FM24C04驱动程序

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I2C FRAM3V5V 评：驱动程序对于所有的铁电系列都是适用的，只是容量、电平（和）的不同，驱动程 51MCUMCU 序是针对的，但对其他只要稍微修改就可使用。 在存贮数据量不大，而且读写次数频繁时，可选择I2C FRAM。 //THIS CODE WAS DESIGNED TO DEMONSTRATE HOW THE FM24C04/FM24C04A SERIAL FRAM COULD //BE INTERFACED TO THE 8051 MICROCONTROLLER. THE INTERFACE USES 2LINES //FROM PORT 2(P2.7 AND P2.6) TO COMMUNICATE. //THE CODE SHOWN DEMONSTRATES A'RANDOM READ' AND 'BYTE WRITE'. THE OTHER * //MODES OF OPERATION CAN BE CREATED BY EXPANDING UPON THESE ROUTINES. //深圳市华胄科技有限公司 //the first date writed:2003-11-20 //email:gaoqiang@huazhoucn.com //by:tiger //============================= ＃i nclude<reg52.h> ＃i nclude<intrins.h> #define uchar unsigned char #define uint unsigned int #define IIC_READ 0XA1 //定义读指令 #define IIC_WRITE 0XA0 //定义写指令 #define NOP _nop_() //#define SDA INT0 //#define SCL T0 //============================== uchar idata buff[32]; //save the byte read out form iic device in test operation uchar idata readbuff[32];//测试数组，暂存写入读出数据 //uchar writebuff[32]; //=============================== sbit SDA=P1^4;//P2^7; //THE SDA BIT IS PORT 2BIT 7 sbit SCL=P1^7;//P2^6; //THE SCL BIT IS PORT 2BIT 6 //sbit WP=P2^5; //sbit test=P1^0; //=============================== //define abit_operation byte to use in shift operation //use this mode can achieve high operation speed uchar bdata bbyte;//定义位操作用数组，采用此方法可提高位操作速度 sbit a0=bbyte^0; sbit a1=bbyte^1; sbit a2=bbyte^2; sbit a3=bbyte^3; sbit a4=bbyte^4;