初始化提交

arduino-cli/libraries/M5Core2-master/examples/Basics/tfcard/tfcard.ino

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+/*
+*******************************************************************************
+* Copyright (c) 2021 by M5Stack
+*                  Equipped with M5Core2 sample source code
+*                          配套  M5Core2 示例源代码
+* Visit the website for more information: https://docs.m5stack.com/en/core/core2
+* 获取更多资料请访问: https://docs.m5stack.com/zh_CN/core/core2
+*
+* describe: TF Card. TF卡
+* date: 2022/3/25
+*******************************************************************************
+    In this example, we will detect the existence of a file and perform read and
+    write operations on it
+    在这个示例中,我们将会检测某文件是否存在,并进行读写文件操作
+*/
+
+#include <M5Core2.h>
+
+void setup() {
+  M5.begin();
+  if (!SD.begin()) {  // Initialize the SD card. 初始化SD卡
+    M5.Lcd.println(
+        "Card failed, or not present");  // Print a message if the SD card
+                                         // initialization fails or if the
+                                         // SD card does not exist
+    // 如果SD卡初始化失败或者SD卡不存在，则打印消息
+    while (1)
+      ;
+  }
+  M5.Lcd.println("TF card initialized.");
+  if (SD.exists("/hello.txt")) {  // Check if the "/hello.txt" file
+                                  // exists.查看是否存在"/hello.txt"文件
+    M5.Lcd.println("hello.txt exists.");
+  } else {
+    M5.Lcd.println("hello.txt doesn't exist.");
+  }
+  M5.Lcd.println("Creating hello.txt");
+  File myFile = SD.open("/hello.txt",
+                        FILE_WRITE);  // Create a new file "/hello.txt".
+                                      // 创建一个新文件"/hello.txt"
+  if (myFile) {                       // If the file is open, then write to it.
+    // 如果文件打开,则进行写入操作
+    M5.Lcd.println("Writing to test.txt...");
+    myFile.println("SD test.");
+    myFile.close();  // Close the file. 关闭文件
+    M5.Lcd.println("done.");
+  } else {
+    M5.Lcd.println("error opening test.txt");
+  }
+  delay(500);
+  myFile = SD.open("/hello.txt",
+                   FILE_READ);  // Open the file "/hello.txt" in read mode.
+                                // 以读取模式打开文件"/hello.txt"
+  if (myFile) {
+    M5.Lcd.println("/hello.txt Content:");
+    // Read the data from the file and print it until the reading is
+    // complete. 从文件里读取数据并打印到串口,直到读取完成.
+    while (myFile.available()) {
+      M5.Lcd.write(myFile.read());
+    }
+    myFile.close();
+  } else {
+    M5.Lcd.println("error opening /hello.txt");  // If the file is not open.
+                                                 // 如果文件没有打开
+  }
+}
+
+void loop() {}