【单片机】DS1302

main.c

#include <reg52.h>#include "./lcd/lcd.h"#define ds1302_sec_add0x80//#define ds1302_min_add0x82//#define ds1302_hr_add0x84//#define ds1302_date_add0x86//#define ds1302_month_add0x88//#define ds1302_day_add0x8a//#define ds1302_year_add0x8c//#define ds1302_control_add0x8e//#define ds1302_charger_add0x90  #define ds1302_clkburst_add0xbesbit RST = P1^0;sbit SCK = P1^1;sbit IO = P1^2;unsigned char timebuf[7] = {18,40,55,16,8,17,3};    //时，分，秒，年，月，日，星期unsigned char tempbuf[7];unsigned char readbuf[7];unsigned char disbuf[7];void ds1302_write_byte(unsigned char addr, unsigned char byte){    unsigned char i;addr = addr & 0xfe;       //最低位清0SCK = 0;RST = 0;RST = 1;for(i = 0; i < 8; i++){    IO = addr & 0x01;     //最低位SCK = 0;              //上升沿SCK = 1;              //上升沿addr >>= 1;           //次低位}for(i = 0; i < 8; i++){    IO = byte & 0x01;SCK = 0;SCK = 1;byte >>= 1;}SCK = 0;RST = 0;}unsigned char ds1302_read_byte(unsigned char addr){    unsigned char i;unsigned char temp;addr = addr & 0xfe;       //最低位清0SCK = 0;RST = 0;RST = 1;addr = addr + 1;for(i = 0; i < 8; i++){    IO = addr & 0x01;     //最低位SCK = 0;              //上升沿SCK = 1;              //上升沿addr >>= 1;           //次低位}for(i = 0; i < 8; i++){        SCK = 1;        SCK = 0;temp >>= 1;if(IO){    temp += 0x80;}}RST = 0;return temp;}void ds1302_write_time(){    unsigned char temp;    unsigned char i;    for(i = 0; i < 7; i++)    {    temp = timebuf[i] / 10;tempbuf[i] = timebuf[i] % 10;tempbuf[i] = (temp << 4) | tempbuf[i];}    ds1302_write_byte(ds1302_control_add,0x00);     //关闭写保护    ds1302_write_byte(ds1302_hr_add,tempbuf[0]);    ds1302_write_byte(ds1302_min_add,tempbuf[1]);    ds1302_write_byte(ds1302_sec_add,tempbuf[2]);ds1302_write_byte(ds1302_year_add,tempbuf[3]);ds1302_write_byte(ds1302_month_add,tempbuf[4]);ds1302_write_byte(ds1302_date_add,tempbuf[5]);ds1302_write_byte(ds1302_day_add,tempbuf[6]);    ds1302_write_byte(ds1302_control_add,0x80);    //打开写保护}void ds1302_read_time(){    unsigned char i;unsigned char high;unsigned char low;readbuf[0] = ds1302_read_byte(ds1302_hr_add);readbuf[1] = ds1302_read_byte(ds1302_min_add);readbuf[2] = ds1302_read_byte(ds1302_sec_add);readbuf[3] = ds1302_read_byte(ds1302_year_add);readbuf[4] = ds1302_read_byte(ds1302_month_add);readbuf[5] = ds1302_read_byte(ds1302_date_add);readbuf[6] = ds1302_read_byte(ds1302_day_add);for(i = 0; i < 7; i++){    high = (readbuf[i] >> 4);low = (readbuf[i] & 0x0f);disbuf[i] = high * 10 + low;}}void lcd_dis_time(){    unsigned char lcd_distime[9] = {0};unsigned char lcd_time[9] = {0};lcd_distime[0] = (disbuf[0] / 10) + 0x30;lcd_distime[1] = (disbuf[0] % 10) + 0x30;lcd_distime[2] = ':';lcd_distime[3] = (disbuf[1] / 10) + 0x30;lcd_distime[4] = (disbuf[1] % 10) + 0x30;lcd_distime[5] = ':';lcd_distime[6] = (disbuf[2] / 10) + 0x30;lcd_distime[7] = (disbuf[2] % 10) + 0x30;lcd_time[0] = (disbuf[3] / 10) + 0x30;lcd_time[1] = (disbuf[3] % 10) + 0x30;lcd_time[2] = '.';lcd_time[3] = (disbuf[4] / 10) + 0x30;lcd_time[4] = (disbuf[4] % 10) + 0x30;lcd_time[5] = '.';lcd_time[6] = (disbuf[5] / 10) + 0x30;lcd_time[7] = (disbuf[5] % 10) + 0x30;lcd_dis_str(1,1,"DAY:20");lcd_dis_str(1,7,lcd_time);lcd_dis_str(2,6,lcd_distime);switch(readbuf[6]){    case 1:{    lcd_dis_str(2,1,"MON");break;}case 2:{    lcd_dis_str(2,1,"TUE");break;}case 3:{    lcd_dis_str(2,1,"WED");break;}case 4:{    lcd_dis_str(2,1,"THU");break;}case 5:{    lcd_dis_str(2,1,"FRI");break;}case 6:{    lcd_dis_str(2,1,"SAT");break;}case 7:{    lcd_dis_str(2,1,"SUN");break;}}}void main(){    lcd_init();ds1302_write_time();while(1){    ds1302_read_time();lcd_dis_time();}}

lcd.c

#include <reg52.h>#include "../delay/delay.h"#include "lcd.h"/*====================================================                 判断写入命令/数据函数=====================================================*/void lcd_write(unsigned char byte, unsigned char flag){    if(flag){    RS = 1;        //选择数据寄存器}else{    RS = 0;        //选择指令寄存器}RW = 0;            //写E = 1;             //选中LCDLCDPORT = byte;delay_us(5);       //稳定E = 0;             //失能LCD}/*====================================================                    LCD初始化函数=====================================================*/void lcd_init(){    delay_ms(15);lcd_write(0x38,LCD_WRITE_COM);    //显示8位数据接口，两行显示，5*7点阵字符delay_ms(5);lcd_write(0x38,LCD_WRITE_COM);delay_ms(5);lcd_write(0x38,LCD_WRITE_COM);delay_ms(5);lcd_write(0x38,LCD_WRITE_COM);delay_ms(5);lcd_write(0x08,LCD_WRITE_COM);    //关闭显示，关闭光标的闪烁delay_ms(5);lcd_write(0x01,LCD_WRITE_COM);    //清屏delay_ms(5);lcd_write(0x06,LCD_WRITE_COM);    //设置指针方式，画面不平移delay_ms(5);lcd_write(0x0c,LCD_WRITE_COM);    //打开显示delay_ms(5);}/*====================================================================================                                 写入字符函数函数原型：void lcd_dis_byte(unsigned char x, unsigned char y, unsigned char byte);说明：x为行（1——2），y为列（1——8）。=====================================================================================*/void lcd_dis_byte(unsigned char x, unsigned char y, unsigned char byte){    unsigned char add;    if(((0 == x) || (x > 2)) || ((0 == y) || (y > 16))){    return ;}    add = 0x80 + (x - 1) * 0x40 + (y - 1);lcd_write(add,LCD_WRITE_COM);     lcd_write(byte,LCD_WRITE_DATA);}/*====================================================================================                                  写入字符串函数函数原型：void lcd_dis_str(unsigned char x, unsigned char y, unsigned char *disdata);说明：x为行（1——2），y为列（1——8）。=====================================================================================*/void lcd_dis_str(unsigned char x, unsigned char y, unsigned char *disdata){    unsigned char add;    if(((0 == x) || (x > 2)) || ((0 == y) || (y > 16))){    return ;}    add = 0x80 + (x - 1) * 0x40 + (y - 1);lcd_write(add,LCD_WRITE_COM);    while(*disdata != '\0'){        lcd_write(*disdata,LCD_WRITE_DATA);disdata++;}}#if 0/*===========================================================================                                时间显示函数============================================================================*/void lcd_dis_time(){    lcd_write(0x80 + 4,LCD_WRITE_COM);lcd_write((hour / 10) + 0x30,LCD_WRITE_DATA);lcd_write((hour % 10) + 0x30,LCD_WRITE_DATA);lcd_write((min / 10) + 0x30,LCD_WRITE_DATA);lcd_write((min % 10) + 0x30,LCD_WRITE_DATA);lcd_write((sec / 10) + 0x30,LCD_WRITE_DATA);lcd_write((sec % 10) + 0x30,LCD_WRITE_DATA);}#endif