CN113721583A - CAN bus test tool for simulating automobile CAN bus function test - Google Patents
CAN bus test tool for simulating automobile CAN bus function test Download PDFInfo
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- CN113721583A CN113721583A CN202110901747.4A CN202110901747A CN113721583A CN 113721583 A CN113721583 A CN 113721583A CN 202110901747 A CN202110901747 A CN 202110901747A CN 113721583 A CN113721583 A CN 113721583A
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- 238000012360 testing method Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004088 simulation Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 101150008604 CAN1 gene Proteins 0.000 claims description 3
- 101150063504 CAN2 gene Proteins 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0262—Confirmation of fault detection, e.g. extra checks to confirm that a failure has indeed occurred
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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Abstract
The invention provides a CAN bus test tool for simulating the function test of an automobile CAN bus, which comprises a test box and a computer end, wherein the test box comprises a power management module, a key input module, a serial port debugging interface, an MCU and a CAN bus interface, the MCU is respectively connected with the power management module, the key input module, the serial port debugging interface and the CAN bus interface, the key input module simulates the function of the CAN bus by using keys, the CAN bus interface is used for being connected with the CAN bus to be tested, the computer end is provided with the debugging tool, the computer end is connected with the serial port debugging interface through the computer serial port interface, and the test of the CAN bus is realized through the debugging tool. The invention has the beneficial effects that: under the condition that the CAN bus is not installed on the automobile, the CAN bus testing tool CAN simulate the automobile CAN bus to test, and the test is very convenient, so that the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of testing, in particular to a CAN bus testing tool for simulating the function test of an automobile CAN bus.
Background
At present, most of automobile control equipment adopts a CAN bus to transmit data, the quality of the function of a product to be tested CAN be verified only on a real automobile, a large amount of time is wasted by repeated loading verification, and the period of producing the product and researching and developing the product is prolonged.
Disclosure of Invention
In order to solve the problems of difficulty in testing in the production process and product verification in the product development process, the invention provides a CAN bus testing tool, and the product research and development and production efficiency are improved.
The invention provides a CAN bus test tool for simulating the function test of an automobile CAN bus, which comprises a test box and a computer end, wherein the test box comprises a power management module, a key input module, a serial port debugging interface, an MCU and a CAN bus interface, the MCU is respectively connected with the power management module, the key input module, the serial port debugging interface and the CAN bus interface, the key input module simulates the function of the CAN bus by using keys, the CAN bus interface is used for being connected with the CAN bus to be tested, the computer end is provided with the debugging tool, the computer end is connected with the serial port debugging interface through the computer serial port interface, and the test of the CAN bus is realized through the debugging tool.
As a further improvement of the invention, the number of the CAN bus interfaces is two, namely a CAN1 bus interface and a CAN2 bus interface.
As a further improvement of the invention, the test box further comprises an LED lamp indicating module, and the LED lamp indicating module is connected with the MCU.
As a further improvement of the invention, a debugging tool is opened at the computer end, receives data through a serial port, analyzes the data of the interaction between the equipment terminal and the test box, and finds out related logic problems, thereby completing the CAN bus test.
As a further improvement of the invention, the keys of the key input module comprise an ACC shifting switch, a reverse shifting switch and a headlamp shifting switch, and the ACC shifting switch, the reverse shifting switch and the headlamp shifting switch are respectively used for simulating the switch states of an ACC, a reverse and a headlamp of an automobile.
As a further improvement of the present invention, the key input module further comprises a volume up key, a volume down key, a previous song key, a next song key, a bluetooth phone key, and an exit key, and the volume up key, the volume down key, the previous song key, the next song key, the bluetooth phone key, and the exit key respectively simulate the volume up, volume down, previous song, next song, bluetooth phone, and exit functions of a vehicle's side control key.
As a further improvement of the invention, when a tire pressure sensor and a temperature sensor are arranged in the automobile, the test box simulates the temperature change of the automobile tire, and the temperature data is simulated by software and sent to the equipment terminal at regular time, so that the corresponding function can be realized, the automatic detection function is realized, and the test efficiency is improved.
The invention has the beneficial effects that: under the condition that the CAN bus is not installed on the automobile, the CAN bus testing tool CAN simulate the automobile CAN bus to test, and the test is very convenient, so that the working efficiency is improved.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Detailed Description
As shown in fig. 1, the invention discloses a CAN bus testing tool for simulating a CAN bus function test of an automobile, which comprises a testing box and a computer terminal, wherein the testing box comprises a power management module, a key input module, a serial port debugging interface, an MCU and a CAN bus interface, the MCU is respectively connected with the power management module, the key input module, the serial port debugging interface and the CAN bus interface, the CAN bus interface is used for being connected with a CAN bus to be tested, the computer terminal is provided with a debugging tool, the computer terminal is connected with the serial port debugging interface through a computer serial port interface, and the testing of the CAN bus is realized through the debugging tool.
The two CAN bus interfaces are respectively a CAN1 bus interface and a CAN2 bus interface, CAN simultaneously simulate 2 independent CAN buses, CAN test automobile controls with 2 CAN buses, and have different data contents and baud rates of the CAN buses. The test is very convenient, thereby improving the working efficiency.
The test box also comprises an LED lamp indicating module, and the LED lamp indicating module is connected with the MCU.
The data is analyzed through the debugging tool at the computer end, and the data CAN be printed through the serial port when the related CAN bus data needs to be printed in the test process, so that the problems CAN be analyzed and searched more intuitively.
The realization method of the invention is as follows:
step 1: the serial port debugging interface is connected with the computer serial port interface, so that the hardware connection between the test box and the computer end is realized.
Step 2: the print serial protocol is defined as follows:
the serial port displays and receives a data protocol description of the CAN bus: debugging tool of MCU- > PC
(3) CAN extended frame
Receiving CAN bus data (16 system)
| ExtId | IDE | RTR | DLC | DATA |
| 18FFC325 | 1 | 0 | 08 | 00 00 00 00 00 00 00 00 |
The serial port protocol is as follows:
(4) CAN standard frame
Receiving CAN bus data (16 system)
| StdId | IDE | RTR | DLC | DATA |
| 322 | 0 | 0 | 08 | 00 00 00 00 00 00 00 00 |
The serial port protocol is as follows:
(II) serial port display sending CAN bus data protocol description: debugging tool- > MCU of PC
(3) CAN extended frame
CAN bus data of transmission (16 system)
| ExtId | IDE | RTR | DLC | DATA |
| 0CFE6CEE | 1 | 0 | 08 | 00 00 00 00 00 00 00 00 |
The serial port protocol is as follows:
(4) CAN standard frame
CAN bus data of transmission (16 system)
| StdId | IDE | RTR | DLC | DATA |
| 135 | 0 | 0 | 08 | 00 00 00 00 00 00 00 00 |
The serial port protocol is as follows:
and 3, step 3: and (3) opening a debugging tool (software) at the computer end, and carrying out communication protocol matching (setting serial port numbers, baud rates and the like) on the debugging tool at the computer end and a test box (CAN bus test tool).
And 4, step 4: the debugging tool receives data through a serial port, stores the data in an EXCEL table, analyzes data of interaction between the equipment terminal and a test box (CAN bus testing tool), finds out related logic problems, accelerates debugging efficiency and accordingly completes CAN bus testing.
The device terminal can be a central control platform of an automobile, or a 360-machine terminal, or a terminal device such as a t box.
2. And the key of the key input module is used for simulating the CAN bus function to replace loading.
(1) There are 6 toggle switches: the vehicle body related switch states can be simulated: ACC, reverse, headlight, etc.
The implementation method comprises the following steps:
(a) ACC on and off are achieved as follows:
testing the ACC ON function, firstly pulling the ACC pulling switch to an ON position, and testing box simulation data as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFC325 | 1 | 0 | 08 | 00 00 00 04 00 00 00 00 |
the ACC OFF function is tested, firstly, the ACC pulling switch is pulled to the OFF position, and the simulation data of the test box are as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFC325 | 1 | 0 | 08 | 00 00 00 00 00 00 00 00 |
(b) the reversing on and off are realized as follows:
the test gets into the function of backing a car, pulls the toggle switch that backs a car to the ON position at first, and test box analog data is as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFDA21 | 1 | 0 | 08 | 00 00 00 00 40 00 00 00 |
after the tested automobile equipment receives the CAN bus data, corresponding functions are implemented.
The test is gone back to the function of backing a car, at first pulls out the toggle switch of backing a car to the OFF position, and the test box analog data is as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFDA21 | 1 | 0 | 08 | 00 00 00 00 00 00 00 00 |
after the tested automobile equipment receives the CAN bus data, corresponding functions are implemented.
(c) And the on and off of the headlamp are realized as follows:
the test headlight opens the function, pulls out headlight shifting switch at first to the ON position, and the test box analog data is as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFDA21 | 1 | 0 | 08 | 01 00 00 00 40 00 00 00 |
after the tested automobile equipment receives the CAN bus data, corresponding functions are implemented.
The method comprises the following steps of testing the turning-OFF function of a headlamp, firstly, turning OFF a headlamp turning switch to an OFF position, and testing box simulation data as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFDA21 | 1 | 0 | 08 | 00 00 00 00 00 00 00 00 |
after the tested automobile equipment receives the CAN bus data, corresponding functions are implemented.
(2) There are 6 tact buttons: the square control key can be simulated: volume up, volume down, previous song, next song, bluetooth phone, exit, etc.
The method for realizing the simulation of the square control key comprises the following steps:
(a) the volume plus key is implemented as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFC325 | 1 | 0 | 08 | 4100000000000000 volume down |
| 18FFC325 | 1 | 0 | 08 | 000000000000 volume reduction |
After the tested automobile equipment receives the CAN bus data, corresponding functions are implemented.
(b) The volume down key is implemented as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFC325 | 1 | 0 | 08 | 4000004000000000 volume plus press |
| 18FFC325 | 1 | 0 | 08 | 000000000000 volume up and down |
After the tested automobile equipment receives the CAN bus data, corresponding functions are implemented.
(c) The implementation of the previous song key is as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFC325 | 1 | 0 | 08 | 4400000000000000 the last song is pressed |
| 18FFC325 | 1 | 0 | 08 | Opening of the last song 000000000000 |
After the tested automobile equipment receives the CAN bus data, corresponding functions are implemented.
(d) The next song key is implemented as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFC325 | 1 | 0 | 08 | 4000010000000000 Next song pressing |
| 18FFC325 | 1 | 0 | 08 | Release of the next song 000000000000 |
After the tested automobile equipment receives the CAN bus data, corresponding functions are implemented.
(e) Implementation of bluetooth phone keys is as follows:
after the tested automobile equipment receives the CAN bus data, corresponding functions are implemented.
(f) The exit key is implemented as follows:
| ExtId | IDE | RTR | DLC | DATA |
| 18FFC325 | 1 | 0 | 08 | 4000000004000000 Exit Press |
| 18FFC325 | 1 | 0 | 08 | 000000000000 exit release |
After the tested automobile equipment receives the CAN bus data, corresponding functions are implemented.
3. Simulating the functions of the internal part sensor of the vehicle:
when the tire pressure and temperature sensors are arranged in the automobile, the test box simulates the temperature change of the automobile tire, and the temperature data is sent to the equipment terminal at regular time by software simulation, so that the corresponding function can be realized, the automatic detection function is realized, and the test efficiency is improved.
(a) The method for realizing the automatic detection of the simulated tire pressure display information comprises the following steps:
(b) the method for realizing the automatic detection of the temperature information inside and outside the simulated vehicle comprises the following steps:
the foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. The utility model provides a CAN bus test tool of simulation car CAN bus function test which characterized in that: the testing box comprises a power management module, a key input module, a serial port debugging interface, an MCU (micro controller unit) and a CAN (controller area network) bus interface, wherein the MCU is respectively connected with the power management module, the key input module, the serial port debugging interface and the CAN bus interface, the key input module simulates the CAN bus function by keys, the CAN bus interface is used for being connected with a CAN bus to be tested, a debugging tool is installed at the computer end, and the computer end is connected with the serial port debugging interface by the computer serial port interface and realizes the testing of the CAN bus by the debugging tool.
2. The CAN bus test tool of claim 1, wherein: the number of the CAN bus interfaces is two, and the two CAN bus interfaces are respectively a CAN1 bus interface and a CAN2 bus interface.
3. The CAN bus test tool of claim 1, wherein: the test box also comprises an LED lamp indicating module, and the LED lamp indicating module is connected with the MCU.
4. The CAN bus test tool of claim 1, wherein: and opening a debugging tool at the computer end, receiving data by the debugging tool through a serial port, analyzing the data of the interaction between the equipment terminal and the test box, and finding out related logic problems so as to finish the CAN bus test.
5. The CAN bus test tool of claim 1, wherein: in the test process, when CAN bus data needs to be printed, the CAN bus data CAN be printed through a serial port, and the printing serial port protocol is defined as follows:
the serial port displays the received data protocol description of the CAN bus: MCU- > debugging tool
(1) CAN extended frame
Receiving CAN bus data (16 system)
The serial port protocol is as follows:
(2) CAN standard frame
Receiving CAN bus data (16 system)
The serial port protocol is as follows:
6. the CAN bus test tool of claim 5, wherein: the serial display sends CAN bus data protocol description: debugging tool- > MCU
(1) CAN extended frame
CAN bus data of transmission (16 system)
The serial port protocol is as follows:
(2) CAN standard frame
CAN bus data of transmission (16 system)
The serial port protocol is as follows:
7. the CAN bus test tool of claim 1, wherein: the keys of the key input module comprise an ACC shifting switch, a backing shifting switch and a headlamp shifting switch, and the ACC shifting switch, the backing shifting switch and the headlamp shifting switch are used for respectively simulating the switch states of an ACC, a backing and a headlamp of an automobile.
8. The CAN bus test tool of claim 7, wherein: the key input module further comprises a volume increasing key, a volume decreasing key, a previous song key, a next song key, a Bluetooth telephone key and an exiting key, and the volume increasing, the volume decreasing, the previous song key, the next song key, the Bluetooth telephone key and the exiting key respectively simulate the volume increasing, the volume decreasing, the previous song, the next song and the Bluetooth telephone functions of a square control key of an automobile and the exiting function.
9. The CAN bus test tool of claim 1, wherein: when a tire pressure sensor and a temperature sensor are arranged in an automobile, the test box simulates the temperature change of the automobile tire, and the temperature data is sent to the equipment terminal at regular time by software simulation change, so that the corresponding function can be realized, the automatic detection function is realized, and the test efficiency is improved.
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