基于51单片机的数字电压表
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2023-04-06
17:08:47
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1
1 绪论 ...............................................................................................................................................2
1.1 电压表概述 .......................................................................................................................3
1.2 设计目的和意义研究的目的 ...........................................................................................3
1.3 课题设计要求 ...................................................................................................................3
2 数字电压表系统硬件设计...........................................................................................................4
2.1 系统设计框图 ...................................................................................................................4
2.2 硬件方案选择 ...................................................................................................................5
2.2.1 单片机芯片的选择方案和论证.............................................................................5
2.2.2 显示的选择 .............................................................................................................5
2.3 硬件模块电路设计 ...........................................................................................................5
2.3.1 单片机最小系统......................................................................................................5
2.3.2LCD1602 显示模块 ..................................................................................................7
2.3.3PCF8 591 模块电路设计.........................................................................................14
3 数字电压表系统软件设计.........................................................................................................20
3.1 主总流程图 .....................................................................................................................20
3.2 软件模块实现 .................................................................................................................20
3.2.1 串口初始化 ...........................................................................................................20
3.2.2 LCD1602 初始化 ....................................................................................................20
3.2.3 PCF8591 软件设计.................................................................................................22
4 结论 ............................................................................................................................................26
4.1 总结 .................................................................................................................................26
4.2 心得体会 .........................................................................................................................26
致 谢 ........................................................................................................................................27
参考文献 ........................................................................................................................................28
程序附录 ........................................................................................................................................29
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