JP4754074B2 - Circuit device and method for configuring interface of control device or adjustment device - Google Patents

Description

[0001]
The present invention provides an interface for an electronic controller of a controller or regulator, in particular a vehicle control system such as ABS, EBD, TCS or ESP, to a signal transmission system, in particular a serial vehicle bus system such as a CAN bus, by means of an interface module It is related with the circuit apparatus for comprising. The invention further provides a control or regulating device, in particular an ABS, for a signal transmission system, in particular a serial vehicle bus system, such as a CAN bus, where the interface is provided and adaptable by an interface module for the signal transmission system. It relates to a method for configuring the interface of an electronic controller of a vehicle control system such as EBD, TCS or ESP.
[0002]
Recently, according to the technical development of vehicles, especially automobiles, for example, driving safety systems (anti-lock system (ABS), traction slip control system (TCS) or electronic braking force distribution (EBD)), driving dynamics control (ESP), By using electronic control systems or regulation systems such as electronic engine controllers and driver information communication systems, functionality, ease of operation, comfort and safety are greatly improved. As a result, data exchange between electronic components is greatly increased. This significantly increases the number and length of conductive lines and the number of electrical plug joints in the network system. Conventional cable laying techniques can hardly cope with the required data exchange between individual control devices and operating elements, sensors and consumer / actuators (eg motors, valves or display elements).
[0003]
This problem can be solved by using a serial bus system. For use in automobiles, special bus systems, in particular so-called “CAN buses” (controller area networks described in ISO 11 519-2 and ISO 11 898), so-called “SCP buses”, so-called “VAN buses” or The so-called “JI850 bus” was developed. In doing so, the controller or coordinator in the bus system, i.e. the microcomputer, communicates with the other system components via the interface and the bus. For this purpose, signal lines and electronic / electrical assemblies such as signal converters, transmitters, receivers and controllers are provided. This controller detects or outputs individual signals or reports (messages containing multiple signals) or directly starts or stops the electrical consumer / actuator.
[0004]
The CAN bus has been accepted as a standard, especially for use in automobiles. In the case of a CAN bus, a plurality of control or regulation devices having the same rights are connected to each other by a serial bus structure. Connections between individual subscribers and bus structures are made via bus nodes. The bus node substantially consists of a control device or adjustment device and an interface module (interface controller).
[0005]
Data for individual message processing and signal processing and initialization parameters for interface configuration are implemented so as not to be changed to a control program or adjustment program of a control device or adjustment device (microcomputer).
[0006]
Depending on the stored data for individual message processing and signal processing or initialization parameters for the interface, the bus operation method (output driver operation method and interface state) by the microprocessor using the interface module Is adjusted at the start.
[0007]
Changing the implemented interface configuration is relatively expensive. In other words, new programming of the microprocessor, followed by compiling and linking of the current program 2 is required.
[0008]
An object of the present invention is to improve a known circuit device and a known method for constructing an interface of a control device or a regulating device, in particular an electronic controller of a vehicle control system, in particular for a signal transmission system such as a CAN bus. It is easy to realize and enables a new configuration that is flexible and safe.
[0009]
This problem is solved according to the invention by the features of the independent claims 1 and 7.
[0010]
Particularly advantageous developments and embodiments of the invention are described in the dependent claims.
[0011]
In the present invention, the circuit device comprises a first memory that is dependent on the control device or the regulating device and has a first signal table, which is substantially all provided to the signal transmission system via the interface. The circuit device comprises a second memory independent of the controller or the regulator and having a second signal table , the signal table representing a current interface Contains data.
[0012]
Thereby, in the present invention, the signal table is divided into two ranges or two signal tables are provided. That is, a first (internal) signal table and a second (external) signal table are provided. The separated table range or tables are attached to the separated memory or memory range. The effect of the present invention is that, unlike the first memory, the second memory or the data stored therein is not directly influenced or constrained by the current program of the controller or the regulator, thereby Basically, it can be changed or adapted relatively easily.
[0013]
The term “two separate memories” means in the present invention that two separate memory modules are provided, and that the separation is realized by two separate memory ranges within one memory module. It means that it is possible.
[0014]
This means that the update process of the data in the second signal table and thus the creation or adaptation of an interface to a predetermined signal transmission system, in particular a vehicle bus system, can be achieved flexibly, quickly and technically simply. is there. An easily modifiable memory such as a RAM memory (especially a buffered RAM memory), a flash memory or an EEPROM memory is used as a module for the second memory.
[0015]
If the data is in a modifiable memory, the data can be changed “offline” or “online”.
[0016]
In the case of a correction referred to herein as the term “offline”, the signal table is changed by a memory component, particularly an external program. The result consists of data or tables in one language that is compatible with the programming language used for the current program of the controller or regulator. Subsequently, this data or table is integrated by compiling and linking the current program. Subsequently, the entire program must be loaded into the control device or the adjustment device or its components, in particular the microprocessor, for example by download.
[0017]
Due to the modification referred to as “online”, in the present invention, the signal table is similarly modified by a memory component, particularly an external program. In this case, the result consists of data or a table, for example in the form of a binary code. This data or table can be loaded directly into the memory of the controller or regulator or the microprocessor. The second signal table in the second memory is preferably modified according to the invention by online modification.
[0018]
However, in the present invention, it is also conceivable to store various variations of the signal table in an uncorrectable memory, such as a ROM, and select a predetermined variation when necessary. This selection is made especially online for the second signal table.
[0019]
The first signal table is preferably formed when generating the controller or regulator program code, ie during compilation and linkage (offline correction). All signals represented in this first signal table can be provided to the signal transmission system, but need not be provided. The first signal table can be easily changed by a memory configuration device, particularly an external program. For example, it can be changed by inserting a new signal or by moving the new signal away. The change is only adopted in the current program 2 or microcomputer of the control device or the coordinator when it is newly translated and linked.
[0020]
In accordance with the present invention in the first signal table, with each of the signal, at least the signal type on the data (e.g., signal set a timer, a reset or a timer, 1 to 16-bit length signal string, block and or constant 1-64 bit length string for), location data (eg RAM address), signal length data, signal origin data (eg RAM address) and special names representing signal function include.
[0021]
The second signal table contains the current interface display and can be easily changed later by the component device, especially an external program. The second signal table includes at least data relating to interface initialization (eg baud rate for transmission rate and bit timing for interface configuration), data relating to the type of message transmitted (eg as transmission pattern or reception pattern). , Time-controlled and / or event-driven report-specific repetition rate), data on the type of report (eg transmission report or reception report), data on the number of signals included in the message (eg on the position and length of the signal in the message) Data) and data relating to the assignment to the data in the first signal table.
[0022]
The circuit arrangement according to the invention and the method according to the invention will be described in detail by way of example with reference to the drawings.
[0023]
The figure schematically shows an embodiment of a circuit arrangement according to the invention.
[0024]
The circuit device shown in FIG. 1 includes an electronic controller of the vehicle control system 1. This vehicle control system includes a program 2 for vehicle control and a RAM memory 3 attached to the program 2. This RAM memory is connected to a reception channel 4 for receiving messages and a transmission channel 5 for transmitting messages. A received channel 4 or a transmitted channel 5 processes, selects and reprocesses a received signal or a signal to be transmitted. The reception channel 4 and the transmission channel 5 are connected to a first memory 7 (internal memory) that depends on the control device or the adjustment device, and a second memory 8 (external memory) that does not depend on the control device or the adjustment device. . The memories 7 and 8 can basically be realized as a memory section of one memory (not shown here). A signal to be selected is stored in the form of a first (internal) signal table in the internal memory or the memory section 7, and data representing an interface is stored in the external memory 8 (second or external). Signal table). The external memory 8 is connected to the interface module 10 via the initialization unit 9. The interface module 10 is connected to the reception channel 4 and the transmission channel 5 via the reception unit 11 and the transmission unit 12. Furthermore, a monitoring unit 13 is provided. This monitoring unit is connected to the receiving unit 11, the transmitting unit 12 and the external memory 8. If necessary, the contents of the external memory 8 can be changed by a memory configuration device (memory configuration device) 14, particularly an external program (broken arrows). The interface module 10 is connected to the bus line 15. Arrows not described in detail indicate the important signal flow or data transmission direction of this device. In accordance with the present invention, all the components of the circuit device described above are implemented by software programs except for the memories 7 and 8 and the interface module 10.
[0025]
When sending a report to the bus system, all external signals associated with it are processed in turn by the transmission channel 5. This external signal means a signal shown in the table of the external memory 8. In this case, firstly, the link to the data of this signal stored in the internal memory 7 is analyzed by the transmission channel 5. Subsequently, the signal is appropriately reprocessed in the transmission channel 5 or the corresponding function is performed, and in some cases the result is stored in the appropriate place in the report.
[0026]
Each message to be sent includes a send timer. This transmission timer is incremented by the transmission unit 12 within a certain time frame. When the transmission timer reaches the value defined in the external table, the message is transmitted by the transmission unit 12 along with its associated signal. At the same time, the transmission timer is reset again.
[0027]
Similarly, messages can be sent in an event driven manner. At that time, an appropriate report is transmitted once by the transmission unit 12 when an event called by the program 2 or the monitoring unit 13 occurs. Event-driven transmission and timer-controlled transmission can be used in combination. A predetermined message having a certain transmission pattern can be transmitted immediately in the case of a predetermined event, for example, a failure (for example, a signal for turning on an alarm lamp in the case of a failure) regardless of a predetermined transmission time.
[0028]
When receiving the report, the received signal is interpreted by the receiving channel 4 according to the data stored in the first and second signal tables. If the message has a timer type signal, this signal is set to the value defined in the first signal table. The timer is decremented within a certain time frame, and the timeout function is called when the value is zero (0). This timeout function means a timeout in particular when a message error occurs or fails.
[0029]
The monitoring unit 13 monitors for message error failures and permanent transmission errors. Special errors that are recognized are remembered. This error means an error relating to another bus node or the entire bus.
[0030]
The use of the memory construction device 14 makes it very easy to change the data of the second signal table, in particular by an external program. Thereby, the interface parameters for communication can be adjusted flexibly and can be changed to be very easy to operate, for example by means of a suitable software program with a well-developed menu program for parameter adjustment. This program advantageously converts the selected interface parameters into compilable code. Since external programs can be advantageously stored in a portable microcomputer (eg, a laptop), modifications can be made directly at the site, eg, a customer or a car in a factory.
[0031]
Subsequently, the second signal table is exchanged by downloading to the second memory 8. This second memory is formed, for example, as a RAM memory or a flash segment. It is also possible to exchange suitable memory modules, for example EPROM memory or EEPROM memory. Further, various sets of the second signal table can be provided in the memory module, and a desired signal table can be selected and updated when necessary.
[0032]
Furthermore, the internal first signal table can be modified in particular by a portable external component. In this case, the correction itself is performed offline.
[0033]
The effect of the invention is in particular that a simple and flexible adaptation to the existing communication interface is possible without direct modification of the program meaning control software or adjustment software. In this case, the second signal table can be mounted very reliably even online. Furthermore, there is an advantage that the data in the first memory indicates a signal pool. All signals are written to this signal pool, so that this signal pool can be used as a standard for various applications. Thus, the communication interface can be generated or adapted quickly and easily. In this case, reports, signals or individual signal data can be inserted, masked or packaged.
[Brief description of the drawings]
FIG. 1 schematically shows an embodiment of a circuit device according to the invention.

Claims (9)

By means of the interface module (10), a signal transmission system (15) or a control or regulation device for a serial vehicle bus system such as a CAN bus or a vehicle control system such as ABS, EBD, TCS or ESP. In the circuit device for configuring the interface of the electronic controller (1) ,
A first memory (7) having a first signal table that is influenced by the control program executed in the electronic controller (1), ie used as an element of the control program;
A second memory (8) having a second signal table that is not affected by the control program executed by the electronic controller (1), that is, not used as an element of the control program;
A determination is made as to whether the received data from the bus line (15) conforms to the first and second signal tables, and if so, a reception channel (4) received by the electronic controller (1);
A determination is made as to whether the transmission data from the electronic controller (1) conforms to the first and second signal tables, and if it conforms, a transmission channel (5) transmitted to the bus line (15) A circuit device. 2. The circuit device according to claim 1, wherein the data in the signal table external to the second memory (8) can be easily changed by the memory configuration device (14) or an external program. The change of the data in the first signal table of the first memory (7) is adopted by the control device or adjustment device (1) or in the current program (2) of the control device or adjustment device (1). The circuit device according to claim 1, wherein the circuit device is employed. The first signal table of the first memory (7) contains, for each signal, at least data relating to the type of signal, the position and length of the signal and the origin of the signal. 4. The circuit device according to any one of 3. Regardless of the current program (2) of the control device or the coordinating device (1), the second signal table of the second memory (8) is at least the initialization of the interface, the type and number of messages sent, the signal Data as to the type of signal, the position and length of the signal in the message, the monitoring information, and the assignment to the data in the first signal table. The circuit device described in 1. 6. The circuit device according to claim 1, wherein the second memory (8) is formed as a RAM memory, a flash memory or an EEPROM memory which is a modifiable memory. By means of the interface module (10), a signal transmission system (15) or a control or regulation device for a serial vehicle bus system such as a CAN bus or a vehicle control system such as ABS, EBD, TCS or ESP. In a method for configuring an interface of an electronic controller (1) ,
A first memory (7) having a first signal table which is influenced by a control program executed in the electronic controller (1), ie used as an element of the program;
And a second memory (8) having a second signal table that is not affected by the program executed by the electronic controller (1), that is, not used as an element of the program.
In the reception channel (4), it is determined whether the reception data from the bus line (15) conforms to the first and second signal tables, and if so, the step received by the electronic controller (1) When,
In the transmission channel (5), it is determined whether or not the transmission data from the electronic controller (1) is compatible with the first and second signal tables, and if so, is transmitted to the bus line (15) And a method comprising: The second signal table data is stored in RAM memory, flash memory or flash segment and replaced or corrected by downloading new data, or the second signal table data is a memory such as EPROM memory or EEPROM memory 8. The method of claim 7 , wherein the method is replaced or corrected by replacing a memory module stored in the module and including a new memory. 9. Method according to claim 7 or 8 , characterized in that the second signal table comprises a plurality of data sets, which are selected and updated in order to replace or correct the interface.

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