CN205405139U - A hardware circuit for long -range renewal of electric automobile single chip microcomputer program - Google Patents
A hardware circuit for long -range renewal of electric automobile single chip microcomputer program Download PDFInfo
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- CN205405139U CN205405139U CN201620129237.4U CN201620129237U CN205405139U CN 205405139 U CN205405139 U CN 205405139U CN 201620129237 U CN201620129237 U CN 201620129237U CN 205405139 U CN205405139 U CN 205405139U
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- 229940052961 longrange Drugs 0.000 title abstract 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000005693 optoelectronics Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000007812 deficiency Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model relates to a hardware circuit for long -range renewal of electric automobile single chip microcomputer program, including the singlechip, still include optoelectronic coupler U1, relay K, triode Q1, electric capacity C1, resistance R1 and resistance R2, relay K includes coil, first switch K1 and second switch K2. The singlechip adopts the freescale MPC55XX singlechip. According to the technical solution provided by the utility model, a hardware circuit for long -range renewal of electric automobile single chip microcomputer program, can solve exist among the prior art not enough, electric automobile production and maintenance efficiency are improved to the ground connection of quick accurate realization singlechip configuration pin.
Description
Technical field
This utility model relates to electric vehicle engineering field, is specifically related to a kind of hardware circuit remotely updated for electric automobile Single Chip Microcomputer (SCM) program.
Background technology
Single-chip microcomputer is the important component part of electric automobile, and the single-chip microcomputer of electric automobile generally adopts the CAN mode downloaded to carry out program renewal.At present, in the long-range renewal process of the program of single-chip microcomputer, generally adopting manual or external mode to carry out hardware configuration pin ground connection, this produces in enormous quantities for electric automobile and for the after-sales service stage, wastes time and energy, and reduces production and maintenance efficiency.
Utility model content
The purpose of this utility model is in that to provide a kind of hardware circuit remotely updated for electric automobile Single Chip Microcomputer (SCM) program, this hardware circuit can solve the problem that the deficiencies in the prior art, realize the ground connection of single-chip microcomputer configuration pin fast and accurately, improve electric automobile and produce and maintenance efficiency.
For achieving the above object, this utility model have employed techniques below scheme:
A kind of hardware circuit remotely updated for electric automobile Single Chip Microcomputer (SCM) program, including single-chip microcomputer, also includes photoelectrical coupler U1, relay K, audion Q1, electric capacity C1, resistance R1 and resistance R2；Described relay K includes coil, the first switch K1 and second switch K2.
Described single-chip microcomputer adopts Freescale MPC55XX single-chip microcomputer.
Specifically, described photoelectrical coupler U1, its input terminates the universal input and output port of described single-chip microcomputer, and a termination power of its outfan, the other end of its outfan is successively through resistance R1, resistance R2 ground connection；Described electric capacity C1 is connected in parallel on the two ends of resistance R2；Described audion Q1, its base stage is connected on the node between resistance R1 and resistance R2, and its colelctor electrode connects power supply through described coil, its grounded emitter；One termination power of described first switch K1, the other end is connected on the node between outfan and the resistance R1 of described photoelectrical coupler U1；The one of described second switch K2 terminates the configuration pin of described single-chip microcomputer, other end ground connection.
Further, the two ends of described coil are parallel with diode D1；Described diode D1, its anode connects the colelctor electrode of described audion, and its negative electrode connects power supply.
Further, the earth terminal of second switch K2 must altogether with the grounding pin of single-chip microcomputer.
From above technical scheme, the hardware circuit remotely updated for electric automobile Single Chip Microcomputer (SCM) program described in the utility model, can solve the problem that the deficiencies in the prior art, realize the ground connection of single-chip microcomputer configuration pin fast and accurately, improve electric automobile and produce and maintenance efficiency.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described further:
A kind of hardware circuit remotely updated for electric automobile Single Chip Microcomputer (SCM) program as shown in Figure 1, including single-chip microcomputer, also includes photoelectrical coupler U1, relay K, audion Q1, electric capacity C1, resistance R1 and resistance R2；Described relay K includes coil, the first switch K1 and second switch K2.Described single-chip microcomputer adopts Freescale MPC55XX single-chip microcomputer.Described first switch K1 and second switch K2 is normally opened contact.
Specifically, described photoelectrical coupler U1, its input terminates the universal input and output port of described single-chip microcomputer, and a termination power of its outfan, the other end of its outfan is successively through resistance R1, resistance R2 ground connection；Described electric capacity C1 is connected in parallel on the two ends of resistance R2；Described audion Q1, its base stage is connected on the node between resistance R1 and resistance R2, and its colelctor electrode connects power supply through described coil, its grounded emitter；One termination power of described first switch K1, the other end is connected on the node between outfan and the resistance R1 of described photoelectrical coupler U1；The one of described second switch K2 terminates the configuration pin of described single-chip microcomputer, other end ground connection.Another input end grounding of described photoelectrical coupler U1, and with the grounding pin of described single-chip microcomputer altogether.
Further, the two ends of described coil are parallel with diode D1；Described diode D1, its anode connects the colelctor electrode of described audion, and its negative electrode connects power supply.
Further, the earth terminal of second switch K2 must altogether with the grounding pin of single-chip microcomputer.
Operation principle of the present utility model is:
Hardware circuit described in the utility model, is matched by the method for CAN network more new procedures with Freescale MPC55XX single-chip microcomputer.When needing the program of electric automobile single-chip microcomputer is updated, first to low tension on electric automobile.When the instruction needing to carry out CAN download received by single-chip microcomputer, the universal input and output port GPIO mouth output high level of single-chip microcomputer drives audion Q1 conducting, driving the coil electricity of relay K, the first switch K1 and second switch K2 Guan Bi, relay K constitutes latching circuit.When second switch K2 is closure state, the configuration pin RSTCFG of single-chip microcomputer is namely by second switch K2 ground connection, and now, single-chip microcomputer just enters configuration status.After single-chip microcomputer enters configuration status, the original program of single-chip microcomputer can not run, the universal input and output port GPIO mouth of single-chip microcomputer no longer exports high level, but owing to audion Q1 and relay K have constituted latching circuit, the coil of relay K is continuously in "on" position, therefore, the first switch K1 and second switch K2 now remains able to reliable Guan Bi so that the configuration pin RSTCFG of single-chip microcomputer remains able to reliable ground when single-chip microcomputer carries out program more new procedures.After the download program of the single-chip microcomputer of electric automobile completes, by electric automobile power-off, single-chip microcomputer can be allowed to depart from configuration status.After being re-powered by electric automobile, single-chip microcomputer will run new program again.
Audion Q1 has been configured to saturation region by described resistance R1 and R2, and the collector current of audion Q1 can be increased sufficiently to drive the degree of relay K coil.
The coil of described relay K shutdown transient after powered up can produce reverse high voltage due to the effect of coil inductance, damages relay K and audion Q1.There is diode D1, just given the passage of backward voltage release, protect circuit components.
The coil of described relay K obtain electric after, if second switch K2 switchs K1 Guan Bi prior to first, may result in single-chip microcomputer and enter configuration status in advance, and cause without high level output, cause photoelectrical coupler U1 to close in advance, and the first switch K1 is not closed, audion Q1 base stage is without bias voltage, cannot turning on, the coil of relay K, by dead electricity, causes that configuration is interrupted.There is electric capacity C1, just can charge to it when photoelectrical coupler U1 turns on, even if second switch K2 switchs K1 Guan Bi prior to first, owing to electric capacity C1 forms bias voltage in the base stage electric discharge of audion Q1, audion Q1 remains able to effective conducting, until the first switch K1 Guan Bi, forms effective self-locking.
In sum, hardware circuit described in the utility model, it is possible to when Single Chip Microcomputer (SCM) program needs remotely to update, by the configuration pin ground connection of single-chip microcomputer, and the configuration pin ground connection of single-chip microcomputer in program renewal process, can be always ensured that, it is ensured that the stability of the long-range renewal process of Single Chip Microcomputer (SCM) program.This utility model is applicable to electric automobile and produces in enormous quantities and the after-sales service stage, it is possible to meet the demand that Single Chip Microcomputer (SCM) program remotely updates, and improves electric automobile and produces and maintenance efficiency.
Embodiment described above is only that preferred implementation of the present utility model is described; not scope of the present utility model is defined; under the premise designing spirit without departing from this utility model; various deformation that the technical solution of the utility model is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that this utility model claims are determined.
Claims (4)
1. the hardware circuit remotely updated for electric automobile Single Chip Microcomputer (SCM) program, including single-chip microcomputer, it is characterised in that: also include photoelectrical coupler U1, relay K, audion Q1, electric capacity C1, resistance R1 and resistance R2；Described relay K includes coil, the first switch K1 and second switch K2；
Described photoelectrical coupler U1, its input terminates the universal input and output port of described single-chip microcomputer, and a termination power of its outfan, the other end of its outfan is successively through resistance R1, resistance R2 ground connection；Described electric capacity C1 is connected in parallel on the two ends of resistance R2；Described audion Q1, its base stage is connected on the node between resistance R1 and resistance R2, and its colelctor electrode connects power supply through described coil, its grounded emitter；One termination power of described first switch K1, the other end is connected on the node between outfan and the resistance R1 of described photoelectrical coupler U1；The one of described second switch K2 terminates the configuration pin of described single-chip microcomputer, other end ground connection.
2. a kind of hardware circuit remotely updated for electric automobile Single Chip Microcomputer (SCM) program according to claim 1, it is characterised in that: described single-chip microcomputer adopts Freescale MPC55XX single-chip microcomputer.
3. a kind of hardware circuit remotely updated for electric automobile Single Chip Microcomputer (SCM) program according to claim 1, it is characterised in that: the two ends of described coil are parallel with diode D1；Described diode D1, its anode connects the colelctor electrode of described audion, and its negative electrode connects power supply.
4. a kind of hardware circuit remotely updated for electric automobile Single Chip Microcomputer (SCM) program according to claim 1, it is characterised in that: the earth terminal of described second switch K2 is with the grounding pin of single-chip microcomputer altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620129237.4U CN205405139U (en) | 2016-02-19 | 2016-02-19 | A hardware circuit for long -range renewal of electric automobile single chip microcomputer program |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620129237.4U CN205405139U (en) | 2016-02-19 | 2016-02-19 | A hardware circuit for long -range renewal of electric automobile single chip microcomputer program |
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| Publication Number | Publication Date |
|---|---|
| CN205405139U true CN205405139U (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620129237.4U Expired - Fee Related CN205405139U (en) | 2016-02-19 | 2016-02-19 | A hardware circuit for long -range renewal of electric automobile single chip microcomputer program |
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| CN (1) | CN205405139U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109606048A (en) * | 2018-11-21 | 2019-04-12 | 江苏科技大学 | A kind of air pressure adaptively changing air spring and its air pressure control method |
| CN113180775A (en) * | 2021-06-07 | 2021-07-30 | 黎丽英 | Control circuit of rapid hemostasis device with air bag |
-
2016
- 2016-02-19 CN CN201620129237.4U patent/CN205405139U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109606048A (en) * | 2018-11-21 | 2019-04-12 | 江苏科技大学 | A kind of air pressure adaptively changing air spring and its air pressure control method |
| CN109606048B (en) * | 2018-11-21 | 2021-07-09 | 江苏科技大学 | A kind of air pressure adaptively changing air spring and its air pressure control method |
| CN113180775A (en) * | 2021-06-07 | 2021-07-30 | 黎丽英 | Control circuit of rapid hemostasis device with air bag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20190219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |