CN109874010B - Automatic detection method and system for camera module - Google Patents
Automatic detection method and system for camera module Download PDFInfo
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- CN109874010B CN109874010B CN201910143013.7A CN201910143013A CN109874010B CN 109874010 B CN109874010 B CN 109874010B CN 201910143013 A CN201910143013 A CN 201910143013A CN 109874010 B CN109874010 B CN 109874010B
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Abstract
The application discloses automatic detection method and system of camera module, and the configuration parameters of all camera module models supported by the camera module are preset in a chip software driver, and the method comprises the following steps: sending an operation request to a camera module to be configured, and judging whether a response exists; if the camera module to be configured responds to the operation request, acquiring an ID register value of the camera module to be configured; comparing the ID register value with any camera module ID value supported by the chip; and if the ID register value is consistent with the ID value of the camera module supported by the chip, calling the camera module configuration parameters of the ID register value supported by the chip, and performing configuration adjustment on the camera module to be configured. This application, the model of the camera module that can automatic identification access camera input system supports more camera modules, calls predetermined configuration parameter simultaneously and disposes, reduces the error rate, improves work production efficiency.
Description
Technical Field
The application relates to the technical field of camera control, in particular to a camera module automatic detection method and system.
Background
The camera is also called a computer camera, a computer eye, an electronic eye and the like, is a video input device, and is widely applied to aspects such as video conferences, telemedicine, real-time monitoring and the like. In order to enlarge the imaging range of images and improve the user experience, the double-camera technology is widely applied to the fields of mobile phones, automobile data recorders, monitoring and the like.
At present, in the development of software and hardware of double cameras, the situation that the model number of a camera module is known is met, but in the development of software and hardware of a chip design manufacturer, the model numbers of the camera module are required to be supported as many as possible, and the selectivity of a chip to the model number of the camera module is required to be increased. Therefore, different developers may use different camera modules to develop, the developers need to distinguish the models of the used camera modules and configure parameters according to the models of the camera modules.
However, in the development of cameras, particularly in a dual-camera, three-camera or more camera input system, the camera module types connected to the video input interface are random, and the developer himself or herself recognizes that the camera module types are likely to make mistakes, and is inefficient, and in addition, mistakes are likely to be made by the way in which the developer inputs the configuration parameters of the camera module types.
Disclosure of Invention
The application provides an automatic detection method and system of a camera module, and aims to solve the technical problems that in the prior art, when a camera is developed, errors are easily caused in identifying the model of the camera module, the efficiency is low, and errors are easily caused in a mode of inputting configuration parameters of the model of the camera module.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
in a first aspect, an embodiment of the present application discloses an automatic detection method for a camera module, where configuration parameters of all camera module types supported by a chip are preset in a chip software driver, and the method includes:
sending an operation request to a camera module to be configured, and judging whether a response exists;
if the camera module to be configured responds to the operation request, acquiring an ID register value of the camera module to be configured;
comparing the ID register value with any camera module ID value supported by the chip;
and if the ID register value is consistent with the ID value of the camera module supported by the chip, calling the camera module configuration parameters of the ID register value supported by the chip, and performing configuration adjustment on the camera module to be configured.
Optionally, in the automatic detection method of the camera module, the method further includes:
if the operation request is not responded, or the ID register value is inconsistent with the ID value of the camera module supported by the chip, adding the configuration parameters of the camera module to be configured into the chip software drive;
and detecting the camera module to be configured again.
Optionally, in the automatic detection method for a camera module, the sending an operation request to the camera module to be configured includes: the operation request is sent over the I2C bus.
Optionally, in the automatic detection method of the camera module, the method further includes:
when addresses of two or more slave devices of the camera modules to be configured are different, the number of the I2C buses is 1;
when the addresses of two or more slave devices to be configured with the camera modules are the same, the number of the I2C buses is equal to the number of the camera modules accessed into the camera input system.
Optionally, in the automatic detection method for a camera module, a reset port is bound to the video access port, and when two or more camera modules with different slave device addresses are connected to the camera input system, after the configuration adjustment is performed on the camera module to be configured, the method further includes:
setting a reset port of any detected type of camera module to be configured as an effective level, and setting the rest reset ports as invalid levels;
reading an ID register value according to the address of the camera module to be configured with the detected model;
if the error is reported or the ID register value is not matched with the ID value of the detected type of the camera module to be configured, connecting the detected type of the camera module to be configured to the video access port bound with the reset port set as the effective level;
if the detected type of the camera module to be configured is successfully matched with the video access port, the types of the remaining camera modules to be configured and the bound video access port position are judged until the detection of all the camera modules to be configured, which are accessed into the camera input system, is completed.
Optionally, in the automatic detection method of the camera module, the method further includes: and providing a reference clock for the camera module to be configured, wherein the reference clock is a working clock of the camera module to be configured or a reference clock of a phase-locked loop.
In a second aspect, an embodiment of the present application discloses an automatic detection system for a camera module, the system includes: main processor and a plurality of camera module, wherein:
the camera modules are connected to the main processor;
the main processor comprises a parameter configuration unit, and configuration parameters of camera module types supported by all the main processor are configured in the parameter configuration unit.
Optionally, in the automatic detection system for the camera module, the main processor includes an image processing unit, an I2C controller, and a plurality of video access ports, the camera modules are respectively and correspondingly connected to the video access ports, and the video access ports are all connected to the image processing unit;
the I2C controller is connected to the camera module through an I2C bus.
Optionally, in the automatic detection system for a camera module, the system further includes: the video access ports are all bound with the reset ports, and the reference clock is used for a working clock or a phase-locked loop of the camera module.
Optionally, in the automatic detection system for camera modules, the number of the I2C buses is 1, or the number of the I2C buses is the same as the number of several camera modules.
Compared with the prior art, the beneficial effect of this application is:
the application provides an automatic detection method and system of a camera module, configuration parameters of all camera module models supported by a chip are preset in a chip software driver, and the method comprises the following steps: and sending an operation request to the camera module to be configured, judging whether a response exists, and continuously acquiring the ID register value of the camera module to be configured when the camera module to be configured responds to the operation request. And matching the obtained ID register value with any camera module ID value supported by the chip preset in the chip software drive, if the ID register value is consistent with the camera module ID value supported by the chip, identifying the model of the camera module to be configured, and calling configuration parameters for configuration adjustment, wherein the configuration parameters are the configuration parameters consistent with the identified model of the camera module in the chip software drive. According to the automatic detection method for the camera module, the configuration parameters of the camera module models of a plurality of types are stored in the chip software driver, the models of the camera module connected into the camera input system can be automatically identified, more camera modules are supported, the preset configuration parameters are called to be configured, the error rate is reduced, and the work production efficiency is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of an automatic detection method for a camera module according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a basic structure of an automatic detection system of a camera module according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a basic structure of another automatic detection system for a camera module according to an embodiment of the present invention;
description of reference numerals: 1. a main processor; 2. a first camera module; 3. a second camera module; 4. a first video access port; 5. a second video access port; 6. an image processing unit; 7. an I2C controller; 8. an I2C bus; 9. a first reset line; 10. a second reset line; 11. reference clock line.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. 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 application.
Referring to fig. 1, a schematic flow chart of an automatic detection method for a camera module according to an embodiment of the present invention is shown. In this application, preset in chip software driver the configuration parameter of all camera module models that the chip supported, the configuration parameter includes: initialization sequence, different resolution parameters, gain parameters, exposure parameters, a plurality of I2C slave device address arrays supported by the camera module, an ID value of the camera module and the like. The main processor automatically detects the I2C slave equipment address of each camera module and the ID value of the camera module, and circularly matches all the ID values of the camera modules with the ID register value of the camera module accessed into the camera input system. Specifically, the method comprises the following steps:
step S01: sending an operation request to a camera module to be configured, and judging whether a response exists;
in this application, the main processor sends a read-write operation request through an I2C bus, and specifically, when the main processor reads and writes a register of a camera module accessing a camera input system through an I2C bus, according to the I2C protocol, it is first necessary to write a slave address to the camera module, and in the next clock cycle after the slave address is written, the camera module sends a response signal, and then the chip detects whether the slave address sent on the I2C bus is consistent with a slave address in any camera module model supported by the chip. If the read-write operation requests are consistent, the camera module accessed to the camera input system responds to the read-write operation requests; and if the read-write operation request is inconsistent with the read-write operation request, the camera module accessed to the camera input system does not respond to the read-write operation request.
In addition, when the addresses of two or more slave devices to be configured with the camera modules, which are accessed to the camera input system, are different, the number of the I2C buses is 1, so that the requirement on the number of the I2C buses can be reduced, the number of chip pins required by an image system is saved, and the method can adapt to more types of main processors. When the addresses of two or more slave devices to be configured with the camera modules accessed into the camera input system are the same, the number of the I2C buses is equal to the number of the camera modules accessed into the camera input system. The above is selected according to specific use conditions.
In the method for automatically detecting a camera module according to the embodiment of the present invention, before step S01, the number of camera modules to be accessed to the camera input system and the number of camera modules actually supported by the camera input system need to be compared, and if the number of camera modules accessed to the camera input system is smaller than or equal to the number of camera modules actually supported by the camera input system, step S01 is continued.
Step S02: if the camera module to be configured responds to the operation request, the main processor acquires an ID register value of the camera module to be configured;
step S03: comparing the ID register value with any camera module ID value supported by the chip;
step S04: and if the ID register value is consistent with the ID value of the camera module supported by the chip, calling the camera module configuration parameters of the ID register value supported by the chip, and performing configuration adjustment on the camera module to be configured.
In consideration of the above, when the slave device addresses of two or more camera modules accessing the camera input system are different, the number of the I2C buses is 1, the main processor is connected to and controls the two or more camera modules through one I2C bus, and since the camera modules and the video access ports are randomly matched, the corresponding relationship between the camera modules and the video access ports needs to be identified. This application comes automatic matching camera module and video input interface's relation of connection through the port that resets, and when the port that resets was effective level, the camera module that corresponds with it was in the reset state, and the host processor reads the operation of this camera module's ID register through I2C bus and will fail.
The method comprises the following steps that a reset port is bound to a video access port in the main processor, and when two or more to-be-configured camera modules with different slave device addresses are accessed into the camera input system, after the model of the to-be-configured camera module accessed into the camera input system is identified, the method further comprises the following steps: the main processor sets a reset port of any detected type of camera module to be configured as an effective level, the rest reset ports are all set as invalid levels, the main processor reads an ID register value according to the slave equipment address of the detected type of camera module to be configured, and if an error is reported or the ID register value is not matched with the ID value of the camera module any more, the detected type of camera module to be configured is connected to a video access port bound with the reset port set as the effective level. If the detected type of the camera module to be configured is successfully matched with the video access port, the types of the remaining camera modules to be configured and the bound video access port position are judged until the detection of all the camera modules to be configured, which are accessed into the camera input system, is completed.
Further, the video access port is a parallel interface or a serial interface. In addition, the main processor provides a reference clock for a camera module accessed to the camera input system, and the reference clock is a working clock of the camera module or a reference clock of a phase-locked loop. The main processor provides an input clock for a phase-locked loop in the chip, and the phase-locked loop generates an output clock and a clock required in the image sensor. Although the reference clock is synchronous, the enabling of the image sensor has a sequential order, so that the moments of the data output by the two or more camera modules have sequential differences, and the application allows two or more paths of video data with sequential differences to be received.
The automatic detection method of the camera module provided by the embodiment of the invention further comprises the following steps: and if the operation request is not responded, or the ID register value is not consistent with the ID value of the camera module supported by the chip, adding the configuration parameters of the camera module to be configured into the chip software drive, and detecting the camera module to be configured again.
According to the automatic detection method of the camera module, provided by the embodiment of the invention, a plurality of types of configuration parameters of the camera module are stored in the chip software drive, the main processor automatically identifies the type of the camera module accessed to the camera input system, more camera modules are supported, and meanwhile, the main processor calls the preset configuration parameters for configuration, so that the error rate is reduced, and the working production efficiency is improved. In addition, when addresses of two or more slave devices to be configured with the camera modules, which are accessed into the camera input system, are different, the main processor only needs one I2C bus to control the two or more camera modules, so that the requirement on chip pins of the main processor is reduced, the main processor can be suitable for more types of main processors, the camera input system is simplified, and the cost is saved. Simultaneously, this application can also distinguish camera module and video input interface based on the port that resets.
Corresponding to the above method, an embodiment of the present invention further provides an automatic detection system for a camera module, and referring to fig. 2, a schematic diagram of a basic structure of the automatic detection system for a camera module according to the embodiment of the present invention is provided. In connection with fig. 2, the system comprises: main processor and a plurality of camera module, wherein: the camera modules are connected to the main processor; the main processor comprises a parameter configuration unit, and configuration parameters of camera module types supported by all the main processor are configured in the parameter configuration unit. Specifically, the main processor comprises an image processing unit, an I2C controller and a plurality of video access ports, the camera modules are respectively connected to the video access ports, and the video access ports are all connected to the image processing unit; the I2C controller is connected to the camera module through an I2C bus.
Fig. 2 illustrates a dual-camera input system, two camera modules respectively access two independent video input interfaces of a main processor, the models of the first camera module 2 and the second camera module 3 may be the same or different, and if the models are the same, the image sensor of the camera module of the model is required to support a plurality of I2C slave addresses, that is, the first camera module 2 and the second camera module 3 have different slave addresses on the premise that the I2C controller 7 controls the two camera modules through an I2C bus 8. The main processor 1 provides the data received by the two video input interfaces, namely the first video access port 4 and the second video access port 5, for the image processing unit 6 to process, and the image processing unit 6 can receive the two paths of data in parallel, and then completes the processing of black level correction, dead pixel repair, demosaicing, noise reduction, sharpening, automatic exposure correction, automatic focusing, automatic white balance and the like.
In order to further optimize the above technical solution, the system further includes: a number of reset ports and a reference clock. The main processor 1 simultaneously provides a reference clock to the two camera modules through the reference clock line 11, and the reference clock is used for the working clocks of the two camera modules or the reference clock of the phase-locked loop. In addition, the first camera module 2 is connected to a first reset port through a first reset wire 9, the first reset port is tied to the first video access port 4, the second camera module 3 is connected to a second reset port through a second reset wire 10, and the second reset port is tied to the second video access port 5. When the first reset port is at an active level, the first camera module is in a reset state, and the operation of reading the ID register of the first camera module 2 by the I2C bus fails; similarly, when the second reset port is active, the I2C bus will fail to read the ID register of the second camera module 3.
The main processor 1 detects the model of a group of camera modules, then judges which video access port the camera module is connected to, and detects the model of the camera module, referring to the automatic detection method of the camera module, which is not described herein again. When the main processor 1 detects the model of a group of camera modules, the main processor 1 sets the first reset port to be an active level, and the second reset port to be an inactive level. The I2C bus reads the ID register value according to the slave device address of the camera module with the detected model, if the I2C reading operation reports an error or the ID register value is not matched with the camera module ID value any more, the first reset port successfully resets the detected camera module, the detected camera module is connected to the first video access port 4, the main processor records that the detected camera module is the first camera module 2, and meanwhile, the first reset port is an invalid level, and parameters of the first camera module 2 are configured. If I2C reads the ID register value successfully and matches the ID register value with the ID value of the camera module, it indicates that the first reset port resets the module and fails, and the detected camera module is not connected to the first video access port 4, and the main processor 1 executes the subsequent steps.
The main processor 1 sets the first reset port to an inactive level and the second reset port to an active level. The I2C bus uses the same slave address again to read the ID register value, if the I2C read operation reports an error or the ID register value is no longer matched with the ID value of the camera module, it indicates that the second reset port successfully resets the detected camera module, and further indicates that the detected camera module is connected to the second video access 5, the main processor 1 records that the detected camera module is the second camera module 3, and the second reset port is set to an invalid level, and further configures parameters of the second camera module 3, if the I2C reads the ID register value successfully and matches the ID register value with the ID value of the camera module, it indicates that the second reset port resets the module and fails, and the detected camera module is not connected to the second video access 5. If all the above modules fail to be reset, I2C of the first camera module 2 and the second camera module 3 may have the same slave address and the same ID register value, and an error message may be returned.
In the automatic detection system for the camera modules provided by the embodiment of the invention, the number of the I2C buses is 1, or the number of the I2C buses is the same as that of the camera modules. Referring to fig. 3, a schematic diagram of a basic structure of another automatic detection system for a camera module according to an embodiment of the present invention is provided. In conjunction with fig. 2 and fig. 3, a dual-camera input system is taken as an example. When the slave device addresses of the first camera module 2 and the second camera module 3 accessing the camera input system are different, the number of the I2C buses is 1, that is, as shown in fig. 2. When the slave addresses of the first camera module 2 and the second camera module 3 accessing the camera input system are the same, the number of the I2C buses is equal to the number of the camera modules accessing the camera input system, that is, as shown in fig. 3.
Since the above embodiments are all described by referring to and combining with other embodiments, the same portions are provided between different embodiments, and the same and similar portions between the various embodiments in this specification may be referred to each other. And will not be described in detail herein.
It is noted that, in this specification, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit structure, article, or apparatus. Without further limitation, the presence of an element identified by the phrase "comprising an … …" does not exclude the presence of other like elements in a circuit structure, article or device comprising the element.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (9)
1. An automatic detection method for a camera module is characterized in that configuration parameters of all camera module models supported by a chip are preset in a chip software driver, and the method comprises the following steps:
sending an operation request to a camera module to be configured, and judging whether a response exists;
if the camera module to be configured responds to the operation request, acquiring an ID register value of the camera module to be configured;
comparing the ID register value with any camera module ID value supported by the chip;
if the ID register value is consistent with the ID value of the camera module supported by the chip, calling the camera module configuration parameters of the ID register value supported by the chip, and performing configuration adjustment on the camera module to be configured;
the method comprises the following steps that a reset port is bound to a video access port, and when two or more to-be-configured camera modules with different equipment addresses are accessed into a camera input system, after the to-be-configured camera modules are configured and adjusted, the method further comprises the following steps:
setting a reset port of any detected type of camera module to be configured as an effective level, and setting the rest reset ports as invalid levels;
reading an ID register value according to the address of the camera module to be configured with the detected model;
if the error is reported or the ID register value is not matched with the ID value of the detected type of the camera module to be configured, connecting the detected type of the camera module to be configured to the video access port bound with the reset port set as the effective level;
and if the detected type of the camera module to be configured is successfully matched with the video access port, judging the types of the rest camera modules and the positions of the bound video access ports until the detection of all the camera modules to be configured, which are accessed into the camera input system, is completed.
2. The method for automatically detecting the camera module according to claim 1, further comprising:
if the operation request is not responded, or the ID register value is inconsistent with the ID value of the camera module supported by the chip, adding the configuration parameters of the camera module to be configured into the chip software drive;
and detecting the camera module to be configured again.
3. The method for automatically detecting the camera module according to claim 1, wherein the sending an operation request to the camera module to be configured comprises: the operation request is sent over the I2C bus.
4. The method for automatically detecting the camera module according to claim 3, further comprising:
when addresses of two or more slave devices of the camera modules to be configured are different, the number of the I2C buses is 1;
when the addresses of two or more slave devices to be configured with the camera modules are the same, the number of the I2C buses is equal to the number of the camera modules accessed into the camera input system.
5. The method for automatically detecting the camera module according to claim 1, further comprising: and providing a reference clock for the camera module to be configured, wherein the reference clock is a working clock of the camera module to be configured or a reference clock of a phase-locked loop.
6. An automatic detection system of camera module, its characterized in that, the system includes: main processor, a plurality of camera module and a plurality of ports that reset, wherein:
the camera modules are connected to the main processor;
the main processor comprises a parameter configuration unit and a plurality of video access ports, configuration parameters of camera module types supported by the main processor are configured in the parameter configuration unit, the camera modules are respectively and correspondingly connected to the video access ports, and the video access ports are all bound with the reset ports;
the host processor is configured to: sending an operation request to a camera module to be configured, and judging whether a response exists; if the camera module to be configured responds to the operation request, acquiring an ID register value of the camera module to be configured; comparing the ID register value with any supported camera module ID value; if the ID register value is consistent with the ID value of the supported camera module, calling the camera module configuration parameters of the ID register value, and performing configuration adjustment on the camera module to be configured;
when two or more to-be-configured camera modules with different slave device addresses are connected into a camera input system, after the configuration adjustment is performed on the to-be-configured camera modules, the main processor is further configured to: setting a reset port of any detected type of camera module to be configured as an effective level, and setting the rest reset ports as invalid levels; reading an ID register value according to the address of the camera module to be configured with the detected model; if the error is reported or the ID register value is not matched with the ID value of the detected type of the camera module to be configured, connecting the detected type of the camera module to be configured to the video access port bound with the reset port set as the effective level; and if the detected type of the camera module to be configured is successfully matched with the video access port, judging the types of the rest camera modules and the positions of the bound video access ports until the detection of all the camera modules to be configured, which are accessed into the camera input system, is completed.
7. The system of claim 6, wherein said main processor comprises an image processing unit and an I2C controller, said video access ports are connected to said image processing unit;
the I2C controller is connected to the camera module through an I2C bus.
8. The system for automatic detection of a camera module of claim 7, further comprising: and the reference clock is used for a working clock or a phase-locked loop of the camera module.
9. The system of claim 7, wherein the number of I2C buses is 1, or the number of I2C buses is the same as the number of camera modules.
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| CN112073638B (en) * | 2020-09-10 | 2022-02-15 | 深圳创维－Rgb电子有限公司 | Camera angle control method, device and equipment and computer storage medium |
| CN112684319B (en) * | 2020-12-16 | 2022-11-22 | 海光信息技术股份有限公司 | Chip inspection tracking method and device |
| CN114995919B (en) * | 2022-08-03 | 2023-01-13 | 海的电子科技(苏州)有限公司 | Method and equipment for adaptively configuring MIPI module initialization code |
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| CN201600404U (en) * | 2009-11-18 | 2010-10-06 | 深圳市度信科技有限公司 | Multifunctional camera test plate |
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| CN102263904B (en) * | 2011-08-17 | 2013-06-26 | 华为终端有限公司 | Method and system for controlling double cameras and electronic equipment with double cameras |
| JP2014110512A (en) * | 2012-11-30 | 2014-06-12 | Canon Inc | Image processing device, control method therefor and program |
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