CN103823782B - A kind of IIC bridging communication method, Apparatus and system - Google Patents
A kind of IIC bridging communication method, Apparatus and system Download PDFInfo
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- CN103823782B CN103823782B CN201410079865.1A CN201410079865A CN103823782B CN 103823782 B CN103823782 B CN 103823782B CN 201410079865 A CN201410079865 A CN 201410079865A CN 103823782 B CN103823782 B CN 103823782B
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Abstract
The present invention relates to a kind of IIC bridging communication method, Apparatus and system, wherein, this IIC bridging communication method comprises the following steps: receives the first data signal, the first enable signal, the second data signal and the second enable signal according to the first clock signal, and enables signal generate IIC input data signal according to above-mentioned first data signal, the first enable signal, the second data signal and second；IIC outputting data signals is generated according to IIC input data signal；Generate the 3rd data signal, the 3rd enable signal, the 4th data signal and the 4th enable signal according to IIC outputting data signals, and according to above-mentioned first clock signal, above-mentioned 3rd data signal, the 3rd enable signal, the 4th data signal and the 4th are enabled signal and send.The present invention bridges communication device by only arranging an IIC in bridging device, not only increases the IIC bridge joint maintainability of communication system, versatility and real-time, and reduces the cost of IIC bridge joint communication system.
Description
Technical field
The present invention relates to signal processing field, especially a kind of IIC bridging communication method, Apparatus and system.
Background technology
IIC (Inter-Integrated Circuit, IC bus) bus be a kind of simple, two-way,
Two-wire system, synchronous serial bus, be widely used in various electronic system, and this bus has only to one
Root serial data (SDA, serial data) line carries out the transmission of the data signal on iic bus, Yi Jiyi
Root serial clock (SCL, serial clock) line carries out the transmission of the clock signal of iic bus, Ji Keshi
The signal being now connected between the arbitrary equipment in this bus transmits, and each equipment has one uniquely
Address Recognition, either microcontroller, LCD (Liquid Crystal Display, liquid crystal display) drive
Dynamic device, memorizer or keyboard interface etc., can serve as a transmitter or receptor, the most no matter lead and set
Standby or all can send data from equipment or receive data, specifically transmitter or receptor and then set by this
Standby concrete function determines.
As it is shown in figure 1, in current electronic system, due to problems such as electronic system frameworks, device A with
IIC communication between equipment B needs to be completed by bridging device C.Such as, device A is IIC communication
Main equipment, equipment B be IIC communication master device B1 and is set from equipment, bridging device C from dress
Putting A1, master device B1 and equipment B (from equipment) carry out IIC communication, and from device A 1, (master sets with device A
Standby) carry out IIC communication, simultaneously master device B1 with in bridging device C, carry out IIC communication from device A1,
Thus realize the IIC communication between device A and equipment B.
But above-mentioned IIC bridging communication method has a following shortcoming: (1) need to device A with
The IIC communication of equipment B carries out the differentiation of master-slave equipment, if device A and the master slave relation of equipment B
Exchanging, the bridge joint scheme of bridging device C is also required to redesign；(2) in order to realize bridge joint, bridge
Connect and equipment C needs arrange master device B1 and from device A1 to complete device A and equipment B
IIC communication, it is achieved process is cumbersome；(3) the IIC communication between device A and equipment B
Data bit change or time the address bit of IIC communication changes, need correspondingly to revise bridge
Connecing the IIC communications protocol of equipment C, system can safeguard variation, and versatility is deteriorated；(4) this bridge joint
Scheme typically requires and increases a set of communication handshake mechanism extraly, to ensure device A and equipment B
Between the correctness of IIC communication, system cost is higher and real-time is poor.
Summary of the invention
It is an object of the invention to provide a kind of IIC bridging communication method, Apparatus and system, in order to solve
Problems of the prior art are with not enough.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of IIC bridging communication method of the present invention, comprises the following steps: connect according to the first clock signal
Receive the first data signal, the first enable signal, the second data signal and the second enable signal, and according to institute
State the first data signal, described first enable signal, described second data signal and described second enable letter
Number generate IIC input data signal；IIC outputting data signals is generated according to described IIC input data signal；
And generate the 3rd data signal, the 3rd enable signal, the 4th data according to described IIC outputting data signals
Signal and the 4th enables signal, and according to described first clock signal by described 3rd data signal, described
3rd enables signal, described 4th data signal and the described 4th enables signal transmission.
In one embodiment of this invention, described defeated according to described IIC input data signal generation IIC
Go out data signal to comprise the following steps: generate the first status signal according to described IIC input data signal；
The second status signal is generated according to described first status signal；And generate according to described second status signal
Described IIC outputting data signals.
In one embodiment of this invention, described first status signal is pre-stored in first memory, institute
State the second status signal to be pre-stored in second memory.
In one embodiment of this invention, described IIC bridging communication method is further comprising the steps of: thoroughly
Passing second clock signal, wherein, the speed of described first clock signal is at least described second clock letter
Number 8 times of speed.
A kind of IIC of the present invention bridges communication device, including: IIC input module, bridge status mould
Block and IIC output module, wherein, described IIC input module, for connecing according to the first clock signal
Receive the first data signal, first enable signal, the second data signal and second enable signal, and according to
Described first data signal, described first enable signal, described second data signal and described second make
IIC input data signal can be generated by signal；And for transparent transmission second clock signal；Described bridge joint shape
Morphotype block, for generating IIC outputting data signals according to described IIC input data signal；And it is described
IIC output module, for according to described IIC outputting data signals generate the 3rd data signal, the 3rd
Enable signal, the 4th data signal and the 4th and enable signal, and according to described first clock signal by institute
State the 3rd data signal, described 3rd enable signal, described 4th data signal and described 4th enable
Signal sends.
In one embodiment of this invention, bridge status module includes: lookup of state module, for root
The first status signal is generated according to described IIC input data signal；And state transition module, for basis
Described first status signal generates the second status signal, and generates described according to described second status signal
IIC outputting data signals.
In one embodiment of this invention, lookup of state module includes a first memory, state transition
Module includes a second memory, and wherein, described first memory is used for the described first state letter that prestores
Number, described second memory is used for described second status signal that prestores.
In one embodiment of this invention, described first memory is read-only with described second memory
Memorizer (ROM), random access memory (RAM), depositor (REG), first in first out are delayed
Storage (FIFO) or double rate memory (DDR).
In one embodiment of this invention, when the speed of described first clock signal is at least described second
8 times of the speed of clock signal.
A kind of IIC of the present invention bridges communication system, including at least one first equipment, at least one second
Equipment and a bridging device, wherein, described bridging device includes at least one arbitrary IIC bridge described above
Connect communication device, to realize the IIC bridge of the second equipment described in the first equipment and at least one described at least one
Connect news.
In one embodiment of this invention, described first equipment and described second equipment are microcontroller
Device, arm processor, digital signal processor (dsp processor) or there is IIC communications protocol
Any one in the chip of function.
In one embodiment of this invention, described bridging device is field programmable gate array chip
(fpga chip), dedicated IC chip (asic chip) or system level chip (SOC
Chip) in any one.
Compared with prior art, a kind of IIC bridging communication method of the present invention, Apparatus and system have
Advantages below: by refining and after prestore the first status signal and the second status signal, it is no longer necessary to district
Point the first equipment and the master slave relation of the second equipment, the most no matter IIC bridge communication data bit or
Also it is no longer necessary to redesign the bridge joint scheme of bridging device when address bit changes, thus improves
The maintainability of IIC bridge joint communication system and versatility, and only need to arrange one in bridging device
IIC bridges communication device, thus saves the hardware resource of bridging device, reduces IIC bridge joint logical
The cost of news system, additionally, this kind of bridge joint communication scheme is no longer necessary to increase a set of communication extraly and holds
Mobile phone system, create a further reduction the cost of IIC bridge joint communication system, also improves IIC bridge joint logical
The real-time of news system.
Accompanying drawing explanation
The structural representation of the IIC bridge joint communication system of Fig. 1 prior art.
The method flow diagram of the IIC bridging communication method of Fig. 2 present invention.
The structural representation of the IIC bridge joint communication device of Fig. 3 present invention.
The structural representation of the IIC bridge joint communication system of Fig. 4 present invention.
Wherein, description of reference numerals is as follows:
1IIC bridges communication system, 10 first equipment, 10a the first equipment, 10b the first equipment, and 20
Second equipment, 20a the second equipment, 20b the second equipment, 201～203 steps, 30 bridging devices,
301IIC bridges communication device, and 301a IIC bridges communication device, and 301b IIC bridges communication device,
3011IIC input module, 3012 bridge status modules, 3012a lookup of state module, 3012b shape
State redirects module, 3013IIC output module.
Detailed description of the invention
Below with reference to accompanying drawing, the present invention is given elaboration further.
As in figure 2 it is shown, be the method flow diagram of the IIC bridging communication method of the present invention, this IIC bridges
The means of communication comprise the following steps:
Step 201, according to the first clock signal receive the first data signal, first enable signal, second
Data signal and second enable signal, and according to above-mentioned first data signal, first enable signal, second
Data signal and second enables signal and generates IIC input data signal；
Step 202, the IIC input data signal generated according to step 201 generates IIC and exports data
Signal；
Step 203, according to step 202 generate IIC outputting data signals generate the 3rd data signal,
3rd enables signal, the 4th data signal and the 4th enables signal, and according to above-mentioned first clock signal
Above-mentioned 3rd data signal, the 3rd enable signal, the 4th data signal and the 4th are enabled signal and send.
As it is shown on figure 3, be the structural representation of the IIC bridge joint communication device of the present invention, this IIC bridge
Connect communication device 301 to include: IIC input module 3011, bridge status module 3012 and IIC export
Module 3013.
Specifically, IIC input module 3011, for the first clock according to IIC bridge joint communication system
Signal receives the first data signal, the first enable signal, the second data signal and the second enable signal,
And enable signal according to above-mentioned first data signal, the first enable signal, the second data signal and second
Generate IIC input data signal；And the second clock signal of transparent transmission iic bus.
Bridge status module 3012, inputs number for the IIC generated according to IIC input module 3011
The number of it is believed that generates IIC outputting data signals, and wherein, bridge status module 3012 specifically includes: shape
State searches module 3012a, for the IIC input data signal generated according to IIC input module 3011
Generate the first status signal；State transition module 3012b, for according to lookup of state module 3012a
The first status signal generate the second status signal, and generate IIC according to the second status signal and export number
The number of it is believed that.
IIC output module 3013, exports number for the IIC generated according to state transition module 3012b
The number of it is believed that generates the 3rd data signal, the 3rd enable signal, the 4th data signal and the 4th enable signal,
And bridge the first clock signal of communication system by above-mentioned 3rd data signal, the 3rd enable according to IIC
Signal, the 4th data signal and the 4th enable signal and send.
As shown in Figure 4, for the structural representation of the IIC bridge joint communication system of the present invention, this IIC bridge
Connecing communication system 1 to include: at least one first equipment 10, at least one second equipment 20, a bridge joint sets
Standby 30.Specifically, no matter the concrete function of the first equipment 10 and the second equipment 20 is why, and first
Equipment 10 and the second equipment 20 do not repartition master slave relation, can carry out IIC bridge joint more easily logical
News；Bridging device 30 comprises at least one IIC and bridges communication device 301, thus realizes the first equipment
10 and second IIC between equipment 20 bridge communication.Wherein, the first equipment 10 and the second equipment
20 may each be microcontroller, arm processor, dsp processor or other have IIC communication association
View function chip in any one；Bridging device 30 can be fpga chip, asic chip
Or any one in SOC.
Table 1
As shown in Table 1, for the Change of Data Stream table of the IIC bridge joint communication scheme of the present invention, existing knot
Close Fig. 2, Fig. 3, Fig. 4 one embodiment of the invention is explained, in the present embodiment,
IIC bridge joint communication system 1 comprises one first equipment 10,1 second equipment 20 and a bridging device 30,
Change of Data Stream is the 2nd row of table 1.
In step 201, the IIC input module 3011 of the IIC bridge joint communication device 301 of bridging device 30
The first clock signal according to IIC bridge joint communication system 1 receives the first data sent by the first equipment 10
Signal 0 and first enables signal 0, the second data signal 0 and the second enable sent by the second equipment 20
Signal 0, and enable signal the 0, second data signal 0 and the according to above-mentioned first data signal 0, first
Two enable signal 0 generates IIC input data signal 0000；And at first equipment the 10, second equipment
The transparent transmission of the second clock signal of iic bus is completed between 20 and bridging device 30.
Wherein, the speed of the first clock signal of IIC bridge joint communication system 1 is at least iic bus
8 times of the speed of second clock signal, thus ensure the correctness of IIC bridge joint communication.In this enforcement
In example, it is preferable that the speed of the first clock signal is 8 times of the speed of second clock signal.
In step 202., bridge status module 3012 is according to IIC input module 3011 in step 201
The IIC input data signal 0000 generated generates IIC outputting data signals 0101.
Wherein, lookup of state module 3012a of bridge status module 3012 is defeated according to the IIC received
Enter data signal 0000 and correspondingly search generation first in first memory (not shown in Fig. 3)
Status signal S0, state transition module 3012b is deposited second according to the first status signal S0 received
Reservoir (not shown in Fig. 3) correspondingly redirects generation the second status signal T5, and according to second
Status signal T5 generates IIC outputting data signals 0101.
It should be noted that the first status signal S0 and the second status signal T5 is according to IIC communication
The result that extracts after protocal analysis and be stored respectively in advance first memory with in second memory,
Remaining first status signal S1～S15 and the second status signal T1～T4, T6～T15 in like manner, wherein,
First memory and second memory are all the devices with storage function, such as ROM, RAM,
REG, FIFO or DDR, in this embodiment, it is preferred that, first memory and second memory
It is ROM.
In step 203, IIC output module 3013 is according to state transition module 3012b in step 202
The IIC outputting data signals 0101 generated generate the 3rd data signal 0, the 3rd enable signal 1, the
Four data signals 0 and the 4th enable signal 1, and according to the first clock of IIC bridge joint communication system 1
Above-mentioned 3rd data signal 0 and the 3rd enable signal 1 are sent to the first equipment 10, by upper by signal
State the 4th data signal 0 and the 4th enable signal 1 sends to the second equipment 20.
Treating that above-mentioned steps completes, the i.e. first equipment 10 receives the 3rd data signal 0 and the 3rd and makes
After energy signal the 1, second equipment 20 receives the 4th data signal 0 and the 4th enable signal 1,
I.e. complete the IIC between first equipment 10 and the second equipment 20 and bridge communication.
In another embodiment of the invention, Change of Data Stream can be table 1 the 3rd～17 row in appoint
Meaning a line, an IIC bridging communication method flow process keeps constant, just repeats no more at this.
In another embodiment of the invention, IIC bridge joint communication device 301 can also solidify as stone
In bridging device 30, to reduce the volume of bridging device 30, thus it is logical to reduce IIC bridge joint further
The cost of news system.
In another embodiment of the invention, IIC bridge joint communication system 1 comprise one first equipment 10a,
One first equipment 10b, one second equipment 20 and a bridging device 30, the first equipment 10a or first
Equipment 10b IIC bridging communication method flow process respectively and between the second equipment 20 and above-described embodiment
Described IIC bridging communication method flow process is consistent, is not repeating at this.It should be noted that
When the first equipment 10a and the first equipment 10b switches over, the IIC bridge joint of bridging device 30 is logical
Reception direction is switched to first by the first equipment 10a by the IIC input module 3011 of news device 301a
On equipment 10b, i.e. IIC input module 3011 is according to the first clock letter of IIC bridge joint communication system 1
Number receiving the first data signal sent by the first equipment 10b and first enables signal, and the second equipment
Whether 20 be not required to pay close attention to the address bit (each equipment corresponding unique mark) of IIC bridge joint communication
There occurs change.Similarly, said method is also applied for one first equipment 10 and multiple second equipment
The situation of the IIC bridge joint communication between 20, is also applied for multiple first equipment 10 and sets with multiple second
The situation of the IIC bridge joint communication between standby 20, is not repeating at this.Certainly, in order to improve IIC
The real-time of bridge joint communication system 1, it is also possible to set up an IIC in bridging device 30 and bridge communication
Device 301b, the IIC bridge joint communication between the i.e. first equipment 10a and the second equipment 20a is by bridge joint
Equipment 30 IIC bridge joint communication device 301a complete, the first equipment 10b and the second equipment 20b it
Between IIC bridge joint communication completed by the IIC of bridging device 30 bridge joint communication device 301b.
In sum, a kind of IIC bridging communication method of the present invention, Apparatus and system are by refining and pre-
After depositing the first status signal and the second status signal, it is no longer necessary to distinguish the first equipment and the master of the second equipment
From relation, data bit or the address bit of the most no matter IIC bridge joint communication are also no longer necessary to when changing
Redesign bridging device bridge joint scheme, thus improve IIC bridge joint communication system maintainability with
Versatility, and only needing in bridging device, an IIC is set and bridges communication device, thus save bridge
Connect the hardware resource of equipment, reduce the cost of IIC bridge joint communication system, additionally, the communication of this kind of bridge joint
Scheme is no longer necessary to increase a set of communication handshake mechanism extraly, create a further reduction IIC and bridges communication
The cost of system, also improves the real-time of IIC bridge joint communication system.
Foregoing, only presently preferred embodiments of the present invention, be not intended to limit embodiment of the present invention,
Those of ordinary skill in the art, according to the central scope of the present invention and spirit, can carry out phase very easily
The accommodation answered or amendment, therefore protection scope of the present invention should be with the protection domain required by claims
Accurate.
Claims (8)
1. an IIC bridging communication method, it is characterised in that comprise the following steps:
Receive the first data signal according to the first clock signal, first enable signal, the second data signal and the
Two enable signal, and according to described first data signal, described first enable signal, described second data letter
Number and described second enable signal generate IIC input data signal；
IIC outputting data signals is generated according to described IIC input data signal；And
According to described IIC outputting data signals generate the 3rd data signal, the 3rd enable signal, the 4th
Data signal and the 4th enable signal, and according to described first clock signal by described 3rd data signal,
Described 3rd enables signal, described 4th data signal and the described 4th enables signal transmission；
Wherein, described according to described IIC input data signal generate IIC outputting data signals include following
Step:
The first status signal is generated according to described IIC input data signal；
The second status signal is generated according to described first status signal；And
Described IIC outputting data signals is generated according to described second status signal.
IIC bridging communication method the most according to claim 1, it is characterised in that described first
Status signal is pre-stored in first memory, and described second status signal is pre-stored in second memory.
IIC bridging communication method the most according to claim 1, it is characterised in that described IIC
Bridging communication method is further comprising the steps of: transparent transmission second clock signal, wherein, and described first clock
The speed of signal is at least 8 times of the speed of described second clock signal.
4. an IIC bridges communication device, it is characterised in that including: IIC input module, bridge joint shape
Morphotype block and IIC output module, wherein,
Described IIC input module, for according to the first clock signal receive the first data signal, first
Enable signal, the second data signal and second and enable signal, and according to described first data signal, institute
State the first enable signal, described second data signal and described second and enable signal generation IIC input number
The number of it is believed that；And for transparent transmission second clock signal；
Described bridge status module, exports data for generating IIC according to described IIC input data signal
Signal；And
Described IIC output module, for according to described IIC outputting data signals generate the 3rd data signal,
3rd enables signal, the 4th data signal and the 4th enables signal, and according to described first clock signal
By described 3rd data signal, described 3rd enable signal, described 4th data signal and the described 4th
Enable signal sends；
Wherein, described bridge status module includes:
Lookup of state module, for generating the first status signal according to described IIC input data signal；
And
State transition module, for generating the second status signal, and root according to described first status signal
Described IIC outputting data signals is generated according to described second status signal.
IIC the most according to claim 4 bridges communication device, it is characterised in that described state
Search module and include that a first memory, described state transition module include a second memory, wherein,
Described first memory is used for described first status signal that prestores, and described second memory is used for the institute that prestores
State the second status signal.
IIC the most according to claim 4 bridges communication device, it is characterised in that described first
The speed of clock signal is at least 8 times of the speed of described second clock signal.
7. an IIC bridges communication system, it is characterised in that include at least one first equipment, at least
One second equipment and a bridging device, wherein, described bridging device includes at least just like claim 4-6
Described arbitrary IIC bridges communication device, to realize described in the first equipment and at least one described at least one
The IIC of the second equipment bridges communication.
IIC the most according to claim 7 bridges communication system, it is characterised in that described first
Equipment and described second equipment are microcontroller, arm processor, dsp processor or have IIC
Any one in the chip of communications protocol function, described bridging device is fpga chip, ASIC core
Any one in sheet or SOC.
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