CN1747472A - Universal embedded marker and marking method based on CCP - Google Patents

Universal embedded marker and marking method based on CCP Download PDF

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Publication number
CN1747472A
CN1747472A CN 200510061162 CN200510061162A CN1747472A CN 1747472 A CN1747472 A CN 1747472A CN 200510061162 CN200510061162 CN 200510061162 CN 200510061162 A CN200510061162 A CN 200510061162A CN 1747472 A CN1747472 A CN 1747472A
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host computer
ccp
interface
layer
computer
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CN 200510061162
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CN1747472B (en
Inventor
赵民德
潘杭平
吕炜烽
李锡坤
刘雁飞
吴卿
吴朝晖
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

An embedded universal calibration device and method based on CCP protocol is disclosed. Said device is composed of a high-level calibrating tool running on PC for displaying the parameters to be monitored in ECU and sending commands to low-level unit, and a low-level unit running on the ECU to be calibrated for receiving the commands, executing the relative actions, returning the answer, and periodically sending the parameters to be monitored. Said high-level calibrating tool and low-level unit are connected via USB, CAN interface and CAN bus and the CN packets are used to calibrate and monitor the parameters in ECU.

Description

Universal embedded caliberating device and method based on the CCP agreement
Technical field
The present invention relates to the demarcation monitoring field of electronic control unit in the embedded technology (ECU), mainly is a kind of universal embedded caliberating device and method based on the CCP agreement.
Background technology
Electronic control unit (ECU) all needs the process of process matching and calibration from the research and development prototype to forming product mostly, to determine its operational factor and Control Parameter.Therefore, calibration tool is one of key factor of product development success.
At present, be widely used based on the calibration system of SCI serial communication, there is following defective in this method:
1. speed is slow.The requirement of big data quantity and high real-time can't be satisfied, the operation of application program may be influenced;
2. unreliable.Be subjected to external interference easily, cause sending error in data;
3. versatility is poor.A calibration tool can only be used for the demarcation and the monitoring of a controller.
It is a demarcation agreement based on CAN (Control AreaNetwork) bus that CCP (CAN Calibration Protocol) demarcates agreement.It adopts master-slave mode communication.Have only a main equipment in the system, can connect one or more slave units.Main equipment is demarcation, monitoring or a diagnostic device; Slave unit is that engine management system, HCU (Home Control Unit), TCU (Transmission Control Unit) etc. are demarcated ECU, as long as this ECU has the CAN interface, and has the program of lower computer of CCP to get final product.
CCP demarcates the agreement regulation, and the session between main equipment and the slave unit is undertaken by CRO (Command Receive Object) and DTO (Data Transmission Object).All sessions are sent to slave unit by main equipment orders (CRO) and two steps of the corresponding command response of slave unit loopback (DTO) to be finished.The reasonable combination of some sessions can realize multiple function.As: foundation/disconnection main equipment is connected with slave unit, main equipment is uploaded data, the initialization of slave unit parameter space, setting/start/stop DAQ (DataAcquisition) data acquisition of slave unit etc. to slave unit down-transmitting data, slave unit to main equipment.
Summary of the invention
In order to overcome prior art, communication speed is slow, unreliable between calibration tool and the ECU, and the deficiency that the calibration tool versatility is poor, cost is high the invention provides a kind of universal embedded caliberating device and method based on the CCP agreement.This calibrating platform not only can be realized the general utility functions of original scaling method, can also overcome the defective of existing scaling method, and it is the staking-out work platform of one that collection reliability, convenience, versatility and an expandability are provided.
The technical solution adopted for the present invention to solve the technical problems is: this universal embedded caliberating device based on the CCP agreement, mainly comprise host computer calibration tool and slave computer, wherein the host computer calibration tool operates on the PC, be used to the user to show the parameter that the ECU domestic demand monitors, and send order to slave computer according to customer requirements; Slave computer operates on the ECU to be calibrated, is used to accept the order of host computer calibration tool, finishes echo reply after the corresponding actions, and according to the setting of host computer calibration tool, and periodically sending needs the parameter value that monitors; Change the CAN interface by USB between host computer calibration tool and the slave computer, connect by the CAN bus again, wrap by the CAN that sends protocol compliant and realize the parameter in the ECU is demarcated and monitored.
Described host computer calibration tool is divided into four layers: user interface layer, CCP agreement host computer layer, CAN Drive Layer and USB change the CAN hardware layer.
It is the key hardware of host computer calibration tool and target ECU communication that described USB changes the CAN hardware layer.It is responsible for transmitting message that PC sends on the CAN bus and the CAN that sends of receiving target ECU wrap to PC.
Described CAN Drive Layer is changeed the d11 of CAN hardware by calling USB, and some basic API are encapsulated, and provides transmitting-receiving CAN the function of bag to the upper strata.
Described host computer layer is the core of host computer calibration tool.It is made up of Message Processing, command process and three submodules of demarcation interface.Message processing module has encapsulated the CAN of lower floor driving interface, and be responsible for resolving and send CAN and wrap, and the processing of classifying; Command processing module has encapsulated 28 group commands of CCP agreement regulation, is used to provide the combination of various sessions to realize multiple function; Demarcate interface module and encapsulated the required various functions of calibration tool, thereby provide interface to finish user's request to user interface layer.
Described slave computer is made of program of lower computer and Flash driver module two parts of embedding the target slave unit.
Described program of lower computer is made of CCP command processing module, DAQ processing module.The CCP command processing module is accepted the order that the host computer calibration tool sends, and finishes echo reply after the corresponding actions.The DAQ processing module periodically sends the parameter value that needs supervision according to the setting of host computer.The Flash driver module is responsible for the erasable work of flash, after all Control Parameter demarcation finish, the data that obtain is cured among the flash, has finished the last work of demarcating.
This universal embedded scaling method based on the CCP agreement, performing step is as follows: 1), after host computer procedure starts, the newly-built equipment of user, and specify related with it demarcation interface document, and as the .map file .a21 file etc.; 2), the user need to select the parameter of demarcation and supervision, and can specify surveillance style and the display mode that is monitored parameter; 3), call interface in the host computer layer, finish the slave computer initialization, begin to show the value of monitored parameter after the success; 4), certain parameter demarcated selects, demarcate as needs, then call in the host computer layer interface and finish parameter calibration, do not need to disconnect and connect.
The present invention has following advantage with respect to the calibration system based on the SCI serial communication:
1. based on the CAN bus communication, transmission speed is very fast, and the application programs influence does not almost have;
2. read-write ECU memory range is big;
3. can carry out the erasable and online programming of Flash;
4. can demarcate, test and diagnosis a plurality of ECU simultaneously.
Description of drawings
Fig. 1 represents structure connection diagram of the present invention;
Fig. 2 represents host computer calibration tool hierarchy chart of the present invention;
Fig. 3 represents that slave computer of the present invention constitutes schematic diagram;
Fig. 4 represents in the host computer layer of the present invention that the Message Processing submodule receives message flow chart;
Fig. 5 represents in the host computer layer of the present invention, command process submodule flow chart;
Fig. 6 represents in the host computer layer of the present invention, demarcates interface sub-module initialization service procedure figure;
Fig. 7 represents in the host computer layer of the present invention, demarcates interface sub-module and demarcates service procedure figure;
Fig. 8 represents flow chart of the present invention;
Fig. 9 represents CCP command processing module flow chart in the slave computer of the present invention;
Figure 10 represents DAQ processing module flow chart in the slave computer of the present invention.
Embodiment
Introduce the specific embodiment of the present invention in conjunction with the accompanying drawings.
As shown in Figure 1, the platform that the invention process example is adopted is by a PC, and the HC12 processor control system of Motorola is formed jointly, changes the CAN interface card by USB therebetween and connects.The client that has wherein comprised the graphical interfaces of calibrating procedure in the PC has comprised control system and flash and has driven in the slave computer, and the slave computer of CCP agreement.Add a processor if desired, its CAN interface need be linked on the CAN bus.
As shown in Figure 2, host computer calibration tool hierarchy chart of the present invention.The host computer calibration tool changes the CAN hardware layer by user interface layer, CCP agreement host computer layer, CAN Drive Layer and USB and constitutes.The USB of the bottom changes the USB interface that CAN hardware is connected to PC, and the frame of main equipment output is forwarded on the CAN bus; Receive the CAN bag that slave unit sends simultaneously, be transmitted to main equipment.It is a key equipment that passes through the CAN bus communication between master-slave equipment.The CAN Drive Layer has encapsulated the function of transmitting-receiving CAN bag, upwards hides and realizes details, for the upper strata provides the frame function interface that sends and receives information.The host computer layer is realized 28 CCP orders respectively according to CCP agreement 2.1 editions, is encapsulated in the middle of the command process sublayer.Each order all needs to send CRO and receives CRM finishes a session.It comprises the Message Processing sublayer realization that receives message and send message module by calling.On the command process sublayer, be to demarcate the interface sublayer.It has encapsulated the various services that user interface layer need be used, and comprises initialization service, demarcation service, testing service, online programming service and stops the service of demarcating.The reception message module of Message Processing sublayer can be resolved by the automatic DAQ bag that slave computer is sent in addition, needing to obtain the parameter value of supervision, and sends to the buffering area of user interface layer display module.Because the encapsulation of host computer layer, user interface layer is invisible to CCP, thereby has simplified the exploitation of this layer, and makes it have great expandability, develops perfect in shape and function, user interface easy to use.
As shown in Figure 3, slave computer of the present invention constitutes schematic diagram.Slave computer drives two parts by program of lower computer and Flash and forms.Program of lower computer is made of CCP command processing module, DAQ processing module.The CCP command processing module is accepted the order that the host computer calibration tool sends, and finishes echo reply after the corresponding actions.The DAQ processing module periodically sends the parameter value that needs supervision according to the setting of host computer.Flash provides function interface when driving to the program of lower computer Flash erase/write.
As shown in Figure 4, the reception message flow chart of Message Processing sublayer in the host computer layer of the present invention.This is a thread that circulation is executed the task.Read DTO bag on the CAN bus by calling CAN Drive Layer interface, and judge its type, carry out corresponding operating.Enter the next task cycle after finishing.
As shown in Figure 5, command process sublayer flow chart in the host computer layer of the present invention.At first corresponding different order, according to the requirement of CCP agreement, 8 bytes of configuration CRO bag.By Message Processing sublayer interface bag is sent, wait for the response of slave computer.If in 25ms, do not reply, then return time-out error, withdraw from.If reply, then resolve this CRM bag, judge slave computer ruuning situation, return parameters withdraws from.
As shown in Figure 6, in the host computer layer of the present invention, demarcate interface sublayer initialization service procedure figure.This service is finished the connection of target ECU, parameter initialization and DAQ is provided with.At first be connected, obtain the version number of slave computer CCP then with the ECU of assigned address.If inconsistent with host computer, then can't finish staking-out work, disconnect connection and reporting errors, withdraw from the initialization service; If consistent, then continue to carry out.Then by calling ResourceAvailability Mask and the Resource Protection Mask that slave computer is obtained in the CCP order.Resolve Resource Availability Mask and judge whether slave computer is supported to demarcate and DAQ.If do not support, then disconnect connection and reporting errors, withdraw from the initialization service.Then resolve Resource Protection Mask and judge that whether slave computer has protection to demarcation and DAQ, if having, then needs release.By calling corresponding CCP order release, continue if release is successful; Failure then disconnects and connecting and reporting errors, withdraws from the initialization service.Next Control Parameter and the DAQ to slave computer is provided with, and starts the DAQ function of slave computer at last, and temporary transient disconnection the in success back connects, and withdraws from the initialization service.
As shown in Figure 7, in the host computer layer of the present invention, demarcate the interface sublayer and demarcate service procedure figure.At first recover to be connected, send the address that needs calibrating parameters to slave computer afterwards, pass new parameter value then down with target ECU.If then temporary transient disconnection of success connects, withdraw from; Unsuccessful also temporary transient the disconnection connects, and withdraws from after returning mistake.
As shown in Figure 8, user interface layer flow chart of the present invention.This is directly to operate relevant part with the user.Among the present invention, after host computer procedure starts, the newly-built equipment of user, and specify related with it demarcation interface document.Program can be listed parameter then, need to select the parameter of demarcation and supervision for the user, and can specify surveillance style and the display mode that is monitored parameter.Surveillance style has inquiry and uploads automatically, if the latter need specify the cycle of uploading; Display mode has text mode and graphics mode.The user select the beginning, program with regard to connect automatically, initialization operation.Begin to show the value of monitored parameter after the success.Can demarcate this moment to parameter, do not need to disconnect to connect.Can also require to link to each other with other ECU.After staking-out work was finished, the user selected to finish, and quits a program.
As shown in Figure 9, CCP command processing module flow chart in the slave computer of the present invention.This is the task of an Infinite Cyclic.At first wait for the CRO command frame that the host computer calibration tool sends, resolve this order then, carry out corresponding operating, back return response frame CRM finishes.Get back to the first step afterwards, continue to wait for the CRO command frame on the bus.
As shown in figure 10, DAQ processing module flow chart in the slave computer of the present invention.This also is the task of an Infinite Cyclic.At first table (ODT) reads relevant parameter from internal memory value is set, is organized as the DAQ-ODT frame then, it is issued host computer according to DAQ.Enter wait state afterwards, when the next cycle arrives, be waken up, begin to carry out from the first step again.
The present invention is based on the Embedded marking device general and the method for CCP agreement.This platform has greatly improved convenience, reliability and the versatility of staking-out work.Only need corresponding demarcation interface document, and carry out a spot of transplanting work, the ECU that all support the CAN agreements can demarcate with this platform.

Claims (10)

1, a kind of universal embedded caliberating device based on the CCP agreement, it is characterized in that: mainly comprise host computer calibration tool and slave computer, wherein the host computer calibration tool operates on the PC, is used to the user to show the parameter that the ECU domestic demand monitors, and sends order according to customer requirements to slave computer; Slave computer operates on the ECU to be calibrated, is used to accept the order of host computer calibration tool, finishes echo reply after the corresponding actions, and according to the setting of host computer calibration tool, and periodically sending needs the parameter value that monitors; Change the CAN interface by USB between host computer calibration tool and the slave computer, connect by the CAN bus again, wrap by the CAN that sends protocol compliant and realize the parameter in the ECU is demarcated and monitored.
2, the universal embedded caliberating device based on the CCP agreement according to claim 1, it is characterized in that: described host computer calibration tool is divided into four layers: user interface layer, CCP agreement host computer layer, CAN Drive Layer and USB change the CAN hardware layer, wherein USB change the CAN hardware layer be responsible for transmitting message that PC sends on the CAN bus and the CAN that sends of receiving target ECU wrap to PC; The CAN Drive Layer is changeed the d11 of CAN hardware by calling USB, and API is encapsulated, and being used for provides transmitting-receiving CAN the function of bag to the upper strata.
3, the universal embedded caliberating device based on the CCP agreement according to claim 2, it is characterized in that: described host computer layer is made up of message processing module, command processing module and three submodules of demarcation interface module, message processing module has encapsulated the CAN of lower floor driving interface, be responsible for resolving and send CAN and wrap, and the processing of classifying; Command processing module has encapsulated 28 group commands of CCP agreement regulation, is used to provide the combination of various sessions to realize multiple function; Demarcate interface module and encapsulated the required various functions of calibration tool, thereby provide interface to finish user's request to user interface layer.
4, the universal embedded caliberating device based on the CCP agreement according to claim 1, it is characterized in that: described slave computer is made of program of lower computer and Flash driver module two parts of embedding the target slave unit, program of lower computer is made of CCP command processing module, DAQ processing module, the CCP command processing module is accepted the order that the host computer calibration tool sends, and finishes echo reply after the corresponding actions; The DAQ processing module periodically sends the parameter value that needs supervision according to the setting of host computer; The Flash driver module is responsible for the erasable work of flash, after all Control Parameter demarcation finish, the data that obtain is cured among the flash, has finished the last work of demarcating.
5, a kind of universal embedded scaling method based on the CCP agreement, it is characterized in that: performing step is as follows:
1), after host computer procedure starts, the newly-built equipment of user, and specify related with it demarcation interface document;
2), the user need to select the parameter of demarcation and supervision, and can specify surveillance style and the display mode that is monitored parameter;
3), call interface in the host computer layer, finish the slave computer initialization, begin to show the value of monitored parameter after the success;
4), certain parameter demarcated selects, demarcate as needs, then call in the host computer layer interface and finish parameter calibration, do not need to disconnect and connect.
6, the universal embedded scaling method based on the CCP agreement according to claim 5, it is characterized in that: the Message Processing sublayer is a thread that circulation is executed the task in the host computer layer, read DTO bag on the CAN bus by calling CAN Drive Layer interface, and judge its type, carry out corresponding operating.
7, the universal embedded scaling method based on the CCP agreement according to claim 5, it is characterized in that: command process sublayer performing step in the host computer layer, at first corresponding different order, according to CCP protocol configuration message bag, by Message Processing sublayer interface bag is sent, wait for the response of slave computer, if do not reply at the appointed time, then return time-out error, withdraw from; If reply, then resolve this CRM bag, judge slave computer ruuning situation, return parameters withdraws from.
8, the universal embedded scaling method based on the CCP agreement according to claim 5, it is characterized in that: demarcate initialization service performing step in interface sublayer in the host computer layer, at first be connected with the ECU of assigned address, obtain the version number of slave computer CCP then, if it is inconsistent with host computer, then can't finish staking-out work, disconnect connection and reporting errors, withdraw from the initialization service; If consistent, then continue to carry out; Then by calling Resource Availability Mask and the Resource Protection Mask that slave computer is obtained in the CCP order; Resolve Resource Availability Mask and judge whether slave computer is supported to demarcate and DAQ,, then disconnect connection and reporting errors, withdraw from the initialization service if do not support; Then resolve ResourceProtection Mask and judge whether slave computer has protection to demarcation and DAQ, if having, then needs release,, continue if release is successful by calling corresponding CCP order release; Failure then disconnects and connecting and reporting errors, withdraws from the initialization service; Next Control Parameter and the DAQ to slave computer is provided with, and starts the DAQ function of slave computer at last, and temporary transient disconnection the in success back connects, and withdraws from the initialization service.
9, the universal embedded scaling method based on the CCP agreement according to claim 5, it is characterized in that: demarcate the interface sublayer in the host computer layer and demarcate the service performing step, at first recover to be connected with target ECU, send the address that needs calibrating parameters to slave computer afterwards, pass new parameter value then down, if then temporary transient disconnection of success connects, withdraw from: unsuccessful also temporary transient the disconnection connects, and withdraws from after returning mistake.
10, the universal embedded scaling method based on the CCP agreement according to claim 5, it is characterized in that: CCP command processing module performing step in the slave computer, at first wait for the CRO command frame that the host computer calibration tool sends, resolve this order then, carry out corresponding operating, back return response frame CRM finishes; Get back to the first step afterwards, continue to wait for the CRO command frame on the bus; DAQ processing modules implement step at first is provided with table reads relevant parameter from internal memory value according to DAQ in the slave computer, is organized as the DAQ-ODT frame then, and it is issued host computer.Enter wait state afterwards, when the next cycle arrives, be waken up, begin to carry out from the first step again.
CN 200510061162 2005-10-17 2005-10-17 Universal embedded marker and marking method based on CCP Expired - Fee Related CN1747472B (en)

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