JP2005047302A - Electronic control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic control device capable of automatically setting wiring connection corresponding to an external connection state. <P>SOLUTION: A switching control unit 37 inside an ECU 3 automatically corresponds to a connection state of an output circuit unit 4 by switching the wiring state inside a connection switching unit 35 to the monitoring wiring, inputting the input signal for monitoring when setting of the connection switching unit 35 is requested, monitoring the output signal from output ports Po1, Po2-Pom of the connection switching unit 35 by a monitor circuit unit 36, determining the connection state of the output switching unit 4 according to the monitoring result, and switching the wiring connection of the connection switching unit 35 based on the result of determination. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic control device capable of switching wiring connections between a plurality of input terminals and a plurality of output drivers, and more particularly to an electronic control device capable of automatically setting wiring connections in accordance with an external connection state.
[0002]
[Prior art]
In recent years, an electronic control device (ECU) is mounted on a vehicle to electronically control various processes necessary for the operation of the vehicle. For example, by applying an ECU to the control of engine ejection and connecting it to a speed sensor, a water temperature sensor, or the like, the amount of gasoline ejection can be controlled in accordance with the speed of the vehicle or the temperature of engine coolant.
[0003]
In such an in-vehicle ECU, input / output signals and processing operations are often different depending on the type of vehicle and the country where the vehicle is traveling. Therefore, in-vehicle ECUs are required to be able to change settings so that different inputs can be received for each vehicle and necessary processing operations can be executed.
[0004]
An FPGA (Field Programmable Gate Array) is widely used as an LSI whose settings can be changed. For example, in Patent Document 1, in order to inspect various semiconductor integrated circuits, an FPGA is interposed between the semiconductor integrated circuit to be inspected and the inspection apparatus, and the setting of the FPGA is changed based on the output of the semiconductor integrated circuit. Thus, an external test circuit for correcting the output is disclosed.
[0005]
Patent Document 2 discloses a digital data processing apparatus that generates and evaluates data corresponding to various IC functions by configuring an input / output unit using an FPGA.
[0006]
Further, Patent Document 3 discloses a circuit monitoring method for monitoring the operation of a part or all of an integrated circuit in an integrated circuit in which internal wiring such as FPGA can be set and changed from the outside.
[0007]
Further, Patent Document 4 discloses a logic module and an integrated circuit in which an output circuit unit is configured by an FPGA, so that it is easy to cope with multiple models and change specifications.
[0008]
[Patent Document 1]
JP 2001-337141 A
[Patent Document 2]
JP-A-11-248804
[Patent Document 3]
JP-A-9-311162
[Patent Document 4]
JP-A-5-252025
[0009]
[Problems to be solved by the invention]
By the way, in the above-described conventional technology, the processing content (internal wiring connection) can be changed using the FPGA, but the change itself basically needs to be performed by the user. In the technique disclosed in Patent Document 1, the processing content can be automatically set according to the input signal, but the output side (inspection apparatus side) is fixed, and there is some change on the inspection apparatus side. Therefore, it is necessary to change the setting by the user or replace the LSI itself.
[0010]
However, when various types of output signals are required for each vehicle type, such as an ECU for a vehicle, even if the setting can be changed by an FPGA or the like, the setting is changed by the user. The burden on the user becomes very large. In particular, in an in-vehicle ECU, since the output destinations are various in addition to the variety of output destinations, the burden of this setting change becomes significant.
[0011]
Therefore, it has been an important issue to realize an electronic control device that automatically changes wiring according to the external wiring status of the connection destination and autonomously supports various output destinations.
[0012]
The present invention has been made to solve the above-described problems of the prior art and to solve the problems, and provides an electronic control device capable of automatically setting a wiring connection corresponding to an external connection state. Objective.
[0013]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve the object, an electronic control device according to claim 1 is an electronic control device capable of switching wiring connections between a plurality of input terminals and a plurality of output drivers. And a monitoring unit for detecting an external connection state with respect to the output driver, and a switching control unit for switching the wiring connection based on a detection result of the monitoring unit.
[0014]
According to the first aspect of the present invention, the electronic control unit detects the external connection state with respect to the output driver, and switches the wiring connection between the input terminal and the output driver based on the detection result.
[0015]
According to a second aspect of the present invention, the electronic control device according to the first aspect of the present invention is the processing means according to the first aspect, wherein the processing means executes predetermined processing on the input signals input from the plurality of input terminals and supplies the input signals to the output driver The switching control means is provided inside the processing means.
[0016]
According to the second aspect of the present invention, the electronic control device includes processing means for executing predetermined processing on an input signal input from the input terminal, and the processing means is connected to the output driver based on the external connection state. Control connection switching.
[0017]
The electronic control device according to a third aspect of the present invention is the electronic control device according to the first aspect, further comprising processing means for executing a predetermined process on the input signals input from the plurality of input terminals. The means is provided independently of the processing means.
[0018]
According to the third aspect of the present invention, the electronic control device switches the wiring connection of the output driver based on the external connection state and the processing means for executing a predetermined process on the input signal input from the input terminal. It has the switching means to control independently.
[0019]
According to a fourth aspect of the present invention, in the electronic control device according to the first, second, or third aspect of the invention, the monitoring means monitors the output signals when the monitoring input signals are input to the plurality of output drivers, respectively. The switching control means determines that output drivers having the same monitoring result are externally connected.
[0020]
According to the invention of claim 4, the electronic control unit monitors the output signal when the monitoring input signal is input to the plurality of output drivers, and the output drivers having the same monitoring result are connected externally. Is determined.
[0021]
An electronic control device according to a fifth aspect of the present invention is the electronic control device according to any one of the first to fourth aspects, wherein the monitor means outputs the same signal as when the input is made to the input terminal. Input to the plurality of output drivers as input monitor signals, monitor the output signals from the output drivers, respectively, and the switching control means determines that output drivers having the same monitoring result are connected externally It is characterized by that.
[0022]
According to the fifth aspect of the present invention, the electronic control device inputs the same signal as that when the input is made to the input terminal to the plurality of output drivers as the input monitor signal, and monitors each output signal from the output driver. Then, it is determined that output drivers having the same monitoring result are connected externally.
[0023]
According to a sixth aspect of the present invention, in the first to fifth aspects of the invention, the processing contents to be executed on the output signal and / or the drive current to be applied to the output signal are stored as specification information. The storage device further includes a specification storage unit, wherein the switching control unit switches the wiring connection based on the specification information and a detection result of the monitoring unit.
[0024]
According to the invention of claim 6, the electronic control device stores the processing contents to be executed on the output signal and the drive current to be given to the output signal as the specification information, and based on the specification information and the monitoring result. The wiring connection is switched.
[0025]
According to a seventh aspect of the present invention, in the electronic control device according to the first to sixth aspects of the present invention, the switching means for switching the wiring connection between the plurality of input terminals and the plurality of output drivers is the plurality of outputs. Each of the plurality of switches includes a plurality of contacts connected to the plurality of input terminals on a one-to-one basis, and connection / disconnection between the general contact and the corresponding output driver. Can be switched.
[0026]
According to the seventh aspect of the present invention, the switch having a plurality of contacts connected to the input terminal in a one-to-one correspondence is provided for the number of output drivers, and the connection between the output driver and the contacts is switched, whereby the input terminal and the output are switched. Switch the wiring connection with the driver.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Exemplary embodiments of an electronic control unit (ECU) according to the present invention will be described below with reference to the accompanying drawings.
[0028]
(Embodiment 1)
First, a schematic configuration of the ECU according to the first embodiment will be described. FIG. 1 is an explanatory diagram for explaining a schematic configuration of a substrate 1 on which an ECU 3 according to the first embodiment is mounted. In FIG. 1, a substrate 1 has external input terminals Ta1, Ta2-Tak, Tal, and external output terminals Td1, Td2-Tdn. Further, the substrate 1 has an input circuit unit 2, an ECU 3 and an output circuit unit 4.
[0029]
The input circuit unit 2 is connected to the external input terminals Ta1, Ta2-Tak, Tal, and after executing predetermined processing on the input signals input from the external input terminals Ta1, Ta2-Tak, Tal, the ECU 3 The internal input terminals Tb1, Tb2 to Tbk, Tbl are input.
[0030]
The ECU 3 executes arithmetic processing based on signals input to the internal input terminals Tb1, Tb2 to Tbk, Tbl, and outputs the result to the output circuit unit 4 via the internal output terminals Tc1, Tc2 to Tcm.
[0031]
The output circuit unit 4 performs predetermined processing on the output signals output from the internal output terminals Tc1, Tc2 to Tcm, and then outputs them from the external output terminals Td1, Td2 to Tdn.
[0032]
Here, the input circuit unit 2 and the output circuit unit 4 differ depending on the vehicle type on which the board 1 is mounted. On the other hand, the ECU 3 is the same regardless of the vehicle type on which the substrate 1 is mounted.
[0033]
Therefore, when creating substrates corresponding to different types of vehicles, only the input circuit unit 2 and the output circuit unit 4 need be set, and the ECU 3 can handle different vehicles without changing the settings.
[0034]
In other words, the ECU 3 has a function of not only responding to the input signal but also automatically executing a setting change corresponding to the connection state of the output circuit 4. The internal configuration of the ECU 3 will be further described.
[0035]
As shown in FIG. 1, the ECU 3 includes ADCs (Analog-Digital Converters) 31 and 32, an arithmetic processing unit 33, a processing circuit 34, a connection switching unit 35, a monitor circuit unit 36, and a switching control unit 37. .
[0036]
The ADCs 31 and 32 convert the input analog signals into digital signals and output them to the arithmetic processing unit 33 or the processing circuit 34. Specifically, the ADC 31 converts an analog signal input from the internal input terminals Tb1 and Tb2 into a digital signal and inputs the digital signal to the arithmetic processing unit 33, and the ADC 32 digitally converts the analog signal input from the internal input terminal Tbk. The signal is converted into a signal and input to the processing circuit 34.
[0037]
A signal input from the internal input terminal Tb3 is directly input to the arithmetic processing unit 33, and a signal input from the internal input terminal Tbl is directly input to the processing circuit 34. The processing circuit 34 performs predetermined processing on the signal input from the ADC 32 and the signal input from the internal input terminal Tbl and outputs the result to the arithmetic processing unit 33 and the connection switching unit 35.
[0038]
The arithmetic processing unit 33 executes predetermined arithmetic processing based on the input from the ADC 31, the input from the internal input terminal Tb 3, and the input from the processing circuit 34, and inputs the calculation result to the connection switching unit 35.
[0039]
The connection switching unit 35 has input ports Pi1, Pi2-Pin and output ports Po1, Po2-Pom. The connection switching unit 35 can switch the connection relationship between the input ports Pi1, Pi2-Pin and the output ports Po1, Po2-Pom. The output ports Po1, Po2 to Pom are connected to the output circuit unit 4 via internal output terminals Tc1 and Tc2 to Tcm.
[0040]
On the other hand, the monitor circuit unit 36 monitors the outputs of the output ports Po 1, Po 2 to Pom, and outputs them to the switching control unit 37. The switching control unit 37 switches the connection state of the connection switching unit 35 based on the output of the monitor circuit unit 36.
[0041]
That is, the switching control unit 37 determines the connection state of the output circuit unit 4 based on the outputs from the output ports Po1, Po2 to Pom monitored by the monitor circuit 36, and switches the internal connection state of the connection switching unit 35.
[0042]
Here, an example of signal processing in the substrate 1 will be described. FIG. 2 is an explanatory diagram for explaining a specific example of processing executed on the substrate 1. In FIG. 1, when the signal input to the external input terminal Ta1 is the analog signal S1, the input circuit unit 2 performs level shift, offset addition, gain control, etc. on the analog signal S1, and the result is An analog signal S2 is input to the internal input terminal Tb1.
[0043]
The analog signal S2 is input to the ADC 31 from the internal input terminal Tb1, converted into a digital signal, and input to the arithmetic processing unit 33 as the digital signal S3. The arithmetic processing unit 33 performs arithmetic processing using the digital signal S3 and other input signals, and as a result, inputs the digital signal S4 to the input port Pi1 of the connection switching unit 35.
[0044]
The connection switching unit 35 gives a predetermined drive current to the signal input to the input port Pi1 according to the internal connection state, and outputs it from one of the output ports Po1, Po2 to Pom.
[0045]
Next, the setting of the connection switching unit 35 by the monitor circuit unit 36 and the switching control unit 37 will be further described. FIG. 3 is an explanatory diagram illustrating the setting of the connection switching unit 35. As shown in the figure, the connection switching unit 35 includes a multiplexer 51 and driving circuits (output drivers) 52a and 52b to 52f therein.
[0046]
The multiplexer 51 receives control from the switching control unit 37 and can arbitrarily set the internal connection state, that is, the wiring between the input ports Pi1, Pi2-Pin and the output ports Po1, Po2-Pom. Further, drive circuits 52a, 52b to 52f are assigned to the various output ports Po1, Po2 to Pom, respectively. Here, the drive circuits 52a and 52b to 52f are circuits that supply the same drive current (for example, 100 mA).
[0047]
When setting the connection switching unit 35, the switching control unit 37 first connects the input port Pi1 and the drive circuit 52a, and disconnects the other input ports and the drive circuit. Next, the monitor input signal S10 shown in FIG. 4 is input to the input port Pi1. Thereafter, output signals from the output ports Po1, Po2 to Pom are monitored by the monitor circuit unit 36 and input to the switching control unit 37.
[0048]
Here, as shown in FIG. 4, the output signal S11 from the output port Po1 is the same as the output signal S12 from the output port Po2, and the output signals S13 to S1m from the output ports Po3 to Pom include waveform data. If not, it can be determined that the output port Po1 and the output port Po2 are connected inside the output circuit unit 4.
[0049]
Next, the input port Pi1 and the drive circuit 52b are connected to input a monitor input signal. Also in this case, the output signal S11 and the output signal S12 show the same waveform, and the other output signals do not include waveform data. Thereafter, by sequentially changing the drive circuit connected to the input port Pi1, it is possible to detect the connection state in the output circuit unit 4 for the output from the other output ports.
[0050]
For example, the output circuit section 4 shown in FIG. 3 has connection portions 4a, 4b, and 4c therein, and connects the output port Po1 and the output port Po2 by the connection portion 4a, and the output ports by the connection portions 4b and 4c. Po3 to Po5 are connected. In this case, when the input port Pi1 is connected to any one of the drive circuit 52c, the drive circuit 52d, and the drive circuit 52e and a monitor input signal is input, the same waveform appears in the output signals S13 to S15, and the other output signals are displayed. No waveform data will appear.
[0051]
Thus, the wiring connection state in the output circuit unit 4 is detected, and the switching control unit 37 sets the multiplexer 51 as shown in FIG. That is, the drive circuit 52a and the drive circuit 52b are simultaneously connected to the input port Pi1, and the drive circuits 52c, 52d, and 52e are simultaneously connected to the input port Pi2.
[0052]
Therefore, a drive current (100 mA) is applied to the signal input from the input port Pi1 from the drive circuit 52a and the drive circuit 52b, respectively, and is output from the output port Po1 and the output port Po2. Thereafter, the output from the output port Po1 and the output from the output port Po2 are combined in the output circuit 4, so that the signal input to the input port Pi1 is finally output with a drive current of 200 mA. It will be.
[0053]
Similarly, a drive current (100 mA) is applied to the signal input from the input port Pi2 from the drive circuit 52c, the drive circuit 52d, and the drive circuit 52e, respectively, and is output from the output ports Po3, Po4, Po5. Thereafter, since the outputs of the output ports Po3 to Po5 are synthesized in the output circuit 4, the signal input to the input port Pi2 is finally output with a drive current of 300 mA.
[0054]
Here, a specific internal configuration of the multiplexer 51 will be described. FIG. 6 is an explanatory diagram for explaining an example of the internal configuration of the multiplexer 51. As shown in the figure, the multiplexer 51 has a plurality of switches (SW1 to SWm) therein. Each switch has n contacts equal to the number of input ports, and the i-th contact (i is a natural number) of each switch is connected to the i-th input port (input port Pii). ing.
[0055]
The multiplexer 51 can switch the connection relationship between the input port and the output port by connecting the terminals of the switches SW1 to SWm and the output ports Po1 to Pom via a drive circuit. In FIG. 6, by connecting the first contact of the switch SW1 to the output port Po1 and connecting the first contact of the switch SW2 to the output port 2, the input port Pi1 is connected to two output ports (output port Po1). , Po2).
[0056]
Next, a processing operation at the time of setting the connection switching unit 35 will be described. FIG. 7 is a flowchart for explaining the processing operation when the connection switching unit 35 is set. As shown in the figure, when the switching control unit 37 receives a setting start request from the connection switching unit 35 (step S101), the switching control unit 37 sets the first drive circuit as an input target of the monitor input signal (step S102). . Next, a monitor input signal is input to the input drive circuit (step S103), and the output of each output port is monitored (step S104).
[0057]
Thereafter, it is determined whether or not the monitor input signal has been input to all the drive circuits (step S105). If there remains a drive circuit to which the monitor input signal is not input (step S105, No), the next Is set as an input target of the monitor input signal (step S106), and the monitor input signal is input (step S103).
[0058]
On the other hand, if the input of the monitor input signal has been completed for all the drive circuits (step S105, Yes), the switching control unit 37 determines the connection state of the output circuit unit 4 (step S107) and switches the connection. The wiring setting of the multiplexer 51 in the unit 35 is executed.
[0059]
In this way, by monitoring the output signal of each output port when a monitor input signal is input to a single drive circuit, the switching control unit 37 detects the connection state of the output circuit 4, and the connection switching unit 35 wiring connections can be set automatically.
[0060]
Therefore, even when the wiring of the output circuit 4 is different, such as when the board 1 is mounted on a different vehicle type, there is no need to change the setting of the ECU 3 by the user, and the wiring is autonomously corresponding to the output circuit 3. Changes can be made.
[0061]
The setting start request shown in step S101 may be configured such that the setting start request is automatically made when the ECU 3 is first turned on, or the connection switching unit 35 is requested to set the setting start request. An input port may be provided, and a setting change may be executed when a signal is input to the input port.
[0062]
As the monitor input signal, an arbitrary signal such as a rectangular wave, a sine wave, or an input signal input during actual substrate operation can be used.
[0063]
Incidentally, in the configuration shown in FIG. 1, the arithmetic processing unit 33 and the switching control unit 37 are provided independently inside the ECU 3, but the implementation of the present invention is not limited to this, for example, The switching control unit may be provided inside the arithmetic processing unit.
[0064]
FIG. 8 is a schematic configuration diagram illustrating a schematic configuration of an ECU provided with a switching control unit inside the arithmetic processing unit. As shown in the figure, the ECU 3a includes ADCs 31 and 32, an arithmetic processing unit 33a, a processing circuit 34, a connection switching unit 35, a monitor circuit unit 36, and a switching control unit 37 therein.
[0065]
The arithmetic processing unit 33a has a switching control unit 37a therein and receives the output of the monitor circuit 36. The switching control unit 37 a sets the wiring connection of the connection switching unit 35 based on the output of the monitor circuit 36. Here, the switching control unit 37a does not need to be realized by a hardware configuration, and may be software executed by the arithmetic processing unit 33a.
[0066]
Since other configurations and operations are the same as those of the ECU 3 shown in FIG. 1, the same components are denoted by the same reference numerals, and description thereof is omitted.
[0067]
As described above, in the first embodiment, the wiring in the connection switching unit 35 is switched to the monitoring wiring state, the monitor input signal is input, and the output is monitored by the monitor circuit unit 35, thereby outputting the output circuit. Since the connection state of the unit 4 is detected and the wiring connection of the connection switching unit 35 is set according to the detected connection state, the wiring connection of the connection switching unit 35 is automatically set according to the connection state of the output circuit unit 4 Can be set to
[0068]
(Embodiment 2)
In the first embodiment, the ECU having the connection switching unit including a plurality of the same drive circuits has been described. However, in the second embodiment, the processing content to be executed on the output signal and the drive current to be applied are determined. A configuration of an ECU that is stored as specification information and uses a plurality of different drive circuits in combination will be described.
[0069]
FIG. 9 is an explanatory diagram illustrating the configuration of the ECU according to the second embodiment. In the figure, the connection switching unit 70 and the switching control unit 37b having the characteristic configuration of the second embodiment, and the monitor circuit unit 36 and the output circuit unit related to the operation of the connection switching unit 70 and the switching control unit 37b. 4 is shown. Since the configuration not shown is the same as that of the substrate 1 shown in FIG. 1, the description thereof is omitted here.
[0070]
As shown in FIG. 9, the switching control unit 37b stores specification data 60 therein. The specification data 60 is information indicating the processing contents to be executed on the output signal and the driving current to be applied. A specific example of the specification data 60 is shown in FIG. As shown in the figure, the specification data 60 stores an input port number, an input signal type, necessary processing, and necessary output in association with each other.
[0071]
For example, the valve control signal is input to the input port Pi1 of the connection switching unit 70, the required processing is “low-pass filter”, and the required output is “aaamA”. Further, the ignition control signal is input to the input port Pi2, the necessary processing is “pull-up”, and the necessary output is “bbbbmA”. Further, the timing control signal is input to the input port Pi3, the necessary processing is “high-pass filter”, and the necessary output is “cccmA”.
[0072]
As described above, since the specification data 60 stores the input port, the type of the input signal, the necessary processing, and the necessary output in association with each other, the switching control unit 37b connects the output circuit unit 4 with the monitor circuit 35. After detecting the state, it is possible to set in detail which drive circuit is connected to the signal applied to which input port and which output port is to be output by referring to the specification data. Here, the drive circuits 72a to 72f are not limited to those having the same drive capability, but include different types of drive circuits.
[0073]
Note that the connection switching unit may use an integrated circuit that can change setting contents such as an FPGA. FIG. 11 is an explanatory diagram illustrating the configuration of the ECU in which the connection switching unit is realized by an FPGA. In FIG. 11, the connection switching unit 80 includes an FPGA 81 therein, and the PFGA 81 includes a drive circuit 82, a filter 83, a resistor 84, a capacitor 85, and the like.
[0074]
In the connection switching unit 80, when there is a wiring setting request from the switching control unit 37b, the drive circuit 82, the filter 83, the resistor 84, the capacitor 85, and the like in the PFGA 81 are connected in combination to perform necessary processing. And drive current.
[0075]
As described above, in the second embodiment, information indicating the processing content to be executed and the drive current to be applied is stored as specification data, and the connection state and specification of the output circuit unit 4 detected by the monitor circuit unit 36. Since the connection switching unit is set based on the data, detailed wiring setting corresponding to the specification can be automatically executed.
[0076]
Therefore, even if the input / output specification is changed, the user only has to rewrite the specification data 60, and the wiring design process and the wiring change process can be omitted, and a highly flexible ECU can be obtained at low cost. it can.
[0077]
【The invention's effect】
As described above, according to the invention of claim 1, the electronic control unit detects the external connection state with respect to the output driver, and switches the wiring connection between the input terminal and the output driver based on the detection result. The electronic control device capable of automatically setting the wiring connection corresponding to the connection state is obtained.
[0078]
According to the invention of claim 2, the electronic control device includes processing means for executing a predetermined process on the input signal input from the input terminal, and the processing means is based on the external connection state of the output driver. Since the switching of the wiring connection is controlled, an electronic control device capable of automatically setting the wiring connection corresponding to the external connection state with a simple configuration is obtained.
[0079]
According to a third aspect of the invention, the electronic control device switches processing means for executing predetermined processing on an input signal inputted from the input terminal, and switching of wiring connection of the output driver based on an external connection state. Therefore, it is possible to obtain an electronic control device capable of automatically setting the wiring connection in accordance with the external connection state.
[0080]
According to the invention of claim 4, the electronic control unit monitors the output signal when the monitoring input signal is input to the plurality of output drivers, and the output driver having the same monitoring result is externally connected. Therefore, it is possible to obtain an electronic control device that can easily and appropriately determine the external connection state and automatically set the wiring connection.
[0081]
According to the invention of claim 5, the electronic control unit inputs the same signal as when input is made to the input terminal to the plurality of output drivers as an input monitor signal, and outputs the output signals from the output drivers, respectively. Monitors and determines that an output driver with the same monitoring result is connected externally, so the external connection status is determined based on the input signal during actual operation, and electronic control that can automatically set the wiring connection There exists an effect that an apparatus is obtained.
[0082]
According to the invention of claim 6, the electronic control unit stores the processing contents to be executed for the output signal and the drive current to be given to the output signal as the specification information, and includes the specification information and the monitor result. In addition, since the wiring connection is switched, an electronic control device capable of automatically setting the wiring connection in detail corresponding to the external connection state can be obtained.
[0083]
According to the invention of claim 7, the electronic control device includes a switch having a plurality of contacts connected to the input terminal in a one-to-one correspondence to the number of the output drivers, and switches the connection between the output driver and the contacts. Thus, since the wiring connection between the input terminal and the output driver is switched, an electronic control device capable of setting the wiring connection with a simple configuration is obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram illustrating a schematic configuration of a board on which an ECU according to a first embodiment is mounted.
FIG. 2 is an explanatory diagram illustrating a specific example of processing executed on the substrate shown in FIG. 1;
FIG. 3 is an explanatory diagram explaining settings of the connection switching unit shown in FIG. 1;
FIG. 4 is an explanatory diagram illustrating a specific example of a monitor input signal and an output signal.
FIG. 5 is an explanatory diagram illustrating a setting example of a connection switching unit illustrated in FIG. 1;
6 is an explanatory diagram illustrating an example of an internal configuration of the multiplexer illustrated in FIG. 3;
FIG. 7 is a flowchart for explaining a processing operation when setting the connection switching unit shown in FIG. 1;
FIG. 8 is a schematic configuration diagram illustrating a schematic configuration of an ECU provided with a switching control unit inside an arithmetic processing unit.
FIG. 9 is an explanatory diagram for explaining a configuration of an ECU according to the second embodiment;
10 is an explanatory diagram for explaining specification data stored in a switching control unit shown in FIG. 9;
FIG. 11 is an explanatory diagram illustrating a configuration of an ECU in which a connection switching unit is realized by an FPGA.
[Explanation of symbols]
1 Substrate
2 Input circuit section
3,3a ECU
4 Output circuit section
4a-4c Connection part
31,32 ADC
33, 33a arithmetic processing unit
34 Processing circuit
35, 70, 80 Connection switching part
36 Monitor circuit section
37, 37a, 37b switching control unit
51, 71 Multiplexer
52a to 52f, 72a to 72f, 82 Drive circuit
60 Specification data
81 FPGA
83 Filter circuit
84 Resistance
85 capacitors
Ta1, Ta2-Tak, Tal External input terminal
Tb1, Tb2-Tbk, Tbl Internal input terminal
Tc1, Tc2-Tck, Tcn Internal output terminal
Td1, Td2 to Tdn External output terminals
Pi1, Pi2-Pin input port
Po1, Po2-Pom output port
S1, S2 Analog signal
S3, S4 Digital signal
S10 Monitor input signal
S11, S12 ~ S1m Output signal
SW1 to SWm switch

Claims (7)

An electronic control device capable of switching wiring connections between a plurality of input terminals and a plurality of output drivers,
Monitoring means for detecting an external connection state to the output driver;
Switching control means for switching the wiring connection based on the detection result of the monitoring means;
An electronic control device comprising: The apparatus further comprises processing means for executing predetermined processing on input signals input from the plurality of input terminals and supplying the processed signals to the output driver, and the switching control means is provided in the processing means. The electronic control device according to claim 1. 2. The processing apparatus according to claim 1, further comprising processing means for executing predetermined processing on input signals input from the plurality of input terminals, wherein the switching control means is provided independently of the processing means. The electronic control device described. The monitoring means monitors each output signal when a monitoring input signal is input to the plurality of output drivers, and the switching control means indicates that the output driver having the same monitoring result is externally connected. The electronic control device according to claim 1, wherein the electronic control device is determined. The monitor means inputs the same signal as when input is made to the input terminal to the plurality of output drivers as an input monitor signal, monitors each output signal from the output driver, and the switching control means 5. The electronic control device according to claim 1, wherein it is determined that output drivers having the same monitoring result are externally connected. Specification storage means for storing, as specification information, processing contents to be executed on the output signal and / or drive current to be applied to the output signal, and the switching control means includes the specification information and the detection result of the monitoring means. The electronic control device according to claim 1, wherein the wiring connection is switched based on The switching means for switching the wiring connection between the plurality of input terminals and the plurality of output drivers includes a plurality of switches respectively corresponding to the plurality of output drivers, and each of the plurality of switches includes the plurality of inputs. 7. The device according to claim 1, comprising a plurality of contacts connected to the terminal on a one-to-one basis, wherein connection / disconnection between the general contact and the corresponding output driver can be switched. Electronic control device.

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