AT24C08的读、写程序

#include/AT24C08读取、写入/extner void delay ms(unsigned int)；/extnern void read I2C(unsigned char * ram address，unsigned char rom address，unsigned char bytes)；/extnern void write I2C(unsigned char * ram address，unsigned char rom address，unsigned char bytes)；/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *# define writevice address0x A0/写入设备地址# define readvceaddress0xa1/读取器地址/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *sbit SCL=P1 0；/I2C时钟线SCLsbit sda=P1 1；/I2C数据线SDAsbit dog=P3 7；/程序执行标志和数据读写正确标志/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *void delay unsigned int number(ms)/延迟子例程，延迟大小取决于运行频率和number值Unsigned char tempfor(；号码！=0；Number -，DOG=！DOG)/循环，DOG用于输出状态信号for(temp=112；Temp！=0；Temp - )/空循环/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *Void Start()/启动信号子程序SDA=1；DelayMs(1)；/延迟SCL=1；DelayMs(1)；SDA=0；DelayMs(1)；SCL=0；DelayMs(1)；/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *Void Stop()/关机信号子程序SCL=0；DelayMs(1)；SDA=0；DelayMs(1)；SCL=1；DelayMs(1)；SDA=1；DelayMs(1)；/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *Void Ack()/发送响应占位符程序SDA=0；DelayMs(1)；SCL=1；DelayMs(1)；SCL=0；DelayMs(1)；SDA=1；DelayMs(1)；/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *发送Void noacck ()/非响应座位程序SDA=1；DelayMs(1)；SCL=1；DelayMs(1)；SCL=0；DelayMs(1)；/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *Bit TestAck()/响应位检查子程序位错误位；SDA=1；DelayMs(1)；SCL=1；DelayMs(1)；ErrorBit=SDA/读取数据线的响应状态DelayMs(1)；SCL=0；DelayMs(1)；return(error bit)；/返回响应状态。0是正常响应信号，1是非响应信号/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *编写bit write 8 bit(unsigned charinput)/字节数据子程序/input是要发送的数据Unsigned char tempfor(temp=8；Temp！=0；Temp - )/循环移动，按位发送数据Sda=(位)(input0x 80)；/获取数据的最高位DelayMs(1)；SCL=1；DelayMs(1)；SCL=0；DelayMs(1)；Input=input1/向左一个字符return 1；/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *void write I2C(unsigned char * wdata，unsigned char rom address，unsigned char number)写入n字节数据子程序start()；/开始write 8 bit(WriteDeviceAddress)；/写入设备的寻址地址TestAck()；/确认响应write 8 bit(rom address)；/写入I2C设备内部数据存储的第一个地址TestAck()；/确认响应for(；号码！=0；Number-()/循环，逐字节发送write 8 bit(* Wdata)；/1字节写入TestAck()；/确认响应Wdata/指针增加，指向以下数据stop()；/停止DelayMs(10)；/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *读取Unsigned char Read8Bit()/单字节数据子程序Unsigned char temp，rbyte=0；for(temp=8；Temp！=0；Temp - )/循环，逐字节读取数据SCL=1；DelayMs(1)；Rbyte=rbyte1/向左一个字符DelayMs(1)；rbyte=rbyte |(unsigned char)(sda)；/数据线SDA中的数据保存在rbyte的最小位中SCL=0；DelayMs(1)；return(rbyte)；/返回读取的字节数据/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *void read I2C(unsigned char * ram address，unsigned char rom address，unsigned char bytes)读取n字节数据子程序start()；/开始write 8 bit(WriteDeviceAddress)；/写入设备的寻址地址TestAck()；/确认响应write 8 bit(rom address)；/第一个地址，用于写入I2C设备的内部数据TestAck()；/确认响应start()；/重新启动write 8 bit(readdvice address)；/写入读取设备的寻址地址TestAck()；/确认响应While(bytes！=1)/字节数据循环读取* ram address=read 8 bit()；/读取字节ack()；/响应RamAddress/地址指针增量bytes-；/减少要读取的数据数* ram address=read 8 bit()；/读取最后一个字节数据no ack()；/无响应stop()；/停止Void main()Unsigned char write byte 8=0xc0，0x34，0x12，0x11，0x22，0x01，0x00，0x 00 ；/需要写入的8字节USB数据IDunsigned char reabyte8；/用于存储读取的8字节数据Unsigned char * addw/写入数据指针操作Unsigned char * addr/读取数据指针行为unsigned char I；unsigned char ok=0；bit write=1；/读取和写入旗标DOG=0；While(1)如果If(write=1)/write=1，则执行写入和读取操作Addw=writeByte/写入地址映射Addr=readByte/读取地址映射WriteI2C(ad