24c02存储多个数据

24c02存储多个数据#include#include #define uint unsigned int#define uchar unsigned charsbit sda = P2 0; /IO口定义sbit scl = P2 1;/此为待写入24c02的数据。为了便于验证结果，数组的内容为周期重复的。char code music = 0x55, 0xaa, 0x0f, 0xf0, 0x55, 0xaa, 0x0f, 0xf0, 0x55, 0xaa, 0x0f, 0xf0,0x55, 0xaa, 0x0f, 0xf0, 0x55, 0xaa, 0x0f, 0xf0, 0x55, 0xaa, 0x0f, 0xf0,0x55, 0xaa, 0x0f, 0xf0, 0x55, 0xaa, 0x0f, 0xf0, 0x55, 0xaa, 0x0f, 0xf0,0x55, 0xaa, 0x0f, 0xf0, 0x55, 0xaa, 0x0f, 0xf0, 0x55, 0xaa, 0x0f, 0xf0,0x55, 0xaa, 0x0f, 0xf0, 0x55, 0xaa, 0x0f, 0xf0, 0x55, 0xaa, 0x0f, 0xf0; /由于最后还要讲这些数据读出送到P1口，故可发现P1口相连的led有规律地闪烁15个周期uchar data buffer100; /用于缓存从24c02中读取的数据。delay(unsigned int m)unsigned int n, p;for (n = m; n0; n-)for (p = 125; p0; p-);void nop()_nop_();_nop_();/24C02读写驱动程序/void delay1(unsigned int m)unsigned int n;for (n = 0; nm; n+);void init() /24c02初始化子程序scl = 1;nop();sda = 1;nop();void start() /启动I2C总线sda = 1;nop();scl = 1;nop();sda = 0;nop();scl = 0;nop();void stop() /停止I2C总线sda = 0;nop();scl = 1;nop();sda = 1;nop();void writebyte(unsigned char j) /写一个字节unsigned char i, temp;temp = j;for (i = 0; i8; i+)temp = temp 1;scl = 0;nop();sda = CY;/temp左移时，移出的值放入了CY中nop();scl = 1;/待sda线上的数据稳定后，将scl拉高nop();scl = 0;nop();sda = 1;nop();unsigned char readbyte() /读一个字节unsigned char i, j, k = 0;scl = 0; nop(); sda = 1;for (i = 0; i8; i+)nop(); scl = 1; nop();if (sda = 1)j = 1;elsej = 0;k = (k 1) | j;scl = 0;nop();return(k);void clock() /I2C总线时钟unsigned char i = 0;scl = 1;nop();while (sda = 1) & (i255)i+;scl = 0;nop();/从24c02的地址address中读取一个字节数据/unsigned char read24c02(unsigned char address)unsigned char i;start();writebyte(0xa0);clock();writebyte(address);clock();start();writebyte(0xa1);clock();i = readbyte();stop();delay1(100);return(i);/向24c02的address地址中写入一字节数据info/void write24c02(unsigned char address, unsigned char info)start();writebyte(0xa0);clock();writebyte(address);clock();writebyte(info);clock();stop();delay1(5000); /这个延时一定要足够长，否则会出错。因为24c02在从sda上取得数据后，还需要一定时间的烧录过程。void main()uchar add, i, j, m;init(); /初始化24C02P1 = 0X55;while (add != sizeof(music)write24c02(0x00 + add, musicadd);add+;if (add % 4 = 0)P1 = P1;P1 = 0X00;/到此为止，向24C02中写入数据的过程均已结束。下面的程序为附加的。/将已写入的数据再读出，送到P1口，通过观察led的亮