51單片機日歷

② 51單片機 製作 日歷時鍾 用匯編語言 要詳細的代碼和硬體圖示

你好這是基於DS1302日歷時鍾的單片機匯編程序 51單片機
ORG 0000H
MOV SP,#30H
LOAD EQU P2.0
CLR LOAD
MOV R0,#0FH
MOV R1,#0AH ;亮度
ACALL TRT

MOV R0,#02H
MOV R1,#0BH ;掃描位數
ACALL TRT

MOV R0,#0FFH
MOV R1,#09H ;解碼
ACALL TRT

MOV R0,#01H
MOV R1,#0CH
CALL TRT
SETB P1.0
MOV 22H,#00H
;以下為按鍵掃描輸入初值子程序
KEYSET: MOV 73H,#01H ;設溫度初值為10度
MOV 74H,#00H
MOV 75H,#00H
CALL DISPLAY
KEY1: CALL KS1 ;調判斷有無鍵按下子程序
JNZ LK1 ;有鍵按下(A)<>0轉消抖延時
AJMP KEY1 ;無鍵按下返回,等鍵按下
LK1: CALL DEL10MS ;延時
CALL KS1 ;若有鍵按下則為真實按下
JNZ KEYI ;鍵按下(A)<>0轉鍵掃描
AJMP KEY1 ;不是鍵按下返回
KEYI: JNB ACC.0,KEYR ;加1鍵未按下,轉查減1鍵
LK2: CALL KS1 ;等待鍵釋放
CALL DEL10MS
JNZ LK2 ;未釋放,等待
INC 75H ;末位加1
MOV A,75H
CJNE A,#0AH,PPA
MOV 75H,#00H
INC 74H
MOV A,74H
CJNE A,#0AH,PPA
MOV 74H,#00H
INC 73H
PPA: CALL DISPLAY
AJMP KEY1 ;轉再次掃描
KEYR: JNB ACC.1,KEYH ;減1鍵未按下,轉查上限確認鍵
LK3: CALL KS1
CALL DEL10MS
JNZ LK3
MOV A,75H
CJNE A,#00H,PPC
MOV 75H,#09H
MOV A,74H
CJNE A,#00H,PPD
MOV 74H,#09H
DEC 73H
AJMP PPB
PPD: DEC 74H
AJMP PPB
PPC: DEC 75H
PPB: CALL DISPLAY
AJMP KEY1 ;再次掃描
KEYH: JNB ACC.2,KEYL ;上限鍵未按下,轉查下限確認鍵
LK4: CALL KS1
CALL DEL10MS
JNZ LK4
MOV A,73H
MOV 70H,A ;保存上限
MOV A,74H
MOV 71H,A
MOV A,75H
MOV 72H,A
AJMP KEY1
;KEYL: JNB ACC.3,KEY1
LK5: CALL KS1
CALL DEL10MS
JNZ LK5
MOV A,73H
MOV 6DH,A ;保存下限
MOV A,74H
MOV 6EH,A
MOV A,75H
MOV 6FH,A

EX_CON: ;CPL P1.3 ;使用儀器測試時用
CALL DS18B20 ;轉DS18B20采樣子程序
CALL DISPLAY
;以下為後向通道控制部分
CONTROL:MOV A,73H
CJNE A,6DH,NEQA
MOV A,74H
CJNE A,6EH,NEQB
CLR P1.5
CLR P1.6
JMP EX_CON ;樣溫=下限,返回採樣
NEQA: JNC NEQD ;CY=0,即(73H)>(6DH)時轉比上限
SETB P1.5
CLR P1.6
JMP EX_CON
NEQB: JNC NEQD
SETB P1.5
CLR P1.6
JMP EX_CON
NEQD: MOV A,73H
CJNE A,70H,NEQE
MOV A,74H
CJNE A,71H,NEQF
CLR P1.5
CLR P1.6
JMP EX_CON ;樣溫=上限,返回採樣
NEQE: JNC NEQH ;CY=0,即(73H)>(70H)時轉打開降溫開關
CLR P1.5
CLR P1.6
JMP EX_CON
NEQF: JNC NEQH
CLR P1.5
CLR P1.6
JMP EX_CON
NEQH: CLR P1.5
SETB P1.6
JMP EX_CON

KS1: MOV P0,#0FFH
MOV A,P0
CPL A
ANL A,#0FH
RET
DEL10MS:MOV R7,#20
S2: MOV R6,#250
S1: DJNZ R6,S1
DJNZ R7,S2
RET

;以下為顯示
DISPLAY:MOV A,73H ;字碼
MOV R0,A
MOV R1,#01H ;位置
ACALL TRT

MOV A,74H
MOV R0, A
MOV R1,#02H
ACALL TRT

MOV A,75H
MOV R0,A
MOV R1,#03H
ACALL TRT
RET
;JMP DIS

DS18B20:LCALL RESET ;測試溫度探頭存在否?
MOV A,#0CCH
LCALL WRITE
MOV A,#44H
LCALL WRITE ;命令字寫入探頭內
MOV R7,#70D ;延時
CALL DE11
LCALL RESET
MOV A,#0CCH
LCALL WRITE
MOV A,#0BEH
LCALL WRITE
LCALL READ ;讀取探頭內的溫度值
MOV B,A
MOV 21H,A ;保存溫度值低位
LCALL READ
MOV 20H,A ;保存溫度值高位
LCALL EXCHANG ;溫度值B轉D並送入顯示緩存
RET

RESET:
LA: SETB P1.0 ;復位
NOP
LB: CLR P1.0 ;480US < TS < 960US
MOV R7,#36D
CALL DE11
SETB P1.0 ;60US < T <90US
LC: MOV R7,#6D
CALL DE11
CLR C
ORL C,P1.0
JC LB
LF: MOV R7,#18D ;T > 270
CALL DE11
SETB P1.0
RET

WRITE:
MOV R3,#8
WR1: SETB P1.0
CLR P1.0 ;延時
MOV R4,#2
WR2: DJNZ R4,WR2
RRC A
MOV P1.0,C ;寫的數據在線上需延時
MOV R4,#18
WR3: DJNZ R4,WR3
NOP
SETB P1.0
DJNZ R3,WR1
SETB P1.0
RET

READ:
MOV R3,#8
RD1: CLR C
SETB P1.0 ;適當延時
NOP
NOP
CLR P1.0 ;適當延時
NOP
NOP
SETB P1.0 ;延時
MOV R4,#9
RD2: DJNZ R4,RD2
MOV C,P1.0
RRC A
MOV R5,#23
RD3: DJNZ R5,RD3
DJNZ R3,RD1
RET

DELAY: MOV R7,#10
DL2: MOV R6,#200
DL1: MOV R5,#250
DL0: DJNZ R5,DL0
DJNZ R6,DL1
DJNZ R7,DL2
RET

EXCHANG: MOV A,21H
SWAP A
ANL A,#0FH
MOV 24H,A
MOV A,20H
ANL A,#07H
SWAP A
ADD A,24H
MOV B,#10D
DIV AB
MOV 73H,A
MOV 74H,B
MOV A,21H
ANL A,#0FH
mov dptr,#SADDR ;小數部分的轉換查表
movc a,@a+dptr
MOV 75H,A
ret
SADDR: DB 00H,1H,02h ; bo_ying address in eeprom 0800h-0A08H
DB 03H,3H,04h ; da_ling address in eeprom 0A10H-0AD3H
DB 04H,05H,06h ;shou_ying address in eeprom 0AE0H-0C25H
DB 06H,7H,08h ; lu_ying address in eeprom 0C30H-0D75H
DB 08H,9H,9h,9H

DELAY15US: ;12MHZ ,15US
DE11: NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
DJNZ R7,DE11
RET

TRT: CLR P2.0 ;LOAD
MOV R2,#08H
MOV A,R1
T_1: CLR P2.2 ;SETB P2.2 ;CLK
RLC A
MOV P2.1,C ;DATA
CALL TDELAY
SETB P2.2 ;CLR P2.2
DJNZ R2,T_1
CALL TDELAY
MOV R2, #08H
MOV A,R0
TT2: CLR P2.2 ;SETB P2.2
RLC A
MOV P2.1,C
CALL TDELAY
SETB P2.2 ;CLR P2.2
DJNZ R2,TT2
SETB P2.0 ;CLR P2.0
RET

TDELAY: MOV R6,#01H
TMS0: MOV R7,#03H
TMS1: DJNZ R7,TMS1
DJNZ R6,TMS0
RET

③ 跪求 51單片機+12864液晶+1302時鍾製成的萬年歷c程序

頂層文件 萬年歷.C
#include<reg51.h>
#include "LCD1602.h"
#include "DS1302.h"
#define uchar unsigned char
#define uint unsigned int
sbit speaker=P2^4;
bit key_flag1=0,key_flag2=0;
SYSTEMTIME adjusted;
uchar sec_add=0,min_add=0,hou_add=0,day_add=0,mon_add=0,yea_add=0;
uchar data_alarm[7]={0};
/************鍵盤控制******************************/
int key_scan() //掃描是否有鍵按下
{ int i=0;
uint temp;
P1=0xf0;
temp=P1;
if(temp!=0xf0)
i=1;
else
i=0;
return i;
}
uchar key_value() //確定按鍵的值
{
uint m=0,n=0,temp;
uchar value;
uchar v[4][3]={'2','1','0','5','4','3','8','7','6','b','a','9'} ;
P1=0xfe; temp=P1; if(temp!=0xfe)m=0;
P1=0xfd;temp=P1 ;if(temp!=0xfd)m=1;
P1=0xfb;temp=P1 ;if(temp!=0xfb)m=2;
P1=0xf7;temp=P1 ;if(temp!=0xf7)m=3;
P1=0xef;temp=P1 ;if(temp!=0xef)n=0;
P1=0xdf;temp=P1 ;if(temp!=0xdf)n=1;
P1=0xbf;temp=P1 ;if(temp!=0xbf)n=2;
value=v[m][n];
return value;
}
/***************************設置鬧鈴函數*******************************/
void naoling(void)
{
uchar i=0,l=0,j;
init1602();
while(key_flag2&&i<12)
if(key_scan()){j=key_value();write_data(j);if(i%2==0)data_alarm[l]=(j-'0')*10;else {data_alarm[l]+=(j-'0');l++;}i++;delay(600);}
write_com(0x01);
}
uchar according(void)
{ uchar k;
if(data_alarm[0]==adjusted.Year&&data_alarm[1]==adjusted.Month&&data_alarm[2]==adjusted.Day&&data_alarm[3]==adjusted.Hour&&data_alarm[4]==adjusted.Minute&&data_alarm[5]==adjusted.Second)
k=1;
else k=0;
return k;
}
void speak(void)
{uint i=50;
while(i)
{speaker=0;
delay(1);
speaker=1;
delay(1);
i--;
}
}
void alarm(void)
{uint i=10;
while(i)
{
speak();
delay(10);
i--;
}
}
/**************************修改時間操作********************************/
void reset(void)
{
sec_add=0;
min_add=0;
hou_add=0;
day_add=0;
mon_add=0;
yea_add=0 ;
}
void adjust(void)
{

if(key_scan()&&key_flag1)
switch(key_value())
{case '0':sec_add++;break;
case '1':min_add++;break;
case '2':hou_add++;break;
case '3':day_add++;break;
case '4':mon_add++;break;
case '5':yea_add++;break;
case 'b':reset();break;
default: break;
}
adjusted.Second+=sec_add;
adjusted.Minute+=min_add;
adjusted.Hour+=hou_add;
adjusted.Day+=day_add;
adjusted.Month+=mon_add;
adjusted.Year+=yea_add;
if(adjusted.Second>59) adjusted.Second=adjusted.Second%60;

if(adjusted.Minute>59) adjusted.Minute=adjusted.Minute%60;

if(adjusted.Hour>23) adjusted.Hour=adjusted.Hour%24;

if(adjusted.Day>31) adjusted.Day=adjusted.Day%31;

if(adjusted.Month>12) adjusted.Month=adjusted.Month%12;

if(adjusted.Year>100) adjusted.Year=adjusted.Year%100;

}

/**************************中斷處理函數*********************************/
void changing(void) interrupt 0 using 0 //需要修改時間和日期，或者停止修改
{
if(key_flag1)key_flag1=0;
else key_flag1=1;
}
void alarming(void) interrupt 3 using 0 //需要設置鬧鈴或者停止設置
{
if(key_flag2)key_flag2=0;
else key_flag2=1;
}
/********************************主函數***********************************/
main()
{uint i;
uchar *l;
uchar p1[]="D:",p2[]="T:";
SYSTEMTIME T;
EA=1;
EX0=1;
IT0=1;
EA=1;
EX1=1;
IT1=1;
init1602();
Initial_DS1302() ;

while(1)
{ write_com(0x80);
write_string(p1,2);
write_com(0xc0);
write_string(p2,2);
DS1302_GetTime(&T) ;
adjusted.Second=T.Second;
adjusted.Minute=T.Minute;
adjusted.Hour=T.Hour;
adjusted.Week=T.Week;
adjusted.Day=T.Day;
adjusted.Month=T.Month;
adjusted.Year=T.Year;
for(i=0;i<9;i++)
{
adjusted.DateString[i]=T.DateString[i];
adjusted.TimeString[i]=T.TimeString[i];
}
adjust();
if(key_flag2)naoling();
if(according())alarm();
DateToStr(&adjusted);
TimeToStr(&adjusted);
write_com(0x82);
write_string(adjusted.DateString,8);
write_com(0xc2);
write_string(adjusted.TimeString,8);
delay(10);
}
（二）頭文件1 顯示模塊 LCD1602.H
#ifndef LCD_CHAR_1602_2009_5_9
#define LCD_CHAR_1602_2009_5_9
#define uchar unsigned char
#define uint unsigned int
sbit lcdrs = P2^0;
sbit lcdrw = P2^1;
sbit lcden = P2^2;
void delay(uint z) // 延時
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void write_com(uchar com) // 寫入指令數據到 lcd
{
lcdrw=0;
lcdrs=0;
P0=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}

void write_data(uchar date) // 寫入字元顯示數據到 lcd
{
lcdrw=0;
lcdrs=1;
P0=date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void init1602() // 初始化設定
{
lcdrw=0;
lcden=0;
write_com(0x3C);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80);
}
void write_string(uchar *pp,uint n)
{
int i;
for(i=0;i<n;i++)
write_data(pp[i]);
}
#endif
(三)頭文件2 時鍾模塊 DS1302.H
#ifndef _REAL_TIMER_DS1302_2009_5_20_
#define _REAL_TIMER_DS1302_2003_5_20_

sbit DS1302_CLK = P2^6; //實時時鍾時鍾線引腳
sbit DS1302_IO = P2^7; //實時時鍾數據線引腳
sbit DS1302_RST = P2^5; //實時時鍾復位線引腳
sbit ACC0 = ACC^0;
sbit ACC7 = ACC^7;

typedef struct SYSTEM_TIME
{
unsigned char Second;
unsigned char Minute;
unsigned char Hour;
unsigned char Week;
unsigned char Day;
unsigned char Month;
unsigned char Year;
unsigned char DateString[9]; //用這兩個字元串來放置讀取的時間
unsigned char TimeString[9];
}SYSTEMTIME; //定義的時間類型

#define AM(X) X
#define PM(X) (X+12) // 轉成24小時制
#define DS1302_SECOND 0x80
#define DS1302_MINUTE 0x82
#define DS1302_HOUR 0x84
#define DS1302_WEEK 0x8A
#define DS1302_DAY 0x86
#define DS1302_MONTH 0x88
#define DS1302_YEAR 0x8C
#define DS1302_RAM(X) (0xC0+(X)*2) //用於計算 DS1302_RAM 地址的宏

/******內部指令**********/
void DS1302InputByte(unsigned char d) //實時時鍾寫入一位元組(內部函數)
{
unsigned char i;
ACC = d;
for(i=8; i>0; i--)
{
DS1302_IO = ACC0;
DS1302_CLK = 1;
DS1302_CLK = 0;
ACC = ACC >> 1; //因為在前面已經定義了ACC0 = ACC^0;以便再次利用DS1302_IO = ACC0;
}
}

unsigned char DS1302OutputByte(void) //實時時鍾讀取一位元組(內部函數)
{
unsigned char i;
for(i=8; i>0; i--)
{
ACC = ACC >>1;
ACC7 = DS1302_IO;
DS1302_CLK = 1;
DS1302_CLK = 0;
}
return(ACC);
}
/********************************/

void Write1302(unsigned char ucAddr, unsigned char ucDa) //ucAddr: DS1302地址, ucData: 要寫的數據
{
DS1302_RST = 0;
DS1302_CLK = 0;
DS1302_RST = 1;
DS1302InputByte(ucAddr); // 地址，命令
DS1302InputByte(ucDa); // 寫1Byte數據
DS1302_CLK = 1;
DS1302_RST = 0;
}

unsigned char Read1302(unsigned char ucAddr) //讀取DS1302某地址的數據
{
unsigned char ucData;
DS1302_RST = 0;
DS1302_CLK = 0;
DS1302_RST = 1;
DS1302InputByte(ucAddr|0x01); // 地址，命令
ucData = DS1302OutputByte(); // 讀1Byte數據
DS1302_CLK = 1;
DS1302_RST = 0;
return(ucData);
}

void DS1302_SetProtect(bit flag) //是否防寫
{
if(flag)
Write1302(0x8E,0x10);
else
Write1302(0x8E,0x00);
}

void DS1302_SetTime(unsigned char Address, unsigned char Value) // 設置時間函數
{
DS1302_SetProtect(0);
Write1302(Address, ((Value/10)<<4 | (Value%10))); //將十進制數轉換為BCD碼
} //在DS1302中的與日歷、時鍾相關的寄存器存放的數據必須為BCD碼形式

void DS1302_GetTime(SYSTEMTIME *Time)
{
unsigned char ReadValue;
ReadValue = Read1302(DS1302_SECOND);
Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); //將BCD碼轉換為十進制數
ReadValue = Read1302(DS1302_MINUTE);
Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
ReadValue = Read1302(DS1302_HOUR);
Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
ReadValue = Read1302(DS1302_DAY);
Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
ReadValue = Read1302(DS1302_WEEK);
Time->Week = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
ReadValue = Read1302(DS1302_MONTH);
Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
ReadValue = Read1302(DS1302_YEAR);
Time->Year = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
}
unsigned char *DataToBCD(SYSTEMTIME *Time)
{
unsigned char D[8];
D[0]=Time->Second/10<<4+Time->Second%10;
D[1]=Time->Minute/10<<4+Time->Minute%10;
D[2]=Time->Hour/10<<4+Time->Hour%10;
D[3]=Time->Day/10<<4+Time->Day%10;
D[4]=Time->Month/10<<4+Time->Month%10;
D[5]=Time->Week/10<<4+Time->Week%10;
D[6]=Time->Year/10<<4+Time->Year%10;
return D;
}
void DateToStr(SYSTEMTIME *Time)
{
//將十進制數轉換為液晶顯示的ASCII值
Time->DateString[0] = Time->Year/10 + '0';
Time->DateString[1] = Time->Year%10 + '0';
Time->DateString[2] = '-';
Time->DateString[3] = Time->Month/10 + '0';
Time->DateString[4] = Time->Month%10 + '0';
Time->DateString[5] = '-';
Time->DateString[6] = Time->Day/10 + '0';
Time->DateString[7] = Time->Day%10 + '0';
Time->DateString[8] = '\0';
}

void TimeToStr(SYSTEMTIME *Time)
{
//將十進制數轉換為液晶顯示的ASCII值
Time->TimeString[0] = Time->Hour/10 + '0';
Time->TimeString[1] = Time->Hour%10 + '0';
Time->TimeString[2] = ':';
Time->TimeString[3] = Time->Minute/10 + '0';
Time->TimeString[4] = Time->Minute%10 + '0';
Time->TimeString[5] = ':';
Time->TimeString[6] = Time->Second/10 + '0';
Time->TimeString[7] = Time->Second%10 + '0';
Time->DateString[8] = '\0';
}
void Initial_DS1302(void)
{
unsigned char Second;
Second=Read1302(DS1302_SECOND);
if(Second&0x80) //初始化時間
DS1302_SetTime(DS1302_SECOND,0);
}
void DS1302_TimeStop(bit flag) // 是否將時鍾停止
{
unsigned char Data;
Data=Read1302(DS1302_SECOND);
DS1302_SetProtect(0);
if(flag)
Write1302(DS1302_SECOND, Data|0x80);
else
Write1302(DS1302_SECOND, Data&0x7F);
}
#endif

④ 求51單片機日歷/時鍾設計

10分求這么多？？？
嘿嘿。。。
有點困難哦。。
網上有常式的。
看看。。。
81708034 加我，有不明白的地方我可以告訴你。

⑤ 基於51單片機的電子日歷，DS1302接了晶振了，那麼單片機還需要接晶振嗎

DS1302 接的 32.768K 晶振是為 DS1302 提供標准時鍾源的，跟單片機無關。
至於單片機需根據實際情況需要使用或不使用晶振。
例如有些 STC 單片機可使用內置幾M的RC震盪器，這種情況可以取消單片機的晶振。

⑥ 用51單片機做日歷時鍾 【軟體模擬】

首先確定方案，既然用51單片機首先先構造一個最小系統，然後再最小系統的基礎上構建外圍電路，既然是時鍾，就要有顯示電路，顯示你可以用LED或是LCD，如果你要做特別精確地時鍾，建議使用時鍾晶元，要是不是也別嚴格可以用單片機的定時器，再下來就可以考慮電子時鍾的一些功能，比如時間設定，這就需要按鍵了，個人的理解啊，

⑦ 51單片機製做日歷

看看這個程序嘛，，雖然沒有你要得年月日，但是有時間得啊。。。可以藉此來點靈感。。我也在做這個東西。。。我還在收集資料啊。。。共同學習。。
;採用8位LED軟體解碼動態顯示程序
;使用AT89C51單片機,12MHZ晶振,P0輸出欄位碼,P2口輸出位選碼,用共陽
;LED數碼管,P1.0為調時位選擇按鍵,P1.1為加1鍵,P1.2為減1鍵。
;片內RAM的70H到77H單元為LED數碼管的顯示緩沖區
;78H,79H,7AH分別為秒、分、小時計數單元
;7BH為50ms計數器,7CH為調時按鍵計數器

ORG 0000H
LJMP START
ORG 000BH ;定時器/計數器T0中斷程序入口
LJMP INTT0

;主程序
START:MOV R0,#70H
MOV R7,#0CH
INIT: MOV @R0,#00H
INC R0
DJNZ R7,INIT
MOV 72H,#10
MOV 75H,#10

MOV TMOD,#01H
MOV TL0,#0B0H
MOV TH0,#03CH
SETB EA
SETB ET0
SETB TR0
START1: LCALL SCAN
LCALL KEYSCAN
SJMP START1
;延時1MS子程序
DL1MS: MOV R6,#14H
DL1: MOV R7,#19H
DL2: DJNZ R7,DL2
DJNZ R6,DL1
RET
;延時20MS子程序
DL20MS: ACALL SCAN
ACALL SCAN
ACALL SCAN
RET
;數碼管顯示程序
SCAN: MOV A,78H ;時間存入顯示緩沖區相應位置
MOV B,#0AH
DIV AB
MOV 71H,A
MOV 70H,B
MOV A,79H
MOV B,#0AH
DIV AB
MOV 74H,A
MOV 73H,B
MOV A,7AH
MOV B,#0AH
DIV AB
MOV 77H,A
MOV 76H,B
MOV R1,#70H ;循環掃描顯示
MOV R5,#80H
MOV R3,#08H
SCAN1: MOV A,R5
MOV P2,A
MOV A,@R1
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
MOV A,R5
LCALL DL1MS
INC R1
MOV A,R5
RR A
MOV R5,A
DJNZ R3,SCAN1
MOV P2,#00H
MOV P0,#0FFH
RET
TAB:DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H,0BFH
;「0~9」,「-」的共陽極欄位碼

;定時器/計數器T0中斷服務程序
INTT0: PUSH ACC
PUSH PSW
CLR ET0
CLR TR0
MOV TL0,#0B0H
MOV TH0,#03CH
SETB TR0
INC 7BH
MOV A,7BH
CJNE A,#14H,OUTT0
MOV 7BH,#00
INC 78H
MOV A,78H
CJNE A,#3CH,OUTT0
MOV 78H,#00
INC 79H
MOV A,79H
CJNE A,#3CH,OUTT0
MOV 79H,#00
INC 7AH
MOV A,7AH
CJNE A,#18H,OUTT0
MOV 7AH,#00
OUTT0:
SETB ET0
pop psw
pop acc
RETI
;按鍵處理程序
KEYSCAN: CLR EA
JNB P1.0,KEYSCAN0
JNB P1.1,KEYSCAN1
JNB P1.2,KEYSCAN2
KEYOUT: SETB EA
RET
KEYSCAN0: LCALL DL20MS
JB P1.0,KEYOUT
WAIT0: JNB P1.0,WAIT0
INC 7CH
MOV A,7CH
CLR TR0
CLR ET0
CJNE A,#03H,KEYOUT
MOV 7CH,#00
SETB TR0
SETB ET0
SJMP KEYOUT
KEYSCAN1: LCALL DL20MS
JB P1.1,KEYOUT
WAIT1: JNB P1.1,WAIT1
MOV A,7CH
CJNE A,#02H,KSCAN11
INC 79H
MOV A,79H
CJNE A,#3CH,KEYOUT
MOV 79H,#00
SJMP KEYOUT
KSCAN11: INC 7AH
MOV A,7AH
CJNE A,#18H,KEYOUT
MOV 7AH,#00
SJMP KEYOUT
KEYSCAN2: LCALL DL20MS
JB P1.2,KEYOUT
WAIT2: JNB P1.2,WAIT2
MOV A,7CH
CJNE A,#02H,KSCAN21
DEC 79H
MOV A,79H
CJNE A,#0FFH,KEYOUT
MOV 79H,#3BH
SJMP KEYOUT
KSCAN21: DEC 7AH
MOV A,7AH
CJNE A,#0FFH,KEYOUT
MOV 7AH,#17H
SJMP KEYOUT
END

⑧ C51單片機的萬年歷程序設計

我這有個數碼管顯示的程序
以前做的，。。
你可以在我這個程序上修改修改
包括鍵盤掃描，還有動態顯示
。
。

【。。。】
#include
//常量參數
#define TMODW 0x01;
#define SCONW 0x00;
#define xplay 0x04;//顯示分頻系數
//顯示位選
unsigned char data stb;
//鍵值緩存,0xFF無鍵命令
unsigned char data keynum;
//顯示字型變數
unsigned char data play[8];
//工作參數
unsigned char data l,m;
//字型碼
unsigned char code BCDPC[10]=
{0x3F,0x06,0x5B,0x4F,0x66,
0x6D,0x7D,0x07,0x7F,0x6F};
//字位碼
unsigned char code STBCODE[8]=
{0x01,0x02,0x04,0x08,
0x10,0x20,0x40,0x80 };
//400Hz xplay分頻計數
unsigned char data cttime;
//時鍾參數
unsigned char data hr,min,sec,sec100;
//調整時鍾參數（時鍾「走」）
void ct1()
{sec100++;
if (sec100==100)
{sec100=0;sec++;
if (sec==60)
{sec=0;min++;
if (min==60)
{min=0;hr++;
if (hr==24) hr=0;
}
}
}
}
//時鍾參數→LED 顯示緩存7段參數轉換函數；
void xcplay()
{play[0]=BCDPC[hr/10];
play[1]=BCDPC[hr%10];
play[2]=BCDPC[min/10];
play[3]=BCDPC[min%10];
play[4]=BCDPC[sec/10];
play[5]=BCDPC[sec%10];
play[6]=BCDPC[sec100/10];
play[7]=BCDPC[sec100%10];
}
//顯示掃描
void cplay()
{T0=1;//T0－高電平消隱
T1=0;//T1－低電平準備發脈沖前沿
TI=0;//？
P1=0;//？
SBUF=STBCODE[stb];
while (TI==0)
{
};
TI=0;
SBUF=play[stb];
while (TI==0)
{
};
T1=1;
T0=0;
stb=++stb&0x07;
}

extern void cthl0();
//定時器0中斷處理程序
void ct0(void) interrupt 1 using 1
{cthl0();
cttime--;
if (cttime==0)
{cttime=xplay;
ct1();//調用時鍾「走」函數
xcplay();//調用時鍾參數→Led顯示緩存轉換函數
};
cplay();
}
void w20ms()
{for (l=0;l<41;l++)
{for (m=0;m<81;m++)
{
}
}
}
void tkey()
{P1=0xF0;
keynum=0xFF;
if (P1!=0xF0)
{w20ms();
P1=0xF0;
if (P1!=0xF0)
{P1=0xFE;
switch (P1)
{case 0xEE:keynum=0;break;
case 0xDE:keynum=1;break;
case 0xBE:keynum=2;break;
case 0x7E:keynum=3;break;
}
P1=0xFD;
switch (P1)
{case 0xED:keynum=4;break;
case 0xDD:keynum=5;break;
case 0xBD:keynum=6;break;
case 0x7B:keynum=7;break;
}
P1=0xFB;
switch (P1)
{
case 0xEB:keynum=8;break;
}
};
};
P1=0x00;
}
void command()
{switch (keynum)
{
case 0:{hr=hr+1;
if (hr==24)
hr=0;
}
break;

case 1:{min=min+1;
if (min==60)
min=0;
}
break;

case 2:{sec=sec+1;
if (sec==60)
sec=0;
}
break;

case 3:{sec100=0;
}
break;

case 4:{
while(!(P1=0xED))
{
hr=0;
min=0;
sec=0;
}
}
break;

case 5:{hr=hr-1;
if (hr==00)
hr=24;
}
break;
case 6:{min=min-1;
if (min==00)
min=59;
}
break;

case 7:{sec=sec-1;
if (sec==00)
sec=0;
}
break;

case 0xFF:break;
}
keynum=0xFF;
}
main ()
{ hr=8;
min=5;
sec=8;
sec100=0;
TMOD=TMODW;
SCON=SCONW;
ET0=1;
TR0=1;
EA=1;
cttime=xplay;
while (1)
{w20ms();
tkey();
command();

};
}

⑨ 51單片機做的萬年歷有必要加看門狗嗎

沒必要，基本沒什麼干擾，單片機不會死機的。
但是如果你的系統里設置了某些需要保存的數據，比如定時鬧鍾什麼的，需要保存起來而且掉電不丟失，這時你可能需要一個外置的EEPROM，而看門狗晶元往往也有EEPROM功能，這時可以加一個，一舉兩得。