ATmega16单片机读取DS1305并通过串口发送时间,每5分钟发一次利用中断.doc

基于ATmega16的读取DS1305的C语言程序，采用AVR-GCC编程 读取中断程序，每5分钟通过串口发送一次时间。。。。。 #define F_CPU 1000000UL #include avr/io.h #include util/delay.h #include avr/interrupt.h /*时钟芯片引脚定义*/ //输入输出口 #define sdio_1 PORTD|=_BV(PD4) #define sdio_0 PORTD=~_BV(PD4) #define sdio_in DDRD=~_BV(PD4) ;PORTD|=_BV(PD4) #define sdio_out DDRD|=_BV(PD4) #define read_sdio (PIND_BV(PD4)) //时钟引脚 #define sclk_1 PORTD|=_BV(PD5) #define sclk_0 PORTD=~_BV(PD5) //使能引脚 #define ce_1 PORTD|=_BV(PD6) #define ce_0 PORTD=~_BV(PD6) unsigned char second,minute,hour,day,month,week,year; unsigned char se1=45,min1=33,hou1=16,day1=26,mon1=12,week1=03,year1=12; unsigned int mn,un,tm=0; //数据定义 unsigned char temp=5; //时间选择...temp分钟 unsigned char data[500]={0,0}; /*写一个字节*/ void write_1305byte(unsigned char date) { unsigned char i; sdio_out; _delay_us(10); for(i=0x01;i!=0x00;i=1) { if(datei) sdio_1; else sdio_0; sclk_1; _delay_us(300); sclk_0; } } /*读一个字节*/ unsigned char read_1305byte() { unsigned char i,date=0; sdio_in; _delay_us(10); for(i=0;i8;i++) { if(read_sdio) { date|=_BV(i); } sclk_1; _delay_us(300); sclk_0; } sdio_out; return ((date/16*10)+(date%16)); } /*向DS1305指定位置写一个数据*/ void write_1305date(unsigned char add,unsigned char date) { ce_1; _delay_us(10); write_1305byte(add); write_1305byte(date); ce_0; } /*向ds1305指定地址读一个数据*/ unsigned char read_1305date(unsigned char add) { unsigned char date=0; ce_1; _delay_us(10); write_1305byte(add); date=read_1305byte(); ce_0; return date; } /*初始化ds1305*/ void init_1305() { sclk_1; write_1305date(0x8f,0x05); //控制寄存器设置 write_1305date(0x90,0x01); //状态寄存器设置 write_1305date(0x91,0xa5); //涓电流充电 sclk_0; } /*初始化时间设置*/ void ds1305_set() { write_1305date(0x8f,0x05); //控制寄存器设置允许中断0中断 write_1305date(0x80,(se1/10)*16+se1%10); //秒 write_1305date(0x81,(min1/10)*16+min1%10);//分 write_1305date(0x82,(hou1/10)*16+hou1%10);//时 write_1305date(0x83,(week1/10)*16+week1%10);//星期 write_1305date(0x84,(day1/10)*16+day1%10);//日 write