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实验十

实验十. A/D 转换实验. 实验要求. 1 、利用实验板上的 ADC0809 做 A/D 转换器，实验板上的电位器提供模拟量输入，编制程序，将模拟量转换成二进制数字量，用发光二极管显示。. 实验目的. 1. 掌握 A/D 转换与单片机的接口方法。 2. 了解 A/D 芯片 ADC0809 转换性能及编程。 3. 通过实验了解单片机如何进行数据采集。. 实验电路及连线. 开始. 初始化. 启动 A/D. 否. A/D 转换完. 数据输出. 清读数标志. 程序框图. 程序清单. CS0809 equ 08000h mov dptr, #CS0809

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实验十

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  1. 实验十 A/D转换实验

  2. 实验要求 • 1、利用实验板上的ADC0809做A/D转换器，实验板上的电位器提供模拟量输入，编制程序，将模拟量转换成二进制数字量，用发光二极管显示。

  3. 实验目的 • 1.掌握A/D转换与单片机的接口方法。 • 2.了解A/D芯片ADC0809转换性能及编程。 • 3.通过实验了解单片机如何进行数据采集。

  4. 实验电路及连线

  5. 开始 初始化 启动A/D 否 A/D转换完 数据输出 清读数标志 程序框图

  6. 程序清单 CS0809 equ 08000h mov dptr, #CS0809 mov a, #0 movx @dptr, a ; 起动A/D mov a, #40h djnz ACC, $ ; 延时> 100us movx a, @dptr ; 读入结果 ljmp $ end

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