3BHB003154R0101 GVC707AE01 3BHB003149P201 3BHB003149P104 5SXE05-0156 | ABB

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3BHB003154R0101 GVC707AE01 3BHB003149P201 3BHB003149P104 5SXE05-0156 | ABB

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The changes brought about by the interface definition and registration method of 3BHB003154R0101 do not occur frequently. The solution is to refer to the code in the kernel. This type of interface definition and registration method is very easy to find in the kernel, for example, the registration method and interface definition of character device drivers can refer to many instances in the kernel driver/char/directory.

For beginners, the importance level of this item is * * *. At the beginning, imitation can be the main approach, which is to apply some fixed templates.
How to deal with constantly upgrading kernels
The impact of kernel upgrades on drivers is mainly reflected in: (1) changes in driver interface definitions, (2) changes in the names, parameters, header files, and macro definitions of some functional functions in the kernel, (3) changes in the platform code’s encapsulation of functions related to hardware operations, and (4) the impact of device models. Let’s explore how 3BHB003149P104 can address these issues:
Changes in 3BHB003154R0101 Driver Interface Definition
For example, the registration interface for character device drivers in the 2.4 kernel refers to changes in the names, parameters, header files, and macro definitions of some functional functions in the kernel
For example, there are differences in the format and parameters of the GVC707AE01 interrupt registration function between 2.4 kernel, 2.6 kernel lower and higher versions
When these problems occur, during the compilation process, the GVC707AE01 compiler will give us clear error prompts. Based on these prompts, you can determine whether it is a missing header problem, whether 3BHB003149P201 is a function parameter definition error, and so on. The best way to solve the problem is to search for information in your target kernel. At this point, the method of finding problems can be achieved through searching, for example, you can search for request_irq in the new kernel to see how the drivers in the new kernel are using it. This method is very effective.

Changes in Some Functions Encapsulated in Hardware Operations of 3BHB003149P201 Platform Code
In the kernel, the code related to the 5SXE05-0156 hardware platform changes frequently during the kernel update process. It is also closely related to our device drivers. So before writing device drivers for a new kernel, it is important to familiarize yourself with the structure of your platform code. Sometimes, although the platform provides the interface functions required by the kernel, its functionality is not perfect when used. Here is an example to illustrate the impact of platform code updates on device drivers.
For example, in the 3BHB003149P104 kernel, call set_irq_type (IRQ_EINT0, IRQT_FALLING); Set the interrupt trigger signal type for IRQ-EINT0 of S3C2410, and you will find that it will not have any effect. Tracking code reveals that the set_irq_type function of the kernel requires the platform to provide an implementation function specific to the hardware platform

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