CN114500654A - Data forwarding device, power module and data forwarding method - Google Patents
Data forwarding device, power module and data forwarding method Download PDFInfo
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Abstract
The invention is suitable for the technical field of data transmission, and provides a data forwarding device, a power supply module and a data forwarding method. The data forwarding device is connected with a plurality of peripheral devices; the data forwarding device is configured to: receiving request information sent by a requester peripheral; the request information comprises an address of data to be forwarded and an executor ID; loading the address of the data to be forwarded to a first preset cache region of the target executor peripheral so that the target executor peripheral extracts the data to be forwarded according to the information in the first preset cache region for forwarding; the target executor is set as the peripheral corresponding to the executor ID. The invention can reduce the strong coupling among all peripheral equipment, thereby reducing the complexity of a forwarding program and reducing the code amount.
Description
Technical Field
The invention belongs to the technical field of data transmission, and particularly relates to a data forwarding device, a power supply module and a data forwarding method.
Background
No matter fill power module, on-vehicle power module, war article power module or the electric power module in the electric pile, when carrying out the internal design, can design front and back level structure usually, coordinate through serial ports communication between the front and back level to realize power module's normal operating. However, the power module generally only communicates with the CAN externally, and a frame of received client protocol information may be an operation of controlling a front stage, and at this time, a serial communication module (herein, the communication module is referred to as an external device) is required to directly forward the protocol information received by the CAN. Namely, the requester peripheral device makes a data forwarding request, and the executor peripheral device executes a sending task.
When there are multiple requesters and multiple executors, each peripheral may need to request forwarding of multiple data or perform sending of multiple data. Under the 'many-to-many' forwarding mode, the situation is complex and changeable, the coupling between the peripherals is strong, the coupling association is uncertain, and the traditional method for directly contacting the two peripherals to perform data packaging and sending has complex program and large code amount, so improvement is urgently needed.
Disclosure of Invention
In view of this, embodiments of the present invention provide a data forwarding apparatus, a power module, and a data forwarding method, so as to solve the problems in the prior art that when data forwarding is performed between multiple requester peripherals and multiple executor peripherals, coupling between the peripherals is strong, a forwarding program is complex, and a code amount is large.
A first aspect of an embodiment of the present invention provides a data forwarding apparatus, where the data forwarding apparatus is connected to a plurality of peripherals; the data forwarding device is used for:
receiving request information sent by a requester peripheral; the request information comprises an address of data to be forwarded and an executor ID;
loading the address of the data to be forwarded to a first preset cache region of the target executor peripheral so that the target executor peripheral extracts the data to be forwarded according to the information in the first preset cache region for forwarding; the target executor is set as the peripheral corresponding to the executor ID.
Optionally, the request information further includes drive port information;
correspondingly, after the address of the data to be forwarded is loaded into the first preset buffer of the target executor peripheral, the data forwarding device is further configured to:
and loading the information of the driving port into a second preset cache region of the target executor peripheral so that the target executor peripheral extracts the data to be forwarded according to the information in the first preset cache region and selects a corresponding driving port to forward the data to be forwarded according to the information in the second preset cache region.
Optionally, before receiving the request information sent by the peripheral of the requester, the data forwarding apparatus is further configured to:
and registering the ID, the cache area write index address and the drive port information of each connected peripheral.
Optionally, the data forwarding apparatus is specifically configured to:
according to the index address written in the cache region, loading the address of the data to be forwarded into a first preset cache region of the target executor peripheral, and loading the driving port information into a second preset cache region of the target executor peripheral;
and updating the cache area write index address after the loading is finished.
Optionally, the type of the peripheral device includes at least one of:
CAN peripheral equipment, serial port peripheral equipment, network port peripheral equipment, SPI peripheral equipment and IIC peripheral equipment.
A second aspect of embodiments of the present invention provides a power supply module, where the power supply module includes the data forwarding device according to the first aspect, and the data forwarding device is connected to each peripheral in the power supply module.
Optionally, when a peripheral is used as the peripheral of the requester, the peripheral sends request information to the data forwarding device.
Optionally, when a certain peripheral is used as an executor peripheral, determining whether information exists in a cache region of the certain peripheral, and traversing the information in the cache region to forward data if the information exists; the cache region comprises a first preset cache region and a second preset cache region.
A third aspect of the embodiments of the present invention provides a data forwarding method, where the method is used to implement data forwarding between peripheral devices in a power module according to the second aspect;
the method comprises the following steps:
the external equipment of the requester sends request information to the data forwarding device; the request information comprises an address of data to be forwarded and an executor ID;
the data forwarding device loads the address of the data to be forwarded to a first preset cache region of the target executor peripheral; wherein, the target executor is set as the peripheral corresponding to the executor ID;
and the target executor peripheral extracts the data to be forwarded according to the information in the first preset cache region for forwarding.
Optionally, the request information further includes drive port information;
correspondingly, the method further comprises the following steps:
the data forwarding device loads the driving port information into a second preset cache region of the target executor peripheral;
and the target executor peripheral selects a corresponding driving port to forward the data to be forwarded according to the information in the second preset cache region.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
when data forwarding is carried out between the peripheral devices, the peripheral device of the requester and the peripheral device of the executor are not directly contacted, but are contacted through the arranged data forwarding device, so that strong coupling between the peripheral devices is reduced, explicit mutual reference between the peripheral devices is not needed, interaction between the peripheral devices can be independently changed, and the purposes of reducing complexity of a forwarding program and reducing code quantity are achieved.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of a connection structure of a data forwarding apparatus according to an embodiment of the present invention;
FIG. 2 is a diagram of an executor peripheral cache provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of a data forwarding interaction flow provided by an embodiment of the present invention;
fig. 4 is a schematic diagram of an executor peripheral executing a forwarding task according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
In the embodiment of the invention, the power module needs the internal front-stage and rear-stage circuits to operate in a coordinated manner, so that the front-stage and rear-stage circuits are required to be capable of serial communication, the power module only has CAN communication to the outside, the received frame of client protocol information may control the operation of the front-stage circuit, and at the moment, the serial peripheral in the front-stage and rear-stage circuits is required to directly forward the protocol information received by the CAN peripheral. Namely, after receiving the information, the CAN peripheral does not need to directly process the information, but requests other serial peripheral to forward the information, and processes other modules or other parts of the module.
Therefore, a peripheral device needs to have a forwarding capability in addition to its own parsing capability, so as to forward data that is originally owned by another peripheral device to another peripheral device.
When data is forwarded among the plurality of peripheral devices, each peripheral device may need to request a plurality of other peripheral devices to forward data, and each peripheral device may also need to forward data according to the forwarding requests of the plurality of other peripheral devices. I.e. each peripheral may act both as a party to make a forwarding request and as a party to send. In the forwarding mode of "many-to-many", the forwarding situation is complicated and varied, it is conceivable that the coupling between the peripheral devices is strong, the coupling association is uncertain, and depending on the situation, if one of the peripheral devices is slightly changed, the other peripheral device needs to be changed accordingly, for example, if a requester or an executor needs to be added or reduced, the other peripheral device related to the requester or the executor needs to be changed, the peripheral devices are mixed randomly, and the direct coupling and the coupling are strong, which results in a complicated forwarding procedure and a large amount of codes.
Based on the above problem, an embodiment of the present invention provides a data forwarding apparatus.
Referring to fig. 1, the data forwarding apparatus is connected to a plurality of peripherals, i.e., a requester and an executor shown in fig. 1 (the requester is a peripheral that requests to forward data, and the executor is a peripheral that performs data transmission).
The data forwarding device is used for:
receiving request information sent by a requester peripheral; the request information comprises an address of data to be forwarded and an executor ID;
loading the address of the data to be forwarded to a first preset cache region of the target executor peripheral so that the target executor peripheral extracts the data to be forwarded according to the information in the first preset cache region for forwarding; the target executor is set as the peripheral corresponding to the executor ID.
In the embodiment of the invention, the following problems are mainly considered during design: firstly, how the data forwarding device informs the executor of the data requested to be forwarded by the requester and how to accurately match the requester with the executor, that is, screening out the executor matched with the requester from a plurality of executors, and converting 'many-to-many' into 'one-to-one'; secondly, when a plurality of requesters request the same executor to execute the forwarding function, because the executor executes the sending function and calls regularly, the data of the previous requester is not forwarded completely, and the next requester puts forward a new data forwarding request, the problem that the data of the previous requester is covered can be caused.
For the first problem, the data forwarding apparatus of this embodiment receives the request information sent by the peripheral of the requester, and needs to include the address information of the data to be forwarded, so that the executor obtains the data to be forwarded. The address mainly stores the data to be forwarded and the length of the data to be forwarded, so that the executor can send normal amount of data when forwarding the data, and the data are not frequently sent or rarely sent. In addition, the request information also needs to carry an executor ID number, so that the data forwarding device knows which executor peripheral needs to forward data.
For the second problem, in this embodiment, a first buffer area is created in advance in the executor peripheral, where the first buffer area may store information of data to be forwarded requested by different requesters, and the executor peripheral may sequentially read the information of the data to be forwarded in the buffer area to implement forwarding, so as to prevent the data from being covered.
Therefore, through the design, when data forwarding is carried out between the peripheral devices, the peripheral device of the requester and the peripheral device of the executor are not directly contacted, but are contacted through the arranged data forwarding device, so that strong coupling between the peripheral devices is reduced, explicit mutual reference between the peripheral devices is not needed, interaction between the peripheral devices can be independently changed, and the purposes of reducing complexity of a forwarding program and reducing code amount are achieved.
In one possible implementation, the request information further includes drive port information.
Correspondingly, after the address of the data to be forwarded is loaded into the first preset buffer of the target executor peripheral, the data forwarding device is further configured to:
and loading the information of the driving port into a second preset cache region of the target executor peripheral so that the target executor peripheral extracts the data to be forwarded according to the information in the first preset cache region and selects a corresponding driving port to forward the data to be forwarded according to the information in the second preset cache region.
In the embodiment of the present invention, one peripheral often has more than one port, and each port can forward data. When different requesters need the same peripheral as an executor to execute a sending function, the drive ports possibly used are different, so that the data forwarding device loads the drive port information into a second preset cache region of the executor peripheral after receiving the request information by adding the drive port information into the request information, and the executor peripheral can select a corresponding drive port to forward data according to the information in the second cache region.
In one possible implementation, the executor peripheral may select any idle driver port to perform the data forwarding task when the driver port is not specified.
In one possible implementation, the type of peripheral includes, but is not limited to, at least one of: CAN peripheral equipment, serial port peripheral equipment, network port peripheral equipment, SPI peripheral equipment and IIC peripheral equipment. I.e., the requestor and the implementer, may each be any of the several types of peripherals described above, which are not limited in this application.
In one possible implementation, before receiving the request information sent by the requester peripheral, the data forwarding apparatus is further configured to:
and registering the ID, the cache area write index address and the drive port information of each connected peripheral.
In the embodiment of the present invention, each peripheral device needs to register its own ID number, cache area write index address, and drive port number in the data forwarding device in advance, and the data forwarding device can search the corresponding peripheral device as an executor peripheral device and load the related information when receiving the request information of the requester peripheral device.
The peripheral ID number and the driver port number are important for distinguishing which peripheral the executor is, and which port to use for forwarding. The present embodiment makes the following provisions:
the peripheral ID number and the driver port number follow the following rules: X0Y.
X characterizes the peripheral number, i.e. specifies: x ═ 1 represents a serial port, X ═ 2 represents CAN communication, X ═ 3 represents IIC, X ═ 4 represents SPI, X ═ 5 represents a network port, and so on, and the maximum value does not exceed 65. Y characterizes the port number, i.e. specifies: and Y-1 represents a port I, Y-2 represents a port II, and the like, and the maximum value does not exceed 99. The reason why the maximum value of X cannot exceed 65 and the maximum value of Y does not exceed 99 is that the ID number is 16-bit data and the maximum value does not exceed 65536. Where 0 is used as a separator of the peripheral number and the port number, there is no special meaning. For example as shown in table 1:
TABLE 1 peripheral and drive Port code tables
| Serial port 1: id 101 | Serial port 2: id 102 | Serial port 3 id 103 | ....... | Serial port 99 id 1099 |
| CAN1:id＝201 | CAN2:id＝202 | CAN3:id＝203 | ....... | CAN99:id＝2099 |
| ....... | ....... | ....... | ....... | ....... |
In addition, the contents loaded by the first buffer and the second buffer of the executor can be referred to as shown in fig. 2. The establishment of the executor cache region mainly aims to solve the problem of data coverage caused by multiple requester request triggers before the executor sends the data regularly, and solve the problem that the requester triggering the request wants the same executor peripheral to execute sending and the executor port number is uncertain. It should be noted that the establishment of the actor cache is related to the peripheral devices, that is, one peripheral device establishes one actor cache, even though the peripheral device has a plurality of ports, one actor cache is also established. For example, the following steps are carried out: three ports (usart1, usart2 and usart3) are arranged outside a certain serial port, and a cache region is created to be a cache region 1 (a first cache region) and a cache region 2 (a second cache region); four ports (CAN1, CAN2, CAN3 and CAN4) exist in a certain CAN peripheral, and the created cache areas are still one cache area 1 and one cache area 2. Moreover, it can be understood that the length of the created buffer is irrelevant to the number of ports existing in the peripheral, and is relevant to the timing calling time of the executor and the number of times of effective triggering of the requester in the period of time, and the reasonable length can be set according to the requirement. For example, the following steps are carried out: if the executor sends one time in 100ms, and multiple requesters effectively trigger 4 times in the period, the buffer length is at least 4. It is noted that valid triggers are referred to herein as requestor data addresses that can be placed in the executor buffer after ID matching. The content of the buffer may be information of the same executor that appears continuously or intermittently, that is, the first location in the buffer stores information of requester 1, and the second location may also be information of requester 1, where what is stored is uncertain and related to the current situation after ID matching and screening.
In a possible implementation manner, the data forwarding apparatus is specifically configured to:
according to the index address written in the cache region, loading the address of the data to be forwarded into a first preset cache region of the target executor peripheral, and loading the driving port information into a second preset cache region of the target executor peripheral;
and updating the cache area write index address after the loading is finished.
In the embodiment of the invention, the writing index address of the executor peripheral is also changed along with the change of the number of the peripherals, is related to the number of the peripherals and is unrelated to the number of the ports of the executor peripheral.
The embodiment of the invention also provides a power supply module which comprises the data forwarding device, wherein the data forwarding device is connected with each peripheral in the power supply module.
In one possible implementation, when a peripheral device is a requester peripheral device, the request information is sent to the data forwarding apparatus.
In a possible implementation manner, when a certain peripheral serves as an executor peripheral, whether information exists in a cache region of the peripheral is judged, and if the information exists, the information in the cache region is traversed to carry out data forwarding; the cache region comprises a first preset cache region and a second preset cache region.
The embodiment of the present invention further provides a data forwarding method, which is used for implementing data forwarding between the peripheral devices in the power module according to the second aspect.
The method comprises the following steps:
the external equipment of the requester sends request information to the data forwarding device; the request information comprises an address of data to be forwarded and an executor ID;
the data forwarding device loads the address of the data to be forwarded to a first preset cache region of the target executor peripheral; wherein, the target executor is set as the peripheral corresponding to the executor ID;
and the target executor peripheral extracts the data to be forwarded according to the information in the first preset cache region for forwarding.
Optionally, the request information further includes drive port information.
Correspondingly, the method further comprises the following steps:
the data forwarding device loads the driving port information into a second preset cache region of the target executor peripheral;
and the target executor peripheral selects a corresponding driving port to forward the data to be forwarded according to the information in the second preset cache region.
In the embodiment of the present invention, referring to fig. 3, the executor is a pre-registration operation, and is intended to inform the data forwarding apparatus of the capability of the peripheral to execute transmission as the executor. The requester is a triggering operation, and aims to inform the forwarding module that the requester requests a specified executor to perform forwarding, and when the requester makes a request, the requester triggers the data forwarding device to search for the matching-loading-changing node write index. The behavior of the data forwarding device is triggered by a requester, the data forwarding device collects ID information of all peripheral devices with execution capacity, and when the requester specifies a specified executor to execute forwarding, the data forwarding device searches the information from the ID registered in the case and matches the information. Therefore, the dependency of the above process on the executor ID is high, and what the requester ID is, the data forwarding apparatus does not pay attention, and only needs to know which executor requests which executor has operation capability.
The operation of the actor peripheral to perform forwarding may be as shown in figure 4.
The executor peripheral uses the read and write indexes to traverse the executor cache region, if the executor cache region completes traversing, the current process is ended, if not, the cache region data content and the driving port at the current read index position are extracted, the read indexes are accumulated, and finally, the cache region data content is sent out according to the read information. Notably, the read index is an executor's own creation, own management, and operation. When the executor executes sending, the data to be forwarded need to be extracted one by one according to the data address and length provided by the requester until the extraction is completed, and the data length is cleared by 0 in time after the extraction is completed, so that misoperation is prevented. Every time a requester makes a request for data forwarding, the data forwarding device sets the data length of the executor to the length requested by the requester in time, so that the executor performs sending in time.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A data transfer apparatus, wherein said data transfer apparatus is connected to a plurality of peripheral devices; the data forwarding device is configured to:
receiving request information sent by a requester peripheral; the request information comprises an address of data to be forwarded and an executor ID;
loading the address of the data to be forwarded to a first preset cache region of a target executor peripheral so as to enable the target executor peripheral to extract the data to be forwarded according to information in the first preset cache region for forwarding; and the target executor peripheral is a peripheral corresponding to the executor ID.
2. The data forwarding device of claim 1 wherein the request information further comprises drive port information;
correspondingly, after the address of the data to be forwarded is loaded into the first preset buffer of the target executor peripheral, the data forwarding apparatus is further configured to:
and loading the information of the driving port into a second preset cache region of the target executor peripheral so that the target executor peripheral extracts the data to be forwarded according to the information in the first preset cache region and selects a corresponding driving port to forward the data to be forwarded according to the information in the second preset cache region.
3. The data forwarding device of claim 2 wherein prior to receiving the request information sent by the requester peripheral, the data forwarding device is further configured to:
and registering the ID, the cache area write index address and the drive port information of each connected peripheral.
4. The data forwarding device of claim 3, wherein the data forwarding device is specifically configured to:
according to the cache area writing index address, loading the address of the data to be forwarded into a first preset cache area of a target executor peripheral device, and loading the driving port information into a second preset cache area of the target executor peripheral device;
and updating the cache area write index address after the loading is finished.
5. The data forwarding device of claim 1 wherein the type of the peripheral device comprises at least one of: CAN peripheral equipment, serial port peripheral equipment, network port peripheral equipment, SPI peripheral equipment and IIC peripheral equipment.
6. A power supply module comprising a data transfer device according to any one of claims 1 to 5 connected to a respective peripheral device in the power supply module.
7. The power module of claim 6, wherein a peripheral device transmits request information to the data forwarding device when the peripheral device is a requester peripheral device.
8. The power module of claim 6, wherein when a peripheral device is used as an executor peripheral device, determining whether information exists in the buffer, and if so, traversing the information in the buffer for data forwarding; the cache region comprises a first preset cache region and a second preset cache region.
9. A data forwarding method for implementing data forwarding between peripheral devices in a power supply module according to any one of claims 6 to 8;
the method comprises the following steps:
the external equipment of the requester sends request information to the data forwarding device; the request information comprises an address of data to be forwarded and an executor ID;
the data forwarding device loads the address of the data to be forwarded to a first preset cache region of a target executor peripheral; wherein, the target executor peripheral is a peripheral corresponding to the executor ID;
and the target executor peripheral extracts the data to be forwarded according to the information in the first preset cache region for forwarding.
10. The data forwarding method of claim 9 wherein the request information further comprises drive port information;
correspondingly, the method further comprises the following steps:
the data forwarding device loads the drive port information into a second preset cache region of the peripheral of the target executor;
and the target executor peripheral selects a corresponding driving port to forward the data to be forwarded according to the information in the second preset cache region.
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