2.其中定时用了两种方法。一种是用取消息。另一种是延时队列。这里只使用了取消息的方法。延时队列由于我机器上是vc6.0，CreateTimerQueue在本人机器上无法使用，需要新的sdk，所以没有加以验证，但取消息的方式是可行的。
3.稍稍验证了下，基本满足要求。
-------------------------------------------
程序如下：
// DigitalClock.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <windows.h>
#include <winbase.h>
typedef struct _st_time{
int hour
int min
int sec
}ST_TIME
ST_TIME g_Time // The struct contain the hour,min and sec.
HANDLE g_hStdout //
WORD g_cxCenter, g_cyCenter // Center of the screen.
HANDLE g_DoneEvent// The program could be over.
BOOL g_ThreadTerminated // The Thread should be terminated.
#define SECOND_CIRCLE 60
#define MINUTE_CIRCLE 60
#define HOUR_CIRCLE 24
void TimeIncreaseSecond(ST_TIME &st)
{
st.sec ++
if (st.sec >= SECOND_CIRCLE)
{
st.sec -= SECOND_CIRCLE
st.min++
if (st.min >= MINUTE_CIRCLE)
{
st.min -= MINUTE_CIRCLE
st.hour++
if (st.hour >= HOUR_CIRCLE)
{
st.hour -= HOUR_CIRCLE
}
}
}
}
void PrintTimeToScreen(HANDLE hStdout, short cxCenter, short cyCenter, ST_TIME st)
{
char buf[64] = {0}
COORD crdPos
// make it format to output.
sprintf (buf, "%02d:%02d:%02d", st.hour, st.min, st.sec)
crdPos.X = cxCenter - 4
crdPos.Y = cyCenter
SetConsoleCursorPosition(hStdout, crdPos)
printf(buf)
}
#ifdef USE_TIMERQUEUE
// if we use the timer queue function.
// Its procdure is in this.
void CALLBACK TimerRoutine (LPVOID lpParam, BOOL TimerOrWaitFired)
{
if (lpParam == NULL)
{
printf ("NULL parameters.\n")
}
else
{
ST_TIME *st = (ST_TIME *)lpParam
TimeIncreaseSecond(st)
PrintTimeToScreen(g_hStdout, g_cxCenter, g_cyCenter, *st)
}
}
#else
DWORD WINAPI TimerThreadProc(LPVOID lpParam)
{
#define ID_TIMER_SECOND 1
MSG msg
BOOL ret
ST_TIME *st = (ST_TIME *)lpParam
SetTimer(NULL, ID_TIMER_SECOND, 1000, NULL)
PeekMessage(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE)
while (!g_ThreadTerminated &&(ret = GetMessage (&msg, NULL, 0, 0)) != 0)
{
if (ret == -1)
{
//process fatal event.
}
else if (msg.message == WM_TIMER)
{
TimeIncreaseSecond(*st)
PrintTimeToScreen(g_hStdout, g_cxCenter, g_cyCenter, *st)
}
else
{
TranslateMessage (&msg)
DispatchMessage (&msg)
}
}
return 1
}
#endif
// If the ctrl+break combined key pressed. call this function.
// It set the g_DoneEvent. this terminate the program.
BOOL WINAPI CtrlHandler(DWORD fdwCtrlType)
{
switch (fdwCtrlType)
{
case CTRL_BREAK_EVENT:
// Terminate the program.
printf ("Terminate.\n")
SetEvent(g_DoneEvent)
return TRUE
default:
return FALSE
}
}
BOOL InitApplication()
{
// Get the stdin and stdout handle.
HANDLE hStdIn
hStdIn = GetStdHandle(STD_INPUT_HANDLE)
if (hStdIn == INVALID_HANDLE_VALUE)
return FALSE
g_hStdout = GetStdHandle(STD_OUTPUT_HANDLE)
// Set the mode, make the input echo.
DWORD fOldMode
GetConsoleMode(hStdIn, &fOldMode)
fOldMode |= ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT
SetConsoleMode(hStdIn, fOldMode)
// Set the window buffer.
// make a line 40 columns.
CONSOLE_SCREEN_BUFFER_INFO csbiInfo
GetConsoleScreenBufferInfo(g_hStdout, &csbiInfo)
csbiInfo.srWindow.Right = 40
// get the center point.
g_cxCenter = csbiInfo.srWindow.Right / 2
g_cyCenter = csbiInfo.srWindow.Bottom / 2
// Set the window.
SetConsoleWindowInfo(g_hStdout, TRUE, &csbiInfo.srWindow)
return TRUE
}
BOOL PrintTheInitalStateAndGetInput(HANDLE hStdout, WORD cxCenter, WORD cyCenter, ST_TIME &time)
{
#define GAPS_LEFT_COLON (-2)
#define GAPS_RIGHT_COLON (1)
#define GAPS_LEFT_UNDERLINE_START (-4)
#define GAPS_MIDDLE_UNDERLINE_START (-1)
#define GAPS_RIGHT_UNDERLINE_START (2)
// __:__:__
// So the left ":" center -2
// so the right ":" center + 1
// so the left "_" center - 4
// so the lfet "_" center - 1
// so the right "_" center + 2
COORD crdPos
crdPos.X = cxCenter + GAPS_LEFT_COLON
crdPos.Y = cyCenter
SetConsoleCursorPosition(hStdout, crdPos)
printf (":")
crdPos.X = cxCenter + GAPS_RIGHT_COLON
SetConsoleCursorPosition(hStdout, crdPos)
printf (":")
crdPos.X = cxCenter + GAPS_LEFT_UNDERLINE_START
SetConsoleCursorPosition(hStdout, crdPos)
scanf ("%d", &time.hour)
crdPos.X = cxCenter + GAPS_MIDDLE_UNDERLINE_START
SetConsoleCursorPosition(hStdout, crdPos)
scanf ("%d", &time.min)
crdPos.X = cxCenter + GAPS_RIGHT_UNDERLINE_START
SetConsoleCursorPosition(hStdout, crdPos)
scanf ("%d", &time.sec)
if (time.hour <0 || time.hour >HOUR_CIRCLE ||
time.min <0 || time.min >MINUTE_CIRCLE ||
time.sec <0 || time.sec >SECOND_CIRCLE)
return FALSE
return TRUE
}
int main(int argc, char* argv[])
{
InitApplication()
PrintTheInitalStateAndGetInput(g_hStdout, g_cxCenter, g_cyCenter, g_Time)
// create a event to tell the program to terminate.
g_DoneEvent = CreateEvent(NULL, TRUE, FALSE, NULL)
#ifdef USE_TIMERQUEUE
HANDLE hTimerQueue, hTimer
hTimerQueue = CreateTimerQueue()
if (!CreateTimerQueueTimer(&hTimer,
hTimerQueue, TimerRoutine, &g_Time, 1000, 0, 0))
{
printf("CreateTimerQueueTimer failed (%d)\\n", GetLastError())
return 3
}
#else
// create the thread.
HANDLE hThreadTimer
DWORD dwThreadId
g_ThreadTerminated = FALSE
hThreadTimer = CreateThread(NULL, 0,
TimerThreadProc, &g_Time, 0, &dwThreadId)
if (hThreadTimer == NULL)
{
}
#endif
SetConsoleCtrlHandler(CtrlHandler, TRUE)
if (WaitForSingleObject(g_DoneEvent, INFINITE) != WAIT_OBJECT_0)
printf("WaitForSingleObject failed (%d)\\n", GetLastError())
#ifdef USE_TIMERQUEUE
if (!DeleteTimerQueue(hTimerQueue))
printf("DeleteTimerQueue failed(%d) \\n", GetLastError())
#else
g_ThreadTerminated = TRUE
if (WaitForSingleObject(hThreadTimer, INFINITE) != WAIT_OBJECT_0)
printf("WaitForSingleObject failed (%d)\\n", GetLastError())
#endif
return 0
}
--------------------------------------------
下面是纯c的。
有几个问题：
1.textmode函数在turboc中没有办法使用，不知道是什么问题，而borland c就可以。
2.无论怎么设置，自己的ctrlbreak函数在上述两个环境中都不能被调用，非常遗憾。所以不能够优雅的退出。只能按两次ctrlbreak。
下面是程序。
------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <dos.h>
#define ABORT 0
int jump_out_loop = -1
int jump_out(void)
{
jump_out_loop = 1
printf("Abort ..\n")
return ABORT
}
int main(void)
{
struct text_info ti
int center_x, center_y
int hour, min, sec
char str_out[64] = {0}
clrscr()
/*textmode(BW40)*/
/*textmode在turbo c下设置会出问题*/
gettextinfo(&ti)
center_x = ti.winright / 2
center_y = ti.winbottom / 2
gotoxy(center_x - 4, center_y)
cprintf(" : : ")
gotoxy(center_x - 4, center_y)
cscanf("%d", &hour)
gotoxy(center_x - 1, center_y)
cscanf("%d", &min)
gotoxy(center_x + 2, center_y)
cscanf("%d", &sec)
/* check input valid or not */
{}
setcbrk(1)
ctrlbrk(jump_out)
/*jump_out没有起到作用,实在不好意思.*/
/*
if (getcbrk())
printf("crtl break is on\n")
else
printf("is off\n")
*/
while (1)
{
delay(1000)
sec++
if (sec >= 60)
{
sec -= 60
min++
if (min >= 60)
{
min -= 60
hour++
if (hour >= 24)
{
hour -= 24
}
}
}
sprintf(str_out, "%02d:%02d:%02d", hour, min, sec)
gotoxy(center_x - 4, center_y)
cprintf(str_out)
}
/* getch()*/
return 0
}
//=======主函数==================================ORG 0000H
LJMP MAIN
ORG000BH
LJMP T00
//ORG001BH
//LJMP T11
ORG 0030H
//=======程序初始化=============================
MAIN:
MOV TMOD,#11H
MOV TH0,#3CH
MOV TL0,#0B0H
MOV TH1,#0F0H
MOV TL1,#0B0H
SETB EA
SETB ET0
// SETB ET1
SETB TR0
// SETB TR1
CLR P3.4
MOV R7,#00H 秒值
MOV 30H,#00H 秒个位值
MOV 31H,#00H 秒十位值
MOV 32H,#00H 分个位
MOV 33H,#00H 分十位
MOV 34H,#00H 时个位
MOV 35H,#00H 时十位
MOV 44H,#00H 秒表毫秒十位
MOV 45H,#00H 秒表秒毫秒百位
MOV 46H,#00H 秒表秒个位
MOV 47H,#00H 秒表秒十位
MOV 48H,#00H 秒表分个位
MOV 49H,#00H 秒表分十位
MOV P2,#0F0H P2口按键初始化
MOV 40H,#01H 数码管休眠值 /流水灯/秒表开关数
MOV 41H,#08H 流水灯循环值
MOV 42H,#00H 秒表暂停
// ACALL T11
//-----------------------------------------------
MAIN1:
MOV P0,#0FFH
MOV P1,#0FFH
MOV R0,40H
CJNE R0,#01H,ACL1
ACALL MAIN2时钟显示
ACL1:CJNE R0,#02H,ACL2
ACALL MAIN3秒表
ACL2:CJNE R0,#03H,ACL3
ACALL LED流水灯
ACL3:ACALL KEY 按键扫描
// ACALL BAO定时报警
LJMP MAIN1
//=======报警子程序============================
BAO:MOV R4,33H
CJNE R4,#03H,YY1
CLR P3.2
ACALL KEY
LJMP YY2
YY1:CJNE R4,#05H,YY2
SETB P3.2
ACALL KEY
YY2:RET
//======时钟扫描子程序=======================
MAIN2:
MOV A,30H
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
CLR P1.0
ACALL DELAY
MOV A,31H
MOV DPTR,#TAB
MOVC A,@A+ DPTR
MOV P0,A
CLR P1.1
SETB P1.0
ACALL DELAY
MOV A,32H
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
CLR P1.2
SETB P1.1
ACALL DELAY
MOV A,33H
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
CLR P1.3
SETB P1.2
ACALL DELAY
MOV A,34H
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
CLR P1.4
SETB P1.3
ACALL DELAY
MOV A,35H
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
CLR P1.5
SETB P1.4
ACALL DELAY
MOV P0,#7FH
MOV P1,#0EBH
ACALL DELAY
MOV P1,#0FFH
RET
//========秒表扫描子程序=========================
MAIN3:
MOV A,44H
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
CLR P1.0
ACALL DELAY
MOV A,45H
MOV DPTR,#TAB
MOVC A,@A+ DPTR
MOV P0,A
CLR P1.1
SETB P1.0
ACALL DELAY
MOV A,46H
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
CLR P1.2
SETB P1.1
ACALL DELAY
MOV A,47H
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
CLR P1.3
SETB P1.2
ACALL DELAY
MOV A,48H
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
CLR P1.4
SETB P1.3
ACALL DELAY
MOV A,49H
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
CLR P1.5
SETB P1.4
ACALL DELAY
MOV P0,#7FH
MOV P1,#0EBH
ACALL DELAY
MOV P1,#0FFH
RET
//=======定时器T0中断服务========================
T00:MOV TH0,#0D8H
MOV TL0,#0F0H
INC R7
CJNE R7,#64H,AA
MOV R7,#00H
//-------时钟跑值--------------------------------
TK1:INC 30H 每秒钟秒个位增一
MOV R6,30H
CJNE R6,#0AH,AA
MOV 30H,#00H
TK2:INC 31H
MOV R6,31H
CJNE R6,#06H,AA
MOV 31H,#00H
TK3:INC 32H
MOVR6,32H
CJNE R6,#0AH,AA
MOV32H,#00H
TK4:INC33H
MOVR6,33H
CJNE R6,#06H,AA
MOV33H,#00H
TK5:INC34H
MOVR5,34H
MOVR6,35H
CJNE R5,#04H,TK6
CJNE R6,#02H,TK6
MOV34H,#00H
MOV35H,#00H
TK6:CJNE R5,#0AH,AA
MOV34H,#00H
INC35H
//-------秒表跑值----------------------
AA:
MOV R5,42H
CJNE R5,#01H,TK7
INC 44H
TK7:MOV R5,44H
CJNE R5,#0AH,AA1
MOV 44H,#00H
INC 45H
MOV R5,45H
CJNE R5,#0AH,AA1
MOV 45H,#00H
INC 46H
MOV R5,46H
CJNE R5,#0AH,AA1
MOV 46H,#00H
INC 47H
MOV R5,47H
CJNE R5,#06H,AA1
MOV 47H,#00H
INC 48H
MOV R5,48H
CJNE R5,#0AH,AA1
MOV 48H,#00H
INC 49H
MOV R5,49H
CJNE R5,#06H,AA1
MOV 49H,#00H
AA1:RETI
//====定时器T1中断服务子程序====================
//T11:MOV TH1,#0F0H
// MOV TL1,#0B0H
// RETI
//******定时时间调整子程序*************************//
TBAO:
MOV 50H,#00H
MOV 51H,#00H
MOV 52H,#00H
MOV 53H,#00H
MOV 54H,#00H
MOV 55H,#00H
MOV R3,50H
DJNZ 30H,RET1
RET1: RET
//======键盘扫描子程序==========================
KEY:MOV P2,#0F0H
MOV R3,P2
CJNE R3,#0F0H,KE0
LJMP KK13
KE0:CJNE R3,#0E0H,KE1 P2.4行
MOV P2,#0EFH
JB P2.3,KK1 //用作调定时时间 K13 秒个位增一
ACALL DELAY1
ACALL TK1
KK1:JB P2.2,KK2 K14 秒十增一
ACALL DELAY1
ACALL TK2
KK2:JB P2.1,KK3 K15 分个位增一
ACALL DELAY1
ACALL TK3
KK3:JB P2.0,KE1 K16 分十位增一
ACALL DELAY1
ACALL TK4
KE1:MOV P2,#0DFH P2.5行
JB P2.3,KK4 K9 时个位增一
ACALL DELAY1
ACALL TK5
KK4:JB P2.2,KK5 K10 时十位增一
ACALL DELAY1
INC 35H
MOV R3,35H
CJNE R3,#03H,HH0
MOV 35H,#00H
LJMP KK5
HH0:CJNE R3,#02H,HH1
LJMP KK5
HH1:CJNE R3,#01H,HH2
LJMP KK5
HH2:MOV 35H,#00H
KK5:JB P2.1,KK6
ACALL DELAY1 K11开/关蜂鸣器
CPL P3.2
KK6:JB P2.0,KE2 K12 秒表暂停
MOV 42H,#00H
KE2:MOV P2,#0BFH P.6行
JB P2.3,KK7K5 时钟暂停/取消暂停
ACALL DELAY1
CPL ET0
KK7:JB P2.2,KK8 K6 显示/休眠/流水灯
ACALL DELAY2
INC 40H
MOV R3,40H
CJNE R3,#04H,KK8
MOV 40H,#01H
KK8:JB P2.1,KK9
// ACALL DELAY3 K7 秒表清0
MOV 44H,#00H
MOV 45H,#00H
MOV 46H,#00H
MOV 47H,#00H
MOV 48H,#00H
MOV 49H,#00H
KK9:JB P2.0,KE3 K8 秒表开始跑
MOV 42H,#01H
KE3:MOV P2,#7FH P2.7行
JB P2.3,KK10 K1 秒十位减一
ACALL DELAY1
MOV R3,31H
CJNE R3,#00H,JA1
LJMP KK10
JA1:DEC 31H
KK10:JB P2.2,KK11K2分个位减一
ACALL DELAY1
MOV R3,32H
CJNE R3,#00H,JA2
LJMP KK11
JA2: DEC 32H
KK11:JB P2.1,KK12 K3 分十位减一
ACALL DELAY1
MOV R3,33H
CJNE R3,#00H,JA3
LJMP KK12
JA3:DEC 33H
KK12:JB P2.0,KK13 K4 时个位减一
ACALL DELAY1
MOV R3,34H
CJNE R3,#00H,JA4
LJMP KK13
JA4:DEC 34H
KK13:RET
//=====流水灯子程序===========================
LED: MOV A,#0feH
MOV 41H,#08H
MOV P0,#0FFH
LED1:
MOV P1,A
MOV R3,#100
D0: ACALL DELAY
DJNZ R3,D0
MOV R3,41H
DJNZ R3,AAA
LJMP BB
AAA:RL A
MOV 41H,R3
ACALL KEY
LJMP LED1
BB:
MOV 41H,#07H
CC: MOV P1,A
MOV R3,#30
D1: ACALL DELAY
DJNZ R3,D1
MOV R3,41H
DJNZ R3,DD
LJMP LED0
DD:RR A
MOV 41H,R3
ACALL KEY
LJMP CC
LED0:RET
//=====延时子程序==============================
DELAY:MOV R1,#250
DEL1:NOP
NOP
NOP
NOP
DJNZ R1,DEL1
RET
//====调用时钟显示作延时========================
DELAY1:MOV R2,#20
DELA3: ACALL MAIN2
DJNZ R2,DELA3
RET
//====调用秒表显示作延时========================
DELAY3:MOV R2,#20
DELA5:ACALL MAIN3
DJNZ R2,DELA5
RET
//====调用延时子程序作延时======================
DELAY2:MOV R2,#100
DELA4:ACALL DELAY
DJNZ R2,DELA4
RET
//======共阳数码管段码表=================================
TAB:DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H,87H
END
怎么把墙上挂的数字电子钟设置成24小时数字电子钟设置成24小时制的 *** 作方法如下：
按下复位键即可将数码电子钟设置成24小时制，按下上调键3秒种左右，此时可以进行12/24小时制的切换。
希望我的回答能够帮助到您哦。
基于单片机的数字电子钟的电路设计```电路图在我空间相册
:hi.baidu./dsu5566/album/%B5%E7%C2%B7%CD%BC
oo
LED数字电子钟的时上面的数字2.5.6显示不完全，是为什么？找一下256正确宣示都亮的段，对比你的256那段没有宣示出来出来。应该就是那一段的引脚短路或者短路啦。。。
急求数字电子钟逻辑电路设计呵呵。我没有做过这个。要现在做。得花时间，不好意思。如果我有现成的。我肯定给你。急求数字电子钟逻辑电路设计
数字电子钟对人体有辐射吗？一点都没有，里面就是那么几个零件做的，没高压没高频，说白了，就是没有产生辐射的条件。除非你的东西外壳是铀做的（根本不可能）
数字电子钟的基本功能及用途
基本功能：时间显示，在制作的过程中，你也会学到许多关于数字电路的知识，比如：计数器，译码器等。如果你是基于单片机的，是一个很好的单片机练习课题。
单片机设计数字电子钟的程序00h
ajmp start
03h
ajmp jia
0bh
ajmp saomiao
13h
ajmp jian
1bh
ajmp jishu
2bh
start:
mov ie,#10001111b
mov ip,#00000010b
mov tmod,#00100010b
mov th1,#6
mov tl1,#6
mov th0,#88h
mov tl0,#88h
setb it1
setb it0
mov r4,#11111110b
mov sp,#30h
mov 20h,#00h
mov p3,#0ffh
mov r0,#00h
mov r1,#00h
mov r2,#00h
mov r3,#00h
mov r5,#00h
mov dptr,#table
setb tr1
setb tr0
loop:
mov a,r0
mov b,#40
div ab
jz chuli
mov r0,#00h
inc r5
mov a,r5
mov b,#100
div ab
jz chuli
cpl 20h.7
mov r5,#00h
inc r1
mov a,r1
cpl a
mov p2,a
cpl a
mov b,#60
div ab
jz chuli
mov r1,#00h
inc r2
mov a,r2
mov b,#60
div ab
jz chuli
mov r2,#00h
inc r3
mov a,r3
mov b,#24
div ab
jz chuli
mov r3,#00h
chuli:
mov a,r2
mov b,#10
div ab
mov 10h,b
mov 11h,a
mov a,r3
mov b,#10
div ab
mov 12h,b
mov 13h,a
jb p3.4,loop
mov r1,#00h
mov 87h,#01h
ljmp loop
jia:
push a
inc r2
mov a,r2
mov b,#60
div ab
jz next1
mov r2,#00h
next1:
lcall ys
clr ie0
pop a
reti
jian:
push a
inc r3
mov a,r3
mov b,#24
div ab
jz next2
mov r3,#00h
next2:
lcall ys
clr ie1
pop a
reti
jishu:
inc r0
reti
saomiao:
push a
mov a,r4
rl a
mov p0,#0ffh
d0:
cjne a,#11111110b,d1
mov p1,a
mov r4,a
mov a,11h
jnz zc
mov a,r4
rl a
mov p1,a
zc:
mov a,10h
movc a,@a+dptr
mov p0,a
sjmp over
d1:
cjne a,#11111101b,d2
mov p1,a
mov r4,a
mov a,11h
jz over
movc a,@a+dptr
mov p0,a
sjmp over
d2:
cjne a,#11111011b,d3
mov p1,a
mov r4,a
mov a,12h
movc a,@a+dptr
mov p0,a
mov c,20h.7
mov p0.7,c
sjmp over
d3:
cjne a,#11110111b,d4
mov p1,a
mov r4,a
mov a,13h
jz over
movc a,@a+dptr
mov p0,a
sjmp over
d4:
mov a,#11111110b
ajmp d0
over:
pop a
reti
ys:
mov 14h,#0ffh
a0:
mov 15h,#0ffh
a1:
djnz 15h,a1
djnz 14h,a0
ret
table:
db 0c0h
db 0f9h
db 0a4h
db 0b0h
db 099h
db 092h
db 082h
db 0f8h
db 080h
db 090h
end
数字电子钟的秒为什么到9就进位数字9是显示的，过了一秒再进位，中间一共过了10秒钟啊。
双日历数字电子钟的设计---毕业论文到中国知网论文数据库找，论文多，而且质量高。自己懒得找，可以去淘宝的（翰林书店）店铺看看，店主应该能帮你下载到这论文的
能用电子手表机芯扩展成数字电子钟吗电子手表和数字电子钟，只是大小不一样，其功能都是大同小异的。
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