基于PIC16F877A单片机的温度,时间显示

基于 PIC16F877A 单片机的温度，时间显示以及闹钟设置，硬件和软件配备一，硬件图#include_CONFIG(0x3B31);#define rs RD0#define rw RD1#define en RD2#define BEEP RD3#define s1 RA0#define s2 RA1#define s3 RA2#define s4 RA3#define uint unsigned int#define uchar unsigned charsigned char set_time7=0,58,23,6,1,5,12;/秒 分 时 星期 日 月 年signed char read_time7=0,0,0,0,0,0,0;signed char shi=7,fen=15,alarm_time=1,reapeat_fen=2,cent;/闹钟时，闹钟分，闹铃响分钟，闹铃响间隔uchar s1_num,s2_num;const uchar alarm=“ALARM TIME:“;const uchar mode=“MODE:“;const uchar rpt=“RPT:“;const uchar min=“min“;void PORT_INIT()TRISA=0xff;/A 口设置为输入ADCON1=0x06;/RA 口上电复位为模拟输入口TRISC3=1;/SCL 和 SDA 设置为输入TRISC4=1;TRISD=0x00;/D 口设置为输出void IIC_INIT()SSPCON=0x28;STAT_SMP=0;SSPADD=4;void delayms(uint z)/延时 函数uint x,y;for(x=z;x0;x-)for(y=110;y0;y-);void delayus(uint k)while(k-);void write_byte_low(uchar R1,uchar flag0)/写一个字节的低 4 位，flag0 为指令/数据选择位 /,0 为写指令，1 为写数据uchar low;rs=flag0;low=R1low=low4;write_byte_low(dat_high,flag1);dat_low=datwrite_byte_low(dat_low,flag1);NOP(); void write_string(uchar address,uchar const *str)/往指定的地址写字符串uchar i=0;lcd_write(address,0);while(stri!=0)lcd_write(stri,1);delayus(5);i+;void LCD_INIT()/初始化函数rw=0;en=0;delayms(20);write_byte_low(0b0011,0);delayms(1);write_byte_low(0b0011,0);delayus(10);write_byte_low(0b0011,0);delayus(10);write_byte_low(0b0010,0);delayms(1);lcd_write(0x28,0);delayms(5);lcd_write(0x0c,0);delayms(5);lcd_write(0x01,0);delayms(5);lcd_write(0x06,0);delayms(5);void naoling()uchar i;for(i=0;i20;i+)BEEP=1;delayus(5);BEEP=0;delayus(5);void IIC_SEND(uchar num)SSPBUF=num;while(STAT_RW=1);/等待发送结束while(SSPIF=0);while(ACKSTAT=1);/等待应答signed char read_temp()/读温度signed char temp;SEN=1;while(SEN=1);IIC_SEND(0b10011010);IIC_SEND(0);RSEN=1;while(RSEN=1);IIC_SEND(0b10011011);RCEN=1;while(RCEN=1);/ SSPIF=0;/ while(SSPIF=0);/等待接收结束temp=SSPBUF;PEN=1;while(PEN=1);return temp;void dispose()/BCD 数据处理