目 录
1 设计方案比较与分析..........................................................................................................1
1.1 电机调速控制模块......................................................................................................1
1.2 PWM 调速工作方式......................................................................................................1
1.3 PWM 调脉宽方式 ..........................................................................................................2
1.4 PWM 软件实现方式......................................................................................................2
2 系统分析与设计...................................................................................................................2
2.1 系统的硬件电路设计与分析 ....................................................................................3
2.2 系统的软件设计 ..........................................................................................................4
2.2.1 实验程序流程 ......................................................................................................5
2.2.2 PWM 脉宽控制 ......................................................................................................8
2.2.3 键盘中断处理子程序 .........................................................................................9
2.2.4 显示子程序...........................................................................................................9
2.2.5 定时中断处理程序 ...........................................................................................10
3 测试结果与分析.................................................................................................................11
致 谢 ...................................................................................................................................12
参考文献.................................................................................................................................13
