CN104516296B - A kind of awakening method and peripheral module of the micro controller system based on peripheral module - Google Patents
A kind of awakening method and peripheral module of the micro controller system based on peripheral module Download PDFInfo
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- CN104516296B CN104516296B CN201410828154.XA CN201410828154A CN104516296B CN 104516296 B CN104516296 B CN 104516296B CN 201410828154 A CN201410828154 A CN 201410828154A CN 104516296 B CN104516296 B CN 104516296B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
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Abstract
The invention discloses a kind of awakening method and peripheral module of the micro controller system based on peripheral module, the method includes：Under low-power consumption mode, whether the signal for judging peripheral bus transmission is useful signal, if the signal of peripheral bus transmission is useful signal, door control clock circuit is opened, to produce low-frequency clock signal；Current demand signal is received, and the current demand signal is detected, if it is the useful signal for being sent to the peripheral module to detect the current demand signal, perform next step；Judge whether the current demand signal meets wake-up condition, if the current demand signal meets the wake-up condition, produce wake-up interrupts, wake up micro controller system.The awakening method and peripheral module of the micro controller system based on peripheral module of the present invention are only when the signal of peripheral hardware bus transfer is useful signal, door control clock circuit can just be opened, to produce low-frequency clock signal, remaining period clock is completely closed so that system reaches lower power consumption.
Description
Technical field
The present invention relates to electronic circuit technology field, more particularly to a kind of micro controller system based on peripheral module is called out
Awake method and peripheral module.
Background technology
Power consumption is a major issue for care to micro controller system in the application.Generally user in use, is
The power consumption of the system of reduction, by system configuration and can complete to make it into low-power consumption mode after sending function, and low-power consumption mould
It is minimum that formula can allow system power dissipation to reach by closing the means of clock.Under low-power consumption mode, if peripheral bus are in work,
So being possible to the wake-up micro controller system of mistake makes it exit low-power consumption mode or loses the number for being sent to the equipment
According to.
In recent years, with the extensive application of Mobile portable equipment, the stand-by power consumption of equipment how is reduced as far as possible always
The direction that Shi Ge manufacturers are pursued.Under standby low-power consumption mode, the clock of most of function is at closed mode, really
This can bring lower power consumption, but if indiscriminate clock of being closed under low-power consumption mode is to reduce power consumption, then having can
The valid data information of peripheral bus can be missed, causes receive capabilities exception.When but equipment is as passive accepting device,
It is unknown because when peripheral bus send valid data content, taking the mode of normally opened clock can no doubt have correctly received
Data, but power consumption can increase a lot.
The mode that micro controller system is waken up under low-power consumption mode is varied, but is mostly the level based on external signal
Or the circuit of edge change, once detecting useful signal, system will be waken up.The method of this wake-up system has in bus
The arousal function of mistake is frequently can lead to when interference or non-equipment of target device, allows system to be in the fortune of higher power dissipation
Row state, the equipment connection mode generally for bus-type topology mode is the most obvious.
The content of the invention
Awakening method and peripheral hardware mould it is an object of the invention to propose a kind of micro controller system based on peripheral module
Block, the awakening method can solve the problem that the wake-up that can cause mistake in existing awakening technology makes system be in the operation shape of higher power dissipation
The problem of state.
It is that, up to this purpose, the present invention uses following technical scheme：
In a first aspect, the invention discloses a kind of awakening method of the micro controller system based on peripheral module, including：
Under low-power consumption mode, whether the signal for judging peripheral bus transmission is useful signal, if the peripheral bus
The signal of transmission is useful signal, then open door control clock circuit, to produce low-frequency clock signal；
Current demand signal is received, and the current demand signal is detected, if detecting the current demand signal to be sent to
The useful signal of the peripheral module, then perform next step；
Judge whether the current demand signal meets wake-up condition, if the current demand signal meets the wake-up condition,
Wake-up interrupts are produced, micro controller system is waken up.
Further, also include：
If detecting the current demand signal to be invalid crosstalk signal or be not sent to effective letter of the peripheral module
Number, then close the door control clock circuit.
Further, it is described under low-power consumption mode, before whether the signal for judging peripheral bus transmission is useful signal,
Methods described also includes：
Under system running pattern, judge whether to receive the instruction into the low-power consumption mode；If so, then closing institute
Low-frequency clock signal is stated, if it is not, then continuing system running pattern.
Second aspect, the invention discloses a kind of peripheral module, the peripheral module can be realized any of the above-described described
Awakening method, including：
Significant level circuit for detecting, door control clock circuit, signal deteching circuit and wake-up decision circuitry,
The significant level circuit for detecting is connected with the door control clock circuit, the signal deteching circuit and the wake-up
Decision circuitry is connected；
Whether the significant level circuit for detecting is used under low-power consumption mode, judge the signal of peripheral bus transmission and have
Effect signal, if the signal of peripheral bus transmission is useful signal, opens door control clock circuit, to produce low-frequency clock
Signal；
The signal deteching circuit is used to receive current demand signal, and the current demand signal is detected, if detected
The current demand signal is the useful signal for being sent to the peripheral module, then the current demand signal is input into described wake-up judges electricity
Lu Zhong；
The wake-up decision circuitry is used to judge whether the current demand signal meets wake-up condition, if the current demand signal
Meet the wake-up condition, then produce wake-up interrupts, wake up micro controller system.
Further, the signal deteching circuit is connected with the significant level circuit for detecting；
If the signal deteching circuit is additionally operable to detect the current demand signal and being invalid crosstalk signal or not sending out
The useful signal of the peripheral module is given, the significant level circuit for detecting is notified, the door control clock circuit is closed.
Further, the significant level circuit for detecting includes the first trigger, three inputs and door, the first phase inverter and the
Two phase inverters, first trigger includes the first set end, the first clock end, the first triggering end, the first reset terminal and first
Output end,
First set end is connected with described three inputs with the output end of door, three inputs of three input and door
The peripheral module in connection system enables the output of the low-power consumption mode circuit and first phase inverter in circuit, system respectively
End, the input of first phase inverter connects the peripheral bus；
The first clock end is connected with the low consumption circuit of the low-frequency clock signal is produced in system；
First triggering end is connected with the output end of second phase inverter, the input connection of second phase inverter
The signal deteching circuit；
First reset terminal enables circuit and is connected with the peripheral module；
First output end is connected with the door control clock circuit.
Further, the door control clock circuit includes the second trigger, the first OR gate and first and door, and described second touches
Hair device includes second clock end, the second triggering end and the second output end,
The second clock end with system be used for produce the low consumption circuit of the low-frequency clock signal to be connected；
Second triggering end is connected with the output end of first OR gate, the first input end of first OR gate and institute
The connection of significant level circuit for detecting is stated, the second input and the clock in system of first OR gate enable control circuit company
Connect；
Second output end is connected with described first with the first input end of door, described first with the second input of door
It is connected with the low consumption circuit；Described first is connected with the output end of door with the low consumption circuit.
The awakening method and peripheral module of the micro controller system based on peripheral module of the present invention are only in peripheral hardware
When the signal of bus transfer is useful signal, door control clock circuit can be just opened, to produce low-frequency clock signal so that system reaches
To lower power consumption.
Brief description of the drawings
In order to clearly illustrate the technical scheme of exemplary embodiment of the present, below to needed for description embodiment
The accompanying drawing to be used does a simple introduction.Obviously, the accompanying drawing introduced is a part of embodiment to be described of the invention
Accompanying drawing, rather than whole accompanying drawings, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
Other accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is the flow of the awakening method of the micro controller system based on peripheral module that the embodiment of the present invention one is provided
Figure.
Fig. 2 is the structure chart of the peripheral module that the embodiment of the present invention two is provided.
Fig. 3 is the structure chart of the significant level circuit for detecting of the peripheral module that the embodiment of the present invention two is provided.
Fig. 4 is the structure chart of the door control clock circuit of the peripheral module that the embodiment of the present invention two is provided.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below with reference to the embodiment of the present invention in it is attached
Figure, by specific embodiment, is fully described by technical scheme.Obviously, described embodiment is of the invention
A part of embodiment, rather than whole embodiments, based on embodiments of the invention, those of ordinary skill in the art are not doing
The every other embodiment obtained on the premise of going out creative work, each falls within protection scope of the present invention.
Embodiment one：
Fig. 1 is the flow of the awakening method of the micro controller system based on peripheral module that the embodiment of the present invention one is provided
Figure.As shown in figure 1, the awakening method includes：
Step 101, under low-power consumption mode, judge peripheral bus transmission signal whether be useful signal, if peripheral hardware
The signal of bus transfer is useful signal, then perform following steps：
In this step, the signal to peripheral hardware bus transfer judges in real time.Judging the signal of peripheral bus transmission
During whether being useful signal, it is not necessary to use low-frequency clock signal.
Step 102, opening door control clock circuit, to produce low-frequency clock signal.
In this step, low-frequency clock signal is produced, so that current demand signal can be received.
Step 103, reception current demand signal.
In this step, the corresponding current demand signal of useful signal of peripheral bus transmission is received.
Step 104, current demand signal is detected.If it is be sent to the peripheral module effective to detect current demand signal
Signal, then perform following steps：
Step 105, judge whether current demand signal meets wake-up condition.If current demand signal meets wake-up condition, perform
Step 106, generation wake-up interrupts, wake up micro controller system.
Preferably, it is further comprising the steps of：
If detecting current demand signal to be invalid crosstalk signal or be not sent to the useful signal of the peripheral module,
Perform step 115, close door control clock circuit.
In this step, door control clock circuit is closed, so that low-frequency clock signal is closed.This causes realizing wake-up
While function, the stand-by power consumption of micro controller system is reduced as much as possible.
Preferably, it is further comprising the steps of：
If the signal of peripheral bus transmission is not useful signal, step 141, system operation low-power consumption mode are performed.
In this step, under low-power consumption mode, if the signal of peripheral bus transmission is not useful signal, system continues
Operation low-power consumption mode.
Preferably, it is further comprising the steps of before step 141, system operation low-power consumption mode：
Step 111, under system running pattern, judge whether to receive the instruction into low-power consumption mode.If it is,
Perform step 121, close low-frequency clock signal；If it is not, then performing step 131, continuing system running pattern.
In this step, after entering low-power consumption mode, whether the signal for judging peripheral bus transmission is useful signal mistake
Journey need not use low-frequency clock signal.So the closing low-frequency clock signal in a flash before system enters low-power consumption mode,
System power dissipation is reduced as much as possible.
Preferably, high frequency clock signal can also be closed in addition to closing low-frequency clock signal in step 121.
The awakening method of the micro controller system based on peripheral module that the embodiment of the present invention one is provided is total only in peripheral hardware
When the signal of line transmission is useful signal, door control clock circuit can be just opened, to produce low-frequency clock signal so that system reaches
Lower power consumption.
Embodiment two：
Fig. 2 is the structure chart of the peripheral module that the embodiment of the present invention two is provided.The peripheral hardware mould that the embodiment of the present invention two is provided
Block can realize the awakening method described in the embodiment of the present invention one.As shown in Fig. 2 the peripheral module includes：Significant level is detected
Circuit 201, door control clock circuit 202, signal deteching circuit 203 and wake-up decision circuitry 204, significant level circuit for detecting 201
It is connected with door control clock circuit 202, signal deteching circuit 203 is connected with decision circuitry 204 is waken up.
Significant level circuit for detecting 201 be used under low-power consumption mode, judge peripheral bus 205 transmit signal whether be
Useful signal, if the signal of peripheral bus transmission is useful signal, opens door control clock circuit 202, to produce during low frequency
Clock signal.
In the present embodiment, after system enters low-power consumption mode, significant level circuit for detecting 201 is started working, and works as peripheral hardware
When the signal of the transmission of bus 205 is useful signal, significant level circuit for detecting 201 enables low-power consumption mode clock signal asynchronous
1 is put, and sends door control clock circuit 202 to, the low consumption circuit 206 that door control clock circuit 202 now can be in control system will
Low-frequency clock signal is enabled, by clock signal so that signal deteching circuit 203 enters running status.It is due to what is now opened
Low-frequency clock signal, correspondingly produces the power consumption of the low consumption circuit 206 of low-frequency clock signal relatively low, therefore, the present embodiment two is carried
Power consumption of the peripheral module of confession during wake-up system is relatively low.When the signal of the transmission of peripheral bus 205 is not useful signal
When, low-frequency clock signal is still in closed mode.Significant level circuit for detecting 201 is judging the signal of the transmission of peripheral bus 205
During whether being useful signal, it is not necessary to low-frequency clock circuit.
In the present embodiment, under the normal mode of operation of system, i.e. system running pattern, the low consumption circuit in system
206 and the equal normal work of high power consumption circuit 207, correspondingly, low-frequency clock signal and high frequency clock signal are in the shape opened
State, now significant level circuit for detecting 201 only controlled by the low-power consumption mode circuit 208 in system, do not work now, low-power consumption
Mode clock enables invalidating signal.Door control clock circuit 202 only be subject to system in clock enable control circuit 209 produce when
Clock enables control signal control.System enter low-power consumption mode before in a flash by low-frequency clock signal and high frequency clock signal
Close.
Signal deteching circuit 203 is used to receive current demand signal, and current demand signal is detected, if detecting current letter
Number it is to be sent to the useful signal of the peripheral module, then current demand signal is input in wake-up decision circuitry 204.
Waking up decision circuitry 204 is used to judge whether current demand signal meets wake-up condition, if current demand signal meets wake-up
Condition, then produce wake-up interrupts, wakes up micro controller system.
In the present embodiment, if current demand signal meets wake-up condition, then waking up decision circuitry 204 can will wake up low-power consumption
Mode signal puts 1, and sends the system wake-up circuit 210 in system to, system is exited low-power consumption mode and returns to normal work
Pattern, i.e. system running pattern.
Preferably, signal deteching circuit 203 is connected with significant level circuit for detecting 201.
If signal deteching circuit 203 is additionally operable to detect current demand signal and being invalid crosstalk signal or being not sent to this
The useful signal of peripheral module, notifies significant level circuit for detecting 201, closes door control clock circuit 202.
In the present embodiment, if being currently an invalid crosstalk signal or to be not sent to having for the peripheral module
Low-power consumption mode clock can be removed enable signal and put by effect signal, signal deteching circuit 203 under the driving of low-frequency clock signal
1, after level circuit for detecting 201 receives this low-power consumption mode clock removing enable signal, low-power consumption mode clock will be made
Can signal synchronously clear 0, finally cause that door control clock circuit is closed, and then control low consumption circuit 206 to close low-frequency clock signal,
So that system returns to low-power consumption mode, this causes that the power consumption of system is preferably minimized；If current demand signal is destined to the peripheral hardware mould
The useful signal of block, then can remove enable signal and put by signal deteching circuit 203 after above-mentioned flow by low-power consumption mode clock
0, such low-frequency clock signal would not be closed and the signal of the peripheral module is sent on peripheral bus 206 will be by just
Often receive, this ensure that the reception of signal, will not cause loss of data.
Fig. 3 is the structure chart of the significant level circuit for detecting of the peripheral module that the embodiment of the present invention two is provided.Preferably, such as
Shown in Fig. 3, significant level circuit for detecting 201 includes the input of the first trigger 211, three and door 221, the first phase inverter 231 and the
Two phase inverters 241, first trigger 211 include the first set end Set1, the first clock end Clk1, the first triggering end D1,
First reset terminal Reset1 and the first output end Q1.
First set end Set1 is connected with three inputs with the output end of door 221, and three inputs divide with three inputs of door 221
Peripheral module in other connection system enables the phase inverter 231 of low-power consumption mode circuit 208 and first in circuit 301, system
Output end, the input connection peripheral bus 205 of the first phase inverter 231.
First clock end Clk1 is connected with the low consumption circuit 206 of low-frequency clock signal is produced in system.
First triggering end D1 is connected with the output end of the second phase inverter 241, the input connection signal of the second phase inverter 241
Detection circuit 203.
First reset terminal Reset1 enables circuit 301 and is connected with peripheral module.
First output end Q1 is connected with door control clock circuit 202.
In the present embodiment, after peripheral module is enabled and enters low-power consumption mode, low-frequency clock signal is closed.When peripheral hardware is total
The signal of the transmission of line 205 puts 1 for after low level signal, the first output end Q1 of the first trigger 211 is asynchronous, and when causing gate
Clock circuit 202 enables low-frequency clock signal, and the first trigger 211 enters synchronous driving condition.Low-power consumption mode clock is removed to be made
Can the system reset default value of signal be 0, therefore the first trigger synchronous set the first triggering end D1 ends and asynchronous set the
One set end Set1 ends are 1, will not form competition.
Fig. 4 is the structure chart of the door control clock circuit of the peripheral module that the embodiment of the present invention two is provided.As shown in figure 4, door
Control clock circuit 202 includes the second trigger 212, the first OR gate 222 and first and door 232, and second trigger 212 includes
Second clock end Clk2, the second triggering end D2 and the second output end Q2,
Second clock end Clk2 with system be used for produce the low consumption circuit 206 of low-frequency clock signal to be connected.
Second triggering end D2 is connected with the output end of the first OR gate 222, first input end and effective electricity of the first OR gate 222
Flat circuit for detecting 201 is connected, and the second input of the first OR gate 222 enables control circuit 209 and is connected with the clock in system.
Second output end Q2 is connected with first with the first input end of door 232, first with the second input of door 232 with it is low
Power digital circuit 206 is connected；First is connected with the output end of door 232 with low consumption circuit 206.
In the present embodiment, under normal mode of operation, i.e. system running pattern, the clock of peripheral module enables control to system
Signal is effective, the low consumption circuit 206 that the meeting output low frequency clock of door control clock circuit 202 comes in drive system.When system and outward
If module enters after low-power consumption mode, clock enable control signal is invalid, now during the output low frequency of door control clock circuit 202
Whether clock is only dependent upon low-power consumption mode clock and enables signal.
The embodiment of the present invention two provide peripheral module only when the signal of peripheral hardware bus transfer is useful signal, just meeting
Door control clock circuit is opened, to produce low-frequency clock signal so that system reaches lower power consumption.When the device network of bus-type
In when being made up of many peripheral modules, it is not to access that the peripheral module of the message reference of peripheral bus transmission just has bigger probability
The peripheral module, is exactly invalid signals, the peripheral hardware that the embodiment of the present invention two is provided on peripheral bus for the peripheral module
Power consumption can be lower when module wakes up micro controller system in this environment.
Above are only presently preferred embodiments of the present invention and the know-why used.The invention is not restricted to spy described here
Determine embodiment, the various significant changes that can carry out for a person skilled in the art, readjust and substitute all without departing from
Protection scope of the present invention.Therefore, although the present invention is described in further detail by above example, but this hair
It is bright to be not limited only to above example, without departing from the inventive concept, more other equivalence enforcements can also be included
Example, and the scope of the present invention is determined by the scope of claim.
Claims (7)
1. a kind of awakening method of the micro controller system based on peripheral module, it is characterised in that including：
Under low-power consumption mode, whether the signal for judging peripheral bus transmission is useful signal, it is not necessary to believed using low-frequency clock
Number, if the signal of peripheral bus transmission is useful signal, door control clock circuit is opened, to produce low-frequency clock to believe
Number；
The signal of peripheral bus transmission is received, and the signal that the peripheral bus are transmitted is detected, if detected described
The signal of peripheral bus transmission is the useful signal for being sent to the peripheral module, then perform next step；
Judge whether the signal of the peripheral bus transmission meets wake-up condition, if the signal of peripheral bus transmission meets
The wake-up condition, then produce wake-up interrupts, wakes up micro controller system.
2. awakening method according to claim 1, it is characterised in that also include：
If the signal for detecting peripheral bus transmission is invalid crosstalk signal or is not sent to the peripheral module
Useful signal, then close the door control clock circuit.
3. awakening method according to claim 1 and 2, it is characterised in that described under low-power consumption mode, judges that peripheral hardware is total
Before whether the signal of line transmission is useful signal, methods described also includes：
Under system running pattern, judge whether to receive the instruction into the low-power consumption mode；If so, then closing described low
Frequency clock signal, if it is not, then continuing system running pattern.
4. a kind of peripheral module, the peripheral module can realize any described awakening methods of claim 1-3, and its feature exists
In, including：
Significant level circuit for detecting, door control clock circuit, signal deteching circuit and wake-up decision circuitry,
The significant level circuit for detecting is connected with the door control clock circuit, and the signal deteching circuit judges with described wake-up
Circuit is connected；
The significant level circuit for detecting is used under low-power consumption mode, and whether the signal for judging peripheral bus transmission is effectively to believe
Number, if the signal of peripheral bus transmission is useful signal, door control clock circuit is opened, to produce low-frequency clock to believe
Number；
The signal deteching circuit is used to receive the signal of peripheral bus transmission, and the signal that the peripheral bus are transmitted is carried out
Detection, if the signal for detecting the peripheral bus transmission is the useful signal for being sent to the peripheral module, will be described outer
If the signal input of bus transfer to it is described wake-up decision circuitry in；
The decision circuitry that wakes up is used to judge whether the signal of the peripheral bus transmission meets wake-up condition, if described outer
If the signal of bus transfer meets the wake-up condition, then wake-up interrupts are produced, wake up micro controller system.
5. peripheral module according to claim 4, it is characterised in that the signal deteching circuit is detectd with the significant level
Slowdown monitoring circuit is connected；
If the signal that the signal deteching circuit is additionally operable to detect the peripheral bus transmission be invalid crosstalk signal or
The useful signal of the peripheral module is not sent to, the significant level circuit for detecting is notified, the door control clock circuit is closed.
6. peripheral module according to claim 5, it is characterised in that the significant level circuit for detecting includes the first triggering
Device, three input with door, the first phase inverter and the second phase inverter, first trigger include the first set end, the first clock end,
First triggering end, the first reset terminal and the first output end,
First set end is connected with described three inputs with the output end of door, and three input is distinguished with three inputs of door
Peripheral module in connection system enables the output end of the low-power consumption mode circuit and first phase inverter in circuit, system,
The input of first phase inverter connects the peripheral bus；
The first clock end is connected with the low consumption circuit of the low-frequency clock signal is produced in system；
First triggering end is connected with the output end of second phase inverter, and the input connection of second phase inverter is described
Signal deteching circuit；
First reset terminal enables circuit and is connected with the peripheral module；
First output end is connected with the door control clock circuit.
7. peripheral module according to claim 5, it is characterised in that the door control clock circuit include the second trigger,
First OR gate and first and door, second trigger include second clock end, the second triggering end and the second output end,
The second clock end with system be used for produce the low consumption circuit of the low-frequency clock signal to be connected；
Second triggering end is connected with the output end of first OR gate, and the first input end of first OR gate has with described
Effect level circuit for detecting connection, the second input of first OR gate enables control circuit and is connected with the clock in system；
Second output end is connected with described first with the first input end of door, the described first the second input and institute with door
State low consumption circuit connection；Described first is connected with the output end of door with the low consumption circuit.
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