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catalogue i2c module block diagram ug-1085(ch22) 2. Device tree of controller and slave devices 3. Check i2c controller driver registration process: standard platform driver framework Interface for reading temperature from the device: The essence of reading and writing: finally, it is to read and write through adapter - > algo in the cl ...

14. Device tree 1. What is a device tree? Device tree is a data structure that describes hardware resources. It transmits hardware resources to the kernel through bootloader, making the description of kernel and hardware resources relatively independent. 2. Origin of device tree To understand why there is a device tree and how it comes from ...

Linux applications usually have three ways to query whether device drivers can be accessed: blocking, non blocking and asynchronous notification. Asynchronous notification: "signal" came into being. The signal is similar to the "interrupt" used in our hardware, but the signal is at the software level. It can be regarded as ...

Turn from https://edu.csdn.net/lecturer/505 Teacher Zhu Internet of things lecture hall 5.linux driver development - Part 5 - 5.5.linux device driver model Part I contents of chapters 5.5.1. Introduction to Linux device driver model 5.5.2. Underlying architecture of device driven model 5.5.3. Bus device drive organization 5.5.4. Introduction t ...

As a driver author, you may find that you have to download firmware into a device before it can work Competition in many parts of the hardware market is so intense that manufacturers are reluctant to spend even a little of the cost of EEPROM used as device control firmware Therefore, the firmware is released on a CD with the hardware, ...

1, Open the road of driving development 1. Preparation for driving development (1) The development board of linux system running normally. It is required that the zImage of linux in the development board must be compiled by itself and cannot be compiled by others. Because you need a kernel source tree. (2) The kernel source code tree is ac ...

1, What is a drive frame 1. Who wrote the driver (1) Drive development engineer (2) Kernel maintainer 2. Driver programming collaboration requirements (1) The interface should be standardized. Don't make a mess. There are several sets of interfaces (2) Minimize the difficulty of driving developers 3. What is the driver framework (1) The ...