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2021年单片机课程笔记.pdf

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1、注意：本课件为上课笔记的一个整理，其中难免存在错误，请读者不吝赐教，如有问题请发送 E-mail到。本文根据教学的情况，随时进行修改和完善，所以欢迎同学随时注意本文档在课件中的更新情况。单片机基础知识单片机的外部结构：1、DIP40 双列直插；2、P0，P1，P2，P3 四个 8 位准双向 I/O 引脚；（作为 I/O 输入时，要先输出高电平）3、电源 VCC（PIN40）和地线 GND（PIN20）；4、高电平复位RESET（PIN9）；（10uF 电容接 VCC 与 RESET，即可实现上电复位）5、内置振荡电路，外部只要接晶体至X1（PIN18）和 X0（PIN19）；（频率为主频的12

2、倍）6、程序配置 EA（PIN31）接高电平VCC；（运行单片机内部ROM 中的程序）7、P3 支持第二功能：RXD、TXD、INT0、INT1、T0、T1 单片机内部I/O 部件：(所为学习单片机，实际上就是编程控制以下I/O 部件，完成指定任务)1、四个 8 位通用 I/O 端口，对应引脚P0、P1、P2和 P3；2、两个 16 位定时计数器；（TMOD，TCON，TL0，TH0，TL1，TH1）3、一个串行通信接口；（SCON，SBUF）4、一个中断控制器；（IE，IP）针对 AT89C52 单片机，头文件AT89x52.h 给出了 SFR 特殊功能寄存器所有端口的定义。教科书的160

3、页给出了针对MCS51 系列单片机的C 语言扩展变量类型。C 语言编程基础：1、十六进制表示字节0 x5a：二进制为01011010B；0 x6E 为 01101110。2、如果将一个16 位二进数赋给一个8 位的字节变量，则自动截断为低8 位，而丢掉高8 位。3、+var 表示对变量var 先增一；var表示对变量后减一。4、x|=0 x0f;表示为x=x|0 x0f;5、TMOD=(TMOD&0 xf0)|0 x05;表示给变量TMOD 的低四位赋值0 x5，而不改变TMOD 的高四位。6、While(1);表示无限执行该语句，即死循环。语句后的分号表示空循环体，也就是;第一章单片机最小

4、应用系统：单片机最小系统的硬件原理接线图：1、接电源：VCC（PIN40）、GND（PIN20）。加接退耦电容0.1uF 2、接晶体：X1（PIN18）、X2（PIN19）。注意标出晶体频率（选用12MHz），还有辅助电容30pF 3、接复位：RES（PIN9）。接上电复位电路，以及手动复位电路，分析复位工作原理4、接配置：EA（PIN31）。说明原因。|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 41 页具体接法如下图所示：第二章基本 I/O 口的应用。例 1：用 P1口输出一倍频方波。#include /reg52.h为包含 5

5、1 资源的库文件void main(void)while(1=1)+P1;/使 P1口加一完成一倍频方波，注意：P0的每个引脚要输出高电平时，必须外接上拉电阻（如4K7）至VCC电源。例 2：用 P1口输出一倍频方波,要求能用万用表测出方波。其实，只需要在上面的程序中添加延时程序即可。#include void main(void)unsigned int i,j;while(1=1)+P1;for(i=0;i1000;i+)|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 41 页文档编码:CR5T1D3S10P8 HV4O3Z6B2

6、B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3

7、F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N

8、5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编

9、码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T

10、1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10

11、P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4

12、O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1文档编码:CR5T1D3S10P8 HV4O3Z6B2B6 ZX3F10Q9N5W1for(j=0;j1000;j+);/该循环是一个大概的延时，具体时间要看汇编语言的指令才能判断。例 3：要求从 P1口输出一方波，要求P1.7 变化的最快，P1.0 变化的最慢。#include void main(vo

14、;j1000;j+);注意：一个字节的8位D7、D6至D0，分别输出到P3.7、P3.6至P3.0，比如P3=0 x0f，则P3.7、P3.6、P3.5、P3.4四个引脚都输出低电平，而P3.3、P3.2、P3.1、P3.0四个引脚都输出高电平。同样，输入一个端口P2，即是将P2.7、P2.6至P2.0，读入到一个字节的8位D7、D6至D0。第三章显示驱动数码管的接法和驱动原理一支七段数码管实际由8 个发光二极管构成，其中7 个组形构成数字8 的七段笔画，所以称为七段数码管，而余下的1 个发光二极管作为小数点。作为习惯，分别给8 个发光二极管标上记号：a,b,c,d,e,f,g,h。对应 8

15、的顶上一画，按顺时针方向排，中间一画为g，小数点为h。我们通常又将各二极与一个字节的8 位对应，a(D0),b(D1),c(D2),d(D3),e(D4),f(D5),g(D6),h(D7)，相应 8个发光二极管正好与单片机一个端口Pn 的 8 个引脚连接，这样单片机就可以通过引脚输出高低电平控制8个发光二极的亮与灭，从而显示各种数字和符号；对应字节，引脚接法为：a(Pn.0)，b(Pn.1)，c(Pn.2)，d(Pn.3)，e(Pn.4)，f(Pn.5)，g(Pn.6)，h(Pn.7)。如果将 8 个发光二极管的负极（阴极）内接在一起，作为数码管的一个引脚，这种数码管则被称为共阴数码管，共同

16、的引脚则称为共阴极，8 个正极则为段极。否则，如果是将正极（阳极）内接在一起引出|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 41 页文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M

17、1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9

18、U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10

19、F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X

20、2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9

21、V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B

22、10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3的，则称为共阳数码管，共同的引脚则称为共阳极，8 个负极则为段极。以

23、单支共阴数码管为例，可将段极接到某端口Pn，共阴极接GND，则可编写出对应十六进制码的七段码表字节数据如下图：动态显示的电路连接如下图所示：P1口|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页，共 41 页文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:

24、CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 H

25、X6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 Z

26、K7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编

27、码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4

28、 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7

29、 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3下

30、面，我们编程在数码管上显示出“1 2 3 4”。程序如下：#include Code unsigned char Seg7Code16=/用十六进数作为数组下标，可直接取得对应的七段编码字节/0 1 2 3 4 5 6 7 8 9 A b C d E F 0 x3f,0 x06,0 x5b,0 x4f,0 x66,0 x6d,0 x7d,0 x07,0 x7f,0 x6f,0 x77,0 x7c,0 x39,0 x5e,0 x79,0 x71;void main(void)unsigned int i;while(1)P2|=0 x0f;/消隐，让数码管开始处于不亮的状态P0=LedCode1

31、;/将“1”的代码送出P2&=0 xfe;/选中第一个数码管for（i=0;i1000;i+）;P2|=0 x0f;P0=LedCode2;P2&=0 xfd;for（i=0;i1000;i+）;P2|=0 x0f;P0=LedCode3;P2&=0 xfb;for（i=0;i1000;i+）;P2|=0 x0f;P0=LedCode4;P2&=0 xf7;for（i=0;i1000;i+）;关于 DRIVER 编写 DRIVER 的目的是让程序能适应更多的场合，让我们的使用更加方便，大家可以把一些自己编过的有用的程序做成DRIVER 便于自己以后的使用。下面介绍显示的驱动程序：首先，定义一个

32、头文档，描述可用函数，如下：#ifndef _ LedDriver_H _/防止重复引用该文档，如果没有定义过符号_KEY_H_，则编译下面语句#define _ LedDriver_H _/只要引用过一次，即#include ，则定义符号_KEY_H_ void LedPrint(unsigned char Dat)/数据缓冲区间，完成移位功能void LedWork(void)/送数到显示数码管|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 5 页，共 41 页文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3

33、文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R

34、9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J

35、5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1

36、Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U

37、8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F

38、3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2

39、M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3#endif然后，定义函数体文档LedDriver.C，如下：#include#include“LedDriver.h”Code unsigned char LedCode16=/Code 是表示这个数组的存储空间0 x3f,0 x06,0 x5b,0 x4f,0 x66,0 x6d,0 x7d,0 x07,0 x7f,0 x6f,0 x77,

40、0 x7c,0 x39,0 x5e,0 x79,0 x71;unsigned char DisBuf4;void LedPrint(unsigned char Dat)DisBuf0=DisBuf1;/每次用后一个数冲掉前一个数，便于扩展显示位数DisBuf1=DisBuf2;DisBuf2=DisBuf3;DisBuf3=Dat;void LedWork(void)static unsigned char i=0;/static 表示静态变量，指变量的赋值只在第一次定义的时候赋P2|=0 x0f;P0=LedCodeDisBufi;Switch(i)/选择数据送到哪个管子 case 0:P2

41、_0=0;break;case 1:P2_1=0;break;case 2:P2_2=0;break;case 3:P2_3=0;break;if(+i=4)i=0;/判断四位数是否都已经送完for(m=0;m1000;m+);/延时这样 DRIVER 的程序就编好了，我们以后用的时候直接调用函数就可以了。主程序可以编写如下：#include#include“LedDriver.h”void mian(void)LedPrint(1);/调用函数，把想显示的数据送如缓存LedPrint(2);LedPrint(3);|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|

42、迎.|下.|载.第 6 页，共 41 页文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y

43、4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:C

44、F9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX

45、6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK

46、7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码

47、:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4

48、HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3文档编码:CF9V9U8R9M4 HX6B10F3J5T7 ZK7Y4X2M1Q3LedPrint(4);While(1)LedWork();下面介绍一个例子供大家参考。显示“”P1 端口接 8 联共阴数码管SLED8 的段极：P1.7 接段 h,，P1.0 接段 a P2 端口接 8 联共阴数码管SLE

49、D8 的段极：P2.7 接左边的共阴极，P2.0 接右边的共阴极方案说明：晶振频率fosc=12MHz，数码管采用动态刷新方式显示，在1ms定时断服务程序中实现#include unsigned char DisBuf8;/全局显示缓冲区，DisBuf0 对应右 SLED，DisBuf7 对应左 SLED，void DisplayBrush(void)code unsigned char cathode8=0 xfe,0 xfd,0 xfb,0 xf7,0 xef,0 xdf,0 xbf,0 x7f;/阴极控制码code unsigned char Seg7Code16=/用十六进数作为数组下

50、标，可直接取得对应的七段编码字节0 x3f,0 x06,0 x5b,0 x4f,0 x66,0 x6d,0 x7d,0 x07,0 x7f,0 x6f,0 x77,0 x7c,0 x39,0 x5e,0 x79,0 x71;static unsigned char i=0;/（0 i 7）循环刷新显示，由于是静态变量，此赋值只做一次。P2=0 xff;/显示消隐，以免下一段码值显示在前一支SLED P1=Seg7Code DisBufi;/从显示缓冲区取出原始数据，查表变为七段码后送出显示P2=cathode i;/将对应阴极置低，显示if(+i=8)i=0;/指向下一个数码管和相应数据 vo

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