Code

alarmClock.c

#include <reg51.h>

/* 
 * Author: Fish__404
 * 51单片机简易时钟
 */

#define uint unsigned int
#define uchar unsigned char
#define DIG 6
#define COL 3

/* 独立按键定义 */
sbit KEY_SURE = P3^2;	// 确认键/关闭闹钟键/清零
sbit KEY_ALARM = P3^6;	// 调节闹钟数值按键
sbit KEY_TIME = P3^7; // 调节时钟数值按键
sbit KEY_HOURADD = P1^0; // 小时+
sbit KEY_HOURDEC = P1^1; // 小时-
sbit KEY_MINADD = P1^2; // 分钟+
sbit KEY_MINDEC = P1^3; // 分钟-
sbit KEY_SECONDADD = P1^4; // 秒钟+
sbit KEY_SECONDDEC = P1^6; // 秒钟-

/* LED定义 */
sbit LED_BEEP = P3^4; 	// 闹钟时间到指示灯
sbit LED_ALARM = P3^1;	// 闹钟数值调节状态指示灯
sbit LED_CLOCK = P3^0;	// 时钟数值调节状态指示灯

/* 蜂鸣器定义 */
sbit BEEP = P3^3;	

uchar alarm = 0; // 闹钟标志

uint count = 0; // 定时器计数

uchar min = 0;
uchar hour = 0;
uchar second = 0;

uchar time[] = {0, 0, 0, 0, 0, 0};

uchar minA = 0;
uchar hourA = 0;
uchar secondA = 0;
uchar alarmTime[] = {0, 0, 0, 0, 0, 0};

uchar flag = 0; // 调整状态标志

unsigned char code table[] = {
	0X3F, 0X06, 0X5B, 0X4F, 0X66, 
	0X6D, 0X7D, 0X07, 0X7F, 0X6F
}; // 段码表，数字0-9

unsigned char code segment[] = {
	0XFE, 0XFD, 0XFB, 0XF7, 0XEF, 0XDF
};	// 位选表

/* 延时函数 */
void delay(uint x)
{
	uint i, j;
	for (i = 0; i < x; i++)
		for (j = 0; j < 101; j++);
}

/* 时间显示 */
void clockDisplay(uchar time[])
{
	uint i;
	for (i = 0; i < DIG; i++) {
		P2 |= 0X3F; // 清除位选
		P0 = 0X00;	// 消影
		P2 = segment[i]; // 位选
		P0 = table[time[i]]; // 段选
		delay(3);
	}
}

/* 定时器初始化 */
void timerInit()
{
	TMOD = 1 << TMOD; // TIME0定时器，方式1（16位）
	TH0 = 0X3C;
	TL0 = 0XB0;	// 3CB0H = 15536，50ms
	EA = 1; // 开启总中断
	ET0 = 1; // 使能定时器中断
	TR0 = 1; // 使能定时器
}

/* 时间分割 */
void timeDivide()
{
	time[0] = hour / 10;
	time[1] = hour % 10;
	time[2] = min / 10;
	time[3] = min % 10;
	time[4] = second / 10;
	time[5] = second % 10;
}

void alarmDivide()
{
	alarmTime[0] = hourA / 10;
	alarmTime[1] = hourA % 10;
	alarmTime[2] = minA / 10;
	alarmTime[3] = minA % 10;
	alarmTime[4] = second / 10;
	alarmTime[5] = second % 10;
}

/* 闹钟时间判断 */
void alarmJudge()
{
	if (alarm == 1) {
		if ((hour == hourA) && (min == minA) && (second == secondA)) {
			BEEP = 1;
			LED_BEEP = 1;
		}
	}
}

/* 定时器中断 */
void timeInterrup() interrupt 1
{
	count++;
	TH0 = 0X3C;
	TL0 = 0XB0;	// 0.05s重新送数
	if (count == 20) {
		second++;
		count = 0;
		if (second == 60) {
			second = 0;
			min++;
			if (min == 60) {
				min = 0;
				hour++;
				if (hour == 24) 
					hour = 0;
			}
		}
	}		
	timeDivide();
	if (flag == 0)
		clockDisplay(time);
	alarmJudge(); // 判断闹钟到否
}

/* 外设初始化 */
void deviceInit()
{
	LED_BEEP = 0;
	LED_ALARM = 0;
	LED_CLOCK = 0;
	BEEP = 0;
}

/* 键盘扫描 */
void keyScan()
{
	if (KEY_TIME == 0) {
		LED_CLOCK = 1;
		flag = 1;
		TR0 = 0;
		clockDisplay(time);
		if (KEY_HOURADD == 0) {
			delay(10);
			if (KEY_HOURADD == 0) {
				hour++;
				if (hour == 24)
					hour = 0;
			}
			timeDivide();
			clockDisplay(time);
		}
		if (KEY_HOURDEC == 0) {
			delay(10);
			if (KEY_HOURDEC == 0) {
				hour--;
				if (hour == -1)
					hour = 23;
			}
			timeDivide();
			clockDisplay(time);
		}
		if (KEY_MINADD == 0) {
			delay(10);
			if (KEY_MINADD == 0) {
				min++;
				if (min == 60)
					min = 0;
			}
			timeDivide();
			clockDisplay(time);
		}
		if (KEY_MINDEC == 0) {
			delay(10);
			if (KEY_MINDEC == 0) {
				min--;
				if (min == -1)
					min =59;
			}
			timeDivide();
			clockDisplay(time);

		}
		if (KEY_SECONDADD == 0) {
			delay(10);
			if (KEY_SECONDADD == 0) {
				second++;
				if (second == 60)
					second = 0;
			}
			timeDivide();
			clockDisplay(time);
		}
		if (KEY_SECONDDEC == 0) {
			delay(10);
			if (KEY_SECONDDEC == 0) {
				second--;
				if (second == -1)
					second =59;
			}
			timeDivide();
			clockDisplay(time);
		}
	}
	
	if (KEY_ALARM == 0) {
		LED_ALARM  = 1;
		flag = 2;
		clockDisplay(alarmTime);
		if (KEY_HOURADD == 0) {
			delay(10);
			if (KEY_HOURADD == 0) {
				hourA++;
				if (hourA == 24)
					hourA = 0;
			}
			alarmDivide();
			clockDisplay(alarmTime);
		}
		if (KEY_HOURDEC == 0) {
			delay(10);
			if (KEY_HOURDEC == 0) {
				hourA--;
				if (hourA == -1)
					hourA = 23;
			}
			alarmDivide();
			clockDisplay(alarmTime);
		}
		if (KEY_MINADD == 0) {
			delay(10);
			if (KEY_MINADD == 0) {
				minA++;
				if (minA == 60)
					minA = 0;
			}
			alarmDivide();
			clockDisplay(alarmTime);
		}
		if (KEY_MINDEC == 0) {
			delay(10);
			if (KEY_MINDEC == 0) {
				minA--;
				if (minA == -1)
					minA =59;
			}
			alarmDivide();
			clockDisplay(alarmTime);

		}
		if (KEY_SECONDADD == 0) {
			delay(10);
			if (KEY_SECONDADD == 0) {
				secondA++;
				if (secondA == 60)
					secondA = 0;
			}
			alarmDivide();
			clockDisplay(alarmTime);
		}
		if (KEY_SECONDDEC == 0) {
			delay(10);
			if (KEY_SECONDDEC == 0) {
				secondA--;
				if (secondA == -1)
					secondA =59;
			}
			alarmDivide();
			clockDisplay(alarmTime);
		}
	}
}

void keyIntterupt() interrupt 0
{
	if (flag != 0) {
		clockDisplay(time);
		if (flag == 1) {
			LED_CLOCK = 0;
			TR0 = 1;
		}
		else if (flag == 2) {
			LED_ALARM = 0;
			alarm = 1; // 使能闹钟
		}
		flag = 0;
	}
	else if (BEEP == 1) { // 关闭闹钟
		BEEP = 0;
		LED_BEEP = 0;
	}
	else { // 时钟清零
		hour = 0;
		min = 0;
		second = 0;
	}
}

void main()
{
	timerInit();
	deviceInit();
	IT0 = 1; // 开外部中断
	EX0 = 1;
	while(1) {
		keyScan();
	};
}

expression_float.c

/* 用于确认单精度浮点数表示方法的C语言程序（摘自《程序是怎样跑起来的》），做了一点改动 */

#include <stdio.h>
#include <string.h>

int main() 
{
  float data;
  unsigned long buff;
  int i;
  char s[34];
  
  scanf("%f", &data);
  
  // 把数据复制到 4 字节长度的整数变量 buff 中以逐个提取出每一位
  memcpy(&buff, &data, 4);
  
  // 逐一提取出每一位
  for (i = 33; i >= 0; i--) {
      if (i == 1 || i == 10) 
          // 加入破折号来区分符号部分、指数部分和尾数部分
          s[i] = '-';
       else {
          if (buff % 2 == 1) 
            s[i] = '1';
         else 
            s[i] = '0';
          buff /= 2;
       }
  }
  s[33] = '\0';
  
  printf("%s\n", s);
  
  return 0;
}

hanldeSMSLog.html

<!--
    * Author: Fish__404
    * Create Date: 2021-01-27
    * Modify Date: 2021-01-29
    * Description: 处理SMS log文件，统计数量 （由于还不熟悉CSS和HTML，排版有点乱...)
    * Log 样例:
    * 12/19/2019 1:43:33 PM
    * XXXXXXXXX发送至 12341234 成功!
    * 12/19/2019 3:45:32 PM
    * XXXXXXXXX发送至 11111234; 成功!
    * 12/19/2019 4:00:13 P12341234M
    * XXX处理完毕发送SMS至 +8612345678912 成功!Succeed to send single SMS!
    * XXX处理完毕发送至 11111111 成功!
    * XXX处理完毕抄送至 test@test.com; 成功!
-->
<html>

<head>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.js"></script>
    <style>
        h1 {
            text-align: center;
            margin: 10px;
        }
        
        body {
            margin: 10px;
        }
        
        table {
            margin: 10px;
            margin-left: 100px;
            width: fit-content;
        }
        
        #tables {
            display: inline-flex;
            text-align: center;
        }
        
        td {
            padding: 3 10 3 10;
            width: fit-content;
            text-align: center;
        }
        
        #userInput {
            margin: 10px;
            text-align: center;
        }
        
        button {
            height: auto;
        }
    </style>
</head>

<body>
    <div id="userInput">
        <h1>Vehicle Plan SMS Log Analysis</h1>
        <label for="fileInput">
                        Select a log file: 
                        <input type="file" id="fileInput">
                    </label>
        <label for="begDate">
                        Begin Date:
                        <input id="begDate" type="date">
                    </label>
        <label for="endDate">
                        End Date:
                        <input id="endDate" type="date">
                    </label>
        <button id="alyBut">Analysis</button>
        <button id="reset">Reset</button>
    </div>
    <hr>
    <div id="tables">
        <table>
            <thead>
                <tr>
                    <th>Vehicle Log Analysis</th>
                </tr>
                <tr>
                    <td>Total SMS
                        <p id="totalSMS"></p>
                    </td>
                    <td>Fail
                        <p id="Fail"></p>
                    </td>
                </tr>
                <tr id="datarow">
                    <td>Date</td>
                    <td>Phone</td>
                    <td>Status</td>
                </tr>
            </thead>
            <tbody id="databody">
            </tbody>
        </table>
        <table id="monthlytb">
            <thead>
                <tr>
                    <th>Analysis result by month</th>
                </tr>
                <tr>
                    <td>Month</td>
                    <td id="month"></td>
                    <td>Total</td>
                    <td id="mtotal"></td>
                </tr>
            </thead>
            <tbody id="mdatabody">
            </tbody>
        </table>
    </div>
    <div id="logtext" hidden="true"></div>
    <script type="text/javascript">
        // 正则匹配Log中的日期类型
        var dateformat = /((\d{1,2}\/){2}\d{4}\s(\d{1,2}:){2}\d{1,2}\s[AP]M)|(\d{4}(\/\d{1,2}){2}\s(\d{1,2}:){2})\d{1,2}/;
        var phoneFormat = /(\+86\d{11})|(\+852\d{11})|(\d{4}-\d{8})|(\d{3}-\d{4}-\d{4})|(\d{5})/g;
        var dateOptions = {
            year: "numeric",
            month: "2-digit",
            day: "2-digit",
            hour: "2-digit",
            minute: "2-digit",
            second: "2-digit",
            hour12: false
        }; // 用于格式化日期显示
        var alyBut = document.getElementById('alyBut');
        var fileInput = document.getElementById('fileInput');
        var datarow = document.getElementById('datarow');
        var databody = document.getElementById('databody');
        var logtext = document.getElementById('logtext').textContent;
        var mdatabody = document.getElementById('mdatabody');

        $('#alyBut').on('click', function() {
            var begDate = new Date($('#begDate').val() != "" ? $('#begDate').val() : '1970-01-01');
            var endDate = new Date($('#endDate').val() != "" ? $('#endDate').val() : Date());
            clearTdbody();
            selectLogByDate(begDate, endDate);
        })

        $('#reset').on('click', function() {
            document.getElementById('begDate').value = "";
            document.getElementById('endDate').value = "";
            clearTdbody();
        })

        function exportSMSLog(text) {
            var dateDate;
            text = text.slice(184); // 处理掉前面的无效字符
            var logdata = text.split('\n');
            var newText = "";

            for (let element of logdata) {
                if (element.match(dateformat)) {
                    dateDate = element;
                } else {
                    if (element.match(/SMS/)) {
                        newText += new Intl.DateTimeFormat('en-US', dateOptions).format(new Date(dateDate)) + ';';
                        newText += element.match(phoneFormat) + ';';
                        if (element.match("Succeed")) {
                            newText += "Success";
                        } else {
                            newText += "Fail";
                        }
                        newText += '\n';
                    }
                }
            }

            logtext = newText.slice(0, -1);
        }

        function createTd(Text) {
            return String('<td>' + Text + '</td>');
        }

        function clearTdbody() {
            databody.innerHTML = "";
            mdatabody.innerHTML = "";
            document.getElementById('totalSMS').innerText = "";
            document.getElementById('Fail').innerText = "";
        }

        function dateJudge(date, begDate, endDate) {
            if (date < begDate)
                return 0;
            else if (date > endDate)
                return -1;
            else
                return 1;
        }

        function selectLogByDate(begDate, endDate) {
            var total = 0,
                fail = 0;
            var logdata = logtext.split('\n');
            var month = -1;
            var year = -1;
            var mtotal = 0;

            for (let record of logdata) {
                cells = record.split(';');
                date = new Date(cells[0]);
                if (dateJudge(date, begDate, endDate) == 0) {
                    continue;
                } else if (dateJudge(date, begDate, endDate) == -1)
                    return;
                total++;
                if (cells[2] == "Fail")
                    fail++;
                var tr = document.createElement('tr');
                tr.innerHTML += createTd(cells[0]) + createTd(cells[1]) + createTd(cells[2]);
                databody.appendChild(tr);

                if (date.getFullYear() != year) {
                    showMonthData(mtotal, year, month + 1);
                    year = date.getFullYear();
                    month = date.getMonth();
                    mtotal = 1;
                } else if (date.getMonth() != month) {
                    showMonthData(mtotal, year, month + 1);
                    month = date.getMonth();
                    mtotal = 1;
                } else
                    mtotal += 1;
            }
            showMonthData(mtotal, year, month + 1);
            document.getElementById("Fail").innerText = fail;
            document.getElementById("totalSMS").innerText = total;
        }

        function showMonthData(mtotal, year, month) {
            if (year != -1) {
                var tr = document.createElement('tr');
                tr.innerHTML += createTd(year + '.' + month) + createTd(mtotal);
                mdatabody.appendChild(tr);
            }
        }

        // The function below is from https://stackoverflow.com/questions/27522979/read-a-local-text-file-using-javascript
        fileInput.addEventListener('change', function() {
            var file = fileInput.files[0];
            var textType = /text.*/;

            if (file.type.match(textType)) {
                var reader = new FileReader();
                reader.readAsText(file);
                reader.onload = function() {
                    exportSMSLog(reader.result);
                }
            } else {
                document.getElementById('logtext').hidden = false;
                logtext = "File Not Supported!";
            }
        });
    </script>
</body>

</html>