Single chip electronic perpetual calendar with lunar calendar display

Physical picture of the perpetual calendar:

The schematic diagram of the electronic perpetual calendar is as follows:


The simulation schematic diagram is as follows

The microcontroller source program is as follows:

#include

//#include"DS18B20_3.H"

#include

#include

#define uint unsigned int

#define uchar unsigned char

#define wd 1 //define whether there is temperature function =0 when there is no temperature, =1 when there is temperature

#define yh 0x80 //The initial position of the first line of LCD, because the first character address D7 of LCD1602 is always 1 (100000000=80)

#define er 0x80+0x40 //LCD second line initial position (because the first character position address of the second line is 0x40)

//Pin connection definition between LCD screen and C51 (display data line connected to C51 P0 port)

sbit en=P2^7;

sbit rw=P2^6; //If rw is grounded in hardware, you don't need to write this sentence and the following rw=0

sbit rs=P2^5;

//Definition of connection between the timing button and C51 pin

sbit set=P3^0; //Set key

sbit add=P3^1; //Add key

sbit dec=P3^2; //Decrement key

sbit seeNL_NZ=P3^3; //Check the lunar calendar/alarm clock

sbit DQ=P3^7; //

sbit buzzer=P2^0; //Buzzer, driven by transistor 8550, port low level rings

sbit led=P2^4; //LCD backlight switch

bit  led1=1;

bit ZDK=1,NZK=1; //Hourly time signal, alarm switch control bit =0, off, =1, on

bit zdkg=0,nzkg=0;

unsigned char temp_miao;

unsigned char bltime; //Backlight on time

//Pin connection definition between DS1302 clock chip and C51

sbit IO=P1^1;

sbit SCLK=P1^0;

sbit RST=P1^2;

uchar a,miao,shi,fen,ri,yue,nian,week,setn,temp;

uint flag;

//flag is used to read the temperature value in the header file and display the temperature value

bit c_moon;

uchar nz_shi=12,nz_fen=0,nz_miao=0,setNZn; //define alarm clock variables

uchar shangyimiao,bsn,temp_hour; //Record the last second

uchar T_NL_NZ; //Counter

bit timeron=0; //Alarm enable flag

bit baoshi=0; //Hourly time flag

bit p_r=0; // Normal year/rainy year =0 displays normal year, =1 displays rainy year

data uchar year_moon,month_moon,day_moon,week;

sbit ACC0=ACC^0;

sbit ACC7=ACC^7;

/************************************************************

ACC accumulator = A

ACC.0=E0H

ACC.0 is the 0th bit of ACC. Acc is bit addressable.

The accumulator ACC is an 8-bit storage unit used to store data. However, this storage unit has a special status.

It is a very critical unit in the microcontroller. Many operations must be performed through ACC.

A is often used to represent the accumulator. However, there are some exceptions, such as in the PUSH instruction, which must use the name ACC.

Generally speaking, A represents the contents of the accumulator, and ACC represents the address of the accumulator.

***************************************************************/

//********Gregorian calendar to lunar calendar table************************************

code uchar year_code[597]={

                    0x04,0xAe,0x53,    //1901 0

                    0x0A,0x57,0x48,    //1902 3

                    0x55,0x26,0xBd,    //1903 6

                    0x0d,0x26,0x50,    //1904 9

                    0x0d,0x95,0x44,    //1905 12

                    0x46,0xAA,0xB9,    //1906 15

                    0x05,0x6A,0x4d,    //1907 18

                    0x09,0xAd,0x42,    //1908 21

                    0x24,0xAe,0xB6,    //1909

                    0x04,0xAe,0x4A,    //1910

                    0x6A,0x4d,0xBe,    //1911

                    0x0A,0x4d,0x52,    //1912

                    0x0d,0x25,0x46,    //1913

                    0x5d,0x52,0xBA,    //1914

                    0x0B,0x54,0x4e,    //1915

                    0x0d,0x6A,0x43,    //1916

                    0x29,0x6d,0x37,    //1917

                    0x09,0x5B,0x4B,    //1918

                    0x74,0x9B,0xC1,    //1919

                    0x04,0x97,0x54,    //1920

                    0x0A,0x4B,0x48,    //1921

                    0x5B,0x25,0xBC,    //1922

                    0x06,0xA5,0x50,    //1923

                    0x06,0xd4,0x45,    //1924

                    0x4A,0xdA,0xB8,    //1925

                    0x02,0xB6,0x4d,    //1926

                    0x09,0x57,0x42,    //1927

                    0x24,0x97,0xB7,    //1928

                    0x04,0x97,0x4A,    //1929

                    0x66,0x4B,0x3e,    //1930

                    0x0d,0x4A,0x51,    //1931

                    0x0e,0xA5,0x46,    //1932

                    0x56,0xd4,0xBA,    //1933

                    0x05,0xAd,0x4e,    //1934

                    0x02,0xB6,0x44,    //1935

                    0x39,0x37,0x38,    //1936

                    0x09,0x2e,0x4B,    //1937

                    0x7C,0x96,0xBf,    //1938

                    0x0C,0x95,0x53,    //1939

                    0x0d,0x4A,0x48,    //1940

                    0x6d,0xA5,0x3B,    //1941

                    0x0B,0x55,0x4f,    //1942

                    0x05,0x6A,0x45,    //1943

                    0x4A,0xAd,0xB9,    //1944

                    0x02,0x5d,0x4d,    //1945

                    0x09,0x2d,0x42,    //1946

                    0x2C,0x95,0xB6,    //1947

                    0x0A,0x95,0x4A,    //1948

                    0x7B,0x4A,0xBd,    //1949

                    0x06,0xCA,0x51,    //1950

                    0x0B,0x55,0x46,    //1951

                    0x55,0x5A,0xBB,    //1952

                    0x04,0xdA,0x4e,    //1953

                    0x0A,0x5B,0x43,    //1954

                    0x35,0x2B,0xB8,    //1955

                    0x05,0x2B,0x4C,    //1956

                    0x8A,0x95,0x3f,    //1957

                    0x0e,0x95,0x52,    //1958

                    0x06,0xAA,0x48,    //1959

                    0x7A,0xd5,0x3C,    //1960

                    0x0A,0xB5,0x4f,    //1961

                    0x04,0xB6,0x45,    //1962

                    0x4A,0x57,0x39,    //1963

                    0x0A,0x57,0x4d,    //1964

                    0x05,0x26,0x42,    //1965

                    0x3e,0x93,0x35,    //1966

                    0x0d,0x95,0x49,    //1967

                    0x75,0xAA,0xBe,    //1968

                    0x05,0x6A,0x51,    //1969

                    0x09,0x6d,0x46,    //1970

                    0x54,0xAe,0xBB,    //1971

                    0x04,0xAd,0x4f,    //1972

                    0x0A,0x4d,0x43,    //1973

                    0x4d,0x26,0xB7,    //1974

                    0x0d,0x25,0x4B,    //1975

                    0x8d,0x52,0xBf,    //1976

                    0x0B,0x54,0x52,    //1977

                    0x0B,0x6A,0x47,    //1978

                    0x69,0x6d,0x3C,    //1979

                    0x09,0x5B,0x50,    //1980

                    0x04,0x9B,0x45,    //1981

                    0x4A,0x4B,0xB9,    //1982

                    0x0A,0x4B,0x4d,    //1983

                    0xAB,0x25,0xC2,    //1984

                    0x06,0xA5,0x54,    //1985

                    0x06,0xd4,0x49,    //1986

                    0x6A,0xdA,0x3d,    //1987

                    0x0A,0xB6,0x51,    //1988

                    0x09,0x37,0x46,    //1989

                    0x54,0x97,0xBB,    //1990

                    0x04,0x97,0x4f,    //1991

                    0x06,0x4B,0x44,    //1992

                    0x36,0xA5,0x37,    //1993

                    0x0e,0xA5,0x4A,    //1994

                    0x86,0xB2,0xBf,    //1995

                    0x05,0xAC,0x53,    //1996

                    0x0A,0xB6,0x47,    //1997

                    0x59,0x36,0xBC,    //1998

                    0x09,0x2e,0x50,    //1999 294

                    0x0C,0x96,0x45,    //2000 297

                    0x4d,0x4A,0xB8,    //2001

                    0x0d,0x4A,0x4C,    //2002

                    0x0d,0xA5,0x41,    //2003

                    0x25,0xAA,0xB6,    //2004

                    0x05,0x6A,0x49,    //2005

                    0x7A,0xAd,0xBd,    //2006

                    0x02,0x5d,0x52,    //2007

                    0x09,0x2d,0x47,    //2008

                    0x5C,0x95,0xBA,    //2009

                    0x0A,0x95,0x4e,    //2010

                    0x0B,0x4A,0x43,    //2011

                    0x4B,0x55,0x37,    //2012

                    0x0A,0xd5,0x4A,    //2013

                    0x95,0x5A,0xBf,    //2014

                    0x04,0xBA,0x53,    //2015

                    0x0A,0x5B,0x48,    //2016

                    0x65,0x2B,0xBC,    //2017

                    0x05,0x2B,0x50,    //2018

                    0x0A,0x93,0x45,    //2019

                    0x47,0x4A,0xB9,    //2020

                    0x06,0xAA,0x4C,    //2021

                    0x0A,0xd5,0x41,    //2022

                    0x24,0xdA,0xB6,    //2023

                    0x04,0xB6,0x4A,    //2024

                    0x69,0x57,0x3d,    //2025

                    0x0A,0x4e,0x51,    //2026

                    0x0d,0x26,0x46,    //2027

                    0x5e,0x93,0x3A,    //2028

                    0x0d,0x53,0x4d,    //2029

                    0x05,0xAA,0x43,    //2030

                    0x36,0xB5,0x37,    //2031

                    0x09,0x6d,0x4B,    //2032

                    0xB4,0xAe,0xBf,    //2033

                    0x04,0xAd,0x53,    //2034

                    0x0A,0x4d,0x48,    //2035

                    0x6d,0x25,0xBC,    //2036

                    0x0d,0x25,0x4f,    //2037

                    0x0d,0x52,0x44,    //2038

                    0x5d,0xAA,0x38,    //2039

                    0x0B,0x5A,0x4C,    //2040

                    0x05,0x6d,0x41,    //2041

                    0x24,0xAd,0xB6,    //2042

                    0x04,0x9B,0x4A,    //2043

                    0x7A,0x4B,0xBe,    //2044

                    0x0A,0x4B,0x51,    //2045

                    0x0A,0xA5,0x46,    //2046

                    0x5B,0x52,0xBA,    //2047

                    0x06,0xd2,0x4e,    //2048

                    0x0A,0xdA,0x42,    //2049

                    0x35,0x5B,0x37,    //2050

                    0x09,0x37,0x4B,    //2051

                    0x84,0x97,0xC1,    //2052

                    0x04,0x97,0x53,    //2053

                    0x06,0x4B,0x48,    //2054

                    0x66,0xA5,0x3C,    //2055

                    0x0e,0xA5,0x4f,    //2056

                    0x06,0xB2,0x44,    //2057