CN104597790B - A kind of awakening method of serial ports controller and micro controller system based on it - Google Patents
A kind of awakening method of serial ports controller and micro controller system based on it Download PDFInfo
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- CN104597790B CN104597790B CN201410830132.7A CN201410830132A CN104597790B CN 104597790 B CN104597790 B CN 104597790B CN 201410830132 A CN201410830132 A CN 201410830132A CN 104597790 B CN104597790 B CN 104597790B
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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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Abstract
The invention discloses a kind of serial ports controller and the micro controller system based on it awakening method, the awakening method includes：Under low-power consumption mode, judge whether to detect frame beginning label, if detecting the frame beginning label, open clock switch circuit, to produce serial ports work clock；Receive current data frame；Judge whether the current data frame matches with wake-up association, if the current data frame is matched with the wake-up association, produce wake-up interrupts, wake up micro controller system.The awakening method of a kind of serial ports controller and the micro controller system based on it of the present invention just opens clock switch circuit only when detecting frame beginning label, to produce serial ports work clock, reduces the system power dissipation under low-power consumption mode.
Description
Technical field
The present invention relates to electronic circuit technology field, more particularly to a kind of serial ports controller and the microcontroller system based on it
The awakening method of system.
Background technology
In microcontroller (MCU, Micro Control Unit) chip system, in order to reduce stand-by power consumption, chip leads to
Often all possess one or more low-power consumption modes.Chip is after low-power consumption mode is entered, and most clocks of chip internal are all
It can be closed, central processing unit (CPU, Central Processing Unit) can not continue executing with software instruction, it is necessary to close
Suitable opportunity wakes up chip, chip is returned to normal working condition.
Existing awakening technology mainly has CPU to interrupt wake-up and peripheral hardware wake-up.
CPU, which is interrupted, to be waken up mainly using arousal function integrated in CPU module.Under low-power consumption mode, when CPU use
When a pulse or high level are received on the pin of wake-up, CPU will start to perform wake up procedure, by system wake-up.CPU
It is that wake-up mode is relatively simple to interrupt the shortcoming waken up.
Peripheral hardware wakes up mainly to be waken up using peripheral module integrated in system.Existing peripheral hardware wake-up mode is basic
On be required under low-power consumption mode keep peripheral clock open, cause the system power dissipation under low-power consumption mode larger.
The content of the invention
, should it is an object of the invention to propose the awakening method of a kind of serial ports controller and micro controller system based on it
Awakening method can solve the problem that the problem of system power dissipation is larger in existing awakening technology.
For 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 serial ports controller, including：
Under low-power consumption mode, judge whether to detect frame beginning label, if detecting the frame beginning label, beat
Clock switch circuit is opened, to produce serial ports work clock；
Receive current data frame；
Judge whether the current data frame matches with wake-up association, if the current data frame and the wake-up association
Match somebody with somebody, then produce wake-up interrupts, wake up micro controller system.
Further, in addition to：
If the current data frame is mismatched with the wake-up association, clock switch circuit is closed.
Further, it is described under low-power consumption mode, judge whether to detect before frame beginning label, methods described is also wrapped
Include：
Under system running pattern, judge whether to receive the instruction into the low-power consumption mode；If so, when then closing
Clock generation circuit, if it is not, then continuing system running pattern.
Further, it is described under system running pattern, judge whether to receive the instruction into the low-power consumption mode
Before, methods described also includes：
Under system running pattern, the content of the wake-up association is configured by system bus.
Second aspect, the invention discloses a kind of serial ports controller, the serial ports controller can realize any of the above-described institute
The awakening method stated, including：
Configuration register, frame start detection circuit, data frame receipt circuit, receiving frame content analysis circuit and clock switch
Circuit,
The frame start detection circuit be connected with the clock switch circuit, the receiving frame content analysis circuit respectively with
The configuration register and data frame receipt circuit connection；
The configuration register is used to store wake-up association；
The frame, which starts detection circuit, to be used under low-power consumption mode, judges whether to detect frame beginning label, if inspection
The frame beginning label is measured, then opens clock switch circuit, to produce serial ports work clock；
The data frame receipt circuit is used to receive current data frame；
The receiving frame content analysis circuit is used to judge whether the current data frame matches with the wake-up association, if
The current data frame is matched with the wake-up association, then produces wake-up interrupts, wakes up micro controller system.
Further, the receiving frame content analysis circuit is connected with the clock switch circuit；
Mismatch, close with the wake-up association if the receiving frame content analysis circuit is additionally operable to the current data frame
Close the clock switch circuit.
Further, the configuration register is also connected with the system bus in micro controller system, in system operation mould
Under formula, the wake-up association is configured by the system bus.
Further, it is CK types edge detection circuit that the frame, which starts detection circuit,.
Further, the clock switch circuit include the first trigger, the second trigger, phase inverter and with door, it is described
First trigger is used to start the frame to detect that the pulse signal that circuit is produced enters line broadening and synchronization, second trigger
For producing the clock switch that the control clock generation circuit is opened or closed, wherein, first trigger includes first
Set end, the first clock end, the first triggering end and the first output end, when second trigger includes the second set end, second
Zhong Duan, the second triggering end and the second output end,
First set end starts detection circuit with the frame and is connected, and the first clock end produces electricity with the clock
The output end on road is connected, and first triggering end is used to receive a low potential, first output end and second set end
It is connected；
The second clock end is connected with the output end of the clock generation circuit, second triggering end and described and door
Output end be connected, second output end is connected with the input of the clock generation circuit；
The input of the phase inverter is connected with the output end of the receiving frame content analysis circuit, the phase inverter it is defeated
Go out end with described with the first input end of door to be connected, it is described to be connected with the second input of door with second output end.
Further, when the clock generation circuit controls the serial ports work clock to close, and when the frame starts
When detecting electric circuit inspection to frame beginning label, first trigger and the second trigger set are controlled, described second is defeated
The clock switch for going out end output is opened, so as to control the clock generation circuit to produce serial ports work clock；When clock production
When raw circuit produces serial ports work clock, if the receiving frame content analysis circuit judges that the current data frame is called out with described
Frame of waking up is mismatched, then the receiving frame content analysis circuit output high potential so that the clock of the second trigger output is opened
Close, so as to control the clock generation circuit to close the serial ports work clock.
Further, in addition to：
Data frame transtation mission circuit, the data frame transtation mission circuit is connected with the configuration register, is posted for send configuration
The data frame stored in storage；
The data frame receipt circuit is connected with the configuration register, described for the data frame received to be sent to
In configuration register.
The awakening method of serial ports controller of the present invention and micro controller system based on it is only detecting frame
Clock switch circuit is just opened during beginning label, to produce serial ports work clock, the system power dissipation under low-power consumption mode is reduced.
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 of the invention to be described
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
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the flow of the awakening method for the micro controller system based on serial ports controller that the embodiment of the present invention one is provided
Figure.
Fig. 2 is the structure chart for the serial ports controller that the embodiment of the present invention two is provided.
Fig. 3 is the structure chart of the clock switch circuit for the serial ports controller that the embodiment of the present invention two is provided.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below with reference to attached in the embodiment of the present invention
Figure, by 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 for the micro controller system based on serial ports controller 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 whether to detect frame beginning label.If monitoring frame beginning label,
Then perform following steps：
In this step, frame beginning label is detected in real time, frame beginning label can be trailing edge signal.To frame
During beginning label is detected, it is not necessary to use serial ports work clock.
Step 102, opening clock switch circuit, to produce serial ports work clock.
In this step, serial ports work clock is produced, so that current data frame can be received.
Step 103, reception current data frame.
In this step, the corresponding current data frame of frame beginning label detected is received.
Step 104, judge whether current data frame matches with wake-up association.If current data frame is matched with wake-up association,
Perform step 105, produce wake-up interrupts, wake up micro controller system.
Preferably, it is further comprising the steps of：
If current data frame is mismatched with wake-up association, perform step 106, close clock switch circuit.
In this step, clock switch circuit is closed, and then serial ports work clock is closed.This 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 not detecting frame beginning label, step 151, system operation low-power consumption mode are performed.
In this step, under low-power consumption mode, if not detecting frame beginning label, system continues to run with low-power consumption
Pattern.
Preferably, it is further comprising the steps of before step 151, system operation low-power consumption mode：
Step 121, under system running pattern, judge whether to receive the instruction into low-power consumption mode.If so, then holding
Row step 131, closing clock generation circuit.If it is not, then performing step 141, continuing system running pattern.
In this step, due to entering after low-power consumption mode, the detection process to frame beginning label need not use serial ports work
Make clock.So closing clock generation circuit before system enters low-power consumption mode, and then serial ports work clock is closed, as far as possible
Ground reduces system power dissipation.
Preferably, in step 121, under system running pattern, judge whether to receive the instruction into low-power consumption mode
It is before further comprising the steps of：
Step 111, under system running pattern, the content of the wake-up association is configured by system bus.
In this step, user can be configured by system bus to wake-up association, and it is spy that can select certain several bit
The receiving frame of fixed value regards matching frame, or arbitrary receiving frame all as matching frame, it might even be possible to selection starts frame
It is matching frame that mark, which is treated as,.By the configuration to wake-up association, the flexibility of arousal function is added, it is allowed to which user freely customizes and called out
Awake content, and then selectively wake up micro controller system.
The awakening method for the micro controller system based on serial ports controller that the embodiment of the present invention one is provided is only in detection
To clock switch circuit is just opened during frame beginning label, to produce serial ports work clock, the system under low-power consumption modulus is reduced
Power consumption.
Embodiment two：
Fig. 2 is the structure chart for the serial ports controller that the embodiment of the present invention two is provided.The serial ports that the embodiment of the present invention two is provided
Controller can realize the awakening method described in the embodiment of the present invention one.As shown in Fig. 2 the serial ports controller includes：Configuration is posted
Storage 201, frame start detection circuit 202, data frame receipt circuit 203, receiving frame content analysis circuit 204 and clock switch electricity
Road 205, frame start detection circuit 202 be connected with clock switch circuit 205, receiving frame content analysis circuit 204 respectively with configuration
Register 201 and data frame receiving circuit 203 are connected.
Configuration register 201 is used to store wake-up association.
Preferably, configuration register 201 can also be connected by EBI with the system bus 206 in micro controller system
Connect, under system running pattern, wake-up association is configured by system bus 206.
In the present embodiment, user can be configured by system bus 206 to wake-up association, can select certain several bit
It is the receiving frame that is specifically worth as matching frame, or arbitrary receiving frame all as matching frame, it might even be possible to select frame
It is matching frame that opening flag, which is treated as,.By the configuration to wake-up association, the flexibility of arousal function is added, it is allowed to which user freely determines
The content waken up is made, and then selectively wakes up micro controller system.
Wherein, configuration register includes multiple registers, is written and read by system bus 206, control serial ports controller
Operational mode.System by data are sent can be transmitted to serial ports controller by configuration register 201, and read serial ports controller and connect
The data received.
Frame, which starts detection circuit 202, to be used under low-power consumption mode, judges whether to detect frame beginning label, if detection
To the frame beginning label, then clock switch circuit 205 is opened, to produce serial ports work clock.
In the present embodiment, frame starts to detect the trailing edge signal that circuit 202 is used on detection serial interface 207 in real time,
It is used as frame beginning label.During trailing edge signal is detected, when frame starts detection circuit 202 and need not use the serial ports to work
Clock.System enters before low-power consumption mode, in order to reduce system power dissipation, first can close serial ports work clock.In low-power consumption mould
Under formula, if frame starts detection, circuit 202 detects start of frame delimiter, will open clock switch circuit 205, and then control
Clock generation circuit 208 in micro controller system produces serial ports work clock, allows data frame receipt circuit 203 normal
Receive the content of current data frame.
Preferably, it is CK types edge detection circuit that frame, which starts detection circuit 202,.
Frame starts detection circuit and adjusts 202 to detect circuit with CK types edge, in the case of ensure that serial ports work clock is closed,
Frame starts detection circuit 202 can also normal detection frame beginning label.CK types are detecting start of frame delimiter along detection circuit
Afterwards, the pulse signal of one and serial ports work clock asynchronous relationship each other can be produced.
Data frame receipt circuit 203 is used to receive current data frame.
In the present embodiment, data frame receipt circuit 203 can receive the data frame that serial interface 207 is transmitted.
Receiving frame content analysis circuit 204 is used to judge whether current data frame matches with wake-up association, if current data
Frame is matched with wake-up association, then produces wake-up interrupts, wakes up micro controller system.
In the present embodiment, receiving frame content analysis circuit 204 is used to analyze the current data frame received, judges
Whether it matches with wake-up association, if it does, then producing wake-up interrupts, the interrupt response 209 in input micro controller system is entered
And wake up micro controller system.
Preferably, receiving frame content analysis circuit 204 is connected with clock switch circuit 205.
Content frame analysis circuit 204 is connected with clock switch circuit 205 so that receiving frame content analysis circuit 204 is additionally operable to
When current data frame is mismatched with wake-up association, clock switch circuit 205 is closed.
In the present embodiment, clock switch circuit 205 is closed, and then when controlling the closing serial ports work of clock generation circuit 208
Clock so that while arousal function is realized, reduces the stand-by power consumption of micro controller system as much as possible.
Fig. 3 is the structure chart of the clock switch circuit for the serial ports controller that the embodiment of the present invention two is provided.Preferably, as schemed
Shown in 3, clock switch circuit 205 includes：First trigger 215, the second trigger 225, phase inverter 235 and with door 245, first
Trigger 215 includes the first set end SET1, the first clock end CK1, the first triggering end D1 and the first output end Q1, the second triggering
Device 225 includes the second set end SET2, second clock end CK2, the second triggering end D2 and the second output end Q2.
First set end SET1 starts detection circuit 202 with frame and is connected, the first clock end CK1 and clock generation circuit 208
Output end be connected, the first triggering end D1 is used to receive a low potential, and the first output end Q1 is connected with the second set end SET2；The
Two clock end CK2 are connected with the output end of clock generation circuit 208, the second triggering end D2 and are connected with the output end of door 245, and
Two output end Q2 are connected with the input of clock generation circuit 208；The input of phase inverter 235 and receiving frame content analysis circuit
204 output end is connected, and the output end of phase inverter 235 and is connected with the first input end of door 245, is inputted with the second of door 245
End is connected with the second output end Q2.
First trigger 215 is used to start frame to detect that the pulse signal that circuit 202 is produced enters line broadening and synchronization, second
Trigger 225 is used to produce the clock switch that control clock generation circuit 208 is opened or closed.
Frame is detected when the control serial ports work clock of clock generation circuit 208 is closed, and when frame starts detection circuit 202
During beginning label, the first trigger 215 of control and the set of the second trigger 225, the clock switch of the second output end Q2 outputs are beaten
Open, so as to control clock generation circuit 208 to produce serial ports work clock；When clock generation circuit 208 produces serial ports work clock
When, if receiving frame content analysis circuit 204 judges that current data frame is mismatched with wake-up association, receiving frame content analysis circuit
204 output high potentials so that the clock switch of the second trigger 225 output is closed, so as to control clock generation circuit 208 to close
Serial ports work clock.
Preferably, in addition to：
Data frame transtation mission circuit 210, data frame transtation mission circuit 210 is connected with configuration register 201, is posted for send configuration
The data frame stored in storage.
In the present embodiment, system bus 206 can be transmitted the transmission data come and be sent to string by data frame transtation mission circuit 210
Mouth interface 207.
Data frame receipt circuit 203 is connected with configuration register 201, for the data that will be received from serial interface 207
Frame is sent in configuration register 201.
In the present embodiment, the data frame received can be back to configuration register 201 by data frame receipt circuit 203.
The serial ports controller that the embodiment of the present invention two is provided just opens clock switch only when detecting frame beginning label
Circuit, to produce serial ports work clock, reduces the power consumption of micro controller system under low-power consumption mode, and by will be existing
Serial ports controller increase frame starts detection circuit, clock switch circuit and receiving frame content analysis circuit, realizes arousal function,
For the wake-up of micro controller system, the chip area for realizing that arousal function is consumed is reduced, and then reduce cost.
The technical principle that above are only presently preferred embodiments of the present invention and 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, other more equivalence enforcements can also be included
Example, and the scope of the present invention is determined by the scope of claim.
Claims (11)
1. a kind of awakening method of the micro controller system based on serial ports controller, it is characterised in that including：
Under low-power consumption mode, judge whether to detect frame beginning label, if the frame beginning label is detected, when opening
Clock on-off circuit, to produce serial ports work clock；
Receive current data frame；
Judge whether the current data frame matches with wake-up association, if the current data frame is matched with the wake-up association,
Wake-up interrupts are produced, micro controller system is waken up.
2. awakening method according to claim 1, it is characterised in that also include：
If the current data frame is mismatched with the wake-up association, clock switch circuit is closed.
3. awakening method according to claim 1 or 2, it is characterised in that described under low-power consumption mode, judges whether inspection
Measure before frame beginning label, methods described also includes：
Under system running pattern, judge whether to receive the instruction into the low-power consumption mode；If so, then closing clock production
Raw circuit, if it is not, then continuing system running pattern.
4. awakening method according to claim 3, it is characterised in that described under system running pattern, judges whether to connect
Receive into before the instruction of the low-power consumption mode, methods described also includes：
Under system running pattern, the content of the wake-up association is configured by system bus.
5. a kind of serial ports controller, the serial ports controller can realize any described awakening methods of claim 1-4, it is special
Levy and be, including：
Configuration register, frame start detection circuit, data frame receipt circuit, receiving frame content analysis circuit and clock switch electricity
Road,
The frame start detection circuit be connected with the clock switch circuit, the receiving frame content analysis circuit respectively with it is described
Configuration register and data frame receipt circuit connection；
The configuration register is used to store wake-up association；
The frame, which starts detection circuit, to be used under low-power consumption mode, judges whether to detect frame beginning label, if detected
The frame beginning label, then open clock switch circuit, to produce serial ports work clock；
The data frame receipt circuit is used to receive current data frame；
The receiving frame content analysis circuit is used to judge whether the current data frame matches with the wake-up association, if described
Current data frame is matched with the wake-up association, then produces wake-up interrupts, wakes up micro controller system.
6. serial ports controller according to claim 5, it is characterised in that the receiving frame content analysis circuit with it is described when
Clock on-off circuit is connected；
Mismatched if the receiving frame content analysis circuit is additionally operable to the current data frame with the wake-up association, close institute
State clock switch circuit.
7. serial ports controller according to claim 6, it is characterised in that the configuration register also with micro controller system
In system bus connection, under system running pattern, the wake-up association is configured by the system bus.
8. serial ports controller according to claim 7, it is characterised in that it is the detection of CK types edge that the frame, which starts detection circuit,
Circuit.
9. serial ports controller according to claim 7, it is characterised in that the clock switch circuit includes the first triggering
Device, the second trigger, phase inverter and with door, first trigger be used for by the frame start detect circuit produce pulse believe
Number enter line broadening and synchronization, second trigger is used to produce the clock switch that control clock generation circuit is opened or closed,
Wherein, first trigger includes the first set end, the first clock end, the first triggering end and the first output end, described second
Trigger includes the second set end, second clock end, the second triggering end and the second output end,
First set end starts detection circuit with the frame and is connected, the first clock end and the clock generation circuit
Output end is connected, and first triggering end is used to receive a low potential, and first output end is connected with second set end；
The second clock end is connected with the output end of the clock generation circuit, second triggering end with it is described defeated with door
Go out end to be connected, second output end is connected with the input of the clock generation circuit；
The input of the phase inverter is connected with the output end of the receiving frame content analysis circuit, the output end of the phase inverter
It is connected with described with the first input end of door, it is described to be connected with the second input of door with second output end.
10. serial ports controller according to claim 9, it is characterised in that when the clock generation circuit controls the string
When mouth work clock is closed, and when the frame starts detection electric circuit inspection to frame beginning label, control first trigger
With the second trigger set, the clock switch of the second output end output is opened, so as to control the clock to produce electricity
Road produces serial ports work clock；When the clock generation circuit produces serial ports work clock, if the reception content frame point
Analyse current data frame described in circuit judges to mismatch with the wake-up association, then the high electricity of receiving frame content analysis circuit output
Position so that the clock switch of the second trigger output is closed, so as to control the clock generation circuit to close the serial ports
Work clock.
11. according to any described serial ports controllers of claim 5-9, it is characterised in that also include：
Data frame transtation mission circuit, the data frame transtation mission circuit is connected with the configuration register, for send configuration register
The data frame of middle storage；
The data frame receipt circuit is connected with the configuration register, for the data frame received to be sent into the configuration
In register.
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| CN105071891A (en) * | 2015-08-28 | 2015-11-18 | Tcl移动通信科技（宁波）有限公司 | Bluetooth clock control system and Bluetooth clock control method |
| DE102018204681B4 (en) * | 2017-03-27 | 2019-07-11 | Infineon Technologies Ag | Digital sensor system |
| CN109859454B (en) | 2017-11-30 | 2020-03-10 | 珠海格力电器股份有限公司 | Infrared code sending circuit, chip, remote control equipment and air conditioner based on infrared protocol |
| CN109976501A (en) * | 2017-12-28 | 2019-07-05 | 中移物联网有限公司 | A kind of Low-power-consumptiocontrol control method, device, system and storage medium |
| CN111061358B (en) * | 2018-10-15 | 2021-05-25 | 珠海格力电器股份有限公司 | Clock-free chip wake-up circuit, wake-up method and chip |
| CN111158758B (en) * | 2018-11-07 | 2024-03-15 | 珠海格力电器股份有限公司 | Method and device for waking up central processing unit |
| CN112214246A (en) * | 2019-07-11 | 2021-01-12 | 深圳市航顺芯片技术研发有限公司 | Low-power-consumption multiprocessor serial port awakening method and system |
| CN113177016A (en) * | 2021-05-25 | 2021-07-27 | 惠州Tcl移动通信有限公司 | Serial port communication method, device, terminal equipment and storage medium |
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