Speaking on a cumulative timer interrupt frequency using LED lights flashing, this example also shows my first real full procedural framework: With a switch statement to achieve a state machine, plus a timer interrupt. This framework may seem simple, actually so simple. I do all the development projects are based on this simple framework, But it is very easy to use. Previous section only a single task LED lights flashing, this festival started, we multi-task a buzzer alarm increases, the knowledge to teach you four points: First point: Driver Framework buzzer preparation. The second point: the procedural framework of multi-tasking. The third point: how to control the buzzer sounds and the short length is called is called. The fourth point: How do you know how much a 1 second timer interrupt, which is how a pro rata correction time accuracy. Details, see the source code to explain. Function: run two tasks simultaneously, the first task to make a LED light fla

第05节：蜂鸣器的驱动程序.c

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