CN104539274A - Reset circuit and WiFi communication system - Google Patents
Reset circuit and WiFi communication system Download PDFInfo
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- CN104539274A CN104539274A CN201410857321.3A CN201410857321A CN104539274A CN 104539274 A CN104539274 A CN 104539274A CN 201410857321 A CN201410857321 A CN 201410857321A CN 104539274 A CN104539274 A CN 104539274A
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Abstract
The invention discloses a reset circuit and a WiFi communication system. One end of a detection circuit is connected with the state end of a WiFi communication module, the other end of the detection circuit is connected with a time delay circuit, the time delay circuit is connected with one end of a discrimination circuit, the other end of the discrimination circuit is connected with one end of a reset on-off circuit and one end of a rapid discharge circuit, the other end of the reset on-off circuit is connected with the reset end of the WiFi communication module, and the other end of the rapid discharge circuit is connected with the state end of the WiFi communication module. Through the specific connection of the circuits, the purposes of detecting the working state of the WiFi communication module through the hardware circuits and resetting the WiFi communication module when an abnormity occurs are achieved, it is avoided that software is adopted for detecting the working state and resetting the state, and therefore the problems that due to the adoption of the software, the research and development cost is high and wide popularization is difficult are avoided.
Description
Technical field
The present invention relates to WiFi communication field, particularly relate to a kind of reset circuit and WiFi communication system.
Background technology
Along with developing rapidly of Internet technology, intelligent appliance is more and more universal in family life.To realize the remote operation of household electrical appliances, need the communication module increasing a WiFi in control circuit.
In order to improve reliability of operation, require that the WiFi communication module in control circuit can automatically reset when operation irregularity.
At present, usual employing software form realizes detecting the operating state of WiFi communication module and realizes resetting, although and adopt software form to realize the detection of operating state and reset reliability strong, its R&D costs are higher, are unfavorable for the extensive popularization of product.
Summary of the invention
In view of this, the invention provides a kind of reset circuit and WiFi communication system, with solve in prior art by software simulating to the detection of WiFi communication module work state and the R&D costs of reset high, be unfavorable for the problem extensively promoted, its concrete scheme is as follows:
A kind of reset circuit, comprising:
The testing circuit be connected with the state end of WiFi communication module, the delay circuit be connected with described testing circuit, the judging circuit be connected with described delay circuit, the reseting switch circuit be connected respectively with the reset terminal of described judging circuit and WiFi communication module, the quick discharging circuit be connected respectively with the state end of described judging circuit, WiFi communication module and the reset terminal of WiFi communication module
The level signal that the state end that described testing circuit receives described WiFi communication module exports, and described level signal is detected;
Level signal after described delay circuit receiving test circuit detects, and after delay predetermined time, output signal;
Described judging circuit receives the signal that described delay circuit exports, judge whether described signal reaches pre-conditioned, if, then described signal is sent to described reseting switch circuit, described reseting switch circuit sends the reset terminal of reset signal to described WiFi communication module, controls WiFi communication module resets; If not, then described signal is sent to described quick discharging circuit, carries out repid discharge.
Further, described testing circuit comprises: the first resistance, the second resistance, the 3rd resistance, the first PNP type triode,
One end of described first resistance is connected with the state end of WiFi communication module, the other end is connected with the base stage of the first PNP type triode, the base stage of described first PNP type triode is connected with power supply by described second resistance, the grounded collector of described first PNP type triode, the emitter of described first PNP type triode is connected with power supply by described 3rd resistance, and the emitter of described first PNP type triode is connected with described delay circuit.
Further, described delay circuit comprises: the 3rd resistance, the 4th resistance, first have polar capacitor,
While one end of described 4th resistance is connected with described testing circuit, power supply is connected by described 3rd resistance, the other end of described 4th resistance has the positive pole of polar capacitor to be connected with described first, described first has the positive pole of polar capacitor to be connected with described judging circuit, the described first minus earth having a polar capacitor.
Further, described judging circuit comprises: the first comparator, the second comparator, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, second have polar capacitor,
The in-phase input end of described first comparator is connected with described delay circuit, inverting input is by while described tenth grounding through resistance, power supply is connected by the 11 resistance, while output is connected with described reseting switch circuit, power supply is connected by the 15 resistance, be connected with the output of the second comparator simultaneously, while the inverting input of described second comparator is connected with the normal phase input end of described first comparator, the positive pole of polar capacitor is had to be connected by described 12 resistance with described second, described second have the minus earth of polar capacitor while, be connected with the in-phase input end of described second comparator by described 13 resistance, the in-phase input end of described second comparator connects power supply by described 14 resistance, described second has the positive pole of polar capacitor to be connected with described quick discharging circuit.
Further, described reseting switch circuit comprises: the second NPN type triode, the 16 resistance, the 17 resistance, the 18 resistance, the 3rd electric capacity,
The base stage of described second NPN type triode is connected with described judging circuit by described 16 resistance, while the grounded emitter of described second NPN type triode, be connected with the reset terminal of WiFi communication module by described 3rd electric capacity, the collector electrode of described second NPN type triode is connected by the reset terminal of the 18 resistance with described WiFi communication module while being connected with power supply by the 17 resistance.
Further, described quick discharging circuit comprises: the first PNP type triode, the 3rd comparator, the 4th comparator, the first diode, the second diode, the 3rd diode, first have polar capacitor, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance
The inverting input of described 4th comparator is connected with described judging circuit, normal phase input end is successively by described 5th resistance, 3rd diode, while first diode is connected with power supply, be connected by the output of the 6th resistance with described 4th comparator, the output of described 4th comparator is connected with the normal phase input end of described 3rd comparator, while the inverting input of described 3rd comparator is connected with power supply by the 7th resistance, by the 8th grounding through resistance, while the output of described 3rd comparator is connected with the emitter of the first PNP type triode, successively by the second diode, 9th resistance, first has polar capacitor ground connection.
Further, the scheduled time of described delay circuit time delay is specially: 6s.
A kind of WiFi communication system, comprising: WiFi communication module, the reset circuit be connected with described WiFi communication module,
Described reset circuit comprises: the testing circuit be connected with the state end of WiFi communication module, the delay circuit be connected with described testing circuit, the judging circuit be connected with described delay circuit, the reseting switch circuit be connected respectively with the reset terminal of described judging circuit and WiFi communication module, the quick discharging circuit be connected respectively with the state end of described judging circuit, WiFi communication module and the reset terminal of WiFi communication module
The level signal that the state end that described testing circuit receives described WiFi communication module exports, and described level signal is detected;
Level signal after described delay circuit receiving test circuit detects, and after delay predetermined time, output signal;
Described judging circuit receives the signal that described delay circuit exports, judge whether described signal reaches pre-conditioned, if, then described signal is sent to described reseting switch circuit, described reseting switch circuit sends the reset terminal of reset signal to described WiFi communication module, controls WiFi communication module resets; If not, then described signal is sent to described quick discharging circuit, carries out repid discharge.
Further, described delay circuit comprises: the 3rd resistance, the 4th resistance, first have polar capacitor,
While one end of described 4th resistance is connected with described testing circuit, power supply is connected by described 3rd resistance, the other end of described 4th resistance has the positive pole of polar capacitor to be connected with described first, described first has the positive pole of polar capacitor to be connected with described judging circuit, the described first minus earth having a polar capacitor.
Further, described reseting switch circuit comprises: the second NPN type triode, the 16 resistance, the 17 resistance, the 18 resistance, the 3rd electric capacity,
The base stage of described second NPN type triode is connected with described judging circuit by described 16 resistance, while the grounded emitter of described second NPN type triode, be connected with the reset terminal of WiFi communication module by described 3rd electric capacity, the collector electrode of described second NPN type triode is connected by the reset terminal of the 18 resistance with described WiFi communication module while being connected with power supply by the 17 resistance.
As can be seen from technique scheme, reset circuit disclosed in the present application and WiFi communication system, be connected with the state end of WiFi communication module by one end of testing circuit, the other end is connected with delay circuit, delay circuit is connected with one end of judging circuit, the other end of judging circuit is connected with one end of reseting switch circuit and one end of quick discharging circuit respectively, the other end of reseting switch circuit is connected with the reset terminal of WiFi communication module, and the other end of quick discharging circuit is connected with the state end of WiFi communication module.This programme is by the concrete connection of above-mentioned each circuit, achieve by hardware circuit to the detection of WiFi communication module work state and occur abnormal time, to the reset of WiFi communication module, avoid and adopt the detection of software simulating operating state and the reset of state, avoid the R&D costs using software to bring high, be unfavorable for the problem extensively promoted.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of Fig. 1 a kind of reset circuit disclosed in the embodiment of the present invention;
The circuit diagram of Fig. 2 a kind of testing circuit disclosed in the embodiment of the present invention;
The circuit diagram of Fig. 3 a kind of delay circuit disclosed in the embodiment of the present invention;
The circuit diagram of Fig. 4 a kind of judging circuit disclosed in the embodiment of the present invention;
The circuit diagram of Fig. 5 a kind of reseting switch circuit disclosed in the embodiment of the present invention;
The circuit diagram of Fig. 6 a kind of quick discharging circuit disclosed in the embodiment of the present invention;
The circuit diagram of Fig. 7 a kind of reset circuit disclosed in the embodiment of the present invention;
The structural representation of Fig. 8 a kind of WiFi communication system disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention discloses a kind of reset circuit, its structural representation as shown in Figure 1, comprising:
The testing circuit 11 be connected with the state end of WiFi communication module, the delay circuit 12 be connected with testing circuit 11, the judging circuit 13 be connected with delay circuit 12, the reseting switch circuit 14 be connected respectively with the reset terminal of judging circuit and WiFi communication module, the quick discharging circuit 15 be connected respectively with the state end of judging circuit 13, WiFi communication module and the reset terminal of WiFi communication module.
The level signal that the state end that testing circuit 11 receives WiFi communication module exports, and level signal is detected, judge that this level signal is high level or low level, thus realize the detection to WiFi communication module work state.
Level signal after delay circuit 12 receiving test circuit 11 detects, and after delay predetermined time, output signal.After delay circuit 12 delay predetermined time, then export signal, when being to judge the level signal received, normal signal or abnormal signal, namely judge that the operating state of WiFi communication module is normal or abnormal.
Preferably, in scheme disclosed in the present embodiment, the scheduled time can be 6s, namely after delay circuit 12 time delay 6s, signal is exported to judging circuit 13.
The signal that judging circuit 13 reception delay circuit 12 exports, judge whether this signal reaches pre-conditioned, if, then this signal is sent to reseting switch circuit 14, reseting switch circuit 14 sends the reset terminal of reset signal to WiFi communication module, control the reset of WiFi communication module, make its operating state recover normal; If this signal does not reach predetermined condition, then this signal is sent to quick discharging circuit 15, carries out repid discharge, to ensure that judging circuit 13 can accurately judge in next differentiation cycle.
That is, when the level signal that the state end of WiFi communication module exports is low level, show that the operating state of WiFi communication module is normal, now the reset terminal of WiFi communication module exports high level; When the level signal that the state end of WiFi communication module exports is high level, judge the time that this high level continues, if the duration is within 6s, then reset circuit does not export pulse, namely shows that WiFi communication module recovers normal automatically; When the level signal that the state end of WiFi communication module exports is high level, judge the time that this high level continues, if the duration is more than 6s, then reset circuit exports the low level pulse of 200 milliseconds, make WiFi communication module after the low level pulse receiving reset circuit output, reset, WiFi communication module recovery is normally worked.
Reset circuit disclosed in the present embodiment, be connected with the state end of WiFi communication module by one end of testing circuit, the other end is connected with delay circuit, delay circuit is connected with one end of judging circuit, the other end of judging circuit is connected with one end of reseting switch circuit and one end of quick discharging circuit respectively, the other end of reseting switch circuit is connected with the reset terminal of WiFi communication module, and the other end of quick discharging circuit is connected with the state end of WiFi communication module.This programme is by the concrete connection of above-mentioned each circuit, achieve by hardware circuit to the detection of WiFi communication module work state and occur abnormal time, to the reset of WiFi communication module, avoid and adopt the detection of software simulating operating state and the reset of state, avoid the R&D costs using software to bring high, be unfavorable for the problem extensively promoted.
Present embodiment discloses a kind of testing circuit, be applied to reset circuit, its circuit diagram as shown in Figure 2, comprising:
First resistance R1, the second resistance R2, the 3rd resistance R3, the first PNP type triode Q1.
One end of first resistance R1 is connected with the state end of WiFi communication module, the other end is connected with the base stage of the first PNP type triode Q1, the grounded collector of the first PNP type triode Q1, the emitter of the first PNP type triode Q1 is connected with power supply by the 3rd resistance R3, and the emitter of the first PNP type triode Q1 is connected with delay circuit.
Wherein, power supply is 3.3V stabilized voltage power supply, and the resistance of the first resistance R1 is 2000 Europe, and the resistance of the second resistance R2 is 10000 Europe, and the resistance of the 3rd resistance R3 is 1000 Europe.
First PNP type triode Q1 is sense switch, when the state end input low level of WiFi communication module, and the first PNP type triode Q1 conducting; When the state end input high level of WiFi communication module, first PNP type triode Q1 cut-off, first resistance R1 is biasing resistor, first resistance R1 provides suitable base current for the first PNP type triode Q1, during the state end input high level of WiFi communication module, second resistance R2 pull-up base potential, the first PNP type triode Q1 can realize quick cut-off.
Testing circuit disclosed in the present embodiment is applied in reset circuit, is connected, realize the detection to level by the circuit of the first resistance, the second resistance, the 3rd resistance and the first PNP type triode, thus realizes the detection to the running status of WiFi communication module.
Present embodiment discloses a kind of delay circuit, be applied to reset circuit, its circuit diagram as shown in Figure 3, comprising:
3rd resistance R3, the 4th resistance R4, first has polar capacitor E1.
While one end of 4th resistance R4 is connected with testing circuit, power supply is connected by the 3rd resistance R3, the other end and first of the 4th resistance R4 has the positive pole of polar capacitor E1 to be connected, and first has the positive pole of polar capacitor E1 to be connected with judging circuit, the first minus earth having a polar capacitor E1.
Wherein, power supply is 3.3V stabilized voltage power supply, and the resistance of the 3rd resistance R3 is 1000 Europe, and the resistance of the 4th resistance R4 is 600K Europe, and first has polar capacitor E1 to be 10 μ F.
When the first PNP type triode Q1 cut-off, power supply has polar capacitor E1 to charge by RC loop to first, and after the scheduled time, output voltage is lifted to and relates to required voltage.
Wherein, the scheduled time is 6s.
Present embodiment discloses a kind of delay circuit; be applied to reset circuit; there is the circuit of polar capacitor connection realization to the time delay of input signal by the 3rd resistance, the 4th resistance, first and export, for the normal or abnormal judgement of input state signal provides foundation.
Present embodiment discloses a kind of judging circuit, be applied to reset circuit, its circuit diagram as shown in Figure 4, comprising:
First comparator U1, the second comparator U2, the tenth resistance R10, the 11 resistance R11, the 12 resistance R12, the 13 resistance R13, the 14 resistance R14, the 15 resistance R15, second has polar capacitor E2.
The in-phase input end of the first comparator U1 is connected with delay circuit, inverting input is by while the tenth resistance R10 ground connection, power supply is connected by the 11 resistance R11, while output is connected with reseting switch circuit, power supply is connected by the 15 resistance R15, connect with the output single-phase of the second comparator U2 simultaneously, while the inverting input of the second comparator U2 is connected with the normal phase input end of the first comparator U1, the positive pole of polar capacitor E2 is had to be connected by the 12 resistance R12 and second, second have the minus earth of polar capacitor E2 while, be connected with the in-phase input end of the second comparator U2 by the 13 resistance R13, the in-phase input end of the second comparator U2 connects power supply by the 14 resistance R14, second has the positive pole of polar capacitor E2 to be connected with quick discharging circuit.
Wherein, power supply is 3.3V stabilized voltage power supply, the resistance of the tenth resistance R10 is 10K Europe, the resistance of the 11 resistance R11 is 4.7K Europe, the resistance of the 12 resistance R12 is 10K Europe, and the resistance of the 13 resistance R13 is 10K Europe, and the resistance of the 14 resistance R14 is 3.9K Europe, the resistance of the 15 resistance R15 is 2K Europe, and second has polar capacitor E2 to be 1 μ F.
The comparison threshold interval of the reference voltage composition of the first comparator U1 and the second comparator U2 is [U
1, U
2], wherein, U
2thered is provided by the 13 resistance R13 and the 14 resistance R14 and power supply, U
1thered is provided by the tenth resistance R10, the 11 resistance R11 and power supply.
When the output signal of delay circuit, i.e. the input signal of judging circuit, is set to the second voltage, and when the second voltage is interval lower than comparison threshold, the voltage of the junction of judging circuit and reseting switch circuit is set to tertiary voltage, tertiary voltage output low level; When the second voltage enters in comparison threshold interval, namely the second magnitude of voltage is greater than U
1time, tertiary voltage exports high level, and power supply continues have polar capacitor E1, second to have polar capacitor E2 to charge, until the second magnitude of voltage is greater than U to first
2time, tertiary voltage transfers output low level to again, during this period, realizes the high level pulse that tertiary voltage exports 200 milliseconds.
Judging circuit disclosed in the present embodiment, polar capacitor is had to connect through oversampling circuit by the first comparator, the second comparator, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, second, realize the differentiation of the signal to the input of WiFi communication module, differentiate that whether its operating state is normal, and according to different differentiation results, output signal to different circuit structures.
Present embodiment discloses a kind of reseting switch circuit, be applied to reset circuit, its circuit diagram as shown in Figure 5, comprising:
Second NPN type triode Q2, the 16 resistance R16, the 17 resistance R17, the 18 resistance R18, the 3rd electric capacity C3.
The base stage of the second NPN type triode Q2 is connected with judging circuit by the 16 resistance R16, while the grounded emitter of the second NPN type triode Q2, be connected with the reset terminal of WiFi communication module by the 3rd electric capacity C3, the collector electrode of the second NPN type triode Q2 is connected with the reset terminal of WiFi communication module by the 18 resistance R18 while being connected with power supply by the 17 resistance R17.
Wherein, power supply is 3.3V stabilized voltage power supply, and the resistance of the 16 resistance R16 is 2K Europe, and the resistance of the 17 resistance R17 is 4.7K Europe, and the resistance of the 18 resistance R18 is 2K Europe, and the 3rd electric capacity C3 is 102 μ F.
If the voltage that judging circuit inputs to reseting switch circuit is tertiary voltage, when judging circuit exports tertiary voltage, control the second NPN type triode Q2 and export reset signal, when tertiary voltage is low level, second NPN type triode Q2 cut-off, the signal that reseting switch circuit exports WiFi communication module resets end to is high level, and WiFi communication module is failure to actuate; When tertiary voltage is high level, the second NPN type triode Q2 conducting, the signal that reseting switch circuit exports WiFi communication module resets end to is low level, WiFi communication module resets.
Wherein, the effect of the 3rd electric capacity C3 is the clutter of filtered output signal.
Reseting switch circuit disclosed in the present embodiment, be applied to reset circuit, connected through oversampling circuit by the second NPN type triode, the 16 resistance, the 17 resistance, the 18 resistance, the 3rd electric capacity, realize the conversion to the low and high level of input signal, thus the reset realized WiFi communication module, make its operating state recover normal.
Present embodiment discloses a kind of quick discharging circuit, be applied to reset circuit, its circuit diagram as shown in Figure 6, comprising:
First PNP type triode Q1, the 3rd comparator U3, the 4th comparator U4, the first diode D1, the second diode D2, the 3rd diode D3, first has polar capacitor E1, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9.
The inverting input of the 4th comparator U4 is connected with judging circuit, normal phase input end is successively by the 5th resistance R5, 3rd diode D3, while first diode D1 is connected with power supply, be connected with the output of the 4th comparator U4 by the 6th resistance R6, the output of the 4th comparator U4 is connected with the normal phase input end of the 3rd comparator U3, while the inverting input of the 3rd comparator U3 is connected with power supply by the 7th resistance R7, by the 8th resistance R8 ground connection, while the output of the 3rd comparator U3 is connected with the emitter of the first PNP type triode Q1, by the second diode D2, 9th resistance R9, first has polar capacitor E1 ground connection.
Wherein, power supply is 3.3V stabilized voltage power supply, and the resistance of the 5th resistance R5 is 2.4K Europe, and the resistance of the 6th resistance R6 is 10K Europe, and the resistance of the 7th resistance R7 is 4.7K Europe, and the resistance of the 8th single group R8 is 10K Europe, and the resistance of the 9th resistance R9 is 120 Europe.
The reference voltage U of the normal phase input end of the 4th comparator U4
athered is provided by power supply, the first diode D1, the 3rd diode D3, the 5th resistance R5, the 6th resistance R6, the reference voltage U of the normal phase input end of the 3rd comparator U3
bthered is provided by the 7th resistance R7, the 8th resistance R8, power supply.
Quick discharging circuit disclosed in the present embodiment can realize the fast initialization of reset circuit.
The voltage between judging circuit and quick discharging circuit is made to be the 4th voltage, when the 4th voltage is lower than the comparison threshold interval [U of judging circuit
1, U
2] time, delay circuit stops the charging having polar capacitor E2 to second, the first PNP type triode Q1 conducting, and second has polar capacitor E2 through the second diode D2, the 9th resistance R9, the first PNP type triode Q1 loop repid discharge; When the 4th resistance is greater than U
atime, the normal phase input end output low level of the 4th comparator U4, the normal phase input end output low level of the 3rd comparator U3, second diode D2 conducting, second has polar capacitor E2 by the normal phase input end loop repid discharge of the second diode D2, the 9th resistance R9, the 3rd comparator U3, and avoiding affects judging circuit differentiates cycle judgement to next.
Quick discharging circuit disclosed in the present embodiment, be applied to reset circuit, polar capacitor, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance is had to connect through oversampling circuit by the first PNP type triode, the 3rd comparator, the 4th comparator, the first diode, the second diode, the 3rd diode, first, realize the fast discharge process to the completed charging of reset circuit, avoid judging circuit differentiates cycle erroneous judgement at next.
Comprehensive the various embodiments described above, reset circuit disclosed in the present application, its concrete circuit structure as shown in Figure 7.
Present embodiment discloses a kind of WiFi communication system, its structural representation as shown in Figure 8, comprising:
WiFi communication module 81, the reset circuit 82 be connected with WiFi communication module 81.
Wherein, reset circuit 82 comprises: the testing circuit be connected with the state end of WiFi communication module 81, the delay circuit be connected with testing circuit, the judging circuit be connected with delay circuit, the reseting switch circuit be connected respectively with the reset terminal of judging circuit and WiFi communication module 81, the quick discharging circuit be connected respectively with the state end of judging circuit, WiFi communication module 81 and the reset terminal of WiFi communication module 81.
The level signal that the state end that testing circuit receives WiFi communication module exports, and level signal is detected, judge that this level signal is high level or low level, thus realize the detection to WiFi communication module work state.
Level signal after delay circuit receiving test circuit detects, and after delay predetermined time, output signal.After delay circuit delay predetermined time, then export signal, when being to judge the level signal received, normal signal or abnormal signal, namely judge that the operating state of WiFi communication module is normal or abnormal.
Preferably, in scheme disclosed in the present embodiment, the scheduled time can be 6s, namely after delay circuit time delay 6s, exports signal to judging circuit.
The signal that judging circuit reception delay circuit exports, judge whether this signal reaches pre-conditioned, if, then this signal is sent to reseting switch circuit, reseting switch circuit sends the reset terminal of reset signal to WiFi communication module, control the reset of WiFi communication module, make its operating state recover normal; If this signal does not reach predetermined condition, then this signal is sent to quick discharging circuit, carries out repid discharge, to ensure that judging circuit can accurately judge in next differentiation cycle.
That is, when the level signal that the state end of WiFi communication module exports is low level, show that the operating state of WiFi communication module is normal, now the reset terminal of WiFi communication module exports high level; When the level signal that the state end of WiFi communication module exports is high level, judge the time that this high level continues, if the duration is within 6s, then reset circuit does not export pulse, namely shows that WiFi communication module recovers normal automatically; When the level signal that the state end of WiFi communication module exports is high level, judge the time that this high level continues, if the duration is more than 6s, then reset circuit exports the low level pulse of 200 milliseconds, make WiFi communication module after the low level pulse receiving reset circuit output, reset, WiFi communication module recovery is normally worked.
WiFi communication system disclosed in the present embodiment, comprise WiFi communication module and reset circuit, reset circuit is connected with the state end of WiFi communication module by one end of testing circuit, the other end is connected with delay circuit, delay circuit is connected with one end of judging circuit, the other end of judging circuit is connected with one end of reseting switch circuit and one end of quick discharging circuit respectively, the other end of reseting switch circuit is connected with the reset terminal of WiFi communication module, and the other end of quick discharging circuit is connected with the state end of WiFi communication module.This programme is by the concrete connection of above-mentioned each circuit, achieve by hardware circuit to the detection of WiFi communication module work state and occur abnormal time, to the reset of WiFi communication module, avoid and adopt the detection of software simulating operating state and the reset of state, avoid the R&D costs using software to bring high, be unfavorable for the problem extensively promoted.
Preferably, disclosed in the present embodiment, delay circuit comprises: the 3rd resistance, the 4th resistance, first have polar capacitor, and its concrete circuit structure as shown in Figure 3, does not repeat them here.
Disclosed in the present embodiment, reseting switch circuit comprises: the second NPN type triode, the 16 resistance, the 17 resistance, the 18 resistance, the 3rd electric capacity, and its concrete circuit structure as shown in Figure 5, does not repeat them here.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a reset circuit, is characterized in that, comprising:
The testing circuit be connected with the state end of WiFi communication module, the delay circuit be connected with described testing circuit, the judging circuit be connected with described delay circuit, the reseting switch circuit be connected respectively with the reset terminal of described judging circuit and WiFi communication module, the quick discharging circuit be connected respectively with the state end of described judging circuit, WiFi communication module and the reset terminal of WiFi communication module
The level signal that the state end that described testing circuit receives described WiFi communication module exports, and described level signal is detected;
Level signal after described delay circuit receiving test circuit detects, and after delay predetermined time, output signal;
Described judging circuit receives the signal that described delay circuit exports, judge whether described signal reaches pre-conditioned, if, then described signal is sent to described reseting switch circuit, described reseting switch circuit sends the reset terminal of reset signal to described WiFi communication module, controls WiFi communication module resets; If not, then described signal is sent to described quick discharging circuit, carries out repid discharge.
2. reset circuit according to claim 1, is characterized in that, described testing circuit comprises: the first resistance, the second resistance, the 3rd resistance, the first PNP type triode,
One end of described first resistance is connected with the state end of WiFi communication module, the other end is connected with the base stage of the first PNP type triode, the base stage of described first PNP type triode is connected with power supply by described second resistance, the grounded collector of described first PNP type triode, the emitter of described first PNP type triode is connected with power supply by described 3rd resistance, and the emitter of described first PNP type triode is connected with described delay circuit.
3. reset circuit according to claim 1, is characterized in that, described delay circuit comprises: the 3rd resistance, the 4th resistance, first have polar capacitor,
While one end of described 4th resistance is connected with described testing circuit, power supply is connected by described 3rd resistance, the other end of described 4th resistance has the positive pole of polar capacitor to be connected with described first, described first has the positive pole of polar capacitor to be connected with described judging circuit, the described first minus earth having a polar capacitor.
4. reset circuit according to claim 1, it is characterized in that, described judging circuit comprises: the first comparator, the second comparator, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, second have polar capacitor
The in-phase input end of described first comparator is connected with described delay circuit, inverting input is by while described tenth grounding through resistance, power supply is connected by the 11 resistance, while output is connected with described reseting switch circuit, power supply is connected by the 15 resistance, be connected with the output of the second comparator simultaneously, while the inverting input of described second comparator is connected with the normal phase input end of described first comparator, the positive pole of polar capacitor is had to be connected by described 12 resistance with described second, described second have the minus earth of polar capacitor while, be connected with the in-phase input end of described second comparator by described 13 resistance, the in-phase input end of described second comparator connects power supply by described 14 resistance, described second has the positive pole of polar capacitor to be connected with described quick discharging circuit.
5. reset circuit according to claim 1, is characterized in that, described reseting switch circuit comprises: the second NPN type triode, the 16 resistance, the 17 resistance, the 18 resistance, the 3rd electric capacity,
The base stage of described second NPN type triode is connected with described judging circuit by described 16 resistance, while the grounded emitter of described second NPN type triode, be connected with the reset terminal of WiFi communication module by described 3rd electric capacity, the collector electrode of described second NPN type triode is connected by the reset terminal of the 18 resistance with described WiFi communication module while being connected with power supply by the 17 resistance.
6. reset circuit according to claim 1, it is characterized in that, described quick discharging circuit comprises: the first PNP type triode, the 3rd comparator, the 4th comparator, the first diode, the second diode, the 3rd diode, first have polar capacitor, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance
The inverting input of described 4th comparator is connected with described judging circuit, normal phase input end is successively by described 5th resistance, 3rd diode, while first diode is connected with power supply, be connected by the output of the 6th resistance with described 4th comparator, the output of described 4th comparator is connected with the normal phase input end of described 3rd comparator, while the inverting input of described 3rd comparator is connected with power supply by the 7th resistance, by the 8th grounding through resistance, while the output of described 3rd comparator is connected with the emitter of the first PNP type triode, successively by the second diode, 9th resistance, first has polar capacitor ground connection.
7. reset circuit according to claim 1, is characterized in that, the scheduled time of described delay circuit time delay is specially: 6s.
8. a WiFi communication system, is characterized in that, comprising: WiFi communication module, the reset circuit be connected with described WiFi communication module,
Described reset circuit comprises: the testing circuit be connected with the state end of WiFi communication module, the delay circuit be connected with described testing circuit, the judging circuit be connected with described delay circuit, the reseting switch circuit be connected respectively with the reset terminal of described judging circuit and WiFi communication module, the quick discharging circuit be connected respectively with the state end of described judging circuit, WiFi communication module and the reset terminal of WiFi communication module
The level signal that the state end that described testing circuit receives described WiFi communication module exports, and described level signal is detected;
Level signal after described delay circuit receiving test circuit detects, and after delay predetermined time, output signal;
Described judging circuit receives the signal that described delay circuit exports, judge whether described signal reaches pre-conditioned, if, then described signal is sent to described reseting switch circuit, described reseting switch circuit sends the reset terminal of reset signal to described WiFi communication module, controls WiFi communication module resets; If not, then described signal is sent to described quick discharging circuit, carries out repid discharge.
9. system according to claim 8, is characterized in that, described delay circuit comprises: the 3rd resistance, the 4th resistance, first have polar capacitor,
While one end of described 4th resistance is connected with described testing circuit, power supply is connected by described 3rd resistance, the other end of described 4th resistance has the positive pole of polar capacitor to be connected with described first, described first has the positive pole of polar capacitor to be connected with described judging circuit, the described first minus earth having a polar capacitor.
10. system according to claim 8, is characterized in that, described reseting switch circuit comprises: the second NPN type triode, the 16 resistance, the 17 resistance, the 18 resistance, the 3rd electric capacity,
The base stage of described second NPN type triode is connected with described judging circuit by described 16 resistance, while the grounded emitter of described second NPN type triode, be connected with the reset terminal of WiFi communication module by described 3rd electric capacity, the collector electrode of described second NPN type triode is connected by the reset terminal of the 18 resistance with described WiFi communication module while being connected with power supply by the 17 resistance.
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| CN113915942A (en) * | 2021-05-08 | 2022-01-11 | 海信（山东）冰箱有限公司 | Refrigerator and WiFi module working state detection method |
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| CN114362555A (en) * | 2021-12-28 | 2022-04-15 | 核工业西南物理研究院 | Power module with multi-functional selection |
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| CN104539274B (en) | 2017-12-05 |
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