CN114760409B - Vehicle camera control method and device - Google Patents
Vehicle camera control method and device Download PDFInfo
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- CN114760409B CN114760409B CN202111406101.5A CN202111406101A CN114760409B CN 114760409 B CN114760409 B CN 114760409B CN 202111406101 A CN202111406101 A CN 202111406101A CN 114760409 B CN114760409 B CN 114760409B
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- deserializer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
- H04N23/661—Transmitting camera control signals through networks, e.g. control via the Internet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
Abstract
The invention discloses a vehicle camera control method and device. The method comprises the following steps: the central control host receives a camera state monitoring instruction and accesses the deserializer chip; accessing a serializer chip in the camera after confirming that the deserializer chip can be accessed; and when the serializer chip cannot be accessed, confirming that the serializer chip is abnormal and controlling the camera to reset and restart so as to enable the serializer chip to recover a normal working state. According to the invention, when the vehicle runs on a bumpy road and the serializer chip of the camera is abnormally connected, so that the video image of the camera is abnormal, the camera is reset and restarted to enable the serializer chip to be recovered to be normal. According to the invention, under the condition that the equipment purchasing cost is not increased, the condition that the video image cannot be normally displayed due to poor contact is reduced, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a vehicle camera control method and device.
Background
At present, a vehicle-mounted reversing camera is arranged at the rear tail part of a vehicle, when the vehicle reverses, a video signal shot by the camera is directly transmitted to a central control host through a connecting wire, and then a reversing image is displayed in a display screen by the central control host; when the vehicle is driven on a bumpy road surface, the connecting head on the connecting line and the connection between the camera and the connector on the central control host are easy to loosen, so that the transmitted video signal is in a state of being disconnected in time, and the camera or the central control host cannot work frequently. In the prior art, the connection tightness is improved by adopting a mode of a connecting wire and a connector with higher quality so as to reduce the probability of poor contact, but the inventor finds that the connector with high quality often has the defects of high price and long purchase period; moreover, high-quality connectors and connectors can only reduce the probability of contact failure, and there are still occasional contact failure cases when driving on bumpy roads.
Disclosure of Invention
The embodiment of the invention provides a vehicle camera control method and device, aiming at the technical problem that in the prior art, when a vehicle runs on a bumpy road section, time break and time break caused by accidental poor contact exist in the transmission process of a video signal shot by a camera.
In order to achieve the above object, the present invention provides a vehicle camera control method, which is applied to a central control host including a deserializer chip, and includes:
receiving a camera state monitoring instruction, and accessing the deserializer chip;
accessing a serializer chip in the camera after confirming that the deserializer chip can be accessed;
and when the serializer chip cannot be accessed, confirming that the serializer chip is abnormal and controlling the camera to reset and restart so as to enable the serializer chip to recover a normal working state.
The invention also provides a vehicle camera control device, which comprises the cameras which are all arranged on the vehicle and a central control host machine which is used for executing the vehicle camera control method, wherein the central control host machine comprises a deserializer chip; the camera includes a serializer chip connected to the deserializer chip.
According to the vehicle camera control method and device provided by the invention, the central control host receives a camera state monitoring instruction and accesses the deserializer chip; accessing a serializer chip in the camera after confirming that the deserializer chip can be accessed; and when the serializer chip cannot be accessed, confirming that the serializer chip is abnormal and controlling the camera to reset and restart so as to enable the serializer chip to recover a normal working state. That is, the present invention determines whether the connection between the camera and the central control host is abnormal by accessing the deserializer chip and the serializer chip respectively, and then when the connection of the serializer chip of the camera is abnormal, the serializer chip is restored to the normal working state by resetting and restarting the whole camera, so that even if the vehicle runs on a bumpy road surface, the video signal shot by the camera cannot be normally transmitted due to the bad contact of the serializer chip, and further the video image cannot be normally displayed, the whole camera can be reset to restore the video image (such as the reverse image of the reverse camera) of the serializer chip and the camera to the normal state. According to the invention, under the condition that the equipment purchasing cost is not increased, the condition that the video image cannot be normally displayed due to poor contact is reduced, and the user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a vehicle camera control method in one embodiment of the present invention;
fig. 2 is a schematic diagram of a vehicle camera control device according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
1. a central control host; 11. a deserializer chip; 111. resetting the pin; 12. an SOC master control chip; 121. an IO pin; 13. a first power supply chip; 2. a camera; 21. a serializer chip; 22. a second power supply chip; 3. a POC cable; 4. IIC bus.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In an embodiment, as shown in fig. 1 and fig. 2, a vehicle camera control method is provided, and is applied to a central control host 1 including a deserializer chip 11, and the vehicle camera control method provided by the present invention is applied to the central control host 1 which communicates with a camera 2 through a network. The central control host 1 and the camera are both mounted on the vehicle, and the central control host 1 may be a whole integrated module or may be composed of a plurality of modules.
The vehicle camera control method includes the following steps S10 to S30:
s10, receiving a camera 2 state monitoring instruction, and accessing the deserializer chip 11; the deserializer chip 11 is used for decoding the coded video signal sent by the camera 2 of the vehicle; further, the central control host 1 further includes an SOC main control Chip 12 (System on Chip), and the SOC main control Chip 12 and the deserializer Chip 11 are connected by an IIC (Inter-Integrated Circuit) bus; in this embodiment, the SOC main control chip 12 accesses the deserializer chip 11 through the IIC bus 4.
In an embodiment, before the step S10, that is, before the receiving of the camera 2 state monitoring instruction, the method includes: and when the central control host 1 is powered on, generating a state monitoring instruction of the camera 2. That is, in this embodiment, each time the central control host 1 starts to power on, the SOC main control chip 12 directly generates a camera 2 state monitoring instruction, so as to enter step S10, and start to access the deserializer chip 11 through the IIC bus 4 according to the camera 2 state monitoring instruction, so as to determine whether the deserializer chip 11 can be accessed (that is, whether the communication connection between the SOC main control chip 12 and the deserializer chip 11 is normal).
S20, after confirming that the deserializer chip 11 can be accessed, accessing a serializer chip 21 in the camera 2; the serializer chip 21 is configured to encode the video signal captured by the camera 2 and send the encoded video signal to the deserializer chip 11; understandably, as shown in fig. 2, the camera 2 includes a serializer chip 21 connected to the deserializer chip 11. Further, the vehicle camera control device further includes a POC (Power over coax) cable 3 for transmitting electric Power and video signals; the POC cable 3 is connected between the deserializer chip 11 and the serializer chip 21, and the serializer chip 21 encodes the video signal shot by the camera 2 and then transmits the encoded video signal to the deserializer chip 11 through the POC cable 3.
Meanwhile, the power supply of the camera 2 is also controlled by the central control host 1 through the POC cable 3. Understandably, if the deserializer chip 11 can be accessed normally, it indicates that the deserializer chip 11 can work normally, and at this time, the process goes to step S20, and the SOC main control chip 12 will continue to access the serializer chip 21 of the camera 2 to determine whether the serializer chip 21 can be accessed normally (i.e. whether the communication connection between the SOC main control chip 12 and the serializer chip 21 is normal). If the deserializer chip 11 cannot be accessed, it indicates that the deserializer chip 11 is abnormal (further, a first connector is disposed at one end of the POC cable 3 connected to the deserializer chip 12, and a first connector plugged with the first connector is disposed on the deserializer chip 12. That is, one end of the POC cable 3 is connected to the first connector through the first connector plugged with each other, and when the connection between the first connector and the first connector is loose, the deserializer chip 12 may be abnormal and cannot be normally accessed), at this time, the SOC main control chip 12 controls the deserializer chip 11 to be reset again, so that the SOC main control chip 11 returns to a normal working state, that is, the deserializer chip 11 after being reset can be normally accessed, and then the SOC main control chip 12 continues to access the serializer chip in the camera in step S20.
And S30, when the serializer chip 21 cannot be accessed, confirming that the serializer chip 21 is abnormal and controlling the camera 2 to reset and restart so as to enable the serializer chip 21 to recover to a normal working state. Since the central control host 1 and the camera 2 are connected by the POC cable 3, in a driving process of a bumpy road section, the connection between the second connector at the end of the POC cable 3 and the second connector on the serializer chip 21 is inevitably loose (further, the second connector is arranged at one end of the POC cable 3 connected to the serializer chip 21, and the second connector inserted into the second connector is arranged on the serializer chip 21. That is, one end of the POC cable 3 is connected with the second connector through the second connector inserted into each other, when the connection between the second connector and the second connector is loose, the serializer chip 21 may be abnormal and cannot be normally accessed), and the repeated loose between the second connector and the second connector may cause that the video image of the camera 2 cannot be normally displayed, at this time, the camera 2 needs to be reset and restarted (the camera 2 is powered up and down again), so that the serializer chip 21 and even the whole camera 2 in the camera 2 work normally again.
In the embodiment of the invention, the central control host 1 respectively accesses the deserializer chip 11 and the serializer chip 21 to judge whether the connection between the camera 2 and the central control host 1 is wrong, and then when the serializer chip 21 of the camera 2 is determined to be abnormally connected, the whole camera 2 is reset and restarted to enable the serializer chip 21 to recover to a normal working state, so that even if a vehicle runs on a bumpy road surface, a video signal shot by the camera 2 cannot be normally transmitted due to poor contact of the serializer chip 21, and further a video image cannot be normally displayed, the whole camera 2 can be reset and restarted to enable the video images of the serializer chip 21 and the camera 2 (such as a reverse image of the reverse camera 2) to recover to be normal. According to the invention, under the condition that the equipment purchasing cost is not increased, the condition that the video image cannot be normally displayed due to poor contact is reduced, and the user experience is improved.
In an embodiment, after the step S10, that is, after the accessing the deserializer chip 11, the method further includes:
after confirming that the deserializer chip 11 cannot be accessed, confirming that the deserializer chip 11 is abnormal and controlling the deserializer chip 11 to reset, so that the deserializer chip 11 is restored to a normal working state, that is, the deserializer chip 11 after being reset can be normally accessed. Understandably, because the central control host 1 and the camera 2 are connected through the POC cable 3, when the vehicle runs on a bumpy road section, the connection between the first connector at the end of the POC cable 3 and the first connector of the deserializer chip 11 of the central control host 1 is loose, the deserializer chip 11 is also abnormal and cannot work normally, at this time, the deserializer chip 11 needs to be reset again, the deserializer chip 11 is enabled to recover a normal working state, and it is ensured that after the first connector and the first connector are connected normally, the video image of the camera 2 can normally display the video image on the vehicle display screen connected with the central control host 1.
Accessing a serializer chip in the camera after confirming that the deserializer chip after resetting can be accessed; understandably, if the deserializer chip 11 after reset can be accessed normally, which indicates that the deserializer chip 11 has recovered to the normal working state after reset, at this time, the SOC main control chip 12 will continue to access the serializer chip 21 of the camera 2 to confirm whether the serializer chip 21 can be accessed normally. Understandably, if the deserializer chip 11 after being reset still cannot be accessed, which indicates that the deserializer chip 11 still has an exception, at this time, the SOC main control chip 12 will continue to control the deserializer chip 11 to be reset again, so that the deserializer chip 11 after being reset can be accessed normally, and so on, until the deserializer chip 11 after being reset again can be accessed normally. In this embodiment, even if the vehicle runs on a bumpy road surface, and the video signal captured by the camera 2 cannot be normally transmitted due to poor contact of the deserializer chip 11, and further the video image cannot be normally displayed, the video image of the camera 2 (for example, the reverse image of the reverse camera 2) can be recovered to be normal by resetting and restarting the deserializer chip 11.
When the serializer chip 21 cannot be accessed, the abnormal condition of the serializer chip 21 is confirmed and the reset and restart of the camera is controlled, so that the serializer chip 21 is recovered to a normal working state. That is, when the serializer chip 21 cannot be accessed, it is indicated that the serializer chip 21 is abnormal and cannot operate, and at this time, the camera 2 needs to be reset and restarted again (the camera 2 is powered up and down again), so that the serializer chip 21 in the camera 2 and even the entire camera 2 operate again. In this embodiment, even if the vehicle runs on a bumpy road surface, and the video signal captured by the camera 2 cannot be normally transmitted due to poor contact between the deserializer chip 11 and the serializer chip 21, and further the video image cannot be normally displayed, the video image of the camera 2 (for example, the reverse image of the reverse camera 2) can be normally recovered by resetting and restarting the deserializer chip 11 and integrally restarting the reset and restart the camera. According to the invention, under the condition that the equipment purchasing cost is not increased, the condition that the video images cannot be normally displayed due to poor contact is further reduced, and the user experience is improved.
Specifically, an IO pin 121 is disposed on the SOC main control chip 12; the deserializer chip 11 is provided with a reset pin 111 connected with the IO pin 121; the SOC main control chip 12 is further configured to confirm that the deserializer chip 11 is abnormal after confirming that the deserializer chip 11 cannot be accessed, and control the deserializer chip 11 to reset through the IO pin 121 and the reset pin 111, so that the deserializer chip 11 recovers to a normal working state. The connection mode has simple and reliable structure and can smoothly complete the reset process.
Further, the central control host 1 further includes an SOC main control chip 12 and a first power supply chip 13; the camera 2 further comprises a second power chip 22 which is connected with the first power chip 13 and provides power for the camera 2 (the second power chip 22 directly controls the power supply for the camera 2); the first power supply chip 13 is connected between the SOC main control chip 12 and the second power supply chip 22; the SOC main control chip 12 is connected with the serializer chip 21 through the deserializer chip 11; that is, the SOC main control chip 12 in the central control host 1 can control the second power supply chip 22 to supply electric energy or interrupt power supply by enabling the first power supply chip 13; understandably, when the serializer chip 21 cannot be accessed, the SOC main control chip 12 confirms that the serializer chip 21 is abnormal, and controls the second power supply chip 22 and the serializer chip 21 to reset and restart by enabling the first power supply chip 13, so that the serializer chip 21 recovers to a normal working state.
Further, the vehicle camera control device further comprises a POC cable 3 for transmitting power and video signals; one end of the POC cable 3 is connected to the first power chip 13 and the deserializer chip 11, and the other end of the POC cable 3 is connected to the serializer chip 21 and the second power chip 22. That is, in the present embodiment, the power supply of the camera 2 and the video signal of the camera 2 share one POC cable 3, and the POC cable 3 simultaneously implements the functions of transmitting power and video signal.
In an embodiment, after the step S20, that is, after the step of accessing the serializer chip 21 in the camera 2, the method further includes:
when the serializer chip 21 can be accessed, confirming that the serializer chip 21 is in a normal working state and carrying out initialization operation on the serializer chip 21; if the SOC main control chip 12 can normally access the serializer chip 21 for communication, which indicates that the serializer chip 21 of the camera 2 works normally, at this time, the SOC main control chip 12 starts to initialize the serializer chip 21 of the camera 2.
Acquiring a video signal of the camera 2 and determining whether the video signal is locked; that is, in this step, after the SOC main control chip 12 initializes the serializer chip 21 of the camera 2, the video signal of the camera 2 is obtained, and a judgment is made according to the obtained video signal to determine whether the video signal is locked.
And when the video signal is locked, confirming that the video image of the camera 2 is normal and carrying out initialization operation on the deserializer chip. That is, if the video signal of the camera 2 is locked, it indicates that the video signal of the camera 2 is normal, at this time, the SOC main control chip 12 will initialize the deserializer chip 11 of the central control host 1, and after the deserializer chip 11 is initialized, it represents that the SOC main control chip 12 has completed the preliminary preparation work of video image display (for example, a reverse video is displayed on a display screen connected to the central control host 1 on the vehicle), and at this time, the SOC main control chip 12 may monitor in real time and wait for receiving the image display signal (for example, when the camera 2 is the vehicle reverse camera 2, the image display signal is the reverse trigger signal).
Further, in an embodiment, after confirming that the video image of the camera 2 is normal and performing an initialization operation on the deserializer chip when the video signal is locked, the method further includes:
after receiving the image display signal, decoding the video signal coded and sent by the serializer chip through the deserializer chip, and displaying the video image on a preset display interface of the vehicle according to the decoded video signal. That is, after the SOC main control chip 12 confirms that the video image of the camera 2 is normal and initializes the deserializer chip, when the image display signal is detected in real time, the deserializer chip 11 decodes the video signal coded and sent by the serializer chip 21 and sends the decoded video signal to the SOC main control chip 12, and the SOC main control chip 12 plays the video image shot by the camera 2 (i.e. the reverse image corresponding to the video signal shot by the reverse camera 2 to assist in completing the normal reverse operation) on a preset display interface (set according to the requirement, for example, the display interface of the display screen in communication connection with the central control host on the vehicle).
In an embodiment, after acquiring the video signal of the camera and determining whether the video signal is locked, the method further includes:
detecting whether the hot plug state of the serializer chip is changed or not according to a preset time interval when the video signal is not locked; in this embodiment, after determining that the video signal is not locked, it is described that the video signal of the camera 2 is abnormal, and at this time, polling detection processing for a hot plug state needs to be performed on the camera 2. That is, polling detection processing of the hot plug state is performed on the serializer chip 21 of the camera 2 at a timing (a preset time interval is set according to requirements, including but not limited to 1-3 seconds) to determine whether the hot plug state of the serializer chip is changed. Understandably, a polling time point is set at every preset time interval (the first polling time point may be set as a time point at which it is determined that the video signal is not locked).
When the hot plugging state of the serializer chip is changed, a camera state monitoring instruction is generated; understandably, when the hot plug state of the serializer chip is changed, the SOC main control chip 12 generates a camera 2 state monitoring instruction to re-enter step S10, starts to access the deserializer chip 11 through the IIC bus 4 according to the camera 2 state monitoring instruction, and further determines whether the deserializer chip 11 can be accessed, that is, in this embodiment, after determining that the hot plug state of the serializer chip is changed, the execution step S10 and the subsequent steps are returned to.
And when the hot plug state of the serializer chip is not changed, continuously detecting whether the hot plug state of the serializer chip is changed. That is, whether the hot plug state of the serializer chip is changed or not is continuously detected at the next polling time point; wherein the next polling time point is separated from the first polling time point by a preset time interval. That is, when the hot plug state of the serializer chip is not changed, if the current time point is consistent with the next polling time point, the SOC main control chip 12 will continue to detect whether the hot plug state of the serializer chip is changed at the next polling time point, that is, at each subsequent polling time point, if it is detected that the hot plug state of the serializer chip is not changed, then continuously start the hot plug state polling detection process on the camera 2 (the hot plug state polling detection process specifically means that, when the hot plug state of the serializer chip is not changed, it continues to detect whether the hot plug state of the serializer chip is changed at the next polling time point), that is, after determining that the hot plug state of the serializer chip is not changed, the hot plug state polling detection process is executed in a loop until it is detected that the hot plug state of the serializer chip is changed, and then generate a camera state monitoring instruction and enter step S10.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In one embodiment, as shown in fig. 2, a vehicle camera control device is provided, which includes a camera 2 and a central control host 1, wherein the camera 2 is mounted on a vehicle, and the central control host 1 is used for executing the vehicle camera control method, and the central control host 1 includes a deserializer chip 11; the camera 2 includes a serializer chip 21 connected to the deserializer chip 11. Further, the vehicle camera control device further comprises a POC cable 3 for transmitting power and video signals; the POC cable 3 is connected between the deserializer chip 11 and the serializer chip 21, and the serializer chip 21 encodes the video signal shot by the camera 2 and then transmits the encoded video signal to the deserializer chip 11 through the POC cable 3. Meanwhile, the power supply of the camera 2 is also controlled by the central control host 1 through the POC cable 3. In the embodiment of the present invention, the central control host 1 respectively accesses the deserializer chip 11 and the serializer chip 21 to determine whether the connection between the camera 2 and the central control host 1 is abnormal, and then when it is determined that the connection of the serializer chip 21 of the camera 2 is abnormal, the whole camera 2 is reset and restarted to recover the serializer chip 21 to the normal working state. Therefore, even if the vehicle runs on a bumpy road surface, the video signal shot by the camera 2 cannot be normally transmitted due to poor contact of the serializer chip 21, and further the video image cannot be normally displayed, the whole camera 2 can be reset and restarted to enable the serializer chip 21 and the video image (such as the reversing image of the reversing camera 2) of the camera 2 to be normal. According to the invention, under the condition that the equipment purchasing cost is not increased, the condition that the video image cannot be normally displayed due to poor contact is reduced, and the user experience is improved.
For specific limitations of each chip in the vehicle camera control device, reference may be made to the above limitations on the vehicle camera control method, which is not described herein again.
In an embodiment, the central control host 1 further includes an SOC main control chip 12 and a first power supply chip 13; the camera 2 further comprises a second power chip 22 which is connected with the first power chip 13 and provides power for the camera 2 (the second power chip 22 directly controls the power supply for the camera 2); the first power supply chip 13 is connected between the SOC main control chip 12 and the second power supply chip 22; the SOC main control chip 12 is connected with the serializer chip 21 through the deserializer chip 11; that is, the SOC main control chip 12 in the central control host 1 can control the second power supply chip 22 to supply power or interrupt power supply by enabling the first power supply chip 13.
The SOC main control chip 12 is used for receiving a state monitoring instruction of the camera 2 and accessing the deserializer chip 11; after confirming that the deserializer chip 11 can be accessed, accessing a serializer chip 21 in the camera 2; when the serializer chip 21 cannot be accessed, the abnormality of the serializer chip 21 is confirmed, and the first power supply chip 13 is enabled to control the second power supply chip 22 and the serializer chip 21 to reset and restart, so that the serializer chip 21 recovers to a normal working state. Specifically, since the central control host 1 and the camera 2 are connected by the POC cable 3, during driving in a bumpy road segment, the connection between the second connector at the end of the POC cable 3 and the second connector on the serializer chip 21 is inevitably loose, and the repeated loose between the second connector and the second connector may cause that the video image of the camera 2 cannot be displayed normally, and at this time, in order to perform hot-plug protection on the camera 2, the reset and restart of the camera 2 (by enabling the first power chip 13 to control the second power chip 22 and the serializer chip 21 to be reset and restarted) is required to be performed again, so that the serializer chip 21 in the camera 2 and even the whole camera 2 operate normally again.
In an embodiment, the vehicle camera control device further comprises a POC cable 3 for transmitting power and video signals; one end of the POC cable 3 is connected to the first power chip 13 and the deserializer chip 11, and the other end of the POC cable 3 is connected to the serializer chip 21 and the second power chip 22. That is, the SOC main control chip 12 in the central control host 1 can control the second power supply chip 22 to supply power or interrupt power supply by enabling the first power supply chip 13; understandably, when the serializer chip 21 cannot be accessed, the SOC main control chip 12 confirms that the serializer chip 21 is abnormal, and controls the second power supply chip 22 and the serializer chip 21 to reset and restart by enabling the first power supply chip 13, so that the serializer chip 21 recovers to a normal working state.
In an embodiment, the vehicle camera control device further includes an IIC bus 4 connected between the SOC main control chip 12 and the deserializer chip 11; the SOC master control chip 12 accesses the deserializer chip 11 through the IIC bus 4. That is, in this embodiment, the SOC main control chip 12 accesses the deserializer chip 11 through the IIC bus 4. However, the present invention is not limited to this access method.
In an embodiment, the SOC main control chip 12 is provided with an IO pin 121; the deserializer chip 11 is provided with a reset pin 111 connected with the IO pin 121; the SOC main control chip 12 is further configured to confirm that the deserializer chip 11 is abnormal after confirming that the deserializer chip 11 cannot be accessed, and control the deserializer chip 11 to reset through the IO pin 121 and the reset pin 111, so that the deserializer chip 11 recovers to a normal working state. That is, since the central control host 1 and the camera 2 are connected through the POC cable 3, when the vehicle travels on a bumpy road section, the connection between the first connector at the end of the POC cable 3 and the first connector of the deserializer chip 11 of the central control host 1 becomes loose, and the deserializer chip 11 may also be abnormal and may not work normally, at this time, the deserializer chip 11 needs to be reset again (the deserializer chip 11 is controlled to reset through the IO pin 121 and the reset pin 111), so that the deserializer chip 11 is restored to a normal working state, and it is ensured that after the connection between the first connector and the first connector is normal, the video image of the camera 2 can normally display the video image on the vehicle display screen connected to the central control host 1. Therefore, even if the vehicle runs on a bumpy road surface, the video signal shot by the camera 2 cannot be normally transmitted due to poor contact of the deserializer chip 11, and further when the video image cannot be normally displayed, the video image of the camera 2 (such as the reversing image of the reversing camera 2) can be recovered to be normal by resetting and restarting the deserializer chip 11. According to the invention, under the condition that the equipment purchasing cost is not increased, the condition that the video images cannot be normally displayed due to poor contact is further reduced, and the user experience is improved.
It will be understood by those of ordinary skill in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware associated with computer readable instructions, which can be stored in a non-volatile computer readable storage medium, and when executed, can include processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), rambus Direct RAM (RDRAM), direct Rambus Dynamic RAM (DRDRAM), and Rambus Dynamic RAM (RDRAM), among others.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of each functional unit or module is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units or modules according to requirements, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. The vehicle camera control method is applied to a central control host comprising a deserializer chip, and comprises the following steps:
receiving a camera state monitoring instruction, and accessing the deserializer chip;
accessing a serializer chip in the camera after confirming that the deserializer chip can be accessed;
when the serializer chip cannot be accessed, confirming that the serializer chip has poor contact abnormity and controlling the camera to reset and restart so as to enable the serializer chip to recover to a normal working state;
after accessing the serializer chip in the camera, the method further comprises: when the serializer chip can be accessed, confirming that the serializer chip is in a normal working state and carrying out initialization operation on the serializer chip; acquiring a video signal of the camera and determining whether the video signal is locked;
after the obtaining the video signal of the camera and determining whether the video signal is locked, the method further comprises: when the video signal is not locked, detecting whether the hot plug state of the serializer chip is changed or not according to a preset time interval; and when the hot plug state of the serializer chip is changed, generating a camera state monitoring instruction.
2. The vehicle camera control method of claim 1, wherein after accessing the deserializer chip, further comprising:
after confirming that the deserializer chip cannot be accessed, confirming that the deserializer chip is abnormal and controlling the deserializer chip to reset;
accessing a serializer chip in the camera after confirming that the deserializer chip after resetting can be accessed;
and when the serializer chip cannot be accessed, confirming that the serializer chip is abnormal and controlling the camera to reset and restart so as to enable the serializer chip to recover a normal working state.
3. The vehicle camera control method of claim 1, wherein after accessing the serializer chip in the camera, further comprising:
and when the video signal is locked, confirming that the video image of the camera is normal and carrying out initialization operation on the deserializer chip.
4. The vehicle camera control method of claim 1, wherein after the obtaining the video signal of the camera and determining whether the video signal is locked, further comprising:
and when the hot plug state of the serializer chip is not changed, continuously detecting whether the hot plug state of the serializer chip is changed.
5. The vehicle camera control method according to any one of claims 1 to 4, wherein before receiving the camera state monitoring instruction, the method includes:
and generating a camera state monitoring instruction when the central control host is powered on.
6. A vehicle camera control device, characterized by comprising a camera and a central control host computer, wherein the camera is mounted on a vehicle, and the central control host computer is used for executing the vehicle camera control method according to any one of claims 1 to 5 and comprises a deserializer chip; the camera comprises a serializer chip connected with the deserializer chip;
the central control host also comprises an SOC main control chip and a first power supply chip; the camera also comprises a second power supply chip which is connected with the first power supply chip and provides power for the camera; the first power supply chip is connected between the SOC main control chip and the second power supply chip; the SOC main control chip is connected with the serializer chip through the deserializer chip;
the SOC main control chip is used for receiving a camera state monitoring instruction and accessing the deserializer chip; accessing a serializer chip in the camera after confirming that the deserializer chip can be accessed; when the serializer chip cannot be accessed, confirming that the serializer chip has poor contact abnormity, and enabling the first power supply chip to control the second power supply chip and the serializer chip to reset and restart so as to enable the serializer chip to recover a normal working state;
the SOC master control chip is also used for confirming that the serializer chip is in a normal working state and carrying out initialization operation on the serializer chip when the serializer chip can be accessed; the SOC main control chip is also used for acquiring a video signal of the camera and determining whether the video signal is locked; when the video signal is not locked, detecting whether the hot plug state of the serializer chip is changed or not according to a preset time interval; and when the hot plug state of the serializer chip is changed, generating a camera state monitoring instruction.
7. The vehicle camera control apparatus of claim 6, further comprising a POC cable for transmitting power and video signals; one end of the POC cable is connected with the first power supply chip and the deserializer chip, and the other end of the POC cable is connected with the serializer chip and the second power supply chip.
8. The vehicle camera control device of claim 6, further comprising an IIC bus connected between the SOC main control chip and the deserializer chip; and the SOC main control chip accesses the deserializer chip through the IIC bus.
9. The vehicle camera control device according to claim 6, wherein an IO pin is provided on the SOC main control chip; a reset pin connected with the IO pin is arranged on the deserializer chip;
the SOC main control chip is further used for confirming that the deserializer chip is abnormal after confirming that the deserializer chip cannot be accessed, and controlling the deserializer chip to reset through the IO pin and the reset pin.
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