the stepper motors of regularly adjusting rotating speed that transport that cooperate paper, is subjected to the control of stepper motor control device.Here, the concrete structure to the stepper motor control device describes.Fig. 4 is the block diagram that the structure of stepper motor control device 26 and motor driving part 28 is shown.With reference to figure 1～Fig. 4, stepper motor control device 26 has CPU 25 and ASIC 27.ASIC 27 has the group of buffers 29 that is made of a plurality of buffers.Motor driving part 28 has stepper motor 24.In addition, though CPU 25 and ASIC 27 are comprised in the control part shown in Figure 1 11,, in Fig. 4, illustrate separately for the ease of understanding.In Fig. 4, solid arrow is represented the data write signal, and dotted arrow represents that data write request signal, thick-line arrow indicating impulse output signal.
CPU 25 is to ASIC 27 dateout write signals, thereby each buffer of the group of buffers 29 that ASIC 27 is had carries out writing of data.Here, CPU 25 is as writing unit.Writing unit comprises: by write first pattern of data in buffer according to fixing processing in sequence; And, when receiving from sensing element described later when wishing to carry out request that data write, in buffer, write second pattern of data.To this, will be described hereinafter.
Data are meant the pulse period data, and this pulse period data representation is used to export stepper motor and drives the cycle of using pulse.Specifically, it comprises the pulse duration of the pulse of exporting and the number of times of the pulse that output has this pulse duration.Writing the data in the buffer is to make stepper motor 24 rotate to the amount in a step of certain angle, and for example, when group of buffers 29 was made of 8 buffers, each buffer write a step, thereby write the amount in 8 steps in 8 buffers altogether.When changing the speed of stepper motor 24, in each buffer, write the different a plurality of data of pulse duration.
ASIC 27 reads by the data in the CPU 25 write buffer groups 29.Here, ASIC 27 is as sensing element.And ASIC 27 is based on the data of reading, to motor driving part 28 output pulses.In addition, ASIC 27 writes request signal to CPU 25 dateouts after the total data of sense buffer group 29, and request CPU 25 carries out writing of data.The CPU 25 that receives request is to ASIC 27 dateout write signals, thereby writes data to group of buffers 29.
Motor driving part 28 makes stepper motor 24 rotations based on the pulse by ASIC 27 outputs.Stepper motor 24 makes the rotation of paper feed roller (not shown), and this paper feed roller and paper 44 butts are to transport paper 44.
So, 26 pairs of stepper motors 24 of stepper motor control device are controlled.Specifically, when driving stepper motor 24, improve gradually sometimes that the what is called of rotating speed of stepper motor 24 is slow to be risen control and reduce gradually that the what is called of rotating speed of stepper motor 24 is slow falls control.In this case, need the different a plurality of data of pulse duration in the short time.Here, CPU 25 writes the different a plurality of data of pulse duration in each buffer.And, ASIC 27 sense datas, and come the different pulse of output pulse width based on these data.Motor driving part 28 fine changes the speed of stepper motor 24 based on the different pulse of pulse duration.Thus, carry out the slow liter control of stepper motor 24 and slowly fall control reposefully.
Fig. 5 is the structure chart that the structure of the group of buffers 29 that ASIC 27 had is shown.With reference to figure 5, group of buffers 29 in the present embodiment by buffer 30a to buffer 30h totally 8 buffers constitute.The storage stepper motor drives and uses data in each buffer 30a～30h, and carries out writing of data by CPU 25, carries out reading of data by ASIC 27.Write and the reading with the form of cyclic buffer of data of data are carried out.
Specifically, for example beginning to carry out writing of data, and be performed until last buffer 30h and after finishing, then begin to carry out writing of data from buffer 30a once more from buffer 30a.Reading too of data beginning to carry out reading of data from buffer 30a, and is performed until last buffer 30h and after finishing, then begins to carry out reading of data from buffer 30a once more.
In addition, writing of data is fashionable when carrying out, and based on the writing position register 31 of indicating the buffer that will write data, differentiation can be carried out the buffer that data write.Here, CPU 25 is as the write buffer judgement unit.After the writing of end data in indicated buffer, writing position register 32 moves to next buffer.
In addition, too, want the read-out position register 32 of the buffer of sense data based on indication when carrying out the reading of data, differentiation can be carried out the buffer that data are read.Here, ASIC 27 is as the sense buffer judgement unit.After the reading of end data in indicated buffer, read-out position register 32 moves to next buffer.In Fig. 5, dotted arrow is represented the moving direction of writing position register 31, and solid arrow is represented the moving direction of read-out position register 32.
As shown in Figure 5, as writing position register 31 indication buffer 30a, and during read-out position register 32 indication buffer 30e, the previous buffer 30d of CPU 25 32 indicated buffer 30e along the direction that writes data (direction among the figure shown in the dotted arrow) buffer 30a that writing position buffer 31 is indicated to the read-out position buffer differentiates the buffer for writing.That is, data are read and do not carry out the buffer that data write as yet in order to have finished with buffer 30a to 30d differentiation.In addition, the previous buffer 30h of ASIC 27 31 indicated buffer 30a along the direction (direction among the figure shown in the solid arrow) of sense data buffer 30e that read-out position buffer 32 is indicated to the writing position buffer differentiates the buffer for reading.That is, data write and do not carry out the buffer that data are read as yet in order to have finished to buffer 30h differentiation with buffer 30e.
By carrying out writing of data and reading of data, as long as assurance writing position register 31 and read-out position register 32 just can carry out writing of data and reading of data as above-mentioned.Therefore, can enough easy methods carry out writing of data and reading of data efficiently, and can alleviate the load of CPU 25.
In addition, by carrying out writing of data and reading of data with the form of cyclic buffer, even if in last buffer 30h, finish writing of data or reading of data, also can move to buffer 30a at once and carry out reading of writing of data or data.Therefore, can further alleviate the load of CPU 25.
The processing of CPU 25 when writing data in the subtend buffer here, describes.Fig. 6 is the flow chart that the usual processing of CPU 25 is shown.With reference to figure 1～Fig. 6, at first the usual processing to CPU 25 describes.
CPU 25 usually handles usually.Accept Interrupt Process then as required.So-called usual the processing, be meant in the digital complex machine 10 and form relevant a series of processing with image, be based on the processing that fixing order is carried out, comprising: by manuscript-transporting device 14 transport original copy processing, by image reading unit 15 read original copy treatment of picture, form treatment of picture, transport the processing of paper etc. by sheet conveying portion 23 by the view data of image forming part 16 based on original copy.
CPU 25 utilizes usual the processing to carry out forming relevant a series of processing (referring to the step S11 among Fig. 6, below omitting " step " speech) with image.In addition, CPU 25 utilizes the usual data of carrying out writing to buffer data of handling to write processing (S12).
Here, data being write processing describes.Fig. 7 illustrates the flow chart that data write processing.With reference to figure 1～Fig. 7, illustrate that data write processing.
CPU 25 differentiates from buffer 30a～30h and can carry out the buffer (S21) that data write based on writing position register 31.In the present embodiment, as shown in Figure 5, writing position register 31 indication buffer 30a, read-out position register 32 indication buffer 30e.Therefore, as mentioned above, it is the buffer that can write that buffer 30a is differentiated to buffer 30d.
Then, owing to have the buffer (being "Yes" among the S22) that can write, thereby 25 couples of buffer 30a of CPU carry out write (S23) of data to buffer 30d.The data of this moment write corresponding to first pattern.
In addition, in step 22, (be not "No" among the S22) when having the buffer that can write, end data writes processing, proceeds usual processing.
On the other hand, ASIC 27 reads the data that write by CPU 25.At this moment, after all data of sense buffer group 29, ASIC 27 writes request signal to CPU 25 dateouts, and request CPU 25 carries out writing of data.That is, carry out Interrupt Process to CPU 25 requests.
Fig. 8 is the flow chart that Interrupt Process is shown.With reference to figure 1～Fig. 8, Interrupt Process is described.
The data that CPU 25 receives from ASIC 27 write request signal (S31).Here, as mentioned above, owing to ASIC 27 total data of sense buffer group 29, thereby 25 couples of buffer 30a of CPU carry out write (S32) of data to all buffers of buffer 30h.So, Interrupt Process is meant that the data that receive from ASIC 27 write request and carry out the processing that data write.And be like that to finish the timing of reading of total data of group of buffers 29 to CPU 25 processing of request as mentioned above at ASIC 27.Interrupt Process is requested in various timings, for example forming timing that relevant a series of processing finish with image or can carry out timing that data write or the like determining shown in the step 21 of Fig. 7 shown in the step 11 of Fig. 6.
So, stepper motor control device 26 carries out stepper motor by usual processing and drives with the writing of data, and carries out writing of data by Interrupt Process.Consequently, can reduce by Interrupt Process and carry out the number of times that data write.So, can alleviate the load of CPU 25, thereby writing of data can not take place lingeringly successfully to carry out.
In addition, paper supply motor 45 is the stepper motors 24 by this stepper motor control device 26 controls, therefore, even needing under a plurality of data conditions such as slow liter control and slow falling in such short time of control, also can alleviate the load of CPU 25, thereby writing of data can not take place lingeringly successfully to carry out.Thus, the speed of paper supply motor 45 can be changed more reposefully, thereby paper can be transported rightly.
In addition, digital complex machine 10 is owing to possess this stepper motor control device 26, thereby can improve the control of quality of stepper motor 24, forms preferable image.
In addition, the control method of this stepper motor 24 is carried out stepper motor by usual processing and is driven with the writing of data, and carries out writing of data by Interrupt Process.Consequently, can reduce by Interrupt Process and carry out the number of times that data write.Thus, can alleviate the load of CPU 25, and writing of data can not take place lingeringly successfully to carry out.
In the above-described embodiment, to paper supply motor 45 is be illustrated by the example of the stepper motor 24 of this stepper motor control device 26 controls, but be not limited thereto, also can and rotate in the driven roller 47 of transfer belt 41 and adopt above-mentioned stepper motor 24 at shown in Figure 2 and transfer belt 41 butts.
Specifically, stepper motor 24 makes driven roller 47 rotations.Driven roller 47 is with transfer belt 41 butts and rotate transfer belt 41.The rotating speed of transfer belt 41 is monitored often, for example, by transducer etc. the rotating speed in the regulation interval of transfer belt 41 is detected, and comes thus to monitor often.
Overlapping as described above toner image of all kinds on transfer belt 41 forms full-colour image.Therefore, if the rotating speed of the offspeed of transfer belt 41 regulation then can produce color shift.Thereby can't form full-colour image clearly, so the rotating speed of transfer belt 41 need keep constant.
But, skid between the roller owing to transfer belt 41 and rotation transfer belt 41, transfer belt 41 passs in time and wear out or the cause of the thickness deviation at transfer belt 41 each position that the error when making etc. causes etc., it is constant that the rotating speed of transfer belt 41 is difficult to maintenance sometimes.Therefore,, prevent color shift, need carry out trickle control the rotating speed of the roller that drives transfer belt 41 for the rotating speed of transfer belt 41 is kept constant.
In this case, the rotating speed of the stepper motor 24 of 26 pairs of rotations of stepper motor control device driven roller 47 is revised.Specifically, CPU 25 writes the different a plurality of data of pulse duration of the characteristic of transfer belt 41 being included in consideration in each buffer.Then, ASIC 27 sense datas, and based on these data and the different pulse of output pulse width.Different pulses changes the speed of stepper motor 24 to motor driving part 28 based on pulse duration.So, the rotating speed of driven roller 47 is revised, the rotating speed maintenance of transfer belt 41 is constant.
Thus, can fine revise rotating speed, thereby the rotating speed of transfer belt 41 can be kept constant according to transfer belt 41.Thus, can prevent color shift, form full-colour image clearly.
In addition, for example so long as the use as the alignment governor motor the motor of stepper motor 24, also can adopt other motors.
In addition, in the above-described embodiment, in the step 23 of Fig. 7, buffer 30a being illustrated to the example that is written as that a plurality of buffers of buffer 30d carry out data, but also can carry out writing of data to any buffer in a plurality of buffers.
In addition, in the above-described embodiment, write the example of reading with data and be illustrated carry out data with the form of cyclic buffer, but be not limited thereto, also can carry out with other forms.For example, writing after the end of data, writing position register 31 moves to non-conterminous other buffers.Thus, CPU 25 writes data to other buffers.In addition, read-out position register 32 moves to non-conterminous other buffers similarly.Thus, ASIC 27 sense data from other buffers.
In addition, following example has been described in the above-described embodiment, that is: ASIC 27 is after the total data of sense buffer group 29, ask Interrupt Process to carry out writing of data to CPU 25, but be not limited thereto, for example also can detect the data of whether having read the defined amount buffer, and when having read the data of defined amount buffer, the request Interrupt Process is to carry out writing of data.
In addition, in the above-described embodiment, about Interrupt Process, illustrated in case receive data and write request signal from ASIC 27, just all buffers are carried out the example that data write, but be not limited thereto, also can differentiate and to carry out the buffer that data write, and plural buffer is carried out writing of data.
In addition, in the above-described embodiment, group of buffers 29 has 8 buffers altogether from buffer 30a to buffer 30h, as long as but have more than two.Fig. 9 shows an example of the group of buffers 50 that is made of two buffers.With reference to figure 9, group of buffers 50 is made of first buffer 51 and second buffer 52.
In addition, in the above-described embodiment, the example that CPU 25 and ASIC 27 is comprised in the control part 11 of digital complex machine 10 is illustrated, but is not limited thereto, and also can CPU and ASIC be set in addition in the inside of stepper motor control device.At this moment, the stepper motor control device can be used for using in other devices of motor.
In addition, stepper motor also can have this stepper motor control device 26.At this moment, stepper motor can alleviate the load of CPU, and writing of data can not take place lingeringly successfully to carry out.
In addition, in the above-described embodiment, be illustrated carry out the example that data write by usual processing and Interrupt Process, but be not limited thereto, with under usually handling, also can only carry out writing of data by usual processing with regard to enough situations only.Thereby stepper motor control device 26 carries out stepper motor by usual processing drives writing with data.Thus, do not need to carry out writing of data, therefore can alleviate the load of CPU, thereby writing of data can not take place lingeringly successfully to carry out by Interrupt Process.
In addition, in the above-described embodiment, the situation that forms full-colour image by digital complex machine 10 is illustrated, but is not limited thereto, also can be applied to form the situation of black and white image.
More than, with reference to the accompanying drawings embodiments of the present invention are illustrated, but the invention is not restricted to illustrated execution mode.Also can in or the scope that be equal to identical, implement various modifications and distortion to illustrated execution mode with the present invention.
Claims (11)
1. a stepper motor control device is characterized in that, comprising:
A plurality of buffers, storage is used to drive the data of stepper motor;
Sensing element, sense data from described buffer;
Writing unit writes data in described buffer;
Indication writes the writing position register of the buffer of data; And
The read-out position register of the buffer of indication sense data,
Wherein, the said write unit has: by write first pattern of data in described buffer according to fixing processing in sequence; And when receiving second pattern that to described buffer, writes data when wishing to carry out request that data write from described sensing element,
The said write unit has the write buffer judgement unit, and this write buffer judgement unit is differentiated in described a plurality of buffer based on said write location register and described read-out position register can carry out the buffer that data write,
Said write buffer judgement unit will be differentiated for can carry out the buffer that data write from indicated buffer to the previous buffer of the indicated buffer of described read-out position register of said write location register along the direction that writes data in described a plurality of buffers.
2. stepper motor control device as claimed in claim 1, wherein, the said write unit carries out writing of data with the form of cyclic buffer.
3. stepper motor control device as claimed in claim 1, wherein,
Come the control step motor by the CPU that usually handles with Interrupt Process,
Drive described stepper motor based on the data that write in described a plurality of buffer, and
In described a plurality of buffers, write data by described usual processing.
4. an image processing system is characterized in that, comprising:
Stepper motor; And
Control the described stepper motor control device of claim 1 of described stepper motor.
5. image processing system as claimed in claim 4, comprising:
Form the image forming part of image; And
Transport the paper feed roller of paper to described image forming part,
Wherein, described stepper motor makes described paper feed roller rotation.
6. image processing system as claimed in claim 5, wherein, described stepper motor control device is controlled, and rises or slow falling so that the rotating speed of the described paper feed roller that rotates by described stepper motor is slow.
7. image processing system as claimed in claim 4, comprising the transfer belt that forms visual image by rotation thereon,
Described stepper motor makes described transfer belt rotation.
8. image processing system as claimed in claim 7, wherein,
Described stepper motor control device is controlled, so that the rotating speed of the described transfer belt of rotating by described stepper motor keeps is constant.
9. stepper motor that comprises the described stepper motor control device of claim 1.
10. a stepper motor control device is characterized in that, comprising:
A plurality of buffers, storage is used to drive the data of stepper motor;
Sensing element, sense data from described buffer;
Writing unit writes data in described buffer;
Indication writes the writing position register of the buffer of data; And
The read-out position register of the buffer of indication sense data,
Wherein, the said write unit has: by write first pattern of data in described buffer according to fixing processing in sequence; And when receiving second pattern that to described buffer, writes data when wishing to carry out request that data write from described sensing element,
Described sensing element has the sense buffer judgement unit, and this sense buffer judgement unit is differentiated in described a plurality of buffer based on said write location register and described read-out position register can carry out the buffer that data are read,
Described sense buffer judgement unit direction along sense data in described a plurality of buffers will be differentiated for can carry out the buffer that data are read from indicated buffer to the previous buffer of the indicated buffer of said write location register of described read-out position register.
11. a stepping motor control method is read the data that write in a plurality of buffers by sensing element, the control step motor is characterized in that thus, comprising:
In a plurality of buffers, write the write step of the data that are used to drive stepper motor;
Indication writes the writing position indication step of the buffer of data;
The read-out position indication step of the buffer of indication sense data; And
Differentiate the write buffer discriminating step that can carry out the buffer that data write in described a plurality of buffer based on writing position and read-out position,
Wherein, the said write step comprises: by write the step of data in buffer according to fixing processing in sequence; And according to from the carrying out the request that data write and in buffer, write the step of data of sensing element,
Said write buffer discriminating step will be differentiated for can carry out the buffer that data write by indicated buffer to the previous buffer of the indicated buffer of described read-out position from the said write position along the direction that writes data in described a plurality of buffers.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007136640 | 2007-05-23 | ||
| JP2007-136640 | 2007-05-23 | ||
| JP2007136640 | 2007-05-23 |
Publications (2)
| Publication Number | Publication Date |
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| CN101312336A CN101312336A (en) | 2008-11-26 |
| CN101312336B true CN101312336B (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100969626A Expired - Fee Related CN101312336B (en) | 2007-05-23 | 2008-05-12 | Stepping motor control device, stepping motor control method, image forming device and stepping motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5448355B2 (en) |
| CN (1) | CN101312336B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9720742B2 (en) * | 2014-05-15 | 2017-08-01 | GM Global Technology Operations LLC | Service and system supporting coherent data access on multicore controller |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004072971A (en) * | 2002-08-09 | 2004-03-04 | Canon Inc | Motor controlling device, motor controlling method, and image-forming device |
| JP4715397B2 (en) * | 2005-08-30 | 2011-07-06 | セイコーエプソン株式会社 | Motor control device, electronic device and printer device |
| JP2007124790A (en) * | 2005-10-27 | 2007-05-17 | Kyocera Mita Corp | Drive circuit for rotary driving devices |
-
2008
- 2008-03-26 JP JP2008081517A patent/JP5448355B2/en not_active Expired - Fee Related
- 2008-05-12 CN CN2008100969626A patent/CN101312336B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101312336A (en) | 2008-11-26 |
| JP2009005576A (en) | 2009-01-08 |
| JP5448355B2 (en) | 2014-03-19 |
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