CN113311774B - Drive control method and system - Google Patents
Drive control method and system Download PDFInfo
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- CN113311774B CN113311774B CN202110642532.5A CN202110642532A CN113311774B CN 113311774 B CN113311774 B CN 113311774B CN 202110642532 A CN202110642532 A CN 202110642532A CN 113311774 B CN113311774 B CN 113311774B
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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
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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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
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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Abstract
The invention discloses a drive control method and a system, wherein the drive control method comprises the steps that a micro control unit transmits data to be transmitted to a drive chip through a microsecond bus, wherein the data to be transmitted comprises self running state information and drive state information of the micro control unit; the driving chip receives the data to be transmitted and stores the data to be transmitted in the register. According to the driving method and device, the microsecond bus is used for transmitting the driving signals, the technical problems that the occupied driving chip pins are too many and the driving chip pins are easily interfered by EMC (electro magnetic compatibility) caused by I/O (input/output) driving control in the prior art are solved, the technical effects of saving the driving chip pins, improving chip integration, saving system space and improving the EMC performance and safety of a driving system are achieved, and the possibility of driving misoperation caused by abnormal driving state is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of drive control, in particular to a drive control method and a drive control system.
Background
In the existing driving mode, the driving control adopts an I/O (input/output) control mode, a plurality of pins are used in the driving mode, the driving state is abnormal when software and hardware of a single chip microcomputer are abnormal, the driving abnormality is unacceptable risk in the function safety of an automobile, and the driving chip is interfered by EMC due to the fact that a plurality of pins are occupied.
Disclosure of Invention
The invention provides a drive control method and a drive control system, which solve the technical problems that in the prior art, the pins of a drive chip are excessively occupied and EMC interference is easily caused due to the use of I/O drive control.
The embodiment of the invention provides a drive control method, which comprises the following steps:
the method comprises the steps that a micro control unit transmits data to be transmitted to a driving chip through a microsecond bus, wherein the data to be transmitted comprises self running state information and driving state information of the micro control unit;
and the driving chip receives the data to be transmitted and stores the data to be transmitted in a register.
Further, before the mcu transmits data to be transmitted to the driver chip via the microsecond bus, the driving control method further includes:
the driving chip runs self-checking after being powered on, and sends a self-checking success signal to the micro control unit when the self-checking result is normal;
and the micro control unit feeds a dog to the driving chip after receiving the self-checking success signal.
Further, before the mcu transmits data to be transmitted to the driver chip via the microsecond bus, the driving control method further includes:
the micro control unit is self-checked after power is on, and enters an enabling state when the self-checking result is normal, wherein the enabling state is a state that the micro control unit has signal output capacity.
Further, the feeding the dog to the driving chip by the micro control unit after receiving the self-test success signal includes:
and the micro control unit feeds the dog to the driving chip at preset intervals after receiving the self-checking success signal.
Further, during the feeding dog to the driving chip by the micro control unit, the driving control method further comprises:
the driving chip acquires self state information in real time and feeds the state information back to the micro control unit;
and the micro control unit judges whether the working state of the driving chip is abnormal or not based on the state information, and stops feeding dogs to the driving chip when the judgment result is yes.
Further, the drive control method further includes:
the micro control unit calculates the frequency and duty ratio of a PWM signal required to be transmitted to the driving chip according to the driving state information;
and the micro control unit transmits the PWM signal with the determined frequency and duty ratio to the driving chip through the microsecond bus.
The embodiment of the invention also provides a drive control system, wherein the drive control system executes the drive control method of any one of the embodiments, and comprises a micro control unit and a drive chip;
and the drive control pin of the micro control unit is electrically connected with the drive pin of one drive chip through a microsecond bus.
The embodiment of the invention also provides an electronic control unit which comprises the drive control system in any one of the embodiments.
The embodiment of the invention also provides driving equipment, which comprises the electronic control unit in any one of the embodiments.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the driving control method according to any of the embodiments.
The invention discloses a drive control method and a drive control system, wherein the drive control method comprises the steps that a micro control unit transmits data to be transmitted to a drive chip through a microsecond bus, wherein the data to be transmitted comprises self running state information and drive state information of the micro control unit; the driving chip receives the data to be transmitted and stores the data to be transmitted in the register. According to the driving method and device, the microsecond bus is used for transmitting the driving signals, the technical problems that the occupied driving chip pins are too many and the driving chip pins are easily interfered by EMC (electro magnetic compatibility) caused by I/O (input/output) driving control in the prior art are solved, the technical effects of saving the driving chip pins, improving chip integration, saving system space and improving the EMC performance and safety of a driving system are achieved, and the possibility of driving misoperation caused by abnormal driving state is reduced.
Drawings
Fig. 1 is a flowchart of a driving control method according to an embodiment of the present invention;
fig. 2 is a system block diagram of the micro control unit driving the driving chip through the microsecond bus according to the embodiment of the present invention;
FIG. 3 is a block diagram illustrating the safe operation of a drive control system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of PWM control and associated control of a drive control system provided by an embodiment of the present invention;
fig. 5 is a structural diagram of a drive control system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the drawings are used for distinguishing different objects, and are not used for limiting a specific order. The following embodiments of the present invention may be implemented individually, or in combination with each other, and the embodiments of the present invention are not limited in this respect.
Fig. 1 is a flowchart of a driving control method according to an embodiment of the present invention. Fig. 2 is a system block diagram of the micro control unit driving the driving chip through the microsecond bus according to the embodiment of the present invention.
As shown in fig. 1 and 2, the driving control method specifically includes the following steps:
step S101, the mcu 10 transmits data to be transmitted to the driver chip 20 through the microsecond bus MSC, where the data to be transmitted includes the running status information and the driving status information of the mcu 10.
In step S102, the driver chip 20 receives the data to be transmitted and stores the data to be transmitted in the register 21.
Specifically, the driving control system is composed of a micro control unit 10, a microsecond bus MSC, and a driving chip 20. Referring to fig. 2, a register 21 is controlled by a driving pin of the driving chip 20, the register 21 is integrated inside the driving chip 20, and when the Micro control unit 10 transmits data to be transmitted to the driving chip 20 through a microsecond bus MSC (Micro secondary channel), the driving chip 20 stores the received data to be transmitted in the register 21 of the driving chip 20; then, the driving chip 20 reads the data in the register 21 and drives the load, for example, the air-conditioning relay is driven to be turned on or the booster pump motor is turned off according to the data in the register 21.
In the embodiment of the present invention, to implement output of 32-bit level, the micro control unit 10 only needs to connect 11 pins when sending a driving signal to the driving chip 20 through the microsecond bus MSC, and needs to connect 32 pins when connecting through the pins, and the microsecond bus MSC can change part of the signal into a serial bus for transmission, thereby greatly saving the use of the pins. A schematic diagram for transferring 16 bits of data is given by way of example in fig. 2.
And in a general case, driving the load includes two methods, low-side driving and high-side driving. Low side drives are typically used for powertrain-related loads, such as motors, heaters, and the like; while high side drives are often used for fuel pumps and body related functions such as seating, lighting, wipers and fans. Referring to fig. 2, vbat represents connection to a power supply, GND represents ground, and when the micro control unit 10 transmits data to be transmitted through the microsecond bus MSC, a high-side drive or a low-side drive may be configured through the microsecond bus MSC, so that various driving requirements in the driving apparatus may be realized only by using a driving control system composed of the micro control unit 10, the microsecond bus MSC, and the driving chip 20.
According to the embodiment of the invention, the microsecond bus is used for transmitting the driving signals, so that the technical problems that the pins of the driving chip are excessively occupied and are easily interfered by EMC (electro magnetic compatibility) caused by using I/O (input/output) driving control in the prior art are solved, the technical effects of saving the pins of the driving chip, improving the integration of the chip, saving the system space, improving the EMC (electro magnetic compatibility) performance and safety of the driving system are achieved, and the possibility of driving misoperation caused by abnormal driving state is reduced.
Fig. 3 is a block diagram of safe operation of the drive control system according to the embodiment of the present invention.
Optionally, before the mcu 10 transmits the data to be transmitted to the driver chip 20 through the microsecond bus MSC in step S101, the driving control method further includes: the driving chip 20 runs self-checking after being powered on, and sends a self-checking success signal to the micro control unit 10 when the self-checking result is normal; the micro control unit 10 feeds the dog to the driving chip 20 after receiving the self-test success signal.
Specifically, as shown in fig. 3, after the driving control system is powered on, the driving chip 20 after being powered on starts to perform self-test, and sends a signal indicating that the self-test is successful to the micro control unit 10 when the self-test is completed and the self-test result is in a normal state, and the micro control unit 10 starts to feed a dog to the driving chip 20 after receiving the signal indicating that the dog feeding is successful, which is sent to the driving chip 20, sent by the driving chip 20.
Optionally, feeding the dog to the driving chip 20 by the micro control unit 10 after receiving the self-test success signal includes: the micro control unit 10 feeds the dog to the driving chip 20 once every preset time interval after receiving the self-test success signal.
Specifically, the frequency of feeding the dog to the driving chip 20 by the mcu 10 may be set according to a requirement, for example, the preset time duration may be set to 10ms, and the mcu 10 feeds the dog to the driving chip 20 every 10 ms.
Optionally, before the mcu 10 transmits the data to be transmitted to the driver chip 20 through the microsecond bus MSC in step S101, the driving control method further includes: the micro control unit 10 performs self-checking after power is on, and enters an enable state when a self-checking result is normal, wherein the enable state is a state in which the micro control unit 10 has a signal output capability.
Specifically, after the power of the driving control system is turned on, in addition to the self-test of the driving chip 20, the micro control unit 10 may also perform the self-test, and enter the enabled state only when the self-test result is that the self-test state is normal. The enable state of the mcu 10 refers to a state in which the mcu 10 has signal output capability. Similarly, the driving chip 20 also enters the enable state after the self-test is successful, and the enable state of the driving chip 20 refers to a state where the driving chip 20 has a signal output capability.
Optionally, during the feeding of the dog to the driving chip 20 by the micro control unit 10, the driving control method further includes: the driving chip 20 acquires the self state information in real time and feeds the state information back to the micro control unit 10; the micro control unit 10 judges whether the working state of the driving chip 20 is abnormal based on the state information, and stops feeding the dog to the driving chip 20 when the judgment result is yes.
Specifically, when the micro control unit 10 feeds the dog device to the driving chip 20, the driving chip 20 can also obtain self-state information in real time, and feed the self-state information back to the micro control unit 10, where the self-state information of the driving chip 20 may include a voltage state, a current state, a temperature state, and the like of the driving chip 20 itself. The mcu 10 may determine whether the operating state of the driver chip 20 is abnormal according to the received status information of the driver chip 20, and if so, stop feeding the dog to the driver chip 20, i.e., stop the driving operation of the driver chip 20.
Obviously, since the micro control unit 10 and the driving chip 20 transmit signals through the microsecond bus MSC, and states of the microsecond bus MSC are distinguished according to bits, fig. 4 is a schematic diagram of PWM control and associated control of the driving control system according to the embodiment of the present invention, referring to fig. 4, 32 transmitted by the microsecond bus MSC is only two states of high and low levels in data, when the driving signals are transmitted through the microsecond bus MSC, a change in the driving state is only changed by a change in the bus state of the microsecond bus MSC, that is, a change in the driving state is realized by a change in the high and low levels of the microsecond bus MSC, and since the change in the high and low levels is not prone to misoperation, the capability of the driving control system is greatly improved, and the safety and reliability of the driving control system are ensured.
It should be noted that, in fact, when both the micro control unit 10 and the driver chip 20 are successfully self-tested, the micro control unit 10 and the driver chip 20 can feed dogs mutually, and not only the micro control unit 10 feeds dogs to the driver chip 20 unilaterally; and the driving chip 20 feeds dogs to the mcu 10, i.e. the driving chip 20 feeds back its own status information to the mcu 10.
Optionally, the drive control method further includes: the micro control unit 10 calculates the frequency and duty ratio of the PWM signal to be transmitted to the driving chip 20 according to the driving state information; the mcu 10 transmits the PWM signal, which determines the frequency and duty cycle, to the driver chip 20 through the microsecond bus MSC.
Illustratively, referring to fig. 4, D0-D30 are all 31-bit data bits transmitted by the mcu 10 to the driver chip 20, plus the command hint CMD, and are all 32-bit data bits. Taking D2 data as an example, when a D2 data bit needs a PWM signal to be transmitted, the micro control unit 10 calculates the frequency and duty ratio of the PWM signal needed by the D2 data bit according to the driving state information, generally, the frequency is controlled to be 1-10KHZ, and the duty ratio is controlled to be 10% -90%; then, the micro control unit 10 connects the PWM control pin for transmitting the D2 data bit signal to the microsecond bus MSC, that is, the corresponding D2 data bit is set to the PWM function in the microsecond bus MSC for transmitting the signal by the micro control unit 10, so as to control the signal output with variable frequency and variable duty ratio.
Referring to fig. 4, in the data bits 32, there are always some data bits that transmit mutually related driving signals, for example, the driving signals of the data bits D7-D12 shown in fig. 4 are related to each other and control needs a complex driving method to participate in real-time control, and at this time, the mcu 10 calculates the PWM signal of each related data bit according to the driving status information, and transmits the calculated PWM signal to the driving chip 20 through the microsecond bus MSC. Therefore, the microsecond bus MSC can not only complete the transmission of one-bit PWM signal, but also mostly PWM signal.
During the transmission period of the PWM signal, the signal output of the microsecond bus MSC does not need the kernel, and is continuously transmitted, that is, the signal is transmitted once every certain time, for example, 1us, on the physical hard line, so that the microsecond bus MSC can ensure that the PWM frequency conversion signal is transmitted to the driver chip 20 in time, and the driver chip 20 can update the driving state every 1 us.
In the embodiment of the invention, the microsecond bus is used for transmitting the driving signals, so that the technical problems that the pins of the driving chip are excessively occupied and are easily interfered by EMC (electro magnetic compatibility) caused by using I/O (input/output) driving control in the prior art are solved, the technical effects of saving the pins of the driving chip, improving the chip integration, saving the system space and improving the EMC performance and safety of the driving system are realized, and the possibility of driving misoperation caused by abnormal driving state is reduced.
An embodiment of the present invention further provides a drive control system, where the drive control system executes the drive control method according to any of the above embodiments, fig. 5 is a structural diagram of the drive control system according to the embodiment of the present invention, and as shown in fig. 5, the drive control system includes a micro control unit 10 and a driver chip 20; the driving control pin 11 of the mcu 10 is electrically connected to a driving pin 22 of a driving chip 20 via the microsecond bus MSC.
Specifically, a plurality of driving control pins 11 of one micro control unit 10 are electrically connected to a plurality of driving pins 22 of one driving chip 20 through a microsecond bus MSC, as shown in fig. 5, a schematic diagram that 11 driving control signals 11 of the micro control unit 10 are connected to 11 driving pins 22 of the driving chip 20 is given, at this time, the driving chip 20 may drive 32 loads (i.e., the load 1-the load 32 shown in fig. 5), that is, may control output of 32 data bits.
The driving control system provided in the embodiment of the present invention executes the driving control method in the above embodiment, so that the driving control system provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, and details are not repeated herein.
The embodiment of the invention also provides an electronic control unit, which is characterized by comprising the drive control system in any one of the embodiments.
The electronic control unit provided in the embodiment of the present invention includes the driving control system in the above embodiment, and thus the electronic control unit provided in the embodiment of the present invention also has the beneficial effects described in the above embodiment, and details are not repeated herein.
The embodiment of the invention also provides driving equipment, which is characterized by comprising the electronic control unit in any one of the embodiments.
The driving device provided by the embodiment of the present invention includes the electronic control unit in the above embodiment, and therefore, the driving device provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, and details are not repeated herein.
Embodiments of the present invention also provide a storage medium containing computer-executable instructions for performing a drive control method when executed by a computer processor.
Specifically, the drive control method includes:
the micro control unit transmits data to be transmitted to the driving chip through a microsecond bus, wherein the data to be transmitted comprises self running state information and driving state information of the micro control unit;
the driving chip receives the data to be transmitted and stores the data to be transmitted in the register.
Of course, the storage medium provided by the embodiment of the present invention contains computer-executable instructions, and the computer-executable instructions are not limited to the method operations described above, and may also execute the relevant operations in the drive control method provided by any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the above search apparatus, each included unit and module are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A drive control method, characterized by comprising:
the method comprises the steps that a micro control unit transmits data to be transmitted to a driving chip through a microsecond bus, wherein the data to be transmitted comprises self running state information and driving state information of the micro control unit;
the driving chip receives the data to be transmitted and stores the data to be transmitted in a register;
before the micro control unit transmits the data to be transmitted to the driving chip through the microsecond bus, the driving control method further comprises the following steps:
the driving chip runs self-checking after being powered on, and sends a self-checking success signal to the micro control unit when the self-checking result is normal;
and the micro control unit feeds a dog to the driving chip after receiving the self-checking success signal.
2. The drive control method according to claim 1, wherein before the micro control unit transmits data to be transmitted to a driver chip through a microsecond bus, the drive control method further comprises:
the micro control unit is self-checked after power is on, and enters an enabling state when the self-checking result is normal, wherein the enabling state is a state that the micro control unit has signal output capacity.
3. The driving control method according to claim 1, wherein the feeding the dog to the driving chip by the micro control unit after receiving the self-test success signal comprises:
and the micro control unit feeds the dog to the driving chip at preset intervals after receiving the self-checking success signal.
4. The drive control method according to claim 1, wherein during the feeding of the dog to the drive chip by the micro control unit, the drive control method further comprises:
the driving chip acquires self state information in real time and feeds the state information back to the micro control unit;
and the micro control unit judges whether the working state of the driving chip is abnormal or not based on the state information, and stops feeding dogs to the driving chip when the judgment result is yes.
5. The drive control method according to claim 1, characterized by further comprising:
the micro control unit calculates the frequency and duty ratio of a PWM signal required to be transmitted to the driving chip according to the driving state information;
and the micro control unit transmits the PWM signal with the determined frequency and duty ratio to the driving chip through the microsecond bus.
6. A drive control system, characterized in that the drive control system executes the drive control method of any one of the preceding claims 1 to 5, the drive control system comprising a micro control unit and a drive chip;
and the drive control pin of the micro control unit is electrically connected with the drive pin of one drive chip through a microsecond bus.
7. An electronic control unit, characterized in that it comprises the drive control system of claim 6.
8. A steering device, characterized in that it comprises an electronic control unit according to claim 7.
9. A computer-readable storage medium on which a computer program is stored, the program realizing the drive control method according to any one of claims 1 to 5 when executed by a processor.
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| CN114721977A (en) * | 2022-03-28 | 2022-07-08 | 一汽解放汽车有限公司 | Drive control method, device and system, electronic equipment and storage medium |
| CN116760914B (en) * | 2023-08-23 | 2023-11-17 | 北京紫光芯能科技有限公司 | Communication method, communication equipment and communication system |
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