Eighth Reading notes

This chapter describes the principle of buzzer driver implementation.

The buzzer is a hardware device on the s3c6410 Development Board. You can control the buzzer by writing a specific value to the register.

The buzzer is realized by the principle that the PWM driver differs from the LED driver, and the PMW drive will consist of multiple files.

Simulation Environment:/ROOT/DRIVERS/CH08/PWM

The PWM driver consists of 3 files:

PWM.C Driver Main Program

Pwm_fun.h refers to the corresponding header file and defines some macros.

The Pwm_fun.c file contains two functions for opening and stopping the PWM (Pwm_start and Pwm_stop)

This chapter also describes a method of forcibly uninstalling Linux drivers. For: Initialization function crashes, unload function is blocked.

http://www.cnblogs.com/xi940626/

Eighth Reading notes