Hello fellow CSDN users, today, the content of Xiaoyalan is the timer in the 51 microcontroller and the button control of the LED running light mode & timer clock. Now, let us enter the world of the 51 microcontroller! ! !
timer
Button control LED running light mode
timer clock
source code
timer
Button control LED running light mode
0~65535 The count increases by one every 1 microsecond. The total timing time is 65535 microseconds.
The difference between 64535 and counter overflow is 1000, so the timing time is 1ms.
Contents of Delay.c:
void Delay(unsigned int xms) { unsigned char i, j; while(xms--) { i = 2; j = 239; do { while (--j); } while (--i); } }Contents of Key.c:
#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; }Contents of Timer0.c:
#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; }Contents of Delay.h:
#ifndef __DELAY_H__ #define __DELAY_H__ void Delay(unsigned int xms); #endifContents of Key.h:
#ifndef __KEY_H__ #define __KEY_H__ unsigned char Key(); #endifContents of Timer0.h:
#ifndef __TIMER0_H__ #define __TIMER0_H__ void Timer0Init(void); #endifContents of main.c:
#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); } }
timer clock
Contents of Delay.c:
void Delay(unsigned int xms) { unsigned char i, j; while(xms--) { i = 2; j = 239; do { while (--j); } while (--i); } }Contents of Delay.h:
#ifndef __DELAY_H__ #define __DELAY_H__ void Delay(unsigned int xms); #endifContents of LCD1602.c:
#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'); } }Contents of LCD1602.h:
#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); #endifContents of Timer0.c:
#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; }Contents of Timer0.h:
#ifndef __TIMER0_H__ #define __TIMER0_H__ void Timer0Init(void); #endifContents of main.c:
#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 } } } } }
source code
timer clock
Contents of main.c:
#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:"); //Display static string when power on LCD_ShowString(2,1," : :"); while(1) { LCD_ShowNum(2,1,Hour,2); //Display hours, minutes and seconds LCD_ShowNum(2,4,Min,2); LCD_ShowNum(2,7,Sec,2); } }
void Timer0_Routine() interrupt 1
{ static unsigned int T0Count; TL0 = 0x18; //Set the initial timing value TH0 = 0xFC; //Set the initial timing value T0Count++; if(T0Count>=1000) //Timer frequency division, 1s { T0Count=0; Sec++; //When 1 second comes, Sec will increase automatically if(Sec>=60) { Sec=0; //When 60 seconds arrive, Sec will clear to 0, and Min will increase automatically Min++; if(Min>=60) { Min=0; //60 minutes is up, Min is cleared to 0, Hour is incremented by Hour++; if(Hour>=24) { Hour=0; //24 hours is up, Hour is cleared to 0
}
}
}
}
}
Contents of Delay.c:
void Delay(unsigned int xms)
{
unsigned char i, j;
while(xms--)
{
i = 2;
j = 239;
do
{
while (--j);
} while (--i);
}
}
Contents of Timer0.c:
#include <REGX52.H>
/**
* @brief Timer 0 initialization, 1 millisecond @12.000MHz
* @param None
* @retval None
*/
void Timer0Init(void)
{ TMOD &= 0xF0; //Set the timer mode TMOD |= 0x01; // Set the timer mode TL0 = 0x18; //Set the initial value of the timer TH0 = 0xFC; //Set the initial value of the timer TF0 = 0; //Clear the TF0 flag TR0 = 1; //Start timer 0 ET0=1; EA= 1; PT0=0; }
Contents of LCD1602.c:
#include <REGX52.H>
//Pin configuration:
sbit LCD_RS=P2^6;
sbit LCD_RW=P2^5;
sbit LCD_EN=P2^7;
#define LCD_DataPort P0//Function definition:
/**
* @brief LCD1602 delay function, 12MHz call can delay 1ms
* @param None
* @retval None
*/
void LCD_Delay()
{ unsigned char i, j;i = 2;
j = 239;
do
{
while (--j);
} while (--i);
}/**
* @brief LCD1602 write command
* @param Command Command to be written
* @retval None
*/
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 write data
* @param Data Data to be written
* @retval None
*/
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 sets the cursor position
* @param Line line position, range: 1~2
* @param Column column position, range: 1~16
* @retval None
*/
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 initialization function
* @param None
* @retval None
*/
void LCD_Init()
{ LCD_WriteCommand(0x38);//Eight-bit data interface, two lines of display, 5*7 dot matrix LCD_WriteCommand(0x0c); //Display on, cursor off, flashing off LCD_WriteCommand(0x06);//After data reading and writing operations, the cursor automatically increases by one, and the screen does not move LCD_WriteCommand(0x01);//The cursor is reset, clear the screen }/**
* @brief Display a character at the specified position of LCD1602
* @param Line row position, range: 1~2
* @param Column column position, range: 1~16
* @param Char Character to be displayed
* @retval None
*/
void LCD_ShowChar(unsigned char Line, unsigned char Column, char Char)
{ LCD_SetCursor(Line,Column); LCD_WriteData(Char); }/**
* @brief Start displaying the given string at the specified position on LCD1602
* @param Line starting line position, range: 1~2
* @param Column starting column position, range: 1~16
* @param String to display String
* @retval None
*/
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 return
value=X to the power of Y * / int
LCD_Pow
(
int =X; } return Result; }
/**
* @brief Start displaying the given number at the specified position on LCD1602
* @param Line starting line position, range: 1~2
* @param Column starting column position, range: 1~16
* @param Number to be displayed Number, range: 0~65535
* @param Length The length of the number to be displayed, range: 1~5
* @retval None
*/
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 Display the given number in signed decimal starting from the specified position on LCD1602
* @param Line starting line position, range: 1~2
* @param Column starting column position, range: 1~16
* @param Number The number to be displayed, range: -32768~32767
* @param Length The length of the number to be displayed, range: 1~5
* @retval None
*/
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 Display the given number in hexadecimal starting from the specified position of LCD1602
* @param Line starting line position, range: 1~2
* @param Column starting column position, range: 1~16
* @ param Number The number to be displayed, range: 0~0xFFFF
* @param Length The length of the number to be displayed, range: 1~4
* @retval None
*/
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 Display the given number in binary starting from the specified position on LCD1602
* @param Line starting line position, range: 1~2
* @param Column starting column position, range: 1~16
* @param Number to be Displayed number, range: 0~1111 1111 1111 1111
* @param Length The length of the number to be displayed, range: 1~16
* @retval None
*/
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'); } }
Contents of LCD1602.h:
#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
Contents of Delay.h:
#ifndef __DELAY_H__
#define __DELAY_H__void Delay(unsigned int xms);
#endif
Contents of Timer0.h:
#ifndef __TIMER0_H__
#define __TIMER0_H__void Timer0Init(void);
#endif
Okay, that’s all Xiao Yalan’s content for today, keep up the good work! ! !
