51单片机-AT24C02-实验2-秒表实验（可参考上一节）

利用定时器去对按键和数码管进行扫描(Whappy)

main.c

#include <REGX52.H>
#include "LCD1602.h"
#include "AT24C02.h"
#include "Delay.h"
#include "Timer0.h"
#include "Nixie.h"
#include "Key.h"unsigned char KeyNum;
unsigned char Min,Sec,MiniSec;
unsigned char RunFlag;void main()
{Timer0_Init(); //初始化定时器while(1){KeyNum = Key();if(KeyNum == 1){RunFlag = !RunFlag;}Nixie_SetBuf(1,Min/10);Nixie_SetBuf(2,Min%10);Nixie_SetBuf(3,11);Nixie_SetBuf(4,Sec/10);Nixie_SetBuf(5,Sec%10);Nixie_SetBuf(6,11);Nixie_SetBuf(7,MiniSec/10);Nixie_SetBuf(8,MiniSec%10);}Delay(1000);
}void Sec_Loop(void)
{if(RunFlag){MiniSec++;if(MiniSec >= 100){MiniSec = 0;Sec++;if(Sec >= 60){Sec = 0;Min++;if(Min >= 60){Min = 0;}}}}}void Timer0_Rountine(void)  interrupt 1
{static unsigned int T0Count1,T0Count2,T0Count3;  //Timer0_Rountine(void) 函数结束之后T0Count保留其原来的值TL0 = 0x66;		//设置定时初值TH0 = 0xFC;		//设置定时初值T0Count1++;if(T0Count1 >= 20){T0Count1 = 0;Key_Loop();}T0Count2++;if(T0Count2 >= 2){T0Count2 = 0;Nixie_Loop();}	T0Count3++;if(T0Count3 >= 10){T0Count3 = 0;Sec_Loop();}	
}

#include <REGX52.H>
#include "Timer0.h"
#include "Key.h"
#include "Nixie.h"
#include "Delay.h"
#include "AT24C02.h"unsigned char KeyNum;
unsigned char Min,Sec,MiniSec;
unsigned char RunFlag;void main()
{Timer0_Init();while(1){KeyNum=Key();if(KeyNum==1)			//K1按键按下{RunFlag=!RunFlag;	//启动标志位翻转}if(KeyNum==2)			//K2按键按下{Min=0;				//分秒清0Sec=0;MiniSec=0;}if(KeyNum==3)			//K3按键按下{AT24C02_WriteByte(0,Min);	//将分秒写入AT24C02Delay(5);AT24C02_WriteByte(1,Sec);Delay(5);AT24C02_WriteByte(2,MiniSec);Delay(5);}if(KeyNum==4)			//K4按键按下{Min=AT24C02_ReadByte(0);	//读出AT24C02数据Sec=AT24C02_ReadByte(1);MiniSec=AT24C02_ReadByte(2);}Nixie_SetBuf(1,Min/10);	//设置显示缓存，显示数据Nixie_SetBuf(2,Min%10);Nixie_SetBuf(3,11);Nixie_SetBuf(4,Sec/10);Nixie_SetBuf(5,Sec%10);Nixie_SetBuf(6,11);Nixie_SetBuf(7,MiniSec/10);Nixie_SetBuf(8,MiniSec%10);}
}/*** @brief  秒表驱动函数，在中断中调用* @param  无* @retval 无*/
void Sec_Loop(void)
{if(RunFlag){MiniSec++;if(MiniSec>=100){MiniSec=0;Sec++;if(Sec>=60){Sec=0;Min++;if(Min>=60){Min=0;}}}}
}void Timer0_Routine() interrupt 1
{static unsigned int T0Count1,T0Count2,T0Count3;TL0 = 0x18;		//设置定时初值TH0 = 0xFC;		//设置定时初值T0Count1++;if(T0Count1>=20){T0Count1=0;Key_Loop();	//20ms调用一次按键驱动函数}T0Count2++;if(T0Count2>=2){T0Count2=0;Nixie_Loop();//2ms调用一次数码管驱动函数}T0Count3++;if(T0Count3>=10){T0Count3=0;Sec_Loop();	//10ms调用一次数秒表驱动函数}
}

AT24C02.c

#include <REGX52.H>
#include "IIC.h"#define AT24C02_ADDRESS 0XA0 //1010 0000 前四位AT24C02地址不变,最后一位决定是写还是读 1:读,即接收 0:写,即发送//仿照帧格式去写(可参考上一节IIC时序介绍)
//字节写：在WORD ADDRESS处写入数据DATA
void AT24C02_WriteByte(unsigned char WordAddress,Data)
{IIC_Start();  //起始信号IIC_SendByte(AT24C02_ADDRESS); //发送从机地址和写操作IIC_ReceiveAck();  //接收应答位IIC_SendByte(WordAddress); //字地址:指定在WORD ADDRESS处写入数据DATAIIC_ReceiveAck();  //接收应答位IIC_SendByte(Data); //写入数据到WordAddress中IIC_ReceiveAck(); //接收应答位IIC_Stop();//结束信号}//Ack : 0:表示应答 1:表示非应答
//随机读：读出在WORD ADDRESS处的数据DATA
unsigned char AT24C02_ReadByte(unsigned char WordAddress)
{unsigned char Data;//写操作,就是先找到要通信的从机IIC_Start();  //起始信号IIC_SendByte(AT24C02_ADDRESS); //发送从机地址和写操作IIC_ReceiveAck();  //接收应答位IIC_SendByte(WordAddress); //字地址:指定在WORD ADDRESS处写入数据DATAIIC_ReceiveAck();  //接收应答位//找到对应的从机之后,开始接收从机发过来的数据IIC_Start();  //起始信号IIC_SendByte(AT24C02_ADDRESS | 0X01); //发送从机地址和读操作IIC_ReceiveAck();  //接收应答位Data = IIC_ReceiveByte();  //接收一个字节的数据IIC_SendAck(1); IIC_Stop();//结束信号return Data;
}

Nixie.c

#include <REGX52.H>
#include "Delay.h"unsigned char Nixie_Buf[9] = {0,10,10,10,10,10,10,10,10}; //显示缓存区unsigned char NixieTable[] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x00,0X40};void Nixie_SetBuf(unsigned char Location,Number)
{Nixie_Buf[Location] = Number;
}void Nixie_Scan(unsigned char Location,Number)
{P0 = 0X00;switch(Location) //位选{case 1: P2_4 = 1;P2_3 = 1; P2_2 = 1; break;case 2: P2_4 = 1;P2_3 = 1; P2_2 = 0; break;case 3: P2_4 = 1;P2_3 = 0; P2_2 = 1; break;case 4: P2_4 = 1;P2_3 = 0; P2_2 = 0; break;case 5: P2_4 = 0;P2_3 = 1; P2_2 = 1; break;case 6: P2_4 = 0;P2_3 = 1; P2_2 = 0; break;case 7: P2_4 = 0;P2_3 = 0; P2_2 = 1; break;case 8: P2_4 = 0;P2_3 = 0; P2_2 = 0; break;}P0 = NixieTable[Number]; //段选}void Nixie_Loop(void)
{static unsigned char i = 1;Nixie_Scan(i,Nixie_Buf[i]);i++;if(i >= 9) {i=1;}
}

#include <REGX52.H>
#include "Delay.h"//数码管显示缓存区
unsigned char Nixie_Buf[9]={0,10,10,10,10,10,10,10,10};//数码管段码表
unsigned char NixieTable[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x00,0x40};/*** @brief  设置显示缓存区* @param  Location 要设置的位置，范围：1~8* @param  Number 要设置的数字，范围：段码表索引范围* @retval 无*/
void Nixie_SetBuf(unsigned char Location,Number)
{Nixie_Buf[Location]=Number;
}/*** @brief  数码管扫描显示* @param  Location 要显示的位置，范围：1~8* @param  Number 要显示的数字，范围：段码表索引范围* @retval 无*/
void Nixie_Scan(unsigned char Location,Number)
{P0=0x00;				//段码清0，消影switch(Location)		//位码输出{case 1:P2_4=1;P2_3=1;P2_2=1;break;case 2:P2_4=1;P2_3=1;P2_2=0;break;case 3:P2_4=1;P2_3=0;P2_2=1;break;case 4:P2_4=1;P2_3=0;P2_2=0;break;case 5:P2_4=0;P2_3=1;P2_2=1;break;case 6:P2_4=0;P2_3=1;P2_2=0;break;case 7:P2_4=0;P2_3=0;P2_2=1;break;case 8:P2_4=0;P2_3=0;P2_2=0;break;}P0=NixieTable[Number];	//段码输出
}/*** @brief  数码管驱动函数，在中断中调用* @param  无* @retval 无*/
void Nixie_Loop(void)
{static unsigned char i=1;Nixie_Scan(i,Nixie_Buf[i]);i++;if(i>=9){i=1;}
}

Timer.c

#include <REGX52.H>//由软件配置的定时器STC-ISP/**
* @brief 定时器初始化（51单片机软件内置配置的定时器）* @param 无* @retval 无*/void Timer0_Init()		//1毫秒@11.0592MHz
{TMOD &= 0xF0;		//设置定时器模式TMOD |= 0x01;		//设置定时器模式TL0 = 0x66;		//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//打开定时器中断ET0  = 1; EA = 1;PT0 = 0;
}//void Timer0_Init()
//{
//	/*
//	采用与或式赋值法，可以把不可寻址的位进行寻址，改变其中几位而不影响其他位
//	TMOD = TMOD & 0XF0; //低四位清零，高四位置一
//	TMOD = TMOD | 0X01；//把TMOD的最低位置1，高四位保持不变
//	如上，改变低四位而不改变高四位
//	
//	*/
//	//TMOD = 0x01;  //工作模式寄存器
//	TMOD = TMOD & 0XF0; //低四位清零，高四位置一
//	TMOD = TMOD | 0X01；//把TMOD的最低位置1，高四位保持不变
//	//控制寄存器
//	TF0  = 0;
//	TR0 = 1;
//	
//	/*定时器赋初值  定时1ms，12Mhz的晶振，1us产生一个计数脉冲，
//	而16位的计数器是0~65535个可能，也就是65536us，65536个脉冲
//	如何差生一微秒（1ms=1000us）那么从64535开始记到65535产生一个中断
//	通过配置TL0和TH0控制处置也就是把64535变成16进制TL0是低八位两个十六进制，TH0是高八位的两十六进制*/
//	
//	TL0  = 64535%56;
//	TH0  = 64535/256;
//	
//	ET0  = 1; 
//	EA = 1;
//	PT0 = 0;
//	
//}/*定时器中断函数模板
void Timer0_Rountine(void)  interrupt 1
{static unsigned int T0Count ;  //Timer0_Rountine(void) 函数结束之后T0Count保留其原来的值TL0 = 0x66;		//设置定时初值TH0 = 0xFC;		//设置定时初值T0Count++;if(T0Count >= 1000){T0Count = 0;P2_0 = ~P2_0;}	
}
*/