CN104021101A - USB interface system and implementation method based on LPC1768 platform - Google Patents
USB interface system and implementation method based on LPC1768 platform Download PDFInfo
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Abstract
The invention provides a USB interface system based on an LPC1768 platform. The USB interface system based on the LPC1768 platform comprises a central processing unit composed of LPC1768s, a first USB interface and a second USB interface. A bus power supply terminal of the first USB interface is connected with a host power switch. The central processing unit comprises a master-slave detection module, an interrupt processing module and a data transceiving module, wherein the master-slave detection module is used for determining work patterns of the system; the interrupt processing module and the data transceiving module carry out data transceiving according to the work patterns of the system in different interrupt modes. The invention further provides a USB interface implementation method based on the LPC1768 platform. The two USB interfaces are arranged, a USB master station and a USB slave station can be supported at the same time according to connection status of the two interfaces and modes selected for an upper computer, a circuit is simplified, and complexity of software is lowered.
Description
Technical field
The present invention relates to field, more particularly, relate to a kind of usb interface system and implementation method based on LPC1768 platform.
Background technology
USB OTG is mainly used in the connection between various equipment or mobile device, to carry out exchanges data, consumer electronics products such as PDA, mobile phone.USB otg standard, on the basis of complete compatible USB2.0 standard, has increased power management (saving power consumption) function, and its permission equipment both can be used as main frame, also can be used as peripheral hardware operation (dual-purpose OTG).OTG double-duty plant meets USB2.0 standard completely, and certain Host Detection ability can be provided, and supports main frame circular order agreement (HNP) and session request agreement (SRP).
The microcontroller based on ARM Cortex-M3 kernel that LPC1768 chip ShiNXP company releases, it not only can support main frame (HOST) function of USB, also supports equipment (DEVICE) function of USB.In the equipment of existing employing LPC1768 chip, need make USB under OTG pattern, support main frame and the slave function of USB by increasing ISP1301 chip, this has not only increased the complexity of circuit and the difficulty of programming, and has taken a large amount of cpu resources.
In addition, also the common interface chip that has at present special usb bus, support usb host mode and slave mode simultaneously, as CH375, its application for USB memory device directly provides the read-write interface of data block, and to take the physical sector of 512b be basic read-write unit, thereby USB memory device is reduced to a kind of external data memory, single-chip microcomputer can freely be read and write the data in USB memory device, also can freely define its data structure.But these chips have not only increased the complexity of circuit, also increased cost.
Summary of the invention
The technical problem to be solved in the present invention is, for above-mentioned usb host, slave function realizing circuit is complicated, cost is higher problem, provides a kind of usb interface system and implementation method based on LPC1768 platform.
The technical scheme that the present invention solves the problems of the technologies described above is, a kind of usb interface system based on LPC1768 platform is provided, comprise the CPU (central processing unit) being formed by LPC1768, this usb interface system also comprises that difference signal terminal is connected respectively to the first USB interface and the secondary USB interface of the same pin of CPU (central processing unit), and the bus-powered connecting terminals of described the first USB interface is connected to host power switch; Described CPU (central processing unit) comprises principal and subordinate's detection module, interruption processing module, data transmit-receive module, wherein:
Described principal and subordinate's detection module, for according to the mode decision system works pattern of the connection status of described the first USB interface and secondary USB interface and upper computer selecting, described mode of operation comprises master station mode and slave station mode;
Described interruption processing module, for when receiving data or have data to send, enters main website interrupt mode or slave station interrupt mode according to system works pattern; Described interruption processing module reads main frame interrupt register and makes that data transmit-receive module is carried out port event handling operation, fetch equipment interrupt register make data transmit-receive module carry out transceiving data operation when slave station interrupt mode when main website interrupt mode.
In the usb interface system based on LPC1768 platform of the present invention, the port events of described data transmit-receive module is processed operation and is comprised: read port event, put event flag, write-back TD controller state and remove interrupt identification; The transceiving data operation of described data transmit-receive module comprises: control end points reception data processing, control end points send data processing, logical endpoints receives data processing, logical endpoints transmission data processing.
In the usb interface system based on LPC1768 platform of the present invention, described CPU (central processing unit) also comprises enumerates module, the described module of enumerating sends order bag with by enumerate the information of obtain equipment to equipment end in system during in master station mode, and loads corresponding driving according to the information of obtaining; The described module of enumerating returns to main frame to allow main frame identify and drive by the information of equipment of itself in system during in slave station mode.
In the usb interface system based on LPC1768 platform of the present invention, described CPU (central processing unit) also comprises initialization module, for carrying out corresponding parameter configuration according to the mode of operation of system.
In the usb interface system based on LPC1768 platform of the present invention, described CPU (central processing unit) also comprises hot-swappable processing module, for detecting USB reset bus start and enumerate module when connecting pin and having high level signal input.
In the usb interface system based on LPC1768 platform of the present invention, described principal and subordinate's detection module confirms that when the first USB interface has equipment access and is set to master station mode system is in master station mode, have when equipment access and host computer are set to slave station mode and confirm that system is in slave station mode at secondary USB interface.
The present invention also provides a kind of USB interface implementation method based on LPC1768 platform, described LPC1768 platform comprises that LPC1768 chip and difference signal terminal are connected respectively to the first USB interface and the secondary USB interface of the same pin of LPC1768 chip, and the bus-powered connecting terminals of described the first USB interface is connected to host power switch, and the method comprises the following steps:
(a) according to the mode decision mode of operation of the connection status of described the first USB interface and secondary USB interface and selection, described mode of operation comprises master station mode and slave station mode;
(b) when receiving data or have data to send, according to current mode of operation, enter main website interrupt mode or slave station interrupt mode, wherein: when main website interrupt mode, read main frame interrupt register and make data transmit-receive module carry out port event handling operation, fetch equipment interrupt register make data transmit-receive module carry out transceiving data operation when slave station interrupt mode.
In the USB interface implementation method based on LPC1768 platform of the present invention, described step (b) comprises before: when confirming in master station mode, to equipment end, send order bag with by enumerating the information of the equipment of obtaining, and load corresponding driving according to the information of obtaining; Or when confirming in slave station mode, the information of equipment of itself is returned to main frame to allow main frame identify and to drive.
In the USB interface implementation method based on LPC1768 platform of the present invention, described step (b) comprises before: according to the mode of operation of confirming, carry out corresponding parameter configuration.
In the USB interface implementation method based on LPC1768 platform of the present invention, in described step (a), when the first USB interface has equipment access and is set to master station mode, confirm in master station mode, when secondary USB interface has equipment access and is set to slave station mode, confirm in slave station mode.
Usb interface system and implementation method based on LPC1768 platform of the present invention, by two USB interface being set and according to the pattern of the connection status of these two interfaces and upper computer selecting, realized and can support the function of USB main website and USB slave station simultaneously, and simplified circuit, reduced the complexity of software.
Accompanying drawing explanation
Fig. 1 is the hardware connection diagram that the present invention is based on the usb interface system embodiment of LPC1768 platform.
Fig. 2 is the schematic diagram of the CPU (central processing unit) in Fig. 1.
Fig. 3 is the schematic flow sheet that the present invention is based on the USB interface implementation method embodiment of LPC1768 platform.
Tu4Shi Tu3Zhong USB main website interrupts the schematic diagram of processing.
Fig. 5 is that in Fig. 3, USB slave station interrupts the schematic diagram of processing.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As Fig. 1, shown in 2, it is the schematic diagram that the present invention is based on the usb interface system embodiment of LPC1768 platform, it comprises that CPU (central processing unit) 10 based on LPC1768 chip is (on hardware, CPU (central processing unit) 10 comprises LPC1768 chip), the first USB interface USB-A and secondary USB interface USB-B, the difference signal terminal D+ of the first USB interface and secondary USB interface wherein, D-is connected respectively to the same pin USB_D+ of CPU (central processing unit) 10, USB_D-, and the bus-powered connecting terminals of the first USB interface is connected to host power switch (this host power switch for example can adopt LM3526-L), to realize usb host power supply, control.Above-mentioned the first USB interface USB-A and secondary USB interface USB-B can be used as respectively external IO interface.
This CPU (central processing unit) 10 is supported the OHCI interface of standard, pointer (pUhp) and data exchange zone (HCCA) of access OHCI register are provided, and the access of this pointer and data exchange zone is encapsulated, to external shield the details of register read-write.Particularly, above-mentioned CPU (central processing unit) 10 comprises principal and subordinate's detection module 11, interruption processing module 12, data transmit-receive module 13, and above-mentioned principal and subordinate's detection module 11, interruption processing module 12, data transmit-receive module 13 are realized by the software that operates in CPU (central processing unit) 10 respectively.
Principal and subordinate's detection module 11 is for determining according to the first USB interface USB-A and the connection status of secondary USB interface USB-B and the pattern of current selection (specifically can provide GUI to select for user by system) mode of operation that system adopts two USB interface data transmit-receive processes, and above-mentioned mode of operation comprises master station mode and slave station mode.Especially, this principal and subordinate's detection module 11 has and when equipment access and system are set to master station mode, confirms that system is in master station mode, have when equipment access and system are set to slave station mode and confirm that system is in slave station mode at secondary USB interface USB-B at the first USB interface USB-A.
Interruption processing module 12, for when receiving data or have data to send, makes system enter main website interrupt mode or slave station interrupt mode according to current mode of operation.During this interruption processing module 12 main website interrupt mode, read main frame interrupt register and make that data transmit-receive module 13 is carried out port event handlings operation, fetch equipment interrupt register make data transmit-receive module 13 carry out transceiving datas operation when slave station interrupt mode.
Particularly, under main website interrupt mode, the port events of data transmit-receive module 13 is processed operation and is comprised: read port event, put event flag, write-back TD controller state and remove interrupt identification; The transceiving data operation of data transmit-receive module 13 comprises: control end points reception data processing, control end points send data processing, logical endpoints receives data processing, logical endpoints transmission data processing.
Above-mentioned CPU (central processing unit) 10 also can comprise initialization module 15.This initialization module 15 is for carrying out corresponding parameter configuration according to the mode of operation of CPU (central processing unit) 10, and such as pin, clock, interruption etc. are configured, the USB main website that its concrete parameter realizes with other modes respectively, the parameter of USB slave station are identical.
Above-mentioned CPU (central processing unit) 10 also can comprise enumerates module 14.This is enumerated module 14 and to equipment end (being connected to the equipment of the first USB interface USB-A), sends order bag in system during in master station mode, with by enumerating the information (such as the classification of this equipment, communication mode etc.) of the equipment of obtaining, and load corresponding driving according to the information of obtaining from equipment end; This enumerates module 14 in system during in slave station mode, receive and respond the order bag of main frame, the information of equipment of itself (such as classification, communication mode etc.) is returned to main frame (being connected to the equipment of secondary USB interface USB-B) to allow main frame identify and to drive.After enumeration succeeds, data transmit-receive module 13 can carry out according to application layer protocol framing and the parse operation of data.
Above-mentioned CPU (central processing unit) 10 also can comprise hot-swappable processing module 16, for realizing the hot-swappable operation of two USB interface.This hot-swappable processing module 16 is for detecting USB when connecting pin USB_CONNET and having high level signal input (be USB connect on the differential signal D+ that pin USB_CONNET is corresponding draw), confirm that USB interface has accessed the USB device of a full speed, reset bus startup at once enumerated module 14 and carried out enumeration operation.
As described in Figure 3, it is the schematic flow sheet that the present invention is based on the USB interface implementation method embodiment of LPC1768 platform, wherein LPC1768 platform comprises that LPC1768 chip and difference signal terminal are connected respectively to the first USB interface and the secondary USB interface of the same pin of LPC1768 chip, and the bus-powered connecting terminals of the first USB interface is connected to host power switch (for example LM3526-L), and the method comprises the following steps:
Step S31:LPC1768 chip detects in real time the connection status of the first USB interface and secondary USB interface, and LPC1768 chip detects its USB_D+ and whether USB_D-pin has level signal input in real time.If any detecting in the first USB interface and secondary USB interface in this step has equipment access, perform step S32.
Step S32:LPC1768 chip determines whether as master station mode according to the pattern of selecting and the connection status of the first USB interface, if selected master station mode and the first USB interface to there is equipment access, confirm as master station mode, and perform step S33, otherwise execution step S34.
Step S33:LPC1768 chip, when receiving data or have data to send, enters main website interrupt mode.
Step S34:LPC1768 chip determines whether as slave station mode according to the pattern of selecting and the connection status of secondary USB interface, if selected slave station mode and secondary USB interface to there is equipment access, confirm as slave station mode, and perform step S35, otherwise return to step S31.
Step S35:LPC1768 chip, when receiving data or have data to send, enters main website interrupt mode.
In said method, also comprise: when confirming in master station mode, LPC1768 chip sends order bag to equipment end, with by enumerating the information of the equipment of obtaining, and load corresponding driving according to the information of obtaining; Or when confirming in slave station mode, the information of equipment of itself is returned to main frame to allow main frame identify and to drive.
In addition, said method also can comprise initialization step, according to the mode of operation of confirming, carries out corresponding parameter configuration.
In said method, under host mode, data transmission all completes by endpoint descriptor (ED) and these two kinds of data structures of transmission descriptor (TD), before transmitting, need ED and TD to arrange accordingly, just can guarantee the correctness of data transmission.Under slave mode, data transmission is by controlling end points and logical endpoints, data to be received and sent.
Particularly, as shown in Figure 4, Shi Tu3Zhong USB main website interrupts the process flow diagram for the treatment of step, and it specifically comprises:
Step S331: read main frame interrupt register HcInterruptStatus.
Step S332: when ports having event changes, read port event registers HcRhPortStatus1.
Step S333: put event flag, put connection status sign.
Step S334: write-back TD controller state.
Step S335: remove interrupt identification.
As shown in Figure 5, be the process flow diagram that in Fig. 3, USB slave station interrupts treatment step, it specifically comprises:
Step S351: fetch equipment interrupt register.
Step S352: control end points and receive data processing, carry out operations such as receiving SETUP bag, SM set mode register.
Step S353: control end points and send data processing, carry out and send operations such as controlling bag, SM set mode register.
Step S354: logical endpoints receives data processing, from reception buffer zone reading out data.
Step S355: logical endpoints sends data processing, sends data by end points.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. the usb interface system based on LPC1768 platform, comprise the CPU (central processing unit) being formed by LPC1768, it is characterized in that: this usb interface system also comprises that difference signal terminal is connected respectively to the first USB interface and the secondary USB interface of the same pin of CPU (central processing unit), and the bus-powered connecting terminals of described the first USB interface is connected to host power switch; Described CPU (central processing unit) comprises principal and subordinate's detection module, interruption processing module, data transmit-receive module, wherein:
Described principal and subordinate's detection module, for according to the mode decision system works pattern of the connection status of described the first USB interface and secondary USB interface and upper computer selecting, described mode of operation comprises master station mode and slave station mode;
Described interruption processing module, for when receiving data or have data to send, enters main website interrupt mode or slave station interrupt mode according to system works pattern; Described interruption processing module reads main frame interrupt register and makes that data transmit-receive module is carried out port event handling operation, fetch equipment interrupt register make data transmit-receive module carry out transceiving data operation when slave station interrupt mode when main website interrupt mode.
2. the usb interface system based on LPC1768 platform according to claim 1, is characterized in that: the port events of described data transmit-receive module is processed operation and comprised: read port event, put event flag, write-back TD controller state and remove interrupt identification; The transceiving data operation of described data transmit-receive module comprises: control end points reception data processing, control end points send data processing, logical endpoints receives data processing, logical endpoints transmission data processing.
3. the usb interface system based on LPC1768 platform according to claim 1, it is characterized in that: described CPU (central processing unit) also comprises enumerates module, the described module of enumerating sends order bag with by enumerate the information of obtain equipment to equipment end in system during in master station mode, and loads corresponding driving according to the information of obtaining; The described module of enumerating returns to main frame to allow main frame identify and drive by the information of equipment of itself in system during in slave station mode.
4. the usb interface system based on LPC1768 platform according to claim 3, is characterized in that: described CPU (central processing unit) also comprises initialization module, for carrying out corresponding parameter configuration according to the mode of operation of system.
5. the usb interface system based on LPC1768 platform according to claim 3, it is characterized in that: described CPU (central processing unit) also comprises hot-swappable processing module, for detecting USB reset bus start and enumerate module when connecting pin and thering is high level signal input.
6. the usb interface system based on LPC1768 platform according to claim 3, is characterized in that: described principal and subordinate's detection module confirms that when the first USB interface has equipment access and is set to master station mode system is in master station mode, have when equipment access and host computer are set to slave station mode and confirm that system is in slave station mode at secondary USB interface.
7. the USB interface implementation method based on LPC1768 platform, it is characterized in that: described LPC1768 platform comprises that LPC1768 chip and difference signal terminal are connected respectively to the first USB interface and the secondary USB interface of the same pin of LPC1768 chip, and the bus-powered connecting terminals of described the first USB interface is connected to host power switch, and the method comprises the following steps:
(a) according to the mode decision mode of operation of the connection status of described the first USB interface and secondary USB interface and selection, described mode of operation comprises master station mode and slave station mode;
(b) when receiving data or have data to send, according to current mode of operation, enter main website interrupt mode or slave station interrupt mode, wherein: when main website interrupt mode, read main frame interrupt register and make data transmit-receive module carry out port event handling operation, fetch equipment interrupt register make data transmit-receive module carry out transceiving data operation when slave station interrupt mode.
8. the USB interface implementation method based on LPC1768 platform according to claim 7, it is characterized in that: described step (b) comprises before: when confirming in master station mode, to equipment end, send order bag with by enumerating the information of the equipment of obtaining, and load corresponding driving according to the information of obtaining; Or when confirming in slave station mode, the information of equipment of itself is returned to main frame to allow main frame identify and to drive.
9. the USB interface implementation method based on LPC1768 platform according to claim 6, is characterized in that: described step (b) comprises before: according to the mode of operation of confirming, carry out corresponding parameter configuration.
10. the USB interface implementation method based on LPC1768 platform according to claim 6, it is characterized in that: in described step (a), when the first USB interface has equipment access and is set to master station mode, confirm in master station mode, when secondary USB interface has equipment access and is set to slave station mode, confirm in slave station mode.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991381A (en) * | 2015-03-17 | 2016-10-05 | 西门子公司 | Data bus connector and method for operating |
| CN106407554A (en) * | 2016-09-14 | 2017-02-15 | 郑州云海信息技术有限公司 | LPC bus simulation verification method and device capable of simultaneously supporting master and slave machine functions |
| WO2018107491A1 (en) * | 2016-12-16 | 2018-06-21 | 华为技术有限公司 | Data transmission method and device |
| CN108702830A (en) * | 2016-01-27 | 2018-10-23 | 飞利浦照明控股有限公司 | The system and method that peripheral equipment includes peripheral equipment |
| CN109062846A (en) * | 2018-01-29 | 2018-12-21 | 威锋电子股份有限公司 | Universal serial bus device and its operating method |
| CN110209620A (en) * | 2019-07-04 | 2019-09-06 | 深圳昆仑通态科技有限责任公司 | A kind of multiplex roles electronic equipment |
| US10955888B2 (en) | 2018-01-29 | 2021-03-23 | Via Labs, Inc. | Universal serial bus device and method for dynamically defining a power source or sink status for downstream facing ports |
| CN112579500A (en) * | 2020-12-08 | 2021-03-30 | 深圳市道通科技股份有限公司 | Method and device for prompting anti-misplug USB interface and electronic equipment |
| CN113341797A (en) * | 2021-05-27 | 2021-09-03 | 深圳中学 | Non-contact fingertip tremor recording system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1549094A (en) * | 2003-05-15 | 2004-11-24 | 凌阳科技股份有限公司 | USB interface mobile storage |
| CN1991690A (en) * | 2005-12-31 | 2007-07-04 | 北京菁华资源科技有限公司 | USB external master-salve interface module |
-
2014
- 2014-05-09 CN CN201410196493.0A patent/CN104021101A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1549094A (en) * | 2003-05-15 | 2004-11-24 | 凌阳科技股份有限公司 | USB interface mobile storage |
| CN1991690A (en) * | 2005-12-31 | 2007-07-04 | 北京菁华资源科技有限公司 | USB external master-salve interface module |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991381B (en) * | 2015-03-17 | 2019-04-05 | 西门子公司 | Data/address bus connector and method for operation |
| CN105991381A (en) * | 2015-03-17 | 2016-10-05 | 西门子公司 | Data bus connector and method for operating |
| US11397693B2 (en) | 2016-01-27 | 2022-07-26 | Signify Holding B.V. | Peripheral device, system including the peripheral device and method |
| CN108702830B (en) * | 2016-01-27 | 2021-07-13 | 昕诺飞控股有限公司 | Peripheral device, system including peripheral device and method |
| CN108702830A (en) * | 2016-01-27 | 2018-10-23 | 飞利浦照明控股有限公司 | The system and method that peripheral equipment includes peripheral equipment |
| CN106407554B (en) * | 2016-09-14 | 2019-09-24 | 郑州云海信息技术有限公司 | Lpc bus emulation verification method and device a kind of while that support slave function |
| CN106407554A (en) * | 2016-09-14 | 2017-02-15 | 郑州云海信息技术有限公司 | LPC bus simulation verification method and device capable of simultaneously supporting master and slave machine functions |
| CN108701106A (en) * | 2016-12-16 | 2018-10-23 | 华为技术有限公司 | A kind of data transmission method and equipment |
| WO2018107491A1 (en) * | 2016-12-16 | 2018-06-21 | 华为技术有限公司 | Data transmission method and device |
| CN109062846A (en) * | 2018-01-29 | 2018-12-21 | 威锋电子股份有限公司 | Universal serial bus device and its operating method |
| CN109062846B (en) * | 2018-01-29 | 2020-08-25 | 威锋电子股份有限公司 | Universal serial bus device and operation method thereof |
| US10955888B2 (en) | 2018-01-29 | 2021-03-23 | Via Labs, Inc. | Universal serial bus device and method for dynamically defining a power source or sink status for downstream facing ports |
| CN110209620A (en) * | 2019-07-04 | 2019-09-06 | 深圳昆仑通态科技有限责任公司 | A kind of multiplex roles electronic equipment |
| CN112579500A (en) * | 2020-12-08 | 2021-03-30 | 深圳市道通科技股份有限公司 | Method and device for prompting anti-misplug USB interface and electronic equipment |
| CN113341797A (en) * | 2021-05-27 | 2021-09-03 | 深圳中学 | Non-contact fingertip tremor recording system and method |
| CN113341797B (en) * | 2021-05-27 | 2023-01-17 | 深圳中学 | Non-contact fingertip tremor recording system and method |
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Application publication date: 20140903 |