PIC16F690单片机驱动AT24C128程序

#include <pic.h> //__CONFIG(INTIO&WDTEN&PWRTEN&MCLRDIS); __CONFIG(0x3b34); #define uchar unsigned char #define uint unsigned int #define scl RC4 #define sda RC5 uchar sec; //uchar table[]={0x48,0x3d,0x6d,0x4b,0x67,0x77,0x4c,0x7f,0x6f}; void delay() { ;;;;;;;;;;;;;} void delay1ms(uint z) { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } void start() //开始信号 { sda=1; delay(); scl=1; delay(); sda=0; delay(); } void stop() //停止 { sda=0; delay(); scl=1; delay(); sda=1; delay(); } void respons() //应答 { uchar i=0; TRISC5=1; scl=1; delay(); while((sda==1)&&(i<250))i++; scl=0; delay(); TRISC5=0; } void init() { sda=1; delay(); scl=1; delay(); } void write_byte(uchar date) { uchar bit_count,a; for (bit_count=0;bit_count<8;bit_count++) { if ((date<<bit_count)&0x80) {a=1;} else {a=0;} scl=0; delay(); sda=a; delay(); scl=1; delay(); } scl=0; delay(); sda=1; delay(); } uchar read_byte() { uchar i,k; scl=0; delay(); sda=1; delay(); TRISC5=1; for(i=0;i<8;i++) { scl=1; delay(); k=(k<<1)|sda; scl=0; delay(); } TRISC5=0; return k; } void write_add(uint address,uchar date) { uchar address_h,address_l; address_h=address/256; address_l=address%256; start(); write_byte(0xa0); respons(); write_byte(address_h); respons(); write_byte(address_l); respons(); write_byte(date); respons(); stop(); } uchar read_add(uint address) { uchar date; uchar address_h,address_l; address_h=address/256; address_l=address%256; start(); write_byte(0xa0); respons(); write_byte(address_h); respons(); write_byte(address_l); respons(); start(); write_byte(0xa1); respons(); date=read_byte(); stop(); return date; } void usart_init() { TRISB=0xff; TXSTA=0x24; RCSTA=0x90; SPBRG=25; GIE=1; PEIE=1; RCIE=1; WPUB5=0; //禁止RB5弱上拉 } void main() { OSCCON=0B01100110;//4MHz；器件运行在内部振荡器之下；高频稳定；低频稳定；时钟源由FOSC<2:0>决定 ANSEL = 0X00; ANSELH = 0X00; usart_init(); TRISC4=0; TRISC5=0; init(); sec=0xcc; write_add(0x00a0,sec); //写入数据 delay1ms(500); sec=read_add(0x00a0); //读出所写的数据 while(1) { TXREG=sec; //将读出的数据通过串口发送给串口调试助手 while(!TRMT); delay1ms(1000); } }