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54 lines
2.0 KiB
Arduino
54 lines
2.0 KiB
Arduino
/*
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*******************************************************************************
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* Copyright (c) 2023 by M5Stack
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* Equipped with M5Core sample source code
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* 配套 M5Core 示例源代码
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* Visit for more information: https://docs.m5stack.com/en/core/gray
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* 获取更多资料请访问: https://docs.m5stack.com/zh_CN/core/gray
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*
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* Describe: counter. 计数器
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* Date: 2021/8/3
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*******************************************************************************
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*/
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#include <M5Stack.h>
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#include <Preferences.h>
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Preferences preferences;
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void setup() {
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M5.begin(); // Init M5Core. 初始化 M5Core
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M5.Power.begin(); // Init power 初始化电源模块
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M5.Lcd.setTextSize(2);
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preferences.begin(
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"my-app",
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false); // We will open storage in RW-mode (second parameter has to be
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// false).
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// 在perferences中创建叫my-app的空间,并以rw模式打开存储(第二个参数必须为false)
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// preferences.clear(); // Remove all preferences under the opened
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// namespace.清除preferences中所有的空间
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// preferences.remove("counter"); // Or remove the counter key only.
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// 只清除counter中的值
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unsigned int counter = preferences.getUInt(
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"counter",
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0); // Get the counter value in current sapce, if the key does not
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// exist, return a default value of 0.
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// 在当前空间中读取counter的值(若不存在为0),并赋值给counter
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counter++; // Increase counter by 1. 使计数器的值加一
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M5.Lcd.printf(
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"Current counter value: %u\n",
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counter); // Print the counter to Serial Monitor. 串口输出计数器的值
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preferences.putUInt(
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"counter",
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counter); // Store the counter to the Preferences. 存储计数器的值
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preferences.end(); // Close the Preferences. 关闭Preferences
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M5.Lcd.println("Restarting in 10 seconds..");
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delay(10000); // delay 10. 延迟10s
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ESP.restart(); // Restart. 重启
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}
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void loop() {
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}
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