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1、第1页/共13页摘要本文从硬件和软件两方面介绍了MCS-51单片机温度控制系统的设计思路，对硬件原理图和程序框图作了简捷的描述。关键词；MCS-51单片机；温度；软硬件；硬件原理图；程序框图；设计单片机是指一个集成在一块芯片上的完整计算机系统。尽管他的大部分功能集成在一块小芯片上，但是它具有一个完整计算机所需要的大部分部件：CPU、内存、内部和外部总线系统，目前大部分还会具有外存。同时集成诸如通讯接口、定时器，实时时钟等外围设备。而现在最强大的单片机系统甚至可以将声音、图像、网络、复杂的输入输出系统集成在一块芯片上。1目的和意义1.1 设计的目的（1）掌握 A/D 和 D/A 转换与单片机的接
2、口连线。（2）了解 A/D 和 D/A 芯片转换性能及编程方法。（3）通过实验了解单片机如何进行数据采集。（4）进一步掌握八段数码管的使用和编程方法。（5）了解八段数码管显示的原理。1.2 设计方案水位控制系统包括水位检测和阀门开度的控制。水位信号可以通过压力传感器检测得到，阀们开度由输出的电压进行控制。采用单片机单片机来控制水箱水位可以更好的达到自动化，可以取得较好的控制效果具体说明如下图1第2页/共13页图 1 2硬件电路的设计2.1 CPU 系统图 2 为主机系统电路图。控制功能一般，程序并不复杂。因此选择 8031 作为 CPU，选择 2732（4K）作为 EPROM，74LS373作
3、为低 8位地址锁存器。图 2 2.2 压力检测系统采用单片机作为数字控制器的处理器，其中，由压力变送器传送来的电流信号经过A/D 转换进入微处理器，经微处理器计算处理，将输出数字量进行D/A 转换送给电动执行机构，具体结构如图3文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A
4、6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8
5、R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB
6、8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM
7、7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2
8、O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:
9、CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9第3页/共13页图3 2.3 水位设
10、定图 4 为键盘输入电路。水位可以在 0 到 3M范围内随意设定，利用键盘设定水位，存储在 51H（键盘输入的数值）与存储在50H（检测的数据）先比较是否相同，如相同，则向DAC0832 发送 0，否则，将两数据相减，然后向DAC0832 发送相减值。DAC0832 根据数值输出控制信号（1-5V）对应阀门开度（0%-100%）图4 2.4 压力显示电路图5为水位显示电路。水位值采用LED 数码显示，每 1s刷新一次显示值。为了不扩展并行 I/O 口，本设计利用串行口的移位功能，扩展为3位静态显示电路。P2.6为输出控制，当 P2.6=1时，允许串行口输出数据给移位寄存器；当P2.6=0时，串
11、行口不能输出数据，显示内容不变。LED3 显示十位水位值，LED2 显示个位水位值，LED1 显示十分位值，小数点固定在LED2 上文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7
12、 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文
13、档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4
14、X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9
15、A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E
16、9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4
17、B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9第4页/共13页图5 3.软件设计根据以上已经具体化的硬件设计，就可以进行软件的总体设计和模块设计。3.1 设计思路由水位传感器检测
18、输入，启动A/D 转换并将转换值暂存50H 单元，将转换得来的十六进制数转换为十进制数，十分、个、十位分别存于35H、36H、37H单元，送由 3 位八段数码管显示。同时将此检测值与设定值（51H）比较，差值大于 2时报警并进行调节处理，差值小于2时，不处理。处理完毕后返回水位采集模块，设定值用外部中断1 方式进行设定。3.2 主程序图 6 为系统总体流程图。将定时器T0，设置为计数器方式，计数初值为最大值为 FFFFH，当键盘键入时，则计数器产生溢出中断。执行中断子程序。主程序ORG 0000H LJMP MAIN ORG 0003H LJMP JPSR ORG 0050H MAIN：MOV
19、 TMOD，#06H ；T0计数器，方式 2 MOV TH0，#0FFH ；置 T0初值 MOV TL0，#0FFH 文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R
20、8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8
21、J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7
22、A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O
23、8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:C
24、B8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 H
25、M7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9第5页/共13页 SETB EA ；开中断 SETB ET0 ；开外部中断 0 SETB TR0 ；开启 T0 LCALL DELAY ；延时 1
26、S LCALL TADC ；调用水位检测子程序 LCALL DISP ；调用水位显示子程序 LCALL CONT ；调用水位控制子程序STMP MAIN 图6为系统总体流程图3.3 水位检测子程序图 7 为水位检测子程序流程图。ADC0809 是 CMOS 工艺的八位逐次比较型A/D转换器。它由 8 选 1 模拟开关，8位 A/D转换器及输出三态缓冲器组成，由三个文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8
27、R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB
28、8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM
29、7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2
30、O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:
31、CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10
32、HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 Z
33、X2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9第6页/共13页地址信号 ADDA、ADDB、ADDC 来决定哪一路模拟信号进行A/D 转换。水位检测值存入 50H，A/D 转用查询方式。水位检测程序如下：ORG 0600H TADC：MOV 50H，#00H MOV DPTR，#7FF8H ；置 0809 通道地址TT0：MOVX DPTR，A ；启动 0809A/D转换 JB INT1，$；等待 A/D 转换结束 MOVX A，DPTR ；读 A/D 转换值 MOV 50H，A RET 图 7 为水位检测子程序流程图3.4 水位控制子程
34、序文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4
35、B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6
36、H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U
37、9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1
38、O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6
39、D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R
40、8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9第7页/共13页图 8 为水位控制子程序流程图。水位控制子程序的功能是将水位测量值（存于 50H）与设定值（存于51H）作比较，是否相同，如相同，则向DAC0832 发送0，否则，将两数据相减，然后向DAC0832 发送相减值。DAC0832 根据数值输出控制信
41、号（1-5V）对应阀门开度（0%-100%）水位检测程序如下CNNT：MOV A，50H SUBB A，51H MOV R1#0FEH MOVX R1 A RET 3.5 水位显示子程序图 8 为水位显示子程序流程图。利用控制微机的串行口，通过串入并出的移位寄存器 74LS164设计 LED显示器接口，尤其当需要远程显示时，采用串行传输会减少数据线数量，提高传输可靠性。本设计利用 74LS164扩展 3 片 LED显示器的接口电路，图中采用的是共阳极LED显示器，74LS164本身吸收电流达 8mA，可以直接驱动 LED显示器，限流电阻值选为390。水位显示子程序如下：ORG 1F00H DI
42、SP：MOV A，50H ；读取检测值 MOV B，#100 DIV AB MOV 37H，A ；十位存于 37H MOV A，B MOV B，#10 DIV A B MOV 36H，A ；个位存于 36H MOV A，B MOV 35H，A ；十分位存于 35H MOV SCON，#00H ；设置串行口方式0 文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM
43、7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2
44、O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:
45、CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10
46、HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 Z
47、X2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编
48、码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X1
49、0 HM7A6D6H9A7 ZX2O8R8U9E9第8页/共13页 CLR ES ；关串行口中断 SETB P2.6 ；允许串行口输出数据 MOV R7，#03H MOV R0，#35H XS：MOV A，R0 ；取显示数 MOV DOTR,#2000H；置段码表首址 MOVC A,A+DPTP ；查询显示码 MOV SUBF,A ；送显示 JNB TI,$；一帧末发送完，等待 CLR IT；清中断标志INT R0 ；取下一个数DJNZ R7,XS RET ORG 2000H TAB:DB 03H,9FH,25H,0DH;0,1,2,3 DB 99H,49H,41H,1FH;4,5,6,7 D
50、B 01H,09H;8,9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9文档编码:CB8J1O4B4X10 HM7A6D6H9A7 ZX2O8R8U9E9