CN110401522A - A kind of data communication apparatus, controller and its data communication method - Google Patents
A kind of data communication apparatus, controller and its data communication method Download PDFInfo
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- CN110401522A CN110401522A CN201910786640.2A CN201910786640A CN110401522A CN 110401522 A CN110401522 A CN 110401522A CN 201910786640 A CN201910786640 A CN 201910786640A CN 110401522 A CN110401522 A CN 110401522A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
Abstract
The invention discloses a kind of data communication apparatus, controller and its data communication method, which includes: UART receiving module, comprising: a UART module realizes that the UART of data is received for the UART receive capabilities based on UART module itself；UART sending module, comprising: the resource module of the controller of pending data communication itself simulates UART module, and simulation UART module realizes that the UART of data is sent for simulating the UART transmission timing of UART module；Or another UART module, another UART module realize that the UART of data is sent for the UART sending function based on UART module itself.The solution of the present invention can solve the main MCU by using full duplex communication to improve the problem of communication speed will lead to increased costs, achieve the effect that reduce cost.
Description
Technical field
The invention belongs to communication technique fields, and in particular to a kind of data communication apparatus, controller and its data communication side
Method, more particularly to one kind pass through timer and simulate UART (Universal Asynchronous Receiver/
Transmitter, universal asynchronous receiving-transmitting transmitter) send data-selected scheme realization device, controller and its data communication method.
Background technique
At this stage with internet of things technology be constantly progressive and user's being gradually increased for communication speed requirement, household electric
It is imperative that device increases internet of things technology.Also there are more and more household electrical appliance to increase WIFI function at present, user can be allowed straight
It connects with mobile phone come household electrical appliance such as operating air conditioners, but it is still the main complaint point of the discontented WIFI function of user that communication speed is excessively slow.
To improve communication speed, in the selection of most master chips, selection supports the main MCU of full duplex communication to mention
High communication speed；And upgrade and use full duplex communication chip, then it will lead to increased costs.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
It is an object of the present invention in view of the foregoing drawbacks, a kind of data communication apparatus, controller and its data communication are provided
Method reaches drop to solve the problems, such as that the main MCU by using full duplex communication will lead to increased costs to improve communication speed
The effect of low cost.
The present invention provides a kind of data communication apparatus, comprising: UART receiving module and UART sending module；Wherein, described
UART receiving module realizes that the UART of data is received for the UART receive capabilities based on UART module itself；The UART hair
Module is sent, for simulating the UART transmission timing of UART module or the UART sending function based on UART module itself, realizes number
According to UART send；Wherein, the UART sending module, comprising: the resource module of the controller of pending data communication itself,
Simulation UART module realizes that the UART of data is sent for simulating the UART transmission timing of UART module；Or another UART mould
Block, another UART module realize that the UART of data is sent for the UART sending function based on UART module itself.
Optionally, the simulation UART module, comprising: output module, counting module and control module；Wherein, described defeated
Module out realizes that data are sent for simulating the UART sending function of the UART module；Counting module, for according to setting
Baud rate scope carries out timing, obtains timing time；Control module, for controlling the output module according to the timing time
Transmission timing, realize that the output module simulates the UART sending function of the UART module.
Optionally, wherein the UART module, comprising: the UART communication resources module of half-duplex chip；And/or it is described
Output module, comprising: the I/O port of controller；And/or the counting module, comprising: the internal timing interrupt resources mould of controller
Block.
Optionally, the control module controls the transmission timing of the output module according to the timing time, comprising: control
The controller power-on initialization is made, the port level that the output module is arranged is the first signal, and is wanted by preset interruption
Seek the configuration counting module；It determines the need for sending data；If desired data are sent, then store data to be sent, are calculated
The check bit of the data to be sent, and start the tally function of the counting module；In the timer interrupt control of the counting module
Under system, the output module is controlled according to preset baud rate and sends next data bit in the case where timing time arrives,
Realize that the UART of data is sent with the transmission timing by simulation UART.
Optionally, the control module controls the feelings that the output module arrives according to preset baud rate in timing time
Next data bit is sent under condition, comprising: determine the data bit number of data to be sent in default value range present position；
After being adjusted according to port level of the position to the output module or send the corresponding data of corresponding data position, control
The data bit number increases automatically or closes after sending stop bits the tally function of the counting module.
Optionally, the control module is adjusted or sends according to port level of the position to the output module
The corresponding data of corresponding data position, comprising: if the data bit number is the lower limit of default value range, start bit is sent,
The port level of the output module is set to second signal；If the data bit number is greater than under default value range
Limit and the upper limit for being less than default value range, then the size order according to the data bit number successively sends data to be sent
Each data bit；If the data bit number is equal to the upper limit of default value range, check bit is sent；If the data bit
Number is greater than the upper limit of default value range, then sends stop bits, and the port level of the output module is set to the first letter
Number.
Match with above-mentioned apparatus, further aspect of the present invention provides a kind of controller, comprising: above-described data communication
Device.
Match with above controller, further aspect of the present invention provides a kind of data communication method of controller, comprising: logical
A UART module is crossed as UART receiving module, based on the UART receive capabilities of UART module itself, realizes that the UART of data connects
It receives；By UART sending module, simulates the UART transmission timing of UART module or the UART based on UART module itself sends function
Can, realize that the UART of data is sent；Wherein, the UART sending module, comprising: the controller of pending data communication itself
Resource module, simulation UART module realize that the UART of data is sent for simulating the UART transmission timing of UART module；Or
Another UART module, another UART module realize the UART of data for the UART sending function based on UART module itself
It sends.
Optionally, pass through the UART transmission timing of simulation UART module simulation UART module, comprising: by output module,
The UART sending function of the UART module is simulated, realizes that data are sent；By counting module, according to setting baud rate scope into
Row timing, obtains timing time；By control module, the transmission timing of the output module is controlled according to the timing time,
Realize that the output module simulates the UART sending function of the UART module.
Optionally, the transmission timing of the output module is controlled according to the timing time by control module, comprising: control
The controller power-on initialization is made, the port level that the output module is arranged is the first signal, and is wanted by preset interruption
Seek the configuration counting module；It determines the need for sending data；If desired data are sent, then store data to be sent, are calculated
The check bit of the data to be sent, and start the tally function of the counting module；In the timer interrupt control of the counting module
Under system, the output module is controlled according to preset baud rate and sends next data bit in the case where timing time arrives,
Realize that the UART of data is sent with the transmission timing by simulation UART.
Optionally, the feelings that the output module arrives according to preset baud rate in timing time are controlled by control module
Next data bit is sent under condition, comprising: determine the data bit number of data to be sent in default value range present position；
After being adjusted according to port level of the position to the output module or send the corresponding data of corresponding data position, control
The data bit number increases automatically or closes after sending stop bits the tally function of the counting module.
Optionally, it is adjusted or sends according to port level of the position to the output module by control module
The corresponding data of corresponding data position, comprising: if the data bit number is the lower limit of default value range, start bit is sent,
The port level of the output module is set to second signal；If the data bit number is greater than under default value range
Limit and the upper limit for being less than default value range, then the size order according to the data bit number successively sends data to be sent
Each data bit；If the data bit number is equal to the upper limit of default value range, check bit is sent；If the data bit
Number is greater than the upper limit of default value range, then sends stop bits, and the port level of the output module is set to the first letter
Number.
The solution of the present invention can be with save the cost by realizing full duplex communication function using half-duplex chip；May be used also
To improve the communication speed of household electrical appliance, user's usage comfort is promoted.
Further, the solution of the present invention can by using the timer internal resource that can only support half duplex communication chip
To realize the communication function of chip full duplex, guarantee that full duplex communication function is normal, while reducing into product cost.
Further, the solution of the present invention is interrupted by the UART communication resources and internal timing that utilize half-duplex chip
As the resource distribution for completing full duplex communication, and using internal counter according to different baud rate timing different times, control
Common output mouth level simulates UART sending function, realizes full duplex on the chip platform for only supporting half duplex communication
Communication modes, it is at low cost, user experience is good.
The solution of the present invention as a result, realizes full duplex communication function by using the chip of half duplex communication is only supported,
It solves the problems, such as to will lead to increased costs by using the main MCU of full duplex communication to improve communication speed, reaching reduces cost
Effect.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of data communication apparatus of the invention；
Fig. 2 is the flow diagram of an embodiment of data communication method of the invention；
Fig. 3 is an implementation of the UART transmission timing in method of the invention by simulation UART module simulation UART module
The flow diagram of example；
Fig. 4 is the implementation for controlling the transmission timing of the output module in method of the invention according to the timing time
The flow diagram of example；
Fig. 5 is to send next number in the case where timing time arrives according to preset baud rate in method of the invention
According to the flow diagram of an embodiment of position；
Fig. 6 is the flow diagram of the transmission simulation process of an embodiment of controller of the invention, wherein (a) is hair
Mathematical logic flow diagram is sent, (b) flow diagram to send digital simulation processing mode；
Fig. 7 is the use circuit theory schematic diagram of the resources of chip of an embodiment of controller of the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
According to an embodiment of the invention, providing a kind of data communication apparatus.The one of the device of the invention shown in Figure 1
The structural schematic diagram of embodiment.The data communication apparatus may include: UART receiving module and UART sending module.
Specifically, the UART receiving module may include: a UART module, for based on UART module itself
UART receive capabilities realize that the UART of data is received.
Optionally, the UART module may include: the UART communication resources module of half-duplex chip.
Such as: it is interrupted using the UART communication resources and internal timing of half-duplex chip as completion full duplex communication
Resource distribution, and a kind of corresponding software algorithm is provided, full duplex is realized on the chip platform for only supporting half duplex communication
Communication modes.
Such as: data are sended and received using two groups of difference UART ports of the chip for supporting half duplex communication, or are used
One group of UART port and external interrupt simulation UART are received.
It is at low cost as a result, by using the UART communication resources module of half-duplex chip as UART module, and can
Receive capabilities by realizing data.
Specifically, the UART sending module can be used for simulating the UART transmission timing of UART module or based on UART
The UART sending function of module itself realizes that the UART of data is sent.Preferably, the UART sending module, can be used for leading to
It crosses the UART transmission timing for simulating UART module using counter and I/O port or the UART based on UART module itself sends function
Can, realize that the UART of data is sent.That is, the simulation UART module, can be used for the internal counter by using controller
With O mouthfuls of exterior I, the UART transmission timing or UART sending function based on UART module itself for simulating UART module realize number
According to UART send.
Such as: on function logic, using UART receive capabilities, without the use of its sending function；Sending function is by making
UART timing is simulated with internal counter and common I/O port, reaches and realizes UART sending function.
Wherein, the UART sending module may include: the resource module of the controller itself of pending data communication,
Simulation UART module realizes that the UART of data is sent for simulating the UART transmission timing of UART module；Or another UART mould
Block, another UART module realize that the UART of data is sent for the UART sending function based on UART module itself.
Such as: it is a kind of that data-selected scheme is sent by timer simulation UART (i.e. universal asynchronous receiving-transmitting transmitter), utilize half
Duplexing chip realizes full duplex communication function, save the cost；The communication speed of household electrical appliance can also be improved, promoting user makes
With comfort level, customer complaint is reduced.
Such as: using that can only support other resources of the inside of half duplex communication chip, realize the communication function of chip full duplex
Can, guarantee that full duplex communication function is normal, while reducing into product cost.In this way, the solution of the present invention, may be implemented using only
The chip of half duplex communication is supported to realize full duplex communication function.With this solution, the half-duplex core of low cost can be used
Piece reaches the requirement of full duplex communication function, and development is low in cost, improves product competitiveness in the market.
As a result, by making UART module realize receive capabilities, and keep the transmission timing for simulating UART module simulation UART real
Existing sending function, not only realizes the reliable communicating of data, but also reduce costs.
Optionally, the simulation UART module, may include: output module, counting module and control module.
That is, the data communication apparatus, may include: UART module, output module, counting module and control mould
Block.Wherein, output module, counting module and control module are the internal resource modules of controller itself.
Such as: UART is simulated using one group of UART (i.e. universal asynchronous receiving-transmitting transmitter)+common output mouth+internal counter
Scheme.Such as because when resources of chip is limited or practice is needed using multiple groups UART port, and it is unable to satisfy while uses two
UART port is organized to realize full duplex communication, then it is contemplated that using internal counter according to different baud rate timing different times, control
Common output mouth level processed simulates UART sending function, to realize full duplex communication requirement.
Specifically, the output module can be used for simulating the UART sending function of the UART module, realize data hair
It send.
More optionally, the output module may include: the I/O port of controller.
As a result, by using the I/O port of controller as output module, it is not required to increase cost, and can reliably realize data
Transmission.
Specifically, counting module can be used for carrying out timing according to setting baud rate scope, obtain timing time.
More optionally, the counting module may include: the internal timing interrupt resources module of controller.
As a result, by using the internal timing interrupt resources of controller as counting module, it is not required to increase cost, and can be with
Realize that reliable timer interrupt is controlled when simulating UART sending function using I/O port.
Specifically, control module can be used for controlling the transmission timing of the output module according to the timing time, real
The existing output module simulates the UART sending function of the UART module.
Such as: control module can use the control section of controller such as MCU.
As a result, by using the cooperation of output module, counting module and control module, the transmission of simulation UART module is realized
Function, structure is simple, at low cost, and the available guarantee of reliability that data are sent.
Still optionally further, the control module controls the transmission timing of the output module according to the timing time,
May include:
The control module specifically can be also used for controlling the controller power-on initialization, the output module be arranged
Port level be the first signal, and configure the counting module by preset interrupt request.Such as: first signal can be
High level.
Such as: power-up initializing is set using the common I/O port (i.e. transmission I/O port) of the sending port of simulation UART function
For high level, the counter that need to be used is initialized.
The control module specifically can be also used for determining the need for sending data；If desired data are sent, then are stored
Data to be sent, calculate the check bit of the data to be sent, and start the tally function of the counting module；And described
Counting module timer interrupt control under, control the output module according to preset baud rate timing time arrive the case where
It is lower to send next data bit, realize that the UART of data is sent with the transmission timing by simulation UART；If no need to send numbers
According to then continuing waiting for.
Such as: judge whether to need to send data, if not, with no treatment；If so, then depositing data to be sent
When entering variables A, and calculate check bit, and starting counter counts.The data that judgement is sent set timer according to baud rate
Time, timing time arrive, and send next data bit, simulate UART sending function.
It is arranged as a result, by the timing of the configuration counting module in power-up initializing, and the starting when needing to send data
Timer interrupt interrupts and then simulates the sending function realization data transmission of UART, and realization makes control module according to timing time control
The transmission timing of output module processed, so that the simulation to UART sending function is precisely and reliable.
More optionally, the control module controls what the output module arrived according to preset baud rate in timing time
In the case of send next data bit, may include:
The control module, the data bit number that specifically can be also used for determining data to be sent is in default value range
Present position.
The control module specifically can be also used for being adjusted according to port level of the position to the output module
After corresponding data that is whole or sending corresponding data position, controls the data bit number and increase automatically or closed after sending stop bits
Close the tally function of the counting module.Such as: after being sent completely, variable B adds 1 certainly.If a frame data are sent completely, then reset
Variable is closed timer and is interrupted, is transferred to step b；It such as the not sent completion of a frame data, then waits, the tape timer time arrives, and continues
Send data.
Such as: it is clocked into device interruption, then judges the position number (such as variable B) of data to be sent, and according to judging result
It is handled.
As a result, by the data bit number based on data to be sent in default value range present position to corresponding positions data
Corresponding transmission processing is carried out, so that sending to the data of corresponding data position reliable and accurate.
Further optionally, the control module is adjusted according to port level of the position to the output module
Corresponding data that is whole or sending corresponding data position is (that is, the control module is according to the data bit number of data to be sent pre-
If numberical range present position, the port level of the output module is adjusted or is sent the correspondence number of corresponding data position
According to), it may include following any transmission situation.
The first sends situation: the control module, if specifically can be also used for the data bit number is default value
The lower limit of range then sends start bit, i.e., the port level of the output module is set to second signal.Such as: second signal
It can be low level signal.
Such as: if variable B is zero, then it represents that start bit need to be sent, I/O port is sent and set low level.
Second of transmission situation: the control module, if specifically can be also used for the data bit number greater than present count
It is worth the lower limit of range and is less than the upper limit of default value range, then the size order according to the data bit number is successively sent
Each data bit of data to be sent.
Such as: if variable B is not zero and less than 9, then it represents that (such as variables A) position (variables A size herein of data to be sent
Just it is 1-8 for a byte i.e. 8 bit, variable B, therefore can successively sends each data bit of variables A using this relationship).
The third sends situation: the control module, if specifically can be also used for the data bit number equal to present count
It is worth the upper limit of range, then sends check bit.
Such as: if variable B is 9, then it represents that send check bit.
4th kind of transmission situation: the control module, if specifically can be also used for the data bit number greater than present count
It is worth the upper limit of range, then sends stop bits, and the port level of the output module is set to the first signal.
Such as: if variable B is greater than 9, stop bits is sent, transmission I/O port sets high level, and (stop bits is advised according to communications protocol
It is fixed, send it is primary this example illustrates by taking a stop bits as an example still twice, two stop bits be a multiple stop bits and
), stop bits is sent.
As a result, by ensure that each data bits according to hair to the different transmissions of each data bits evidence and processing mode
The accuracy and reliability sent.
Through a large amount of verification experimental verification, using technical solution of the present invention, by realizing full duplex using half-duplex chip
Communication function, can be with save the cost.The communication speed of household electrical appliance can also be improved, user's usage comfort is promoted.
According to an embodiment of the invention, additionally providing a kind of controller corresponding to data communication apparatus.The controller can
To include: above-described data communication apparatus.
In an optional example, the solution of the present invention is provided a kind of by timer simulation UART (i.e. universal asynchronous receipts
Send out transmitter) data-selected scheme is sent, full duplex communication function, save the cost are realized using half-duplex chip；It can also improve
The communication speed of household electrical appliance promotes user's usage comfort, reduces customer complaint.
Wherein, half-duplex (Half Duplex) data transmission index evidence can be in the both direction of a signal vehicle
Transmission, but it is unable to simultaneous transmission.For example, using the technology with half-duplex transmission, a work station on a local area network
Data can be sent on line, receive data on line immediately after, these data are from the direction that data have just been transmitted.As complete
Duplex transmission is the same, and half-duplex includes a bidirectional line (route can transmit data in two directions).
In an optional example, the solution of the present invention, use can only support other moneys of the inside of half duplex communication chip
The communication function of chip full duplex is realized in source such as internal timing interrupt resources etc., is guaranteed that full duplex communication function is normal, is dropped simultaneously
It is low at product cost.
In this way, the solution of the present invention, may be implemented to realize full duplex communication using the chip of half duplex communication is only supported
Function.With this solution, the half-duplex chip that low cost can be used reaches the requirement of full duplex communication function, development at
This is cheap, improves product competitiveness in the market.
In an optional specific embodiment, Fig. 6 and example shown in Fig. 7 may refer to, to the solution of the present invention
Specific implementation process illustrates.
The solution of the present invention is interrupted complete double as completing using the UART communication resources and internal timing of half-duplex chip
The resource distribution of work communication, and a kind of corresponding software algorithm is provided, come on the chip platform for only supporting half duplex communication real
The communication modes of existing full duplex.
Wherein, in the solution of the present invention, because only supporting the chip of half duplex communication, most of is all because sending caching
(i.e. UART transmitting-receiving is slow for the general same address buffer (buffer register, buffer register) and reception caching buffer
It deposits).When full duplex communication, chip sends and receives data simultaneously, caches because UART is received and dispatched, the same address buffer can not be simultaneously
Two data are stored, (that is: when carrying out data transmission, while being received, data are not so as to cause data collision is sended and received
It is sent completely and receives and be completed, then receives data deposit UART transmitting-receiving caching buffer and cause to send loss of data), cause
Communication function is chaotic, therefore in the internal resource of half-duplex chip, solve the problems, such as this.
In an optional specific example, one group of UART (i.e. universal asynchronous receiving-transmitting transmitter)+common output mouth+interior is used
Portion's counter simulates UART scheme.
Such as because when resources of chip is limited or practice is needed using multiple groups UART port, and it is unable to satisfy while makes
Realize full duplex communication with two groups of UART ports, then it is contemplated that using internal counter according to different baud rate timing differences when
Between, common output mouth level is controlled to simulate UART sending function, to realize full duplex communication requirement.
Wherein, on function logic, using UART receive capabilities, without the use of its sending function；Sending function is by making
UART timing is simulated with internal counter and common I/O port, reaches and realizes UART sending function.
Specifically, the algorithm steps that external interrupt simulation UART is sent can be such that
Step a, it is powered on and initialized, is set using the common I/O port (i.e. transmission I/O port) of the sending port of simulation UART function
For high level, the counter that initializing need to use (is opened to interrupt and be enabled, counter interrupts entry time, is with 4800bps
Example, then the entry time of counter is 1/4800=0.208ms).
Wherein, open and interrupt enabled, refer to: chip has many resources, during timer, UART are received and UART transmission is all
Disconnected operation；By taking timer as an example, if necessary to use chip timer resource, then needs to open interruption and enable, indicate to open this
A resources of chip signal, chip, which can enter this timer, to interrupt.
Counter interrupts entry time, and refer to: timer is a kind of interruption, after setting, every setting time, into meter
When device interrupt function, handle function in program.
Step b, judge whether to need to send data, if not, with no treatment；If so, then by data to be sent
When being stored in variables A, and calculate check bit, and starting counter counts.
Such as: whether need to send data, can be and provided according to both sides' communications protocol, as user grasps air-conditioning
Make, then operational mode change (may be windscreen change be also likely to be mode change), then need synchronized update communication module air-conditioning
Operational mode, then need to send data at this time.
Wherein, this check bit felt according to the communications protocol of communication two party Module Specification odd, even parity check or
It does not verify, this example is to have check bit, this step is skipped if communications protocol does not have check bit and directly transmits stop bits.
Step c, it is clocked into device interruption, then judges the position number (such as variable B) of data to be sent, and according to judging result
It is handled.That is, it is judged that the data sent set the timer time according to baud rate, timing time is arrived, and is sent next
Data bit simulates UART sending function.
Wherein, it is all a byte that UART, which sends data, for sending data 0x55 (this data is variables A), UART
The data of transmission, data format are as follows: start bit (bit0)+data (0x55)+check bit (bit1 or bit0)+stop bits
(bit1).Here, according to bilateral agreement difference, stop bits can make a bit, be also possible to two bit.
Optionally, if variable B is zero, then it represents that start bit need to be sent, I/O port is sent and set low level.
Optionally, if variable B is not zero and less than 9, then it represents that (variables A is big herein for (such as variables A) position of data to be sent
Small be a byte i.e. 8 bit, variable B is just 1-8, therefore each data bit of variables A can be successively sent using this relationship).
Optionally, if variable B is 9, then it represents that send check bit.
Optionally, if variable B is greater than 9, stop bits is sent, transmission I/O port sets high level, and (stop bits is according to communications protocol
Regulation, send it is primary this example illustrates by taking a stop bits as an example still twice, two stop bits be a multiple stop bits and
), stop bits is sent.
Wherein, after being sent completely, variable B adds 1 certainly.
Step d, such as a frame data are sent completely, then reset variable, are closed timer and are interrupted, are transferred to step b；Such as a frame number
It according to not sent completion, then waits, the tape timer time arrives, and is transferred to step c, continues to send data.
In the solution of the present invention, number is sended and received using two groups of difference UART ports of the chip for supporting half duplex communication
According to, or using one group of UART port and external interrupt simulation UART reception.
The processing and function realized by the controller of the present embodiment essentially correspond to the reality of aforementioned device shown in FIG. 1
Example, principle and example are applied, therefore not detailed place in the description of the present embodiment, it may refer to the related description in previous embodiment,
This will not be repeated here.
Through a large amount of verification experimental verification, using technical solution of the present invention, by using can only support half duplex communication chip
Timer internal resource, may be implemented the communication function of chip full duplex, guarantee that full duplex communication function is normal, reduce simultaneously
At product cost.
According to an embodiment of the invention, additionally providing a kind of data communication method of controller corresponding to controller, such as
The flow diagram of one embodiment of method of the invention shown in Fig. 2.The data communication method of the controller may include: step
S110 and step S120.
At step S110, data are realized based on the UART receive capabilities of UART module itself by UART receiving module
UART receive.
Optionally, the UART module may include: the UART communication resources module of half-duplex chip.
Such as: it is interrupted using the UART communication resources and internal timing of half-duplex chip as completion full duplex communication
Resource distribution, and a kind of corresponding software algorithm is provided, full duplex is realized on the chip platform for only supporting half duplex communication
Communication modes.
Such as: data are sended and received using two groups of difference UART ports of the chip for supporting half duplex communication, or are used
One group of UART port and external interrupt simulation UART are received.
It is at low cost as a result, by using the UART communication resources module of half-duplex chip as UART module, and can
Receive capabilities by realizing data.
At step S120, by a UART module as UART sending module, when simulating the UART transmission of UART module
Sequence or UART sending function based on UART module itself realize that the UART of data is sent.Preferably, the UART sends mould
Block can be used for being simulated the UART transmission timing of UART module by using counter and I/O port or be based on UART module itself
UART sending function, realize data UART send.That is, the simulation UART module, can be used for by using controller
Internal counter and O mouthfuls of exterior I, simulate UART module UART transmission timing or based on UART module itself UART hair
Function is sent, realizes that the UART of data is sent.
Such as: on function logic, using UART receive capabilities, without the use of its sending function；Sending function is by making
UART timing is simulated with internal counter and common I/O port, reaches and realizes UART sending function.
Wherein, the UART sending module may include: the resource module of the controller itself of pending data communication,
Simulation UART module realizes that the UART of data is sent for simulating the UART transmission timing of UART module；Or another UART mould
Block, another UART module realize that the UART of data is sent for the UART sending function based on UART module itself.
Such as: it is a kind of that data-selected scheme is sent by timer simulation UART (i.e. universal asynchronous receiving-transmitting transmitter), utilize half
Duplexing chip realizes full duplex communication function, save the cost；The communication speed of household electrical appliance can also be improved, promoting user makes
With comfort level, customer complaint is reduced.
Such as: using that can only support other resources of the inside of half duplex communication chip, realize the communication function of chip full duplex
Can, guarantee that full duplex communication function is normal, while reducing into product cost.In this way, the solution of the present invention, may be implemented using only
The chip of half duplex communication is supported to realize full duplex communication function.With this solution, the half-duplex core of low cost can be used
Piece reaches the requirement of full duplex communication function, and development is low in cost, improves product competitiveness in the market.
As a result, by making UART module realize receive capabilities, and keep the transmission timing for simulating UART module simulation UART real
Existing sending function, not only realizes the reliable communicating of data, but also reduce costs.
It is alternatively possible to pass through simulation UART module simulation UART module in method of the invention as shown in connection with fig. 3
One embodiment flow diagram of UART transmission timing further illustrates in step S120 through simulation UART module simulation UART
The detailed process of the UART transmission timing of module may include: step S210 to step S230.
Step S210 simulates the UART sending function of the UART module by output module, realizes that data are sent.
Step S220 carries out timing according to setting baud rate scope, obtains timing time by counting module.
Step S230 controls the transmission timing of the output module according to the timing time by control module, realizes
The output module simulates the UART sending function of the UART module.
That is, the realization device of the data communication method, may include: UART module, output module, counting module
And control module.Wherein, output module, counting module and control module are the internal resource modules of controller itself.
As a result, by using the cooperation of output module, counting module and control module, the transmission of simulation UART module is realized
Function, structure is simple, at low cost, and the available guarantee of reliability that data are sent.
Still optionally further, it can be controlled as shown in connection with fig. 4 according to the timing time in method of the invention described defeated
An embodiment flow diagram of the transmission timing of module out further illustrates and controls the output mould according to the timing time
The transmission timing of block (controls the hair of the output module by control module according to the timing time in specifically step S230
Send timing) detailed process, may include: step S310 to step S340.
Step S310 controls the controller power-on initialization, and the port level that the output module is arranged is the first letter
Number, and the counting module is configured by preset interrupt request.Such as: first signal can be high level.
Such as: power-up initializing is set using the common I/O port (i.e. transmission I/O port) of the sending port of simulation UART function
For high level, the counter that need to be used is initialized.
Step S320, it is determined whether need to send data.
Step S330, if desired sends data, then stores data to be sent, calculates the check bit of the data to be sent, and
Start the tally function of the counting module.
Step S340 controls the output module according to preset wave under the timer interrupt control of the counting module
Special rate sends next data bit in the case where timing time arrives, and realizes data with the transmission timing by simulation UART
UART is sent；If being continued waiting for no need to send data.
Such as: judge whether to need to send data, if not, with no treatment；If so, then depositing data to be sent
When entering variables A, and calculate check bit, and starting counter counts.The data that judgement is sent set timer according to baud rate
Time, timing time arrive, and send next data bit, simulate UART sending function.
It is arranged as a result, by the timing of the configuration counting module in power-up initializing, and the starting when needing to send data
Timer interrupt interrupts and then simulates the sending function realization data transmission of UART, and realization makes control module according to timing time control
The transmission timing of output module processed, so that the simulation to UART sending function is precisely and reliable.
More it is alternatively possible to be arrived as shown in connection with fig. 5 according to preset baud rate in timing time in method of the invention
In the case where send an embodiment flow diagram of next data bit, further illustrate according to preset baud rate in timing
Next data bit, which is sent, in the case where time arrival (output module is controlled by control module in specifically step S340
According to preset baud rate timing time arrive in the case where send next data bit) detailed process, may include: step
Rapid S410 and step S420.
Step S410 determines the data bit number of data to be sent in default value range present position.
Step S420 is adjusted or sends corresponding data position according to port level of the position to the output module
Corresponding data after, control the meter that the data bit number increases automatically or closes the counting module after sending stop bits
Number function.Such as: after being sent completely, variable B adds 1 certainly.If a frame data are sent completely, then variable is reset, closed in timer
It is disconnected, it is transferred to step b；It such as the not sent completion of a frame data, then waits, the tape timer time arrives, and continues to send data.
Such as: it is clocked into device interruption, then judges the position number (such as variable B) of data to be sent, and according to judging result
It is handled.
As a result, by the data bit number based on data to be sent in default value range present position to corresponding positions data
Corresponding transmission processing is carried out, so that sending to the data of corresponding data position reliable and accurate.
Further optionally, pass through control module in step S420 according to the position to the port of the output module
Level is adjusted or sends the corresponding data of corresponding data position (that is, data of the control module according to data to be sent
Position number is adjusted or sends corresponding data position to the port level of the output module in default value range present position
Corresponding data), may include following any transmission situation.
The first sends situation: if the data bit number is the lower limit of default value range, sending start bit, i.e., will
The port level of the output module is set to second signal.Such as: second signal can be low level signal.
Such as: if variable B is zero, then it represents that start bit need to be sent, I/O port is sent and set low level.
Second of transmission situation: if the data bit number is greater than the lower limit of default value range and is less than default value
The upper limit of range, then the size order according to the data bit number successively sends each data bit of data to be sent.
Such as: if variable B is not zero and less than 9, then it represents that (such as variables A) position (variables A size herein of data to be sent
Just it is 1-8 for a byte i.e. 8 bit, variable B, therefore can successively sends each data bit of variables A using this relationship).
The third sends situation: if the data bit number is equal to the upper limit of default value range, sending check bit.
Such as: if variable B is 9, then it represents that send check bit.
4th kind of transmission situation: if the data bit number is greater than the upper limit of default value range, sending stop bits, and
The port level of the output module is set to the first signal.
Such as: if variable B is greater than 9, stop bits is sent, transmission I/O port sets high level, and (stop bits is advised according to communications protocol
It is fixed, send it is primary this example illustrates by taking a stop bits as an example still twice, two stop bits be a multiple stop bits and
), stop bits is sent.
As a result, by ensure that each data bits according to hair to the different transmissions of each data bits evidence and processing mode
The accuracy and reliability sent.
The processing and function realized by the method for the present embodiment essentially correspond to the embodiment of aforementioned controllers, principle
And example, therefore not detailed place in the description of the present embodiment, it may refer to the related description in previous embodiment, do not do herein superfluous
It states.
Through a large amount of verification experimental verification, using the technical solution of the present embodiment, by being communicated using the UART of half-duplex chip
Resource and internal timing are interrupted as the resource distribution for completing full duplex communication, and using internal counter according to different bauds
Rate timing different time controls common output mouth level to simulate UART sending function, in the chip for only supporting half duplex communication
Realize the communication modes of full duplex on platform, it is at low cost, user experience is good.
To sum up, it will be readily appreciated by those skilled in the art that under the premise of not conflicting, above-mentioned each advantageous manner can be certainly
It combined, be superimposed by ground.
The above description is only an embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (12)
1. a kind of data communication apparatus characterized by comprising UART receiving module and UART sending module；Wherein,
The UART receiving module, comprising: a UART module is realized for the UART receive capabilities based on UART module itself
The UART of data is received；
The UART sending module, for simulating the UART transmission timing of UART module or the UART based on UART module itself
Sending function realizes that the UART of data is sent；
Wherein, the UART sending module, comprising: the resource module of the controller of pending data communication itself simulates UART
Module, simulation UART module realize that the UART of data is sent for simulating the UART transmission timing of UART module；Or it is another
UART module, another UART module realize the UART hair of data for the UART sending function based on UART module itself
It send.
2. the apparatus according to claim 1, which is characterized in that the simulation UART module, comprising: output module, counting
Module and control module；Wherein,
The output module realizes that data are sent for simulating the UART sending function of the UART module；
Counting module obtains timing time for carrying out timing according to setting baud rate scope；
Control module realizes the output module for controlling the transmission timing of the output module according to the timing time
Simulate the UART sending function of the UART module.
3. the apparatus of claim 2, which is characterized in that wherein,
The UART module, comprising: the UART communication resources module of half-duplex chip；And/or
The output module, comprising: the I/O port of controller；And/or
The counting module, comprising: the internal timing interrupt resources module of controller.
4. device according to claim 2 or 3, which is characterized in that the control module is controlled according to the timing time
The transmission timing of the output module, comprising:
The controller power-on initialization is controlled, the port level that the output module is arranged is the first signal, and by preset
Interrupt request configures the counting module；
It determines the need for sending data；
If desired data are sent, then store data to be sent, calculate the check bit of the data to be sent, and start the count module
The tally function of block；
Under the timer interrupt control of the counting module, the output module is controlled according to preset baud rate in timing time
Next data bit is sent in the case where arrival, realizes that the UART of data is sent with the transmission timing by simulation UART.
5. device according to claim 4, which is characterized in that the control module controls the output module according to default
Baud rate timing time arrive in the case where send next data bit, comprising:
Determine the data bit number of data to be sent in default value range present position；
After being adjusted according to port level of the position to the output module or send the corresponding data of corresponding data position,
Control the tally function that the data bit number increases automatically or closes the counting module after sending stop bits.
6. device according to claim 5, which is characterized in that the control module is according to the position to the output mould
The port level of block is adjusted or sends the corresponding data of corresponding data position, comprising:
If the data bit number is the lower limit of default value range, start bit is sent, i.e., by the port of the output module
Level is set to second signal；
If the data bit number is greater than the lower limit of default value range and is less than the upper limit of default value range, according to institute
The size order for stating data bit number successively sends each data bit of data to be sent；
If the data bit number is equal to the upper limit of default value range, check bit is sent；
If the data bit number is greater than the upper limit of default value range, stop bits is sent, and by the end of the output module
Mouth level is set to the first signal.
7. a kind of controller characterized by comprising the data communication apparatus as described in claim 1-6 is any.
8. a kind of data communication method of controller as claimed in claim 7 characterized by comprising
Data are realized based on the UART receive capabilities of UART module itself as UART receiving module by a UART module
UART is received；
By UART sending module, simulates the UART transmission timing of UART module or the UART based on UART module itself is sent
Function realizes that the UART of data is sent；
Wherein, the UART sending module, comprising: the resource module of the controller of pending data communication itself, the simulation
UART module realizes that the UART of data is sent for simulating the UART transmission timing of UART module；Or another UART module, it should
Another UART module realizes that the UART of data is sent for the UART sending function based on UART module itself.
9. according to the method described in claim 8, it is characterized in that, the UART hair for passing through simulation UART module simulation UART module
Send timing, comprising:
By output module, the UART sending function of the UART module is simulated, realizes that data are sent；
By counting module, timing is carried out according to setting baud rate scope, obtains timing time；
By control module, the transmission timing of the output module is controlled according to the timing time, realizes the output module
Simulate the UART sending function of the UART module.
10. according to the method described in claim 9, it is characterized in that, controlling institute according to the timing time by control module
State the transmission timing of output module, comprising:
The controller power-on initialization is controlled, the port level that the output module is arranged is the first signal, and by preset
Interrupt request configures the counting module；
It determines the need for sending data；
If desired data are sent, then store data to be sent, calculate the check bit of the data to be sent, and start the count module
The tally function of block；
Under the timer interrupt control of the counting module, the output module is controlled according to preset baud rate in timing time
Next data bit is sent in the case where arrival, realizes that the UART of data is sent with the transmission timing by simulation UART.
11. according to the method described in claim 10, it is characterized in that, controlling the output module according to pre- by control module
If baud rate timing time arrive in the case where send next data bit, comprising:
Determine the data bit number of data to be sent in default value range present position；
After being adjusted according to port level of the position to the output module or send the corresponding data of corresponding data position,
Control the tally function that the data bit number increases automatically or closes the counting module after sending stop bits.
12. according to the method for claim 11, which is characterized in that by control module according to the position to the output
The port level of module is adjusted or sends the corresponding data of corresponding data position, comprising:
If the data bit number is the lower limit of default value range, start bit is sent, i.e., by the port of the output module
Level is set to second signal；
If the data bit number is greater than the lower limit of default value range and is less than the upper limit of default value range, according to institute
The size order for stating data bit number successively sends each data bit of data to be sent；
If the data bit number is equal to the upper limit of default value range, check bit is sent；
If the data bit number is greater than the upper limit of default value range, stop bits is sent, and by the end of the output module
Mouth level is set to the first signal.
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