向SD卡中写入一个txt文档

Module_SD库-写入txt文件示例 在下面的示例中，使用Core核心向SD卡中写入一个txt文件。 所需硬件 mCookie-Core mCookie-Battery MCookie-SD 一张TF卡/MicroSD卡 电路搭建 将Battery、Core、MCookie_SD堆叠在一起，并插入SD卡，通过MicroUSB数据线接入电脑。 代码 #include <SPI.h> #include <SD.h> File myFile; void setup() { // Open serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for native USB port only } Serial.print("Initializing SD card..."); // Microduino SD module: pin 7 if (!SD.begin(D7)) { Serial.println("initialization failed!"); return; } Serial.println("initialization done."); // open the file. note that only one file can be open at a time, // so you have to close this one before opening another. myFile = SD.open("test.txt", FILE_WRITE); // if the file opened okay, write to it: if (myFile) { Serial.print("Writing to test.txt..."); myFile.println("testing 1, 2, 3."); // close the file: myFile.close(); Serial.println("done."); } else { // if the file didn't open, print an error: Serial.println("error opening test.txt"); } // re-open the file for reading: myFile = SD.open("test.txt"); if (myFile) { Serial.println("test.txt:"); // read from the file until there's nothing else in it: while (myFile.available()) { Serial.write(myFile.read()); } // close the file: myFile.close(); } else { // if the file didn't open, print an error: Serial.println("error opening test.txt"); } } void loop() { // nothing happens after setup } 若想真正确认SD卡中的内容，可以使用读卡器连接电脑，打开SD卡中的txt文件观察内容是否与程序一致

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