Arduino Micro SD卡模块使用指南
本章节将介绍如何使用Arduino Micro SD卡模块
一、前期准备:
1、准备好Arduino开发板、SD卡模块(本实验使用的是spi接口）、Micro SD卡以及读卡器
2、安装本项目依赖库SD.h
依次打开 ：“项目-->加载库-->管理库” 后如图1所示，安装SD卡库文件
图1—安装SD卡库文件
3、加载完SD卡相关的库文件，我们会发现示例中多了SD选项，打开示例中的代码，按照注释内容连接SD卡模块，如下图所示：
* SD card attached to SPI bus as follows:
** MOSI - pin 11
** MISO - pin 12
** CLK - pin 13
** CS - pin 4 (for MKRZero SD: SDCARD_SS_PIN)
图2
4、将sd卡通过读卡器接入电脑，创建文本文件test.txt
5、将sd卡插入sd卡模块，准备工作完成
二、烧写程序（这里使用官方实例代码）
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/*
SD card read/write
This example shows how to read and write data to and from an SD card file
The circuit:
* SD card attached to SPI bus as follows:
** MOSI - pin 11
** MISO - pin 12
** CLK - pin 13
** CS - pin 4 (for MKRZero SD: SDCARD_SS_PIN)
created Nov 2010
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe
This example code is in the public domain.
*/
#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...");
if (!SD.begin(4)) {
Serial.println("initialization failed!");
while (1);
}
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
}
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如果上述操作都顺利进行，你将在你的窗口监视器中看到如下数据
