单片机代码

.gitignore

+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

.vscode/extensions.json

+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

.vscode/settings.json

+{
+    "MicroPython.executeButton": [
+        {
+            "text": "▶",
+            "tooltip": "运行",
+            "alignment": "left",
+            "command": "extension.executeFile",
+            "priority": 3.5
+        }
+    ],
+    "MicroPython.syncButton": [
+        {
+            "text": "$(sync)",
+            "tooltip": "同步",
+            "alignment": "left",
+            "command": "extension.execute",
+            "priority": 4
+        }
+    ]
+}
\ No newline at end of file

include/README

+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

lib/README

+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

platformio.ini

+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:uno]
+platform = atmelavr
+board = uno
+framework = arduino
+lib_deps = paulstoffregen/Encoder@^1.4.2

src/main.cpp

+#include <Arduino.h>
+#include <EEPROM.h>
+#include <Encoder.h>
+
+// 数码管value:0~9
+byte smg[10] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f};
+
+// 数码管位选引脚
+int com[4] = {6, 5, 4, 3};
+
+// 旋转编码器引脚
+#define CLK 30
+#define SW 31
+#define DT 32
+
+// 蜂鸣器引脚
+#define BEEP PIN_A2
+
+// 是否停止计时
+boolean isStop = true;
+
+// 旋转编码器类
+Encoder encoder(CLK, DT);
+
+// 倒计时时间值
+int times[] = {5, 10, 15, 20, 30, 45, 100, 130, 200, 230, 300, 400, 500, 600, 700, 800, 900, 1000, 1500, 2000, 3000};
+
+// 选择的时间编号
+byte selectedTimeIndex = 0;
+
+//
+int numTimes = 19;
+
+// minute值
+int TimerMinute = 0;
+
+// second值
+int TimerSecond = 0;
+
+// 旋转编码器值
+int encoderVal = 0;
+
+// 同时写入8个引脚的一个字节值
+void Write8Pins(int *pin, byte cmd)
+{
+	for (int i = 0; i < 8; i++)
+	{
+		pinMode(pin[i], OUTPUT);
+		digitalWrite(pin[i], cmd % 2);
+		cmd /= 2;
+	}
+}
+
+// 数码管显示指定值
+void displaySMG(int COM, int value)
+{
+	for (int i = 0; i < 4; i++)
+	{
+		pinMode(com[i], OUTPUT);
+		digitalWrite(com[i], LOW);
+	}
+	digitalWrite(com[COM], HIGH);
+	int pin[8] = {7, 8, 9, 10, 11, 12, 13, 14};
+	Write8Pins(pin, smg[value]);
+}
+
+// 改变预设时间
+void changeSetTime(int value)
+{
+	selectedTimeIndex = value;
+	if (selectedTimeIndex < 0)
+	{
+		selectedTimeIndex = numTimes;
+	}
+	else if (selectedTimeIndex > numTimes)
+	{
+		selectedTimeIndex = 0;
+	}
+	TimerMinute = times[selectedTimeIndex] / 100;
+	TimerSecond = times[selectedTimeIndex] % 100;
+}
+
+// 更新时间
+void updateTime()
+{
+	static unsigned long lastMillis;	// 记录上次的毫秒数
+	unsigned long curMillis = millis(); // 当前毫秒数
+	// 已经过了1秒
+	if (curMillis > (lastMillis + 1000) && (TimerMinute > 0 || TimerSecond > 0))
+	{
+		// 实现滴答声
+		digitalWrite(BEEP, HIGH);
+		delay(10);
+		digitalWrite(BEEP, LOW);
+		// 处理进位
+		if (TimerSecond == 0)
+		{
+			TimerSecond = 59;
+			TimerMinute--;
+		}
+		else
+		{
+			TimerSecond--;
+		}
+		lastMillis = curMillis; // 更新豪秒数
+	}
+}
+
+void setup()
+{
+	// put your setup code here, to run once:
+	pinMode(SW, INPUT);
+	pinMode(CLK, INPUT);
+	pinMode(DT, INPUT);
+	pinMode(BEEP, OUTPUT);
+	selectedTimeIndex = EEPROM.read(0);
+	TimerMinute = times[selectedTimeIndex] / 100;
+	TimerSecond = times[selectedTimeIndex] % 100;
+}
+
+void loop()
+{
+	// put your main code here, to run repeatedly:
+	// 读取旋转编码器的值
+	encoderVal = encoder.read();
+	// 旋转编码器按键按下
+	if (!digitalRead(SW))
+	{
+		isStop = !isStop;
+		digitalWrite(BEEP, LOW);
+		// 等待按键抬起
+		while (!digitalRead(SW))
+			;
+		EEPROM.write(0, selectedTimeIndex);
+	}
+	// 计时暂停状态
+	if (isStop)
+	{
+		changeSetTime(encoderVal);
+	}
+	else
+	{
+		updateTime();
+	}
+	displaySMG(0, TimerMinute / 10);
+	displaySMG(1, TimerMinute % 10);
+	displaySMG(2, TimerSecond / 10);
+	displaySMG(3, TimerSecond % 10);
+}
\ No newline at end of file

test/README

+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html