74LS595 AT24C02实现断电记忆五位计数C语言程序

74LS595 AT24C02实现断电记忆五位计数C语言程序 ------------------------------------------------------------------------------------------------ 74LS595 AT24C02实现断电记忆五位计数C语言程序 //51芯片管脚定义头文件 #include<reg51.h> #include<intrins.h> #include<stdio.h> #include<stdlib.h> //内部包含延时函数 _nop_(); #define uchar unsigned char #define uint unsigned long int #define AT24C02_ADDR 0xa0 uchar code DSY_CODE[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff}; 数码管段码 uchar data Buffer_Counts[]={0,0,0,0,0,0,0,0,0,0}; sbit SCLK_595 =P2^0; //移位时钟脉冲 sbit SDATA_595=P2^1; //串行数据输入 sbit RCK_595 =P2^2; //输出锁存器控制脉冲 sbit SDA = P2^3; sbit SCL = P2^4; sbit OUT1=P2^5; sbit OUT2=P2^6; sbit k1=P3^1; —————————————————————————————————————— ------------------------------------------------------------------------------------------------ sbit k2=P3^2; uint Count_B,BW; uchar temp,GW,SW,DATA,DATA1,DATA2,DASW,DAGW,DABW,SD,BD,M; // 延时子程序 5us void delay_5us() //5us { _nop_(); } //1毫秒延时函数 void delay(uint z) { uint x,y; for(x = z; x > 0; x--) for(y = 114; y > 0 ; y--); } //将显示数据送入74HC595内部移位寄存器 void WR_595(void) { uchar j; for (j=0;j<8;j++) { —————————————————————————————————————— ------------------------------------------------------------------------------------------------ temp=temp<<1; SDATA_595=CY; // SCLK_595=1; //上升沿发生移位 _nop_(); _nop_(); SCLK_595=0; } } //将移位寄存器内的数据锁存到输出寄存器并显示 void OUT_595(void) { RCK_595=0; _nop_(); _nop_(); RCK_595=1; _nop_(); _nop_(); _nop_(); RCK_595=0; } //24C02子程序 void I2C_init() //I2C初始化 —————————————————————————————————————— ------------------------------------------------------------------------------------------------ { SDA = 1; _nop_(); SCL = 1; _nop_(); } void I2C_Start() //I2C起始信号 { SCL = 1; _nop_(); SDA = 1; delay_5us(); SDA = 0; delay_5us(); } void I2C_Stop() // I2C停止信號 { SDA = 0; _nop_(); SCL = 1; delay_5us(); SDA = 1; —————————————————————————————————————— ------------------------------------------------------------------------------------------------ delay_5us(); } //上升沿将数据送到输出锁存器 void Master_ACK(bit i) // 主机发送应答 { SCL = 0; // 拉低时钟总线允许SDA数据总线上的数据变化 _nop_(); // 让总线稳定 if (i) //如果i = 1 那么拉低数据总线 表示主机应答 { SDA = 0; } else { SDA = 1; //发送非应答 } _nop_();//让总线稳定 SCL = 1;//拉高时钟总线 让从机从SDA线上读走 主机的应答信 号 _nop_(); SCL = 0;//拉低时钟总线， 占用总线继续通信 _nop_(); SDA = 1;//释放SDA数据总线。 _nop_(); } —————————————————————————————————————— ------------------------------------------------------------------------------------------------ bit Test_ACK() // 从机应答 { SCL = 1;//时钟总线为高电平期间可以读取从机应答信号 delay_5us(); if (SDA) { SCL = 0; I2C_Stop(); return(0); } else { SCL = 0; return(1); } } void I2C_send_byte(uchar byte) //发送一个字节 { uchar i; for(i = 0 ; i < 8 ; i++) { SCL = 0; —————————————————————————————————————— ------------------------------------------------------------------------------------------------ _nop_(); if (byte & 0x80) // { SDA = 1; _nop_(); } else { SDA = 0; _nop_(); } SCL = 1; _nop_(); byte <<= 1; } SCL = 0; _nop_(); SDA = 1; _nop_(); } uchar I2C_read_byte() //读一个字节 { uchar i, dat; —————————————————————————————————————— ------------------------------------------------------------------------------------------------ SCL = 0 ; _nop_(); SDA = 1; _nop_(); for(i = 0 ; i < 8 ; i++) { SCL = 1; _nop_(); dat <<= 1; if (SDA) { dat |= 0x01; } _nop_(); SCL = 0; _nop_(); } return(dat); } bit I2C_WriteData(uchar ADDR,uchar DAT) { I2C_Start(); //I2C写数据 I2C_send_byte(AT24C02_ADDR+0); if (!Test_ACK()) —————————————————————————————————————— ------------------------------------------------------------------------------------------------ { return(0); } I2C_send_byte(ADDR); if (!Test_ACK()) { return(0); } I2C_send_byte(DAT); if (!Test_ACK()) { return(0); } I2C_Stop(); return(1); } uchar I2C_ReadData(uchar ADDR) //I2C读数据 { uchar dat; I2C_Start(); I2C_send_byte(AT24C02_ADDR+0); if (!Test_ACK()) { return(0); —————————————————————————————————————— ------------------------------------------------------------------------------------------------ } I2C_send_byte(ADDR); if (!Test_ACK()) { return(0); } Master_ACK(0); I2C_Start(); I2C_send_byte(AT24C02_ADDR+1); if (!Test_ACK()) { return(0); } dat = I2C_read_byte(); Master_ACK(0); I2C_Stop(); return(dat); } void jishu() //计数 { if(!k2) { if(Count_B<99999) —————————————————————————————————————— ------------------------------------------------------------------------------------------------ { DATA++; M=1; if(DATA<50) { GW=DATA; I2C_WriteData(DAGW,DATA); delay(1); } if(DATA>49) { DATA1++; DATA=0; GW=0; SW=SD+DATA1; I2C_WriteData(DAGW,DATA); delay(1); I2C_WriteData(DASW,SW); delay(1); } if(SW>49) { DATA=0; DATA1=0; GW=0; —————————————————————————————————————— ------------------------------------------------------------------------------------------------ SW=0; DATA2++; BW=BD+DATA2; I2C_WriteData(DAGW,DATA); delay(1); I2C_WriteData(DASW,SW); delay(1); I2C_WriteData(DABW,BW); delay(1); } } } while(!k2); } void qingchu() //清除数据 { if(!k1) { DATA=0; DATA1=0; DATA2=0; SD=0; GW=0; SW=0; BW=0; —————————————————————————————————————— ------------------------------------------------------------------------------------------------ BD=0; M=1; OUT1=1; OUT2=1; if(!I2C_ReadData(DABW)==0) { I2C_WriteData(DABW,0X00); delay(1);; I2C_WriteData(DASW,0X00); delay(1); I2C_WriteData(DAGW,0X00); delay(1); } if(!I2C_ReadData(DASW)==0) { I2C_WriteData(DASW,0X00); delay(1); I2C_WriteData(DAGW,0X00); delay(1); } else { I2C_WriteData(DAGW,0X00); delay(1); } GW=I2C_ReadData(DAGW); delay(1); SW=I2C_ReadData(DASW); delay(1); BW=I2C_ReadData(DABW); delay(1); } while(!k1); —————————————————————————————————————— ------------------------------------------------------------------------------------------------ } void shujuxianshi_init() //初始化数据显示 { uchar i; Count_B=BW*2500+SW*50+GW; delay(1); Buffer_Counts[5]=Count_B/10000; Buffer_Counts[4]=Count_B%10000/1000; Buffer_Counts[3]=Count_B%1000/100; Buffer_Counts[2]=Count_B%100/10; Buffer_Counts[1]=Count_B%10; if( Buffer_Counts[5]==0) { Buffer_Counts[5]=0x0a; if( Buffer_Counts[4]==0) { Buffer_Counts[4]=0x0a; if( Buffer_Counts[3]==0) { Buffer_Counts[3]=0x0a; if( Buffer_Counts[2]==0) Buffer_Counts[2]=0x0a; } } } for(i=1;i<6;i++) //刷新显示在数码管上 { temp=DSY_CODE[Buffer_Counts[i]]; WR_595(); delay(1); } —————————————————————————————————————— ------------------------------------------------------------------------------------------------ OUT_595(); } void shujuxianshi() //数据显示 { uchar i; if(M==1) { M=0; Count_B=BW*2500+SW*50+GW; delay(1); Buffer_Counts[5]=Count_B/10000; Buffer_Counts[4]=Count_B%10000/1000; Buffer_Counts[3]=Count_B%1000/100; Buffer_Counts[2]=Count_B%100/10; Buffer_Counts[1]=Count_B%10; if( Buffer_Counts[5]==0) { Buffer_Counts[5]=0x0a; if( Buffer_Counts[4]==0) { Buffer_Counts[4]=0x0a; if( Buffer_Counts[3]==0) { —————————————————————————————————————— ------------------------------------------------------------------------------------------------ Buffer_Counts[3]=0x0a; if( Buffer_Counts[2]==0) Buffer_Counts[2]=0x0a; } } } for(i=1;i<6;i++) //刷新显示在数码管上 { temp=DSY_CODE[Buffer_Counts[i]]; WR_595(); delay(1); } OUT_595(); } } void main() { DAGW=1; //24C02 数据存储地址 0-255 DASW=2; //24C02 数据存储地址 0-255 DABW=3; I2C_init(); GW=I2C_ReadData(DAGW); //上电后首先读出24C02第DAGW单—————————————————————————————————————— ------------------------------------------------------------------------------------------------ 元的值 SW=I2C_ReadData(DASW); //上电后首先读出24C02第DASW单元的值 BW=I2C_ReadData(DABW); DATA=GW; SD=SW; BD=BW; shujuxianshi_init(); while(1) { qingchu(); jishu(); shujuxianshi(); if(Count_B==100) OUT1=0; if(Count_B==50) OUT2=0; } } ——————————————————————————————————————