各位CSDN的uu们好呀,今天,小雅兰的内容是51单片机中的定时器以及按键控制LED流水灯模式&定时器时钟,下面,让我们进入51单片机的世界吧!!!
定时器
按键控制LED流水灯模式
定时器时钟
源代码
定时器
按键控制LED流水灯模式
0~65535 每隔1微秒计数加一 总共定时时间65535微秒
64535离计数器溢出差值1000,所以计时时间为1ms
Delay.c的内容:
void Delay(unsigned int xms) {unsigned char i, j;while(xms--){i = 2;j = 239;do{while (--j);} while (--i);} }
Key.c的内容:
#include <REGX52.H> #include "Delay.h"/*** @brief 获取独立按键键码* @param 无* @retval 按下按键的键码,范围:0~4,无按键按下时返回值为0*/ unsigned char Key() {unsigned char KeyNumber=0;if(P3_1==0){Delay(20);while(P3_1==0);Delay(20);KeyNumber=1;}if(P3_0==0){Delay(20);while(P3_0==0);Delay(20);KeyNumber=2;}if(P3_2==0){Delay(20);while(P3_2==0);Delay(20);KeyNumber=3;}if(P3_3==0){Delay(20);while(P3_3==0);Delay(20);KeyNumber=4;}return KeyNumber; }
Timer0.c的内容:
#include <REGX52.H>/*** @brief 定时器0初始化,1毫秒@12.000MHz* @param 无* @retval 无*/ void Timer0Init(void) {TMOD &= 0xF0; //设置定时器模式TMOD |= 0x01; //设置定时器模式TL0 = 0x18; //设置定时初值TH0 = 0xFC; //设置定时初值TF0 = 0; //清除TF0标志TR0 = 1; //定时器0开始计时ET0=1;EA=1;PT0=0; }
Delay.h的内容:
#ifndef __DELAY_H__ #define __DELAY_H__void Delay(unsigned int xms);#endif
Key.h的内容:
#ifndef __KEY_H__ #define __KEY_H__unsigned char Key();#endif
Timer0.h的内容:
#ifndef __TIMER0_H__ #define __TIMER0_H__void Timer0Init(void);#endif
main.c的内容:
#include <REGX52.H>#include "Timer0.h" #include "Key.h" #include <INTRINS.H>unsigned char KeyNum,LEDMode;void main() {P2=0xFE;Timer0Init();while(1){KeyNum=Key(); //获取独立按键键码if(KeyNum) //如果按键按下{if(KeyNum==1) //如果K1按键按下{LEDMode++; //模式切换if(LEDMode>=2)LEDMode=0;}}} }void Timer0_Routine() interrupt 1 {static unsigned int T0Count;TL0 = 0x18; //设置定时初值TH0 = 0xFC; //设置定时初值T0Count++; //T0Count计次,对中断频率进行分频if(T0Count>=500)//分频500次,500ms{T0Count=0;if(LEDMode==0) //模式判断P2=_crol_(P2,1); //LED输出if(LEDMode==1)P2=_cror_(P2,1);} }
定时器时钟
Delay.c的内容:
void Delay(unsigned int xms) {unsigned char i, j;while(xms--){i = 2;j = 239;do{while (--j);} while (--i);} }
Delay.h的内容:
#ifndef __DELAY_H__ #define __DELAY_H__void Delay(unsigned int xms);#endif
LCD1602.c的内容:
#include <REGX52.H>//引脚配置: sbit LCD_RS=P2^6; sbit LCD_RW=P2^5; sbit LCD_EN=P2^7; #define LCD_DataPort P0//函数定义: /*** @brief LCD1602延时函数,12MHz调用可延时1ms* @param 无* @retval 无*/ void LCD_Delay() {unsigned char i, j;i = 2;j = 239;do{while (--j);} while (--i); }/*** @brief LCD1602写命令* @param Command 要写入的命令* @retval 无*/ void LCD_WriteCommand(unsigned char Command) {LCD_RS=0;LCD_RW=0;LCD_DataPort=Command;LCD_EN=1;LCD_Delay();LCD_EN=0;LCD_Delay(); }/*** @brief LCD1602写数据* @param Data 要写入的数据* @retval 无*/ void LCD_WriteData(unsigned char Data) {LCD_RS=1;LCD_RW=0;LCD_DataPort=Data;LCD_EN=1;LCD_Delay();LCD_EN=0;LCD_Delay(); }/*** @brief LCD1602设置光标位置* @param Line 行位置,范围:1~2* @param Column 列位置,范围:1~16* @retval 无*/ void LCD_SetCursor(unsigned char Line,unsigned char Column) {if(Line==1){LCD_WriteCommand(0x80|(Column-1));}else if(Line==2){LCD_WriteCommand(0x80|(Column-1+0x40));} }/*** @brief LCD1602初始化函数* @param 无* @retval 无*/ void LCD_Init() {LCD_WriteCommand(0x38);//八位数据接口,两行显示,5*7点阵LCD_WriteCommand(0x0c);//显示开,光标关,闪烁关LCD_WriteCommand(0x06);//数据读写操作后,光标自动加一,画面不动LCD_WriteCommand(0x01);//光标复位,清屏 }/*** @brief 在LCD1602指定位置上显示一个字符* @param Line 行位置,范围:1~2* @param Column 列位置,范围:1~16* @param Char 要显示的字符* @retval 无*/ void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char) {LCD_SetCursor(Line,Column);LCD_WriteData(Char); }/*** @brief 在LCD1602指定位置开始显示所给字符串* @param Line 起始行位置,范围:1~2* @param Column 起始列位置,范围:1~16* @param String 要显示的字符串* @retval 无*/ void LCD_ShowString(unsigned char Line,unsigned char Column,char *String) {unsigned char i;LCD_SetCursor(Line,Column);for(i=0;String[i]!='\0';i++){LCD_WriteData(String[i]);} }/*** @brief 返回值=X的Y次方*/ int LCD_Pow(int X,int Y) {unsigned char i;int Result=1;for(i=0;i<Y;i++){Result*=X;}return Result; }/*** @brief 在LCD1602指定位置开始显示所给数字* @param Line 起始行位置,范围:1~2* @param Column 起始列位置,范围:1~16* @param Number 要显示的数字,范围:0~65535* @param Length 要显示数字的长度,范围:1~5* @retval 无*/ void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length) {unsigned char i;LCD_SetCursor(Line,Column);for(i=Length;i>0;i--){LCD_WriteData(Number/LCD_Pow(10,i-1)%10+'0');} }/*** @brief 在LCD1602指定位置开始以有符号十进制显示所给数字* @param Line 起始行位置,范围:1~2* @param Column 起始列位置,范围:1~16* @param Number 要显示的数字,范围:-32768~32767* @param Length 要显示数字的长度,范围:1~5* @retval 无*/ void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length) {unsigned char i;unsigned int Number1;LCD_SetCursor(Line,Column);if(Number>=0){LCD_WriteData('+');Number1=Number;}else{LCD_WriteData('-');Number1=-Number;}for(i=Length;i>0;i--){LCD_WriteData(Number1/LCD_Pow(10,i-1)%10+'0');} }/*** @brief 在LCD1602指定位置开始以十六进制显示所给数字* @param Line 起始行位置,范围:1~2* @param Column 起始列位置,范围:1~16* @param Number 要显示的数字,范围:0~0xFFFF* @param Length 要显示数字的长度,范围:1~4* @retval 无*/ void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length) {unsigned char i,SingleNumber;LCD_SetCursor(Line,Column);for(i=Length;i>0;i--){SingleNumber=Number/LCD_Pow(16,i-1)%16;if(SingleNumber<10){LCD_WriteData(SingleNumber+'0');}else{LCD_WriteData(SingleNumber-10+'A');}} }/*** @brief 在LCD1602指定位置开始以二进制显示所给数字* @param Line 起始行位置,范围:1~2* @param Column 起始列位置,范围:1~16* @param Number 要显示的数字,范围:0~1111 1111 1111 1111* @param Length 要显示数字的长度,范围:1~16* @retval 无*/ void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length) {unsigned char i;LCD_SetCursor(Line,Column);for(i=Length;i>0;i--){LCD_WriteData(Number/LCD_Pow(2,i-1)%2+'0');} }
LCD1602.h的内容:
#ifndef __LCD1602_H__ #define __LCD1602_H__//用户调用函数: void LCD_Init(); void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char); void LCD_ShowString(unsigned char Line,unsigned char Column,char *String); void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length); void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length); void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length); void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);#endif
Timer0.c的内容:
#include <REGX52.H>/*** @brief 定时器0初始化,1毫秒@12.000MHz* @param 无* @retval 无*/ void Timer0Init(void) {TMOD &= 0xF0; //设置定时器模式TMOD |= 0x01; //设置定时器模式TL0 = 0x18; //设置定时初值TH0 = 0xFC; //设置定时初值TF0 = 0; //清除TF0标志TR0 = 1; //定时器0开始计时ET0=1;EA=1;PT0=0; }
Timer0.h的内容:
#ifndef __TIMER0_H__ #define __TIMER0_H__void Timer0Init(void);#endif
main.c的内容:
#include <REGX52.H> #include "Delay.h" #include "LCD1602.h" #include "Timer0.h"unsigned char Sec=55,Min=59,Hour=23;void main() {LCD_Init();Timer0Init();LCD_ShowString(1,1,"Clock:"); //上电显示静态字符串LCD_ShowString(2,1," : :");while(1){LCD_ShowNum(2,1,Hour,2); //显示时分秒LCD_ShowNum(2,4,Min,2);LCD_ShowNum(2,7,Sec,2);} }void Timer0_Routine() interrupt 1 {static unsigned int T0Count;TL0 = 0x18; //设置定时初值TH0 = 0xFC; //设置定时初值T0Count++;if(T0Count>=1000) //定时器分频,1s{T0Count=0;Sec++; //1秒到,Sec自增if(Sec>=60){Sec=0; //60秒到,Sec清0,Min自增Min++;if(Min>=60){Min=0; //60分钟到,Min清0,Hour自增Hour++;if(Hour>=24){Hour=0; //24小时到,Hour清0}}}} }
源代码
定时器时钟
main.c的内容:
#include <REGX52.H>
#include "Delay.h"
#include "LCD1602.h"
#include "Timer0.h"unsigned char Sec=55,Min=59,Hour=23;
void main()
{
LCD_Init();
Timer0Init();
LCD_ShowString(1,1,"Clock:"); //上电显示静态字符串
LCD_ShowString(2,1," : :");
while(1)
{
LCD_ShowNum(2,1,Hour,2); //显示时分秒
LCD_ShowNum(2,4,Min,2);
LCD_ShowNum(2,7,Sec,2);
}
}void Timer0_Routine() interrupt 1
{
static unsigned int T0Count;
TL0 = 0x18; //设置定时初值
TH0 = 0xFC; //设置定时初值
T0Count++;
if(T0Count>=1000) //定时器分频,1s
{
T0Count=0;
Sec++; //1秒到,Sec自增
if(Sec>=60)
{
Sec=0; //60秒到,Sec清0,Min自增
Min++;
if(Min>=60)
{
Min=0; //60分钟到,Min清0,Hour自增
Hour++;
if(Hour>=24)
{
Hour=0; //24小时到,Hour清0
}
}
}
}
}
Delay.c的内容:
void Delay(unsigned int xms)
{
unsigned char i, j;
while(xms--)
{
i = 2;
j = 239;
do
{
while (--j);
} while (--i);
}
}
Timer0.c的内容:
#include <REGX52.H>
/**
* @brief 定时器0初始化,1毫秒@12.000MHz
* @param 无
* @retval 无
*/
void Timer0Init(void)
{
TMOD &= 0xF0; //设置定时器模式
TMOD |= 0x01; //设置定时器模式
TL0 = 0x18; //设置定时初值
TH0 = 0xFC; //设置定时初值
TF0 = 0; //清除TF0标志
TR0 = 1; //定时器0开始计时
ET0=1;
EA=1;
PT0=0;
}
LCD1602.c的内容:
#include <REGX52.H>
//引脚配置:
sbit LCD_RS=P2^6;
sbit LCD_RW=P2^5;
sbit LCD_EN=P2^7;
#define LCD_DataPort P0//函数定义:
/**
* @brief LCD1602延时函数,12MHz调用可延时1ms
* @param 无
* @retval 无
*/
void LCD_Delay()
{
unsigned char i, j;i = 2;
j = 239;
do
{
while (--j);
} while (--i);
}/**
* @brief LCD1602写命令
* @param Command 要写入的命令
* @retval 无
*/
void LCD_WriteCommand(unsigned char Command)
{
LCD_RS=0;
LCD_RW=0;
LCD_DataPort=Command;
LCD_EN=1;
LCD_Delay();
LCD_EN=0;
LCD_Delay();
}/**
* @brief LCD1602写数据
* @param Data 要写入的数据
* @retval 无
*/
void LCD_WriteData(unsigned char Data)
{
LCD_RS=1;
LCD_RW=0;
LCD_DataPort=Data;
LCD_EN=1;
LCD_Delay();
LCD_EN=0;
LCD_Delay();
}/**
* @brief LCD1602设置光标位置
* @param Line 行位置,范围:1~2
* @param Column 列位置,范围:1~16
* @retval 无
*/
void LCD_SetCursor(unsigned char Line,unsigned char Column)
{
if(Line==1)
{
LCD_WriteCommand(0x80|(Column-1));
}
else if(Line==2)
{
LCD_WriteCommand(0x80|(Column-1+0x40));
}
}/**
* @brief LCD1602初始化函数
* @param 无
* @retval 无
*/
void LCD_Init()
{
LCD_WriteCommand(0x38);//八位数据接口,两行显示,5*7点阵
LCD_WriteCommand(0x0c);//显示开,光标关,闪烁关
LCD_WriteCommand(0x06);//数据读写操作后,光标自动加一,画面不动
LCD_WriteCommand(0x01);//光标复位,清屏
}/**
* @brief 在LCD1602指定位置上显示一个字符
* @param Line 行位置,范围:1~2
* @param Column 列位置,范围:1~16
* @param Char 要显示的字符
* @retval 无
*/
void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char)
{
LCD_SetCursor(Line,Column);
LCD_WriteData(Char);
}/**
* @brief 在LCD1602指定位置开始显示所给字符串
* @param Line 起始行位置,范围:1~2
* @param Column 起始列位置,范围:1~16
* @param String 要显示的字符串
* @retval 无
*/
void LCD_ShowString(unsigned char Line,unsigned char Column,char *String)
{
unsigned char i;
LCD_SetCursor(Line,Column);
for(i=0;String[i]!='\0';i++)
{
LCD_WriteData(String[i]);
}
}/**
* @brief 返回值=X的Y次方
*/
int LCD_Pow(int X,int Y)
{
unsigned char i;
int Result=1;
for(i=0;i<Y;i++)
{
Result*=X;
}
return Result;
}/**
* @brief 在LCD1602指定位置开始显示所给数字
* @param Line 起始行位置,范围:1~2
* @param Column 起始列位置,范围:1~16
* @param Number 要显示的数字,范围:0~65535
* @param Length 要显示数字的长度,范围:1~5
* @retval 无
*/
void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
unsigned char i;
LCD_SetCursor(Line,Column);
for(i=Length;i>0;i--)
{
LCD_WriteData(Number/LCD_Pow(10,i-1)%10+'0');
}
}/**
* @brief 在LCD1602指定位置开始以有符号十进制显示所给数字
* @param Line 起始行位置,范围:1~2
* @param Column 起始列位置,范围:1~16
* @param Number 要显示的数字,范围:-32768~32767
* @param Length 要显示数字的长度,范围:1~5
* @retval 无
*/
void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length)
{
unsigned char i;
unsigned int Number1;
LCD_SetCursor(Line,Column);
if(Number>=0)
{
LCD_WriteData('+');
Number1=Number;
}
else
{
LCD_WriteData('-');
Number1=-Number;
}
for(i=Length;i>0;i--)
{
LCD_WriteData(Number1/LCD_Pow(10,i-1)%10+'0');
}
}/**
* @brief 在LCD1602指定位置开始以十六进制显示所给数字
* @param Line 起始行位置,范围:1~2
* @param Column 起始列位置,范围:1~16
* @param Number 要显示的数字,范围:0~0xFFFF
* @param Length 要显示数字的长度,范围:1~4
* @retval 无
*/
void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
unsigned char i,SingleNumber;
LCD_SetCursor(Line,Column);
for(i=Length;i>0;i--)
{
SingleNumber=Number/LCD_Pow(16,i-1)%16;
if(SingleNumber<10)
{
LCD_WriteData(SingleNumber+'0');
}
else
{
LCD_WriteData(SingleNumber-10+'A');
}
}
}/**
* @brief 在LCD1602指定位置开始以二进制显示所给数字
* @param Line 起始行位置,范围:1~2
* @param Column 起始列位置,范围:1~16
* @param Number 要显示的数字,范围:0~1111 1111 1111 1111
* @param Length 要显示数字的长度,范围:1~16
* @retval 无
*/
void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
unsigned char i;
LCD_SetCursor(Line,Column);
for(i=Length;i>0;i--)
{
LCD_WriteData(Number/LCD_Pow(2,i-1)%2+'0');
}
}
LCD1602.h的内容:
#ifndef __LCD1602_H__
#define __LCD1602_H__//用户调用函数:
void LCD_Init();
void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char);
void LCD_ShowString(unsigned char Line,unsigned char Column,char *String);
void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);
void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length);
void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);
void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);#endif
Delay.h的内容:
#ifndef __DELAY_H__
#define __DELAY_H__void Delay(unsigned int xms);
#endif
Timer0.h的内容:
#ifndef __TIMER0_H__
#define __TIMER0_H__void Timer0Init(void);
#endif
好啦,小雅兰今天的内容就到这里啦,还要继续加油呀!!!