CN114253893A - Transmission circuit, terminal device and signal transmission method - Google Patents
Transmission circuit, terminal device and signal transmission method Download PDFInfo
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Abstract
The disclosure relates to a transmission circuit, a terminal device and a signal transmission method. The transmission circuit includes: the first transmission line is connected with the processing module and the functional module; the second transmission line is connected with the first transmission line through the functional module; the capacitor is connected between the functional module and the grounding point through the second transmission line; the signal voltage of the signal transmitted on the first transmission line is greater than the capacitor voltage of the capacitor, the capacitor is charged, and the electric energy stored by the capacitor is used for working energy consumption when data transmission is carried out on the functional module and the processing module. Through this transmission circuit, can reduce the quantity of wiring in the terminal equipment to can reduce the size at terminal, promote user and use experience.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a transmission circuit, a terminal device, and a signal transmission method.
Background
A General design of a chip is implemented based on a power line, a ground line, and a communication signal line, and the control of the communication signal has many forms, for example, the control is performed through a General Purpose Input/Output (GPIO) port, or through a Mobile Industry Processor Interface (MIPI), or through an I2C bus.
In the above-described various communication control methods, at least three lines are required. However, with the development of communication, in the era of the fifth generation mobile communication technology (5th generation mobile networks, 5G), the demand for active devices is increasing, and communication of each active device requires multiple transmission lines and multiple pairs of pins of a chip to complete transmission, so that challenges are brought to the spatial layout of a terminal, and the lightness, thinness, and integration of equipment are not facilitated.
Disclosure of Invention
The disclosure provides a transmission circuit, a terminal device and a signal transmission method.
According to a first aspect of embodiments of the present disclosure, there is provided a transmission circuit, including:
the first transmission line is connected with the processing module and the functional module;
the second transmission line is connected with the first transmission line through the functional module;
the capacitor is connected between the functional module and the grounding point through the second transmission line;
the signal voltage of the signal transmitted on the first transmission line is greater than the capacitor voltage of the capacitor, the capacitor is charged, and the electric energy stored by the capacitor is used for working energy consumption when data transmission is carried out on the functional module and the processing module.
Optionally, the transmission circuit further includes:
and the control circuit is respectively connected with the processing module and the capacitor and used for switching on the controlled switch on the second transmission line before transmitting signals on the first transmission line or switching off the controlled switch before transmitting signals on the first transmission line according to a transmission control instruction of the processing module, wherein the controlled switch is positioned between the capacitor and the grounding point.
Optionally, the signal transmitted on the first transmission line includes:
a data signal comprising at least: a modulation signal of data to be transmitted and/or a modulation signal indicating a transmission request for data transmission;
and/or the presence of a gas in the gas,
a power supply signal for supplying power to the capacitor through the first transmission line and the second transmission line.
Optionally, the signal transmitted on the first transmission line further includes:
and the synchronous signal is used for synchronizing the transmission of the data signal between the processing module and the functional module.
Optionally, the synchronization signal includes:
a cyclic redundancy code sequence of the predetermined data sequence.
Optionally, the data signal further includes: a transmission start signal and a transmission end signal;
the transmission starting signal is used for marking the beginning of transmitting the modulated signal after the data to be transmitted is modulated;
and the transmission termination signal is used for marking the termination of the transmission of the modulated signal of the data to be transmitted.
Optionally, the transmission start signal includes: a rising edge on the first transmission line from a first level to a second level;
and/or the presence of a gas in the gas,
the transmission termination signal includes: a signal transmitted on the first transmission line falls from the second level to a falling edge of the first level.
Optionally, the first transmission line and the second transmission line are connected in series and then have a predetermined impedance, so that the reflection coefficients of the first transmission line and the second transmission line are greater than a set value.
According to a second aspect of the embodiments of the present disclosure, there is provided a terminal device, including:
a processing module;
a functional module connected to the processing module via the transmission circuit of the first aspect.
According to a third aspect of the embodiments of the present disclosure, there is provided a signal transmission method, including:
be applied to and handle module or functional module, include:
transmitting signals on a first transmission line, wherein the first transmission line is connected between the processing module and the functional module, and when the signal value of the signals transmitted on the first transmission line is greater than the capacitance voltage of a capacitor, the processing module charges the capacitor, wherein the capacitor is connected between the functional module and a grounding point through a second transmission line;
and the electric energy stored by the capacitor is used for working energy consumption when data transmission is carried out on the functional module and the processing module.
Optionally, the transmitting signals on the first transmission line includes: a data signal and a power supply signal; wherein the data signal comprises at least: a modulation signal of data to be transmitted and/or a modulation signal indicating a transmission request for data transmission;
if the method is applied to a processing module, transmitting signals on the first transmission line comprises the following steps:
the processing module sends a power supply signal on the first transmission line before sending a data signal on the first transmission line, wherein the power supply signal is used for charging the capacitor;
and after the preset time length of the power supply signal is transmitted, the processing module transmits the data signal on the first transmission line.
Optionally, the transmitting signals on the first transmission line includes:
and sending a synchronous signal on the first transmission line before transmitting the modulation signal of the data to be transmitted, wherein the synchronous signal is used for carrying out transmission synchronization of the data signal between the processing module and the functional module.
Optionally, the synchronization signal includes: a cyclic redundancy code sequence of the predetermined data sequence.
Optionally, if the method is applied to a processing module, the method further includes:
the processing module sends a control instruction to the control circuit of the capacitor; the control instruction is used for switching on the controlled switch on the second transmission line before the processing module transmits the signal to the functional module, or switching off the controlled switch before the signal is transmitted on the first transmission line, wherein the controlled switch is located between the capacitor and the grounding point.
Optionally, the transmitting signals on the first transmission line includes:
before the processing module transmits the data signal, the processing module sends a transmission starting signal indicating that the data signal starts to be transmitted on the first transmission line;
and after the processing module finishes the data signal, sending a transmission termination signal indicating that the data signal terminates transmission on the first transmission line.
Optionally, the transmission start signal includes: a rising edge on the first transmission line from a first level to a second level;
and/or the presence of a gas in the gas,
the transmission termination signal includes: a signal transmitted on the first transmission line falls from the second level to a falling edge of the first level.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in an embodiment of the present disclosure, when a signal voltage of a signal transmitted on the first transmission line is greater than a capacitor voltage of the capacitor, the capacitor is charged using the first transmission line and the second transmission line; and based on the characteristic that the capacitor can store electric quantity, the electric quantity provided by the capacitor is utilized to realize data transmission through the first transmission line and the second transmission line. The first transmission line and the second transmission line are substantially connected to form a conductive line. Therefore, in the scheme of the disclosure, the capacitor is arranged in the transmission circuit, so that a power line does not need to be additionally arranged, the first transmission line and the second transmission line are utilized to charge and discharge the functional module based on the electricity storage characteristic of the capacitor, the functional module and the processing module in the terminal equipment can normally communicate, the number of wires in the terminal equipment is reduced, the size of the terminal can be reduced, and the user experience is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a transmission circuit according to an embodiment of the present disclosure.
Fig. 2 is a scheme for realizing communication between the function module and the processing module based on an I2C bus.
Fig. 3 is a sequence diagram of an answering mechanism during data transmission in an I2C bus-based communication scheme.
Fig. 4 is an exemplary diagram of data signal transmission according to an embodiment of the disclosure.
Fig. 5 is an equivalent circuit diagram of a transmission circuit in the embodiment of the present disclosure.
Fig. 6is a diagram illustrating an exemplary structure of a micro control unit communicating with a plurality of sensors according to an embodiment of the present disclosure.
Fig. 7 is an exemplary diagram of a signal transmission method according to an embodiment of the disclosure.
Fig. 8 is a block diagram of a terminal shown in an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Fig. 1 is a transmission circuit according to an embodiment of the present disclosure, and as shown in fig. 1, the transmission circuit includes:
a first transmission line 101 connecting the processing module and the functional module;
the second transmission line 102 is connected with the first transmission line 101 through the functional module;
a capacitor 103 connected between the functional module and a ground point via the second transmission line 102;
the signal voltage of the signal transmitted on the first transmission line 101 is greater than the capacitor voltage of the capacitor 103, the capacitor 103 is charged, and the electric energy stored in the capacitor 103 is used for working energy consumption when data transmission is performed on the functional module and the processing module.
In the embodiments of the present disclosure, the transmission circuit may be a circuit applied in a terminal device. The terminal equipment comprises a processing module and a function module. The Processing module may be a Central Processing Unit (CPU) or a Micro Control Unit (MCU). The functional module may be an active device capable of implementing a certain function, such as a radio frequency switch, a Tuner (Tuner), a charged Erasable Programmable Read Only Memory (EEPROM), a temperature sensor, or an infrared sensor. In the embodiment of the disclosure, the communication between the processing module and the functional module is realized through the transmission circuit.
The transmission circuit includes a first transmission line 101, a second transmission line 102, and a capacitor 103. As shown in fig. 1, a first transmission line 101 connects the processing module and the functional module; the second transmission line 102 is connected with the first transmission line 101 through the functional module; the capacitor 103 is connected between the functional module and ground through the second transmission line 102. Based on the above connection relationship, when the signal voltage of the signal transmitted on the first transmission line 101 is greater than the capacitor voltage of the capacitor 103, the capacitor 103 is charged, and it should be noted that the power supply for charging the capacitor 103 is the processing module. The electric energy stored in the capacitor 103 can be used for data transmission between the functional module and the processing module.
It should be noted that, in the embodiment of the present disclosure, data transmission between the functional module and the processing module is bidirectional, and the data transmission between the functional module and the processing module includes: the processing module is used as a data sending end to send data, and the functional module is used as a data receiving end to receive data; the data transmission system also comprises a functional module used as a data transmitting end for transmitting data, and a processing module used as a data receiving end for receiving data.
Fig. 2 IS a scheme for implementing communication between the functional module and the processing module based on I2C bus, and it can be seen from fig. 2 that if I2C bus communication IS used, the functional module (ADT75/SC16IS740) needs to connect at least four lines, namely, data transmission line (SDA), clock synchronization line (SCL), power line (VDD) and ground line (GND).
In the embodiment of the present disclosure, when the signal voltage of the signal transmitted on the first transmission line 101 is greater than the capacitor voltage of the capacitor 103, the capacitor 103 is charged by using the first transmission line 101 and the second transmission line 102; and data transmission is realized through the first transmission line 101 and the second transmission line 102 by using the power provided by the capacitor 103 based on the characteristic that the capacitor 103 can store power. Therefore, in the scheme of the disclosure, the capacitor 103 is arranged in the transmission circuit, so that a power line does not need to be additionally arranged, and based on the electricity storage characteristic of the capacitor 103, the first transmission line 101 and the second transmission line 102 are used for charging and discharging the functional module, so that the functional module and the processing module in the terminal equipment can normally communicate, the number of wires in the terminal equipment is reduced, the size of the terminal can be reduced, and the use experience of a user is improved.
In one embodiment, the transmission circuit further comprises:
and the control circuit 104 is respectively connected with the processing module and the capacitor 103, and is configured to turn on the controlled switch on the second transmission line before a signal is transmitted on the first transmission line or turn off the controlled switch before a signal is transmitted on the first transmission line according to a transmission control instruction of the processing module, where the controlled switch is located between the capacitor and the ground point.
In this embodiment, the transmission circuit further includes a control circuit 104 connected to the processing module and the capacitor 103, respectively. The control circuit 104 is used to control the on or off of a controlled switch, which is located between the capacitor 103 and ground. Because the capacitor stores the electric quantity, the electric quantity will automatically discharge when the circuit is conducted, and in order to reduce the discharge of the capacitor 103, a controlled switch is arranged on the second transmission line, and the controlled switch comprises but is not limited to at least one mos tube or a triode. If a certain amount of power is stored in the capacitor 103, the second transmission line 102 can be disconnected when data transmission is not required on the first transmission line 101, so that the capacitor 103 is disconnected from the ground point, and the capacitor 103 is prevented from discharging to the ground point.
For example, during the signal transmission, the capacitor 103 is charged by the increased level in the data transmission, at this time, the capacitor 103 stores a part of electric quantity, after the signal transmission is finished, the controlled switch is turned off, the electric quantity of the capacitor 103 is retained in the capacitor, and when the signal transmission is performed next time, the electric quantity stored in the capacitor 103 is directly provided for the functional module without charging the capacitor 103 first, so that the communication rate between the processing module and the functional module is increased, and the communication delay is reduced.
In one embodiment, the signal transmitted on the first transmission line comprises:
a data signal comprising at least: a modulation signal of data to be transmitted and/or a modulation signal indicating a transmission request for data transmission;
and/or the presence of a gas in the gas,
a power supply signal for supplying power to the capacitor through the first transmission line and the second transmission line.
In an embodiment of the present disclosure, the signals transmitted on the first transmission line 101 include data signals. The data signal may include a modulation signal of data to be transmitted, where the data to be transmitted refers to data interacted between the processing module and the functional module, and the modulation signal of the data to be transmitted is a coded digital signal. The data signal may further comprise a modulated signal indicating a transmission request for data transmission, the transmission request indicating data transmission comprising a transmission request indicating the start of data transmission and/or a transmission request indicating the end of data transmission.
Furthermore, the signals transmitted on the first transmission line 101 may also comprise a supply signal for supplying power to the capacitance 103 via the first transmission line 101 and the second transmission line 102.
It should be noted that, in the embodiment of the present disclosure, when the signal voltage of the signal transmitted on the first transmission line 101 is greater than the capacitor voltage of the capacitor 103, the capacitor 103 is powered through the first transmission line 101 and the second transmission line 102, and the power supply signal is transmitted on the first transmission line 101; when the signal voltage of the signal transmitted on the first transmission line 101 is less than or equal to the capacitor voltage of the capacitor 103, the data signal is transmitted on the first transmission line 101.
In one embodiment, the signal transmitted on the first transmission line further comprises:
and the synchronous signal is used for synchronizing the transmission of the data signal between the processing module and the functional module.
In this embodiment, the signals transmitted on the first transmission line 101 further include a synchronization signal, and the synchronization signal is used for data synchronization when the processing module and the functional module transmit data signals, so as to improve the accuracy of data transmission.
In one scheme based on I2C bus communication, both data and address transfers of I2C are responded to. The response includes both an "Acknowledgement (ACK)" and a "non-acknowledgement (NACK)" signal. When the device (host or slave) is used as a data receiving end, after receiving one byte of data or address transmitted by the I2C, if the opposite side wants to continue to send data, a response signal needs to be sent to the opposite side, and the sender can continue to send the next data; if the receiving end wants to finish the data transmission, a non-response signal is sent to the opposite side, and the sending side can generate a stop signal after receiving the non-response signal to finish the signal transmission. Wherein, the equipment can be the processing module or the function module of the disclosure. When the host is a processing module, the slave is a functional module; on the contrary, when the master is the function module, the slave is the processing module.
Fig. 3 is a sequence diagram of an answering mechanism during data transmission in an I2C bus-based communication scheme. As shown in fig. 3, in the data transmission process, after the receiving side receives one byte of data or address based on the synchronization signal of the clock synchronization line (SCL), an "acknowledgement" or "non-acknowledgement" signal is fed back to the sending side to inform the sending side that the data reception is successful and whether the data transmission needs to be continued.
In the embodiment of the present application, a synchronization signal may be transmitted before transmitting a data signal, if there are multiple data signals, a synchronization signal may be transmitted before the multiple data signals, and the data signals may be transmitted on the first transmission line 101 uninterruptedly in a time domain, and as a functional module or a processing module of a receiving end, the data signals are located according to the position of the synchronization signal, and different data signals are distinguished, so that data transmission is performed without ACK and NACK acknowledgements.
It can be understood that the communication mode based on the I2C bus requires the clock synchronization line to independently transmit the synchronization signal for the receiving side to feed back the signal. In the present application, the first transmission line is used to transmit the synchronization signal without independently providing the clock synchronization line, so that the number of wires in the terminal device can be further reduced, thereby reducing the size of the terminal.
In one embodiment, the synchronization signal may also be a signal inserted into a fixed position in the transmission data, and the sending end and the receiving end have already defined the value of the synchronization signal in advance. For example, the sending end inserts a synchronization signal into the 4 th bit of the data to be transmitted, and after the receiving end decodes the data, it is determined whether the synchronization signal of the 4 th bit is a predetermined value, and if the synchronization signal is the predetermined value, it indicates that the data transmission synchronization is successful; if the 4 th bit of the synchronization signal is not the predetermined value, it indicates that the data transmission synchronization is failed.
In another embodiment, the synchronization signal includes:
a cyclic redundancy code sequence of the predetermined data sequence.
In this embodiment, the synchronization signal is a cyclic redundancy code sequence of a predetermined data sequence. The predetermined data sequence comprises a sequence formed by a modulation signal of data to be transmitted and also comprises a predetermined check sequence. The CRC encoded sequence is a fixed-bit Check code generated based on a Cyclic Redundancy Check (CRC). For example, if a sequence formed by a modulation signal of data to be transmitted is denoted as m (x), and the predetermined check sequence is g (x), the remainders of m (x) and g (x) can be used as the cyclic redundancy code sequence.
When the synchronization signal is a cyclic redundancy code sequence, the data transmitting end may add the cyclic redundancy code sequence to the tail of the modulation signal of the data to be transmitted and transmit the modulated signal to the data receiving end. After the data receiving end receives the data, the received data is decoded to determine whether the data is successfully synchronized. For example, the data receiving end divides the received data by a predetermined check sequence g (x), and if the division is completed (remainder is 0), it indicates that the data synchronization is successful.
It can be understood that, as shown in fig. 3, the communication mode based on the I2C bus adopts an acknowledgement mechanism, and the sender and the receiver need to confirm whether the data synchronization is successful or not. In the embodiment, a CRC check mode is adopted, a communication mode is changed, whether data synchronization succeeds or not is checked while data transmission is carried out, and a process of back-and-forth confirmation is omitted, so that the communication efficiency can be improved.
In one embodiment, the data signal further comprises: a transmission start signal and a transmission end signal;
the transmission starting signal is used for marking the beginning of transmitting the modulated signal after the data to be transmitted is modulated;
and the transmission termination signal is used for marking the termination of the transmission of the modulated signal of the data to be transmitted.
As previously mentioned, the data signal includes a modulated signal indicating a transmission request for data transmission. The adjustment signal indicating the transmission request for data transmission may include a transmission start signal for marking the start of transmission of the modulated signal modulated by the data to be transmitted, and may further include a transmission end signal for marking the end of transmission of the modulated signal modulated by the data to be transmitted.
It is understood that, in this embodiment, the data signal transmitted on the first transmission line 101 further includes a transmission start signal and a transmission end signal, so that the data receiver can determine whether the data transmission is ended or not according to the signals, and thus the communication efficiency can be improved.
In one embodiment, the transmission start signal includes: a rising edge on the first transmission line from a first level to a second level;
and/or the presence of a gas in the gas,
the transmission termination signal includes: a signal transmitted on the first transmission line falls from the second level to a falling edge of the first level.
In this embodiment, the second level is greater than the first level. When the rising edge of the signal transmitted on the first transmission line rises from the first level to the second level, the signal is a transmission starting signal which marks that the modulation signal modulated by the data to be transmitted begins to be transmitted; when the signal transmitted on the first transmission line falls from the second level to the falling edge of the first level, the signal is a transmission termination signal for marking the termination of the transmission of the modulated signal modulated by the data to be transmitted.
Fig. 4 is an exemplary diagram of data signal transmission in an embodiment of the disclosure, as shown in fig. 4, data to be transmitted is transmitted after being encoded by a 64-bit CRC coding sequence (CRC64) at a transmitting end, a receiving end determines that data starts to be transmitted according to a rising edge (S1) of a received waveform, and determines that data transmission ends according to a falling edge (S2) of the received waveform. After the data transmission is finished, the receiving end uses the CRC64 to check whether the received data is the original data to be transmitted.
In one embodiment, the first transmission line and the second transmission line are connected in series to have a predetermined impedance, so that the reflection coefficients of the first transmission line and the second transmission line are greater than a set value.
In this embodiment, the first transmission line 101 and the second transmission line 102 are connected in series and then have a predetermined impedance, so that the reflection coefficients of the first transmission line 101 and the second transmission line 102 are greater than a predetermined value, and thus the capacity of the capacitor 103 is sufficiently large, and the energy stored in the capacitor can provide sufficient electric quantity for the functional module to stimulate the functional module to operate.
Fig. 5 is an equivalent circuit diagram of a transmission circuit in the embodiment of the present disclosure, as shown in fig. 5, the capacitor 103 is connected to the functional module (Z) through the second transmission line 102, and the functional module is connected to the processing module (the processing module is not shown in fig. 5) through the first transmission line 101. Wherein the combined impedance of the first transmission line 101 and the second transmission line 102 is Z0, so that the reflection coefficient of the first transmission line 101 and the second transmission line 102 is greater than the set value 2.
It should be noted that the impedances of the first transmission line 101 and the second transmission line 102 are related to the material, thickness and line width of the selected lines. The present disclosure does not limit specific structural parameters of the first transmission line 101 and the second transmission line 102 as long as predetermined impedance values are satisfied.
Fig. 6is a diagram illustrating an exemplary structure of a micro control unit communicating with a plurality of sensors according to an embodiment of the present disclosure. As shown in fig. 6, four sensors are connected to the micro control unit, and the micro control unit and each sensor communicate with each other by the aforementioned transmission circuit. It should be noted that, the micro control unit is the processing module of the present disclosure, and each sensor is the functional module of the present disclosure. When the micro control unit communicates with each sensor, a time-sharing communication mechanism is adopted, namely the micro control unit only communicates with one sensor in a time period, so that the confusion of data in the communication process is reduced.
Fig. 7 is an exemplary diagram of a signal transmission method in an embodiment of the disclosure, where the method is applied to a processing module or a functional module in a terminal device, as shown in fig. 7, and includes the following steps:
s11, transmitting a signal on a first transmission line, wherein the first transmission line is connected between the processing module and the functional module, and when a signal value of the signal transmitted on the first transmission line is greater than a capacitor voltage of a capacitor, the processing module charges the capacitor, wherein the capacitor is connected between the functional module and a ground point through a second transmission line;
and the electric energy stored by the capacitor is used for working energy consumption when data transmission is carried out on the functional module and the processing module.
In the embodiment of the disclosure, the signal transmission method is applied to communication between the processing module and the functional module. The transmission signals on the first transmission line comprise signals sent by the processing module as a data sending end, and the functional module is used as signals received by the data receiving end; the system also comprises a functional module used as a data sending end to send signals, and a processing module used as a data receiving end to receive the signals.
In this embodiment, when the signal voltage of the signal transmitted on the first transmission line is greater than the capacitor voltage of the capacitor, the processing module is used to charge the capacitor, and the electric energy stored in the capacitor can be used for the working energy consumption during the data transmission between the functional module and the processing module. Therefore, the signal transmission method disclosed by the invention has the advantages that based on the electricity storage characteristic of the capacitor, the functional module and the processing module can normally communicate without additionally arranging a power line, the number of wiring in terminal equipment is reduced, the size of the terminal can be reduced, and the use experience of a user is improved.
In one embodiment, transmitting signals on the first transmission line comprises: a data signal and a power supply signal; wherein the data signal comprises at least: a modulation signal of data to be transmitted and/or a modulation signal indicating a transmission request for data transmission;
if the method is applied to a processing module, transmitting signals on the first transmission line comprises the following steps:
the processing module sends a power supply signal on the first transmission line before sending a data signal on the first transmission line, wherein the power supply signal is used for charging the capacitor;
and after the preset time length of the power supply signal is transmitted, the processing module transmits the data signal on the first transmission line.
In this embodiment, the transmission signals on the first transmission line include data signals and power supply signals. When the signal transmission method is applied to the processing module, the processing module sends a power supply signal on the first transmission line to charge the capacitor, and after the processing module sends the power supply signal for a preset time, the electric quantity of the capacitor at the moment may be enough for the functional module to work, so that the processing module transmits a data signal on the first transmission line.
In one embodiment, the transmitting signals on the first transmission line includes:
and sending a synchronous signal on the first transmission line before transmitting the modulation signal of the data to be transmitted, wherein the synchronous signal is used for carrying out transmission synchronization of the data signal between the processing module and the functional module.
In this embodiment, the signals transmitted on the first transmission line 101 further include a synchronization signal, and the synchronization signal is used for data synchronization when the processing module and the functional module transmit data signals, so as to improve the accuracy of data transmission.
According to the data transmission method and device, the synchronous signals are transmitted before the data signals are transmitted, if the data signals exist, the synchronous signals can be transmitted before the data signals, the data signals can be transmitted on the first transmission line 101 uninterruptedly in a time domain and serve as a functional module or a processing module of a receiving end, the data signals are located according to the positions of the synchronous signals, different data signals are distinguished, and therefore data transmission is carried out without ACK and NACK confirmation.
Compared with the communication mode based on the I2C bus, the mode that the clock synchronization line independently transmits the synchronization signal to enable the receiving party to feed back the signal is required, the first transmission line is used for transmitting the synchronization signal, the clock synchronization line does not need to be independently arranged, therefore, the number of the wiring in the terminal equipment can be further reduced, and the size of the terminal can be reduced.
In one embodiment, the synchronization signal includes: a cyclic redundancy code sequence of the predetermined data sequence.
In this embodiment, the synchronization signal is a cyclic redundancy code sequence of a predetermined data sequence, where the predetermined data sequence includes a sequence formed by a modulation signal of data to be transmitted and also includes a predetermined check sequence. The synchronization signal can be sent to the data receiving end by the data sending end adding a cyclic redundancy code sequence at the tail of the modulation signal of the data to be transmitted. After the data receiving end receives the data, the received data is decoded to determine whether the data is successfully synchronized.
With respect to the I2C bus based answering mechanism, the sender and receiver need to acknowledge back and forth whether the data synchronization was successful. In the embodiment, a CRC check mode is adopted, a communication mode is changed, whether data synchronization succeeds or not is checked while data transmission is carried out, and a process of back-and-forth confirmation is omitted, so that the communication efficiency can be improved.
In one embodiment, if the method is applied to a processing module, the method further comprises:
the processing module sends a control instruction to the control circuit of the capacitor; the control instruction is used for switching on the controlled switch on the second transmission line before the processing module transmits the signal to the functional module, or switching off the controlled switch before the signal is transmitted on the first transmission line, wherein the controlled switch is located between the capacitor and the grounding point.
In this embodiment, the controlled switch is located between the capacitance and the ground point. The capacitor stores electric quantity, and the electric quantity can automatically discharge when a circuit where the capacitor is located is conducted, and in order to reduce the discharge of the capacitor, a controlled switch is arranged on the second transmission line. For example, when the signal is transmitted at this time, the capacitor is charged through the increased level in the data transmission, at this time, the capacitor can store a part of electric quantity, after the signal is transmitted at this time, the controlled switch is turned off, the electric quantity of the capacitor can be reserved in the capacitor, and when the signal is transmitted next time, the capacitor is not required to be charged first, the electric quantity stored by the capacitor can be directly used for providing the function module, so that the communication speed between the processing module and the function module is increased, and the communication delay is reduced.
In one embodiment, transmitting signals on the first transmission line comprises:
before the processing module transmits the data signal, the processing module sends a transmission starting signal indicating that the data signal starts to be transmitted on the first transmission line;
and after the processing module finishes the data signal, sending a transmission termination signal indicating that the data signal terminates transmission on the first transmission line.
As previously mentioned, the data signal includes a modulated signal indicating a transmission request for data transmission. The adjustment signal indicating the transmission request for data transmission may include a transmission start signal for marking the start of transmission of the modulated signal modulated by the data to be transmitted, and may further include a transmission end signal for marking the end of transmission of the modulated signal modulated by the data to be transmitted.
It is understood that, in this embodiment, the data signal transmitted on the first transmission line further includes a transmission start signal and a transmission end signal, so that the data receiver can determine whether the data transmission is ended or not based on the signals, and thus the communication efficiency can be improved.
In one embodiment, the transmission start signal includes: a rising edge on the first transmission line from a first level to a second level;
and/or the presence of a gas in the gas,
the transmission termination signal includes: a signal transmitted on the first transmission line falls from the second level to a falling edge of the first level.
In this embodiment, the second level is greater than the first level. When the rising edge of the signal transmitted on the first transmission line rises from the first level to the second level, the signal is a transmission starting signal which marks that the modulation signal modulated by the data to be transmitted begins to be transmitted; when the signal transmitted on the first transmission line falls from the second level to the falling edge of the first level, the signal is a transmission termination signal for marking the termination of the transmission of the modulated signal modulated by the data to be transmitted.
Fig. 8 is a block diagram illustrating a terminal apparatus 800 according to an example embodiment. For example, the device 800 may be a telephone, a computer, etc.
Referring to fig. 8, the apparatus 800 may include one or more of the following components: processing component (processing module) 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component (functionality) 814, and communication component 816. Wherein the processing component 802 and the sensor component 814 communicate based on the transmission circuitry shown in figure 1.
The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operation at the device 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed state of the device 800, the relative positioning of the components, such as a display and keypad of the apparatus 800, the sensor assembly 814 may also detect a change in position of the apparatus 800 or a component of the apparatus 800, the presence or absence of user contact with the apparatus 800, orientation or acceleration/deceleration of the apparatus 800, and a change in temperature of the apparatus 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as Wi-Fi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (16)
1. A transmission circuit, comprising:
the first transmission line is connected with the processing module and the functional module;
the second transmission line is connected with the first transmission line through the functional module;
the capacitor is connected between the functional module and the grounding point through the second transmission line;
the signal voltage of the signal transmitted on the first transmission line is greater than the capacitor voltage of the capacitor, the capacitor is charged, and the electric energy stored by the capacitor is used for working energy consumption when data transmission is carried out on the functional module and the processing module.
2. The transmission circuit of claim 1, further comprising:
and the control circuit is respectively connected with the processing module and the capacitor and used for switching on the controlled switch on the second transmission line before transmitting signals on the first transmission line or switching off the controlled switch before transmitting signals on the first transmission line according to a transmission control instruction of the processing module, wherein the controlled switch is positioned between the capacitor and the grounding point.
3. The transmission circuit according to claim 1 or 2, wherein the signal transmitted on the first transmission line includes:
a data signal comprising at least: a modulation signal of data to be transmitted and/or a modulation signal indicating a transmission request for data transmission;
and/or the presence of a gas in the gas,
a power supply signal for supplying power to the capacitor through the first transmission line and the second transmission line.
4. The transmission circuit of claim 3, wherein the signal transmitted on the first transmission line further comprises:
and the synchronous signal is used for synchronizing the transmission of the data signal between the processing module and the functional module.
5. The transmission circuit according to claim 4, wherein the synchronization signal comprises:
a cyclic redundancy code sequence of the predetermined data sequence.
6. The transmission circuit of claim 5, wherein the data signal further comprises: a transmission start signal and a transmission end signal;
the transmission starting signal is used for marking the beginning of transmitting the modulated signal after the data to be transmitted is modulated;
and the transmission termination signal is used for marking the termination of the transmission of the modulated signal of the data to be transmitted.
7. The transmission circuit according to claim 6, wherein the transmission start signal comprises: a rising edge on the first transmission line from a first level to a second level;
and/or the presence of a gas in the gas,
the transmission termination signal includes: a signal transmitted on the first transmission line falls from the second level to a falling edge of the first level.
8. The transmission circuit according to claim 1 or 2, wherein the first transmission line and the second transmission line have a predetermined impedance after being connected in series, so that the reflection coefficients of the first transmission line and the second transmission line are greater than a set value.
9. A terminal device, comprising:
a processing module;
a functional module connected to the processing module via the transmission circuit as claimed in any one of claims 1 to 8.
10. A signal transmission method is applied to a processing module or a functional module, and comprises the following steps:
transmitting signals on a first transmission line, wherein the first transmission line is connected between the processing module and the functional module, and when the signal value of the signals transmitted on the first transmission line is greater than the capacitance voltage of a capacitor, the processing module charges the capacitor, wherein the capacitor is connected between the functional module and a grounding point through a second transmission line;
and the electric energy stored by the capacitor is used for working energy consumption when data transmission is carried out on the functional module and the processing module.
11. The method of claim 10, wherein transmitting signals on the first transmission line comprises: a data signal and a power supply signal; wherein the data signal comprises at least: a modulation signal of data to be transmitted and/or a modulation signal indicating a transmission request for data transmission;
if the method is applied to a processing module, transmitting signals on the first transmission line comprises the following steps:
the processing module sends a power supply signal on the first transmission line before sending a data signal on the first transmission line, wherein the power supply signal is used for charging the capacitor;
and after the preset time length of the power supply signal is transmitted, the processing module transmits the data signal on the first transmission line.
12. The method of claim 11, wherein transmitting signals on a first transmission line comprises:
and sending a synchronous signal on the first transmission line before transmitting the modulation signal of the data to be transmitted, wherein the synchronous signal is used for carrying out transmission synchronization of the data signal between the processing module and the functional module.
13. The method of claim 12, wherein the synchronization signal comprises: a cyclic redundancy code sequence of the predetermined data sequence.
14. The method of claim 10, wherein if the method is applied to a process module, the method further comprises:
the processing module sends a control instruction to the control circuit of the capacitor; the control instruction is used for switching on the controlled switch on the second transmission line before the processing module transmits the signal to the functional module, or switching off the controlled switch before the signal is transmitted on the first transmission line, wherein the controlled switch is located between the capacitor and the grounding point.
15. The method of claim 10 or 11, wherein transmitting signals on the first transmission line comprises:
before the processing module transmits the data signal, the processing module sends a transmission starting signal indicating that the data signal starts to be transmitted on the first transmission line;
and after the processing module finishes the data signal, sending a transmission termination signal indicating that the data signal terminates transmission on the first transmission line.
16. The method of claim 15, wherein the transmission start signal comprises: a rising edge on the first transmission line from a first level to a second level;
and/or the presence of a gas in the gas,
the transmission termination signal includes: a signal transmitted on the first transmission line falls from the second level to a falling edge of the first level.
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