Android Deep Explore (Vol. 1) Hal with Driver development Sixth Chapter reading notes

Steps to write a Linux driver

1th Step: Build Linux driver skeleton (load and unload Linux drivers)

2nd step: Registering and unregistering device files

3rd Step: Specify driver-related information

4th step: Specify the callback function

5th step: Writing Business logic

6th step: Writing the Makefile file

7th step: Compiling Linux drivers

8th step: Install and uninstall Linux drivers

Install Linux drivers:

# Insmod Word_count.ko

To see if Word_count installed successfully:

# Lsmod | grep word_count

Uninstalling the L Inux Drive:

# Rmmod Word_count

To view log information from Linux-driven output:

# DMESG | grep Word_count | Tail–n 2

Compiling the driver into the Linux kernel for testing (using the Word_count driver example)

1th step: Put the word_count.c file into the Linux kernel source code

2nd Step: Modify the Kconfig file

3rd Step: Modify the Makefile file

4th step: Set the. config file

5th step: Compiling the Linux kernel

To add the Word_count directory to the Linux kernel source tree

1th Step: Create a new Kcinfig file

2nd Step: Modify the Makefile file

3rd Step: Modify the Kconfig file of the upper directory

4th Step: Modify the Makefile file of the upper directory

Developing and testing Linux drivers using eclipse

1th Step: Build C Project

2nd step: Establish C source code file link

3rd Step: Set the Include path

4th step: Compiling Linux drivers

Testing Linux drivers in eclipse

1th Step: Import the Test_word_count.c file

2nd step: Set the Include path

3rd Step: Set Target

4th Step: Build Project

5th step: Run the test program

After reading this chapter, this chapter has done some simple summary of the Linux driver compiling process, this chapter introduces the complete development process of Linux driver with Word_count driver as an example, this chapter not only introduces an example, but also describes how to test Linux driver using different methods. There are other ways, for example, to test Linux drivers directly using Ubuntu Linux, and there are many drivers that can be installed directly on the Android emulator, Development Board, or even the phone to test the Linux drive as soon as they are compiled again with the appropriate Linux kernel.

Android Deep Explore (Vol. 1) Hal with Driver development Sixth Chapter reading notes