51单片机C语言应用程序实例精讲

1、/*/* Copyright (c) 2004, 通信工程学院戴佳 */* All rights reserved. */* 作 者：戴佳 */*/* 4位8段数码管分别动态显示“1234”， */#include 7LEDShow.hvoid main()DIGPORT = 0;/ 关闭显示TMOD = 0x01;/ T0工作方式1/* 2ms 定时设置 */time0_tmp = 65536-time0*fosc/12;TH0 = (time0_tmp/256);TL0 = (time0_tmp%256);TR0 = 1;ET0 = 1;EA = 1;digbit = 0x01;/ 从第一

2、位数码管开始wordbuf3 = 4;wordbuf2 = 3;wordbuf1 = 2;wordbuf0 = 1;while(1); /* 定时器0中断服务子程序，定时动态扫描显示 */void time0_int(void) interrupt 1TH0 = (time0_tmp/256);TL0 = (time0_tmp%256);display();/* 根据共阴极字型编码表获取09，AB字型代码 */uchar getcode(uchar i)uchar p;switch (i)case 0: p=0x3f;break;/* 0 */case 1: p=0x06;break;/* 1

3、 */case 2: p=0x5B;break;/* 2 */case 3: p=0x4F;break;/* 3 */case 4: p=0x66;break;/* 4 */case 5: p=0x6D;break;/* 5 */case 6: p=0x7D;break;/* 6 */case 7: p=0x07;break;/* 7 */case 8: p=0x7F;break;/* 8 */case 9: p=0x67;break;/* 9 */case 10: p=0x77;break;/* A */case 11: p=0x7C;break;/* B */case 12: p=0x39

4、;break;/* C */case 13: p=0x5E;break;/* D */case 14: p=0x79;break;/* E */case 15: p=0x71;break;/* F */default: break;return(p);/* 显示函数 */void display(void)uchar i;switch (digbit)case 1:i=0;break;case 2:i=1;break;case 4:i=2;break;case 8:i=3;break;default: break;DIGPORT = 0;/ 关闭显示WORDPORT = getcode(wor

5、dbufi);/ 送字型码DIGPORT = digbit;/ 送字位码if (digbit0x08)digbit = digbit*2;else digbit = 0x01;/*/* Copyright (c) 2005, 通信工程学院 */* All rights reserved. */* 作 者：戴佳 */*/#ifndef_7LEDSHOW_H / 防止7LEDShow.h被重复引用#define_7LEDSHOW_H#include / 引用标准库的头文件#include #include #include #define uchar unsigned char #define u

6、int unsigned int #define DIGPORT XBYTE0x0200/ 定义字位口#define WORDPORT XBYTE0x0100/ 定义字型口#define fosc11.0592/ 晶振频率 #define time02000/ 定时2000usuchar digbit;/ 字位uchar wordbuf4;/ 字型码缓冲区uint idata time0_tmp; / 临时变量，用于计算定时uchar getcode(uchar i);/ 根据共阴极字型编码表获取字型代码函数void display(void);/ 显示函数#endif/*/* Copyrig

7、ht (c) 2005, 通信工程学院 */* All rights reserved. */* 作 者：戴 佳 */*/#include 8DigitShow.h/* 延时t毫秒 */void delay(uint t)uint i;while(t-)/* 对于12M时钟，约延时1ms */for (i=0;i125;i+)/* 向MAX7219写入字节（8位）*/void SendChar (uchar ch)uchar i,temp; _nop_(); for (i=0;i8;i+) temp=ch&0x80; ch=ch1; if(temp) DIN=1; CLK=0; CLK=1;

8、else DIN=0; CLK=0; CLK=1; /* 向MAX7219写入字（16位）*/void WriteWord (uchar addr,uchar num) LOAD=0; _nop_(); SendChar(addr); _nop_(); SendChar(num); _nop_(); LOAD=1;/ 锁存进相应寄存器/* MAX7219初始化 */void InitDisplay (void) WriteWord (ScanLimit,ScanDigit); / 设置扫描界限 WriteWord (DecodeMode,DecodeDigit); / 设置译码模式 Write

9、Word (Intensity,IntensityGrade); / 设置亮度 WriteWord (ShutDown,NormalOperation); / 设置为正常工作模式/* 主函数 */void main(void) InitDisplay ();/ MAX7219初始化 WriteWord(DisplayTest,TestMode);/ 开始显示测试，点亮所有LED delay(3000); / 延时约3s WriteWord (DisplayTest,TextEnd);/ 退出显示测试模式 while(1) uchar i,j;/* 8个数码管以相同间隔时间2s同时变化显示09的

10、数字 */ for (i=0;i=9;i+) delay(2000);/ 间隔约2s InitDisplay();for (j=0;j=7;j+) DisBufferj=i; WriteWord (Digit0,DisBuffer0); WriteWord (Digit1,DisBuffer1); WriteWord (Digit2,DisBuffer2); WriteWord (Digit3,DisBuffer3); WriteWord (Digit4,DisBuffer4); WriteWord (Digit5,DisBuffer5); WriteWord (Digit6,DisBuffe

11、r6); WriteWord (Digit7,DisBuffer7); /*/* Copyright (c) 2005, 通信工程学院 */* All rights reserved. */* 作 者：戴 佳 */*/#ifndef_8DIGITSHOW_H / 防止8DigitShow.h被重复引用#define_8DIGITSHOW_H#include / 引用标准库的头文件#include #define uchar unsigned char #define uint unsigned int sbit DIN = P10;/ 串行数据输入sbit CLK = P11;/ 串行时钟sb

12、it LOAD = P12;/ 显示数据锁存控制#define NoOp 0x00 / 空操作寄存器#define Digit0 0x01 / 数码管1寄存器#define Digit1 0x02 / 数码管2寄存器#define Digit2 0x03 / 数码管3寄存器#define Digit3 0x04 / 数码管4寄存器#define Digit4 0x05 / 数码管5寄存器#define Digit5 0x06 / 数码管6寄存器#define Digit6 0x07 / 数码管7寄存器#define Digit7 0x08 / 数码管8寄存器#define DecodeMode

13、 0x09 / 译码模式寄存器#define Intensity 0x0a / 亮度寄存器#define ScanLimit 0x0b / 扫描位数寄存器#define ShutDown 0x0c / 低功耗模式寄存器#define DisplayTest 0x0f / 显示测试寄存器#define ShutdownMode 0x00 / 低功耗方式#define NormalOperation 0x01 / 正常操作方式#define ScanDigit 0x07 / 扫描位数设置，显示8位数码管#define DecodeDigit 0xff / 译码设置，8位均为BCD码#define

14、IntensityGrade 0x0a / 亮度级别设置#define TestMode 0x01 / 显示测试模式#define TextEnd 0x00 / 显示测试结束，恢复正常工作模式uchar DisBuffer8=0,0,0,0,0,0,0,0; / 显示缓存区#endif/*/* Copyright (c) 2005, 通信工程学院 */* All rights reserved. */* /* 作 者：戴佳 */*/#include lcd_show.h#define uint unsigned int#define uchar unsigned char#define CSA

15、 P2_1#define CSB P2_0#define E P2_3#define RW P2_5#define DI P2_6sbit busy_bit=ACC7;/lcd state byte bit 7/*下面是对液晶屏gxm12864d操作的函数, 128x64点阵，汉字显示，CSA,CSB用来进行左右显示区的选择。*/* 发命令i到主窗口*/void lcd_mwc(uchar i) CSA=1; CSB=0; RW=1; DI=0; do ACC=LCD; while (busy_bit) ;/wait for lcd not busy RW=0; LCD=i;/* 写数据i到主

16、窗口*/void lcd_mwd(uchar i) CSA=1; CSB=0; RW=1; DI=0; do ACC=LCD; while (busy_bit);/wait for lcd not busy RW=0; DI=1; LCD=i;/* 清屏 */void lcd_clear(void) uchar i; uchar page; for (page=0xb8;page0xc0;page+) lcd_mwc(page); /*设置显示页面*/ lcd_mwc(0x40); /*设置列地址*/ for (i=0;i64;i+) lcd_mwd(0); /初始化lcdvoid lcd_i

17、nit(void)lcd_mwc(0xc0);lcd_mwc(0x3f);/dispm_hz_up() display up half of a hanzi in left areavoid dispm_hz_up(uchar code * hz)uchar i;for (i=0;i16;i+) lcd_mwd(*(hz+i);/dispm_hz_down() display down half of a hanzi in left areavoid dispm_hz_down(uchar code * hz)uchar i;for (i=16;i32;i+) lcd_mwd(*(hz+i);

18、void main(void)E=1;lcd_clear();lcd_init();lcd_mwc(0xb8);lcd_mwc(0x40);dispm_hz_up(&QING);dispm_hz_up(&CHA);dispm_hz_up(&KA);lcd_mwc(0xb9);lcd_mwc(0x40);dispm_hz_down(&QING);dispm_hz_down(&CHA);dispm_hz_down(&KA);/display 请插卡/*/* Copyright (c) 2005, 通信工程学院 */* All rights reserved. */* /* 作 者：戴佳 */*/#

19、ifndef_LCD_SHOW_H / 防止lcd_show.h被重复引用#define_LCD_SHOW_H#include #include unsigned char code QING32=/* 请 */0x20,0x22,0xEC,0x00,0x20,0x22,0xAA,0xAA,0xAA,0xBF,0xAA,0xAA,0xEB,0xA2,0x20,0x00,0x00,0x00,0x7F,0x20,0x10,0x00,0xFF,0x0A,0x0A,0x0A,0x4A,0x8A,0x7F,0x00,0x00,0x00;unsigned char code CHA32=/* 插 */0x

20、10,0x10,0x10,0xFF,0x90,0x24,0x24,0xA4,0x24,0xFC,0x22,0x23,0x22,0xB0,0x20,0x00,0x02,0x42,0x81,0x7F,0x00,0xFF,0x49,0x48,0x40,0x7F,0x40,0x49,0x49,0xFF,0x01,0x00;unsigned char code KA32=/* 卡 */0x40,0x40,0x40,0x40,0x40,0x40,0xFF,0x44,0x44,0x44,0x46,0x44,0x40,0x60,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0

21、xFF,0x00,0x02,0x04,0x0C,0x18,0x00,0x00,0x00,0x00;#define LCD XBYTE0xffff /* LCD端口 */#endif/*/* Copyright (c) 2005, 通信工程学院 */* All rights reserved. */* 作 者：戴 佳 */*/#include PWLock.h/* 键消抖延时函数 */void delay(void)uchar i;for (i=300;i0;i-);/* 键扫描函数 */uchar keyscan(void)uchar scancode,tmpcode;P1 = 0xf0; /

22、 发全0行扫描码if (P1&0xf0)!=0xf0)/ 若有键按下delay();/ 延时去抖动if (P1&0xf0)!=0xf0)/ 延时后再判断一次，去除抖动影响scancode = 0xfe;while(scancode&0x10)!=0)/ 逐行扫描P1 = scancode;/ 输出行扫描码if (P1&0xf0)!=0xf0)/ 本行有键按下tmpcode = (P1&0xf0)|0x0f;/* 返回特征字节码，为1的位即对应于行和列 */return(scancode)+(tmpcode);else scancode = (scancode1)|0x01;/ 行扫描码左移一位

23、return(0);/ 无键按下，返回值为0 /* 定时器0中断服务子程序，2ms定时动态扫描显示 */void time0_int(void) interrupt 1 /* 重置2ms定时 */TH0 = -2000/256;TL0 = -2000%256;if (showflag=1)display();/ 调用显示函数/* 定时器1中断服务子程序，50ms*/void time1_int(void) interrupt 3 uchar k;/* 重置50ms定时 */TH1 = -50000/256;TL1 = -50000%256;if (t1count20)t1count+;else

24、/ 计时到1sTR1 = 0;/ 关闭计数器1t1count = 0;green = 1;/ 绿灯不亮red = 1;/ 红灯不亮showflag = 1;/ 打开数码管显示digbit = 0x01;/ 从数码管第1位开始动态显示for (k=0;k6;k+)/ 显示888888wordbufk = 8;/* 根据共阴极字型编码表获取09，AB字型代码 */uchar getcode(uchar i)uchar p;switch (i)case 0: p=0x3f;break;/* 0 */case 1: p=0x06;break;/* 1 */case 2: p=0x5B;break;/*

25、 2 */case 3: p=0x4F;break;/* 3 */case 4: p=0x66;break;/* 4 */case 5: p=0x6D;break;/* 5 */case 6: p=0x7D;break;/* 6 */case 7: p=0x07;break;/* 7 */case 8: p=0x7F;break;/* 8 */case 9: p=0x67;break;/* 9 */case 10: p=0x77;break;/* A */case 11: p=0x7C;break;/* B */case 12: p=0x39;break;/* C */case 13: p=0

26、x5E;break;/* D */case 14: p=0x79;break;/* E */case 15: p=0x71;break;/* F */default: break;return(p);/* 显示函数 */void display(void)uchar i;switch (digbit)case 1:i=0;break;case 2:i=1;break;case 4:i=2;break;case 8:i=3;break;case 16:i=4;break;case 32:i=5;break;default: break;P2 = 0x0;/ 关闭显示P0 = getcode(wo

27、rdbufi);/ 送字型码P2 = digbit;/ 送字位码if (digbit0x20)/ 共6位digbit = digbit*2;/ 左移一位else digbit = 0x01;/* 密码比较函数 */bit pwcmp(void)bit flag;uchar i;for (i=0;i6;i+)if (pwi=pwbufi)flag = 1;elseflag = 0;i = 6;return(flag);/* 主程序 */void main()uchar j,key;P2 = 0x0;/ 关闭数码管显示TMOD = 0x11;/ T0，T1工作方式1/* 2ms 定时设置 */TH

28、0 = -2000/256;TL0 = 2000%256;/* 50ms 定时设置 */TH1 = -50000/256;TL1 = -50000%256;/* 启动计数器0，关闭计数器1 */TR0 = 1;ET0 = 1;TR1 = 0;ET1 = 1;EA = 1;count = 0;/ 初始没有输入密码，计数器设为0enterflag = 0;/ 没有按下确认键pwflag = 0;/ 密码标志先置为0 green = 1;/ 绿灯不亮red = 1;/ 红灯不亮/* 假设内定密码为937602 */pw0 = 9;pw1 = 3;pw2 = 7;pw3 = 6;pw4 = 0;pw5

29、 = 2;digbit = 0x01;/ 从第一位数码管开始动态扫描/* 刚加电时，显示888888 */for (j=0;j6;j+)wordbufj = 8;showflag = 1;/ 打开数码管显示 while(1) key = keyscan();/ 调用键盘扫描函数switch(key) case 0x11:/ 1行1列，数字0if (count6)wordbufcount = 0x0f;/ 对应密码位上显示“F”pwbufcount = 0;count+;break;case 0x21:/ 1行2列，数字1if (count6)wordbufcount = 0x0f;/ 对应密码

30、位上显示“Fpwbufcount = 1;count+;break;case 0x41:/ 1行3列，数字2if (count6)wordbufcount = 0x0f;/ 对应密码位上显示“Fpwbufcount = 2;count+;break; case 0x81:/ 1行4列，数字3if (count6)wordbufcount = 0x0f;/ 对应密码位上显示“Fpwbufcount = 3;count+;break;case 0x12:/ 2行1列，数字4if (count6)wordbufcount = 0x0f;/ 对应密码位上显示“Fpwbufcount = 4;count

31、+;break;case 0x22:/ 2行2列，数字5if (count6)wordbufcount = 0x0f;/ 对应密码位上显示“Fpwbufcount = 5;count+;break;case 0x42:/ 2行3列，数字6if (count6)wordbufcount = 0x0f;/ 对应密码位上显示“Fpwbufcount = 6;count+;break;case 0x82:/ 2行4列，数字7if (count6)wordbufcount = 0x0f;/ 对应密码位上显示“Fpwbufcount = 7;count+;break;case 0x14:/ 3行1列，数字

32、8if (count6)wordbufcount = 0x0f;/ 对应密码位上显示“Fpwbufcount = 8;count+;break;case 0x24:/ 3行2列，数字9if (count6)wordbufcount = 0x0f;/ 对应密码位上显示“Fpwbufcount = 9;count+;break;case 0x44:/ 3行3列，确认键enterflag = 1;/ 确认键按下if (count=6) / 只有输入6个密码后按确认键才作密码比较pwflag = pwcmp();elsepwflag = 0;/ 否则直接pmflag赋0break;case 0x84:

33、/ 3行4列，取消键count = 0;/ 密码计数清零for (j=0;j6;j+)wordbufj = 8;/ 数码管显示888888pwbufj = 0x0f;/ 用FFFFFF清除已经输入的密码break;default:break;if (enterflag=1)/ 如果按下确认键enterflag = 0; / 标志位置回0count = 0;/ 密码位计数器清零for (j=0;j6;j+)pwbufj = 0x0f;/ 用FFFFFF清除已经输入的密码showflag = 0;/ 关闭数码管显示TR1 = 1;/ 计数器1开始计数t1count = 0;/ 定时器1由50ms累

34、积到1s所用的计数器if (pwflag=1)green = 0; / 绿灯亮elsered = 0; / 红灯亮 /*/* Copyright (c) 2005, 通信工程学院 */* All rights reserved. */* 作 者：戴 佳 */*/#ifndef_PWLOCK_H / 防止PWLock.h被重复引用#define_PWLOCK_H#include #include #include #include #define uchar unsigned char#define uint unsigned intuchar digbit;/ 字位uchar wordbuf6

35、;/ 字型码缓冲区uchar t1count;/ 定时器1由50ms累积到1s所用的计数器uchar count;/ 密码位计数uchar pw6;/ 初始密码存储区uchar pwbuf6;/ 输入密码存储区bit enterflag;/ 确认键按下与否标志bit pwflag;/ 密码正确与否标志bit showflag;/ 数码管显示与否标志sbit green=P30;sbit red=P31;void display(void);/ 显示函数#endif/*/* Copyright (c) 2005, 通信工程学院 */* All rights reserved. */* 作 者：戴

36、 佳 */*/#include MusInstru.h/* 键消抖延时函数 */void delay(void)uchar i;for (i=300;i0;i-);/* 键扫描函数 */uchar getkey(void)uchar scancode,tmpcode;if (P1&0xf0)=0xf0)return(0);scancode = 0xfe;while(scancode&0x10)!=0)/ 逐行扫描P1 = scancode;/ 输出行扫描码if (P1&0xf0)!=0xf0)/ 本行有键按下tmpcode = (P1&0xf0)|0x0f;/* 返回特征字节码，为1的位即对应

37、于行和列 */return(scancode)+(tmpcode);else scancode = (scancode1)|0x01;/ 行扫描码左移一位/* 定时器0中断服务子程序 */void time0_int(void) interrupt 1 using 0/* 设置计数初值 */ TH0 = STH0; TL0 = STL0; P20=P20; / 反相，产生输出脉冲/* 主程序 */void main()uchar key,k;TMOD = 0x01;/ T0，工作方式1ET0 = 1;EA = 1; while(1) P1 = 0xf0; / 发全0行扫描码if (P1&0xf

38、0)!=0xf0)/ 若有键按下delay();/ 延时去抖动if (P1&0xf0)!=0xf0)/ 延时后再判断一次，去除抖动影响key = getkey();/ 调用键盘扫描函数/ 根据获取的按键位置得到k值switch(key) case 0x11:/ 1行1列k = 0;break;case 0x21:/ 1行2列k = 1;break;case 0x41:/ 1行3列k = 2;break; case 0x81:/ 1行4列k = 3;break;case 0x12:/ 2行1列k = 4;break;case 0x22:/ 2行2列k = 5;break;case 0x42:/ 2行3列k = 6;break;case 0x82:/ 2行4列k = 7;break;case 0x14:/ 3行1列k = 8;break;c