CN113485957A - Multi-protocol system control device and multi-protocol system control method for physical layer suitable for industrial application scene - Google Patents
Multi-protocol system control device and multi-protocol system control method for physical layer suitable for industrial application scene Download PDFInfo
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Abstract
The embodiment of the invention provides a multi-protocol system control device and a multi-protocol system control method for a physical layer, which are suitable for industrial application scenes. The multi-protocol system control device includes: the bus interface selection module is connected with a system bus, the protocol controller module comprises a plurality of bus protocol controllers and a physical layer interface selector, the bus interface selection module is respectively connected with the plurality of bus protocol controllers in the protocol controller module, and the physical layer interface selector is interacted with a physical layer and is respectively connected with the plurality of bus protocol controllers; the bus interface selection module is used for receiving a downlink transmission signal sent to the physical layer through a system bus and receiving a protocol control selection signal sent to the physical layer from an upper-layer system; the physical layer interface selector is used for receiving a protocol control selection signal sent to a physical layer from an upper layer system, wherein the plurality of bus protocol controllers share the same interface address for the upper layer system.
Description
Technical Field
The embodiment of the invention relates to an embedded system, in particular to a multi-protocol system control device and a multi-protocol system control method for a physical layer, which are suitable for industrial application scenes.
Background
The rapid development of embedded processing technology puts higher and higher requirements on data processing capability and transmission and storage speed, and also brings a serious challenge to the high-speed interconnection of high-performance embedded systems.
In order to improve the transmission capability of the bus, the conventional bus is usually implemented by increasing the width of the data bus or increasing the frequency of the bus. For example, the PCI bus supports 25M, 33M, 50M, and 66M operating frequencies, the PCI-X bus is a bus structure obtained on the basis of the PCI bus structure, and is compatible with the PCI bus in terms of hardware and software, the PCI-X bus can support 32bit and 64bit buses, the operating frequencies of the PCI-X bus are 66M and 133M, and for a 64bit PCI-X bus, if the bus operating frequency is 133MHz, the peak transmission bandwidth can reach 133 × 64 bit-8.512 Gbps.
This solution to the bottleneck problem of data transfer by increasing the bit width and frequency of the conventional bus is not a sensible and feasible solution. For the parallel bus, although the continuous increase of data bit width and bus frequency meets the requirement of people for high-speed data transmission to a certain extent, new problems are brought about at the same time. The excessive number of pins makes chip packaging and layout and routing complicated and difficult, which is one of the problems. Another problem is that when the operating frequency of a conventional bus exceeds 133MHz, it is difficult to support more than two devices on the bus. Adding devices to the bus adds capacitive loading, which means that charge must be filled or drained to achieve the desired signal level. Therefore, the extra capacitance will increase the rise and fall times of the signal, limiting the operating frequency of the bus. In addition, the conventional bus has the problems of clock and signal offset tolerance and the like.
Therefore, with the development of the technology in the electronic industry, especially in the development of transmission interfaces, IEEE1284 is replaced by USB interface, PATA is replaced by SATA, and PCI is replaced by PCI-Express, all of which prove that the speed of the conventional parallel interface has reached a bottleneck, and instead of this, the speed is faster serial interface, so SerDes technology originally used for optical fiber communication becomes the mainstream of the high-speed serial interface. The serial interface mainly applies a differential signal transmission technology, has the characteristics of low power consumption, strong interference resistance and high speed, and theoretically has the highest transmission rate of more than 10 Gbps.
With the wide application of SerDes interfaces, the scene requirements are increasing. In order to meet the requirements of different numbers and protocol types, the problems of selection and integration of upper layer transmission protocols of the SerDes PHY become more and more prominent. Existing IC implementations are basically single protocol interfacing with a single SerDes PHY. Its flexibility and applicability are very limited.
When there are various application scenarios, supporting multi-protocol connection SerDes PHY becomes a problem to be solved.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a multi-protocol system control apparatus and method for a physical layer, which are suitable for industrial application scenarios, so as to support signal transmission of multiple bus protocols through the same multi-protocol system control apparatus.
An aspect of an embodiment of the present invention provides a multi-protocol system control apparatus for a physical layer, which is applicable to an industrial-level application scenario, and includes: the bus interface selection module is connected with a system bus, the protocol controller module comprises a plurality of bus protocol controllers and a physical layer interface selector, the plurality of bus protocol controllers are connected with the bus interface selection module, the bus interface selection module is respectively connected with the plurality of bus protocol controllers in the protocol controller module, and the physical layer interface selector is interactive with the physical layer and is respectively connected with the plurality of bus protocol controllers; the bus interface selection module is used for receiving a downlink transmission signal sent to a physical layer through a system bus and receiving a protocol control selection signal sent to the physical layer from an upper-layer system; the physical layer interface selector is used for receiving a protocol control selection signal sent to a physical layer from an upper layer system. Wherein the plurality of bus protocol controllers share the same interface address for an upper system, wherein, the bus interface selection module is also used for sending the received downlink transmission signal to a corresponding bus protocol controller in the protocol controller module for processing according to the received protocol control selection signal, and transmits the upstream transmission signal processed by the corresponding bus protocol controller to an upper system, wherein, the physical layer interface selector is also used for selecting to send the downlink transmission signal processed by the corresponding bus protocol controller in the protocol controller module to the physical layer for sending according to the received protocol control selection signal, and sending the uplink transmission signal from the physical layer to a corresponding bus protocol controller in the protocol controller module for processing.
Optionally, the bus interface selection module includes a data bus selection unit, and the data bus selection unit is connected to a data bus and connected to a plurality of bus protocol controllers in the protocol controller module, respectively.
Optionally, the bus interface selection module further includes a configuration bus selection unit, and the configuration bus selection unit is connected to a configuration bus or receives a configuration register signal, and is respectively connected to the plurality of bus protocol controllers in the protocol controller module.
Optionally, the number of the multi-protocol system control devices is multiple, each multi-protocol system control device corresponds to a system bus, and the system bus includes at least one data bus and/or at least one configuration bus.
Optionally, the physical layer interface selector interacts with the physical layer and the plurality of bus protocol controllers, respectively, using a PIPE protocol.
Optionally, the protocol control selection signal corresponds to one of a PCIe protocol, a SATA protocol, and a RapidIO protocol.
Another aspect of the embodiments of the present invention provides a multi-protocol system control method for a physical layer, which is applicable to an industrial-level application scenario, and the method is used for any one of the aforementioned multi-protocol system control apparatuses, and includes: when receiving a protocol control selection signal sent to a physical layer from an upper system, the bus interface selection module switches a downlink transmission signal sent to the physical layer through a system bus to a bus protocol controller corresponding to the protocol control selection signal, the physical layer interface selector sends the downlink transmission signal processed by the corresponding bus protocol controller in the protocol controller module to the physical layer for sending, the physical layer interface selector sends an uplink transmission signal from the physical layer to the corresponding bus protocol controller in the protocol controller module for processing, and the bus interface selection module sends the uplink transmission signal processed by the corresponding bus protocol controller to the upper system.
Optionally, the bus interface selection module includes a data bus selection unit, the data bus selection unit is connected to the data bus and respectively connected to a plurality of bus protocol controllers in the protocol controller module, wherein when signal transmission occurs on the data bus, a protocol control selection signal from an upper layer of the system is provided to the data bus selection unit, and the data bus selection unit sends the received downlink data signal to a corresponding bus protocol controller in the protocol controller module for processing according to the received protocol control selection signal, and sends the uplink data signal processed by the corresponding bus protocol controller to the upper layer of the system.
Optionally, the bus interface selection module further includes a configuration bus selection unit, and the configuration bus selection unit is connected to a configuration bus or receives a configuration register signal, and is respectively connected to the plurality of bus protocol controllers in the protocol controller module. When data transmission occurs on the configuration bus or a configuration register signal is received, a protocol control selection signal from the upper layer of the system is provided for the configuration bus selection unit, the configuration bus selection unit sends the received downlink configuration control signal to a corresponding bus protocol controller in the protocol controller module for processing according to the received protocol control selection signal, and sends the uplink configuration control signal processed by the corresponding bus protocol controller to the upper layer of the system.
Optionally, the physical layer interface selector interacts with the physical layer and the plurality of bus protocol controllers, respectively, using a PIPE protocol.
The multi-protocol system control device and the multi-protocol system control method for the physical layer, which are suitable for industrial application scenes, can support multiple bus protocols in the same multi-protocol system control device 100, and the solution is simple and efficient. In addition, the configuration of the bus protocol can be selected through software implementation, and the method is flexible and convenient.
Drawings
FIG. 1 is a block diagram illustrating the architecture of a multi-protocol system control apparatus 100 suitable for use in industrial-scale application scenarios, according to some embodiments of the present invention;
FIG. 2 is a block diagram illustrating a multi-protocol system control apparatus 100 suitable for use in an industrial-scale application scenario, in accordance with further embodiments of the present invention;
fig. 3 is a flowchart illustrating a multi-protocol system control method according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention is provided in conjunction with the accompanying drawings (like numerals indicate like elements throughout the several views) and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The multi-protocol system control device suitable for the industrial application scene is arranged in the embedded system and runs at the bottom layer of the embedded system. In particular, at the interface layer between the operating system and the physical layer. The multi-protocol system control device is provided with a bus protocol controller capable of supporting various bus protocols, and carries out protocol switching and control on a downlink transmission signal and an uplink transmission signal transmitted through a system bus according to the used bus protocols, so that data transmission of various buses can be supported.
In the solution according to an embodiment of the invention, in order to make the same multi-protocol system control device support multiple bus protocols, the control end performing bus operations in the embedded system provides a protocol control selection signal indicating the type of the bus protocol to the multi-protocol system control device according to the protocol type of the system bus.
Fig. 1 is a block diagram illustrating a multi-protocol system control apparatus 100 suitable for use in an industrial-scale application scenario according to some embodiments of the present invention.
Referring to fig. 1, a multi-protocol system control apparatus 100 suitable for an industrial-level application scenario includes a bus interface selection module 110 and a protocol controller module 120. The bus interface selection module 110 is configured to interface with an upper system for signal transmission with a bus; the protocol controller module 120 is configured to implement switching control of a bus protocol under the control of the bus interface selection module 110; the physical layer interface selector 122 is used to interact with the physical layer 500.
Specifically, the bus interface selection module 110 is connected to a system bus, and the protocol controller module 120 includes a plurality of bus protocol controllers 121(121-1, 121-2, …, 121-n) and a physical layer interface selector 122 connected to the bus interface selection module 110; the bus interface selection module 110 is respectively connected with a plurality of bus protocol controllers 121(121-1, 121-2, …, 121-n) in the protocol controller module 120, and the physical layer interface selector 122 interacts with the physical layer 500 and is respectively connected with the plurality of bus protocol controllers 121(121-1, 121-2, …, 121-n).
As described above, the upper layer system (i.e., the control side that issues an instruction in the embedded system) of the multi-protocol system control apparatus 100 can recognize the type of the system bus to which the bus interface is connected, and provide the multi-protocol system control apparatus 100 with a protocol control selection signal indicating the type of the bus protocol when signal transmission occurs, or, when the CPU of the embedded system issues an instruction for configuring a register of the system layer, the register can serve as the protocol control selection signal. The protocol control select signal is passed to the bus interface select block 110 and the physical layer interface selector 122.
Accordingly, the bus interface selection module 110 is configured to receive a downlink transmission signal sent to the physical layer 500 through the system bus and receive a protocol control selection signal sent to the physical layer 500 from an upper system.
The physical layer interface selector 122 is also used for receiving the protocol control selection signal transmitted to the physical layer 500 from the upper system.
According to an exemplary embodiment of the present invention, the PIPE protocol may be used for interaction between the physical layer interface selector 122 and the physical layer 500 and between the physical layer interface selector 122 and the plurality of bus protocol controllers 121(121-1, 121-2, …, 121-n).
Further, for the upper layer system, the plurality of bus protocol controllers 121121(121-1, 121-2, …, 121-n) share the same interface address. That is, at the system level, the same interface address is used for signal transmission through the system bus, so that the internal protocol switching of the multi-protocol system control device 100 is transparent to the upper system.
The protocol switching process of the multi-protocol system control device 100 when signal transmission occurs on the system bus will be described in detail below.
When the signal transmission occurs to the system bus, the upper layer system transmits a protocol control selection signal indicating the type of the bus protocol to the multiprotocol system control apparatus 100.
At this time, the bus interface selection module 110 sends the received downlink transmission signal to the corresponding bus protocol controller 121 in the protocol controller module 120 for processing according to the received protocol control selection signal, and the physical layer interface selector 122 selects to send the downlink transmission signal processed by the corresponding bus protocol controller 121 in the protocol controller module 120 to the physical layer 500 for sending according to the received protocol control selection signal. Here, the corresponding bus protocol controller 121 in the protocol controller module 120 performs corresponding processing on the downlink transmission signal as in the conventional bus protocol controller. Specifically, when receiving downlink data transmitted from the system bus, the bus protocol controller module processes the received downlink data and information such as commands and descriptions into a format and a sequence specified by a protocol according to corresponding protocol requirements, and then converts the format and the sequence into a physical layer interface time sequence to transmit the physical layer interface time sequence. For example, the PCIE protocol controller converts information such as received downlink data into a TLP packet, stores the TLP packet inside, and then sequentially sends the TLP packet to the physical layer interface.
Thereafter, when receiving the uplink transmission signal from the physical layer 500, the physical layer interface selector 122 sends the uplink transmission signal from the physical layer 500 to the corresponding bus protocol controller 121 in the protocol controller module 120 for processing according to the received protocol control selection signal, and the bus interface selection module 110 sends the uplink transmission signal processed by the corresponding bus protocol controller 121 to the upper layer system according to the received protocol control selection signal. Similarly, the corresponding bus protocol controller 121 in the protocol controller module 120 performs corresponding processing on the uplink transmission signal as the existing bus protocol controller.
Therefore, the signal transmission interaction between the primary bus and the physical layer is completed.
According to the embodiment of the invention, a plurality of bus protocols can be supported in the same multi-protocol system control device 100, and the solution is simple and efficient. In addition, the configuration of the bus protocol can be selected through software implementation, and the method is flexible and convenient.
The system bus is divided into a data bus for data transmission and a configuration bus for bus configuration, and the system also sends configuration signals through a configuration register.
Accordingly, according to an alternative embodiment of the present invention, as shown in fig. 2, the bus interface selection module 110 includes a data bus selection unit 111, and the data bus selection unit 111 is connected to the data bus and respectively connected to the plurality of bus protocol controllers 121121(121-1, 121-2, …, 121-n) in the protocol controller module 120.
When signal transmission occurs on the data bus, the bus interface selection module 110 provides a protocol control selection signal from an upper layer of the system to the data bus selection unit 111, and the data bus selection unit 111 sends the received downlink data signal to the corresponding bus protocol controller 121 in the protocol controller module 120 for processing according to the received protocol control selection signal, and sends the uplink data signal processed by the corresponding bus protocol controller 121 to the upper layer of the system.
Furthermore, according to an alternative embodiment of the present invention, the bus interface selection module 110 further comprises a configuration bus selection unit 112, the configuration bus selection unit 112 is connected to the configuration bus or receives the configuration register signal, and is respectively connected to the plurality of bus protocol controllers 121121(121-1, 121-2, …, 121-n) in the protocol controller module.
When data transmission occurs on the configuration bus or a configuration register signal is received, a protocol control selection signal from an upper layer of the system is provided to the configuration bus selection unit 112, and the configuration bus selection unit 112 sends the received downlink configuration control signal to a corresponding bus protocol controller 121 in the protocol controller module 120 for processing according to the received protocol control selection signal, and sends an uplink configuration control signal processed by the corresponding bus protocol controller 121 to the upper layer of the system.
The multi-protocol system control device of the embodiment of the invention can support the existing serial bus protocols such as PCIe protocol, SATA protocol, RapidIO protocol and the like, but is not limited to the protocols. Accordingly, the protocol control selection signal provided to the multi-protocol system control apparatus may correspond to one of a PCIe protocol, a SATA protocol, a RapidIO protocol, an SGMII protocol, and the like.
When there are a plurality of system buses connected, the multiprotocol system control apparatus of the present invention may be extended to a plurality of, one system bus for each multiprotocol system control apparatus 100. These system buses may include at least one data bus and/or at least one configuration bus for supporting different bus types.
The embodiment of the invention also provides a multi-protocol system control method for the multi-protocol system control device suitable for the industrial application scene. The processing of the multiprotocol system control method is described below with reference to fig. 3.
Referring to fig. 3, a protocol control selection signal transmitted from an upper system to a physical layer 500 is received, thereby triggering processing of a downlink transmission signal at step S310.
In step S320, the bus interface selection module 110 switches the downlink transmission signal sent to the physical layer 500 through the system bus to the bus protocol controller 121 corresponding to the protocol control selection signal.
In step S330, the physical layer interface selector 122 sends the downlink transmission signal processed by the corresponding bus protocol controller 121 in the protocol controller module 120 to the physical layer 500 for transmission.
In step S340, the physical layer interface selector 122 sends the uplink transmission signal from the physical layer 500 to the corresponding bus protocol controller 121 in the protocol controller module 120 for processing.
In step S350, the bus interface selection module 110 transmits the uplink transmission signal processed by the corresponding bus protocol controller 121 to an upper system.
As mentioned above, the bus interface selection module may include a data bus selection unit 111, and the data bus selection unit 111 is connected to the data bus and respectively connected to the plurality of bus protocol controllers 121(121-1, 121-2, …, 121-n) in the protocol controller module.
When a protocol control selection signal sent from an upper system to the physical layer 500 is received (step S310), that is, when signal transmission occurs on the data bus, the protocol control selection signal from the upper system is provided to the data bus selection unit 111, and in step S320, the data bus selection unit 111 sends the received downlink data signal to a corresponding bus protocol controller 121 in the protocol controller module for processing according to the received protocol control selection signal; in step S330, the physical layer interface selector 122 sends the downlink data signal processed by the corresponding bus protocol controller 121 in the protocol controller module 120 to the physical layer 500 for sending; in step S340, the physical layer interface selector 122 sends the uplink data signal from the physical layer 500 to the corresponding bus protocol controller 121 in the protocol controller module 120 for processing; and, in step S350, the upstream data signal processed by the corresponding bus protocol controller 121 is transmitted to the upper system.
Similarly, the bus interface selection module may further include a configuration bus selection unit 112, and the configuration bus selection unit 112 is connected to the configuration bus or receives the configuration register signal, and is respectively connected to the plurality of bus protocol controllers 121(121-1, 121-2, …, 121-n) in the protocol controller module.
When a protocol control selection signal sent from an upper system to the physical layer 500 is received (step S310), that is, when data transmission occurs on the configuration bus or a configuration register signal is received, the protocol control selection signal from the upper system layer is provided to the configuration bus selection unit 112, and in step S320, the configuration bus selection unit 112 sends the received downlink configuration control signal to a corresponding bus protocol controller 121 in a protocol controller module for processing according to the received protocol control selection signal; in step S330, the physical layer interface selector 122 sends the downlink configuration control signal processed by the corresponding bus protocol controller 121 in the protocol controller module 120 to the physical layer 500 for sending; in step S340, the physical layer interface selector 122 sends the uplink configuration control signal from the physical layer 500 to the corresponding bus protocol controller 121 in the protocol controller module 120 for processing; and, in step S350, the uplink configuration control signal processed by the corresponding bus protocol controller 121 is transmitted to the upper system.
The above embodiments are only for illustrating the embodiments of the present invention and not for limiting the embodiments of the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention, so that all equivalent technical solutions also belong to the scope of the embodiments of the present invention, and the scope of patent protection of the embodiments of the present invention should be defined by the claims.
Claims (10)
1. A multi-protocol system control apparatus for a physical layer suitable for an industrial-level application scenario, comprising:
the bus interface selection module is connected with a system bus, the protocol controller module comprises a plurality of bus protocol controllers and a physical layer interface selector, the plurality of bus protocol controllers are connected with the bus interface selection module, the bus interface selection module is respectively connected with the plurality of bus protocol controllers in the protocol controller module, and the physical layer interface selector is interactive with the physical layer and is respectively connected with the plurality of bus protocol controllers;
the bus interface selection module is used for receiving a downlink transmission signal sent to a physical layer through a system bus and receiving a protocol control selection signal sent to the physical layer from an upper-layer system;
the physical layer interface selector is used for receiving a protocol control selection signal sent to a physical layer from an upper layer system,
wherein the plurality of bus protocol controllers share the same interface address for an upper system,
wherein, the bus interface selection module is further configured to send the received downlink transmission signal to a corresponding bus protocol controller in the protocol controller module for processing according to the received protocol control selection signal, and send the uplink transmission signal processed by the corresponding bus protocol controller to an upper system,
the physical layer interface selector is further configured to select, according to the received protocol control selection signal, to send a downlink transmission signal processed by a corresponding bus protocol controller in the protocol controller module to a physical layer for sending, and send an uplink transmission signal from the physical layer to a corresponding bus protocol controller in the protocol controller module for processing.
2. The multiprotocol system control device according to claim 1, wherein the bus interface selection module comprises a data bus selection unit, and the data bus selection unit is connected with a data bus and respectively connected with a plurality of bus protocol controllers in the protocol controller module.
3. The multi-protocol system control device of claim 2, wherein the bus interface selection module further comprises a configuration bus selection unit, and the configuration bus selection unit is connected to a configuration bus or receives a configuration register signal, and is respectively connected to a plurality of bus protocol controllers in the protocol controller module.
4. The multi-protocol system control device of claim 3, wherein the multi-protocol system control device is a plurality of multi-protocol system control devices, each multi-protocol system control device corresponds to a system bus, and the system bus comprises at least one data bus and/or at least one configuration bus.
5. The multi-protocol system control device of any one of claims 1-4, wherein the physical layer interface selector interacts with the physical layer and the plurality of bus protocol controllers, respectively, using a PIPE protocol.
6. The multiprotocol system control apparatus according to any one of claims 1 to 4, wherein the protocol control selection signal corresponds to one of a PCIe protocol, a SATA protocol, and a RapidIO protocol.
7. A multi-protocol system control method for a physical layer suitable for industrial-level application scenarios, the method being used for the multi-protocol system control device of any one of claims 1-6, comprising:
when receiving a protocol control selection signal transmitted from an upper system to a physical layer,
the bus interface selection module switches the downlink transmission signal sent to the physical layer through the system bus to the bus protocol controller corresponding to the protocol control selection signal, the physical layer interface selector sends the downlink transmission signal processed by the corresponding bus protocol controller in the protocol controller module to the physical layer for sending,
the physical layer interface selector sends the uplink transmission signal from the physical layer to a corresponding bus protocol controller in the protocol controller module for processing, and the bus interface selection module sends the uplink transmission signal processed by the corresponding bus protocol controller to an upper layer system.
8. The multiprotocol system control method according to claim 7, wherein the bus interface selection module comprises a data bus selection unit, the data bus selection unit is connected with a data bus and respectively connected with a plurality of bus protocol controllers in the protocol controller module,
when signal transmission occurs on the data bus, a protocol control selection signal from the upper layer of the system is provided for the data bus selection unit, and the data bus selection unit sends the received downlink data signal to a corresponding bus protocol controller in the protocol controller module for processing according to the received protocol control selection signal and sends an uplink data signal processed by the corresponding bus protocol controller to the upper layer of the system.
9. The multi-protocol system control method of claim 8, wherein the bus interface selection module further comprises a configuration bus selection unit, the configuration bus selection unit is connected to a configuration bus or receives a configuration register signal and is respectively connected to a plurality of bus protocol controllers in the protocol controller module,
when data transmission occurs on the configuration bus or a configuration register signal is received, a protocol control selection signal from the upper layer of the system is provided for the configuration bus selection unit, the configuration bus selection unit sends the received downlink configuration control signal to a corresponding bus protocol controller in the protocol controller module for processing according to the received protocol control selection signal, and sends the uplink configuration control signal processed by the corresponding bus protocol controller to the upper layer of the system.
10. The multi-protocol system control method according to any one of claims 7 to 9, wherein the physical layer interface selector interacts with the physical layer and the plurality of bus protocol controllers respectively using a PIPE protocol.
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