Connected to a source delay () function consumes delay too long, there is no opportunity to perform other tasks, how can we improve? This section will teach you the use of the cumulative number of cycles of the main ways to solve this problem. In this section you two knowledge points to the church: First point: the use of the cumulative number of methods to achieve the main loop time delay The second point: switch statement at the beginning of the core experience. All projects are based on the actual switch statement to achieve parallel processing of multiple tasks. Function: make an LED blink.

第03节：累计主循环次数使LED灯闪烁.c

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