电子时钟毕业论文程序

"幸福校园"有不少形式的论文范文，参考一下吧，希望对你可以有所帮助。引言随着科技的进步和社会的发展，单片机技术以迅猛的速度向前发展，它的应用已经渗透到社会的各个领域，本人设计的数字钟是利用单片机做核心元件配合周边电路实现数字钟的功能。下面分别介绍我们的硬件与软件，因为硬件是基础，所以我们先介绍硬件，然后再介绍软件。由于硬件比较实在，所以介绍的就少点了，软件介绍的比较多。然后由于是第一次编这么大的程序，肯定会有很读错误和不足之处，还望老师多多指正修改。第一章 系统分析数字电子钟的设计方法有多种，可用中小规模集成电路组成电子钟；也可以利用专用的电子钟芯片配以显示电路及其所需要的外围电路组成电子钟；还可以利用单片机来实现电子钟等等。这些方法都各有优点。利用单片机实现的电子钟具有编程灵活，便于电子钟功能的随时扩充，即可用该电子钟发出各种控制信号，精确度高等特点。

1.这是用windows api写的程序。所以要求是纯c的话就没有办法了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，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：// : Defines the entry point for the console application.//#include ""#include <>#include <>typedef struct _st_time{ int hour; int min; int sec;}ST_TIME;ST_TIME g_Time; // The struct contain the hour,min and g_hStdout; // WORD g_cxCenter, g_cyCenter; // Center of the g_DoneEvent; // The program could be g_ThreadTerminated; // The Thread should be terminated.#define SECOND_CIRCLE 60#define MINUTE_CIRCLE 60#define HOUR_CIRCLE 24void TimeIncreaseSecond(ST_TIME & st){ ++; if ( >= SECOND_CIRCLE) { -= SECOND_CIRCLE; ; if ( >= MINUTE_CIRCLE) { -= MINUTE_CIRCLE; ; if ( >= HOUR_CIRCLE) { -= 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", , , ); = cxCenter - 4; = cyCenter; SetConsoleCursorPosition(hStdout, crdPos); printf(buf); }#ifdef USE_TIMERQUEUE // if we use the timer queue function.// Its procdure is in 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); }}#elseDWORD 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 ( == 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 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); = 40; // get the center point. g_cxCenter = / 2; g_cyCenter = / 2; // Set the window. SetConsoleWindowInfo(g_hStdout, TRUE, &); 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; = cxCenter + GAPS_LEFT_COLON; = cyCenter; SetConsoleCursorPosition(hStdout, crdPos); printf (":"); = cxCenter + GAPS_RIGHT_COLON; SetConsoleCursorPosition(hStdout, crdPos); printf (":"); = cxCenter + GAPS_LEFT_UNDERLINE_START; SetConsoleCursorPosition(hStdout, crdPos); scanf ("%d", &); = cxCenter + GAPS_MIDDLE_UNDERLINE_START; SetConsoleCursorPosition(hStdout, crdPos); scanf ("%d", &); = cxCenter + GAPS_RIGHT_UNDERLINE_START; SetConsoleCursorPosition(hStdout, crdPos); scanf ("%d", &); if ( < 0 || > HOUR_CIRCLE || < 0 || > MINUTE_CIRCLE || < 0 || > 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：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 <>#include <>#include <>#include <>#include <>#define ABORT 0int 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 = / 2; center_y = / 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;}

下面有了！！！！