Make the Development Board sound: Buzzer driver

The buzzer is a hardware device on the s3c6410 Development Board. You can control the buzzer by writing a specific value to the register. This chapter will introduce the implementation of the buzzer to the original plow and achieve a complete buzzer drive (can turn the buzzer on and off). PWM time-driven implementation is different from the LED driver, the PWM driver will be composed of several files. This is also the standard implementation of most Linux drivers. That is to say--a complex driver is unlikely to put all the code in the ... Files in a single file. It is a good idea to put the relevant code in the appropriate file. These files are co-compiled when the Linux driver is compiled. This section describes how to divide a Linux drive into multiple files. The data structure, function code in these files can also be used by several different drivers, so this is also an important method of code reuse. The PWM drive is similar to the LED driver implementation process and may be simpler. In this chapter it is only to demonstrate how to divide a Linux driver into multiple implementation files before using a relatively simple PWM driver. Through the study of this chapter, readers can master the common code reuse methods of Linux drivers. In addition, this chapter introduces a method of forcibly uninstalling Linux drivers. Through this method. Readers will be spared the pain of constantly restarting the machine.

Make the Development Board sound: Buzzer driver