一、简介

Micro SD卡模块TF卡读写卡器板载电平转换电路，即接口电平可为5V或3.3V，支持支持Micro SD卡(≤2G)、Micro SDHC高速卡(≤32G)。供电电源为4.5V~5.5V，板载3.3V稳压电路，为电平转换芯片、Micro SD卡供电。通信接口为标准SPI接口，通过文件系统及SPI接口驱动程序，单片机系统即可完成MicroSD卡内的文件进行读写。带有4个M2螺丝定位孔，便于安装。
控制接口：共6个引脚（GND、VCC、MISO、MOSI、SCK、CS），GND为地，VCC为供电电源，MISO、MOSI、SCK为SPI总线，CS为片选信号脚；

二、使用前准备

点击图片购买 Micro SD卡模块TF卡读写卡器

点击图片购买原装正版Arduino uno r3开发板

点击图片购买 USB2.0打印机数据线高速方口连接转接线 A公对B公

点击图片购买杜邦线

Micro SD卡模块TF卡读写卡器	1个
原装正版Arduino uno r3开发板	1个
USB2.0打印机数据线高速方口连接转接线 A公对B公	1条
杜邦线	若干

三、测试方法

用USB2.0打印机数据线高速方口连接转接线与Arduino uno r3开发板连接在一起。Arduino uno r3开发板和Micro SD卡模块连接，插入一张Micro SD卡，如下图所示

Arduino UNO	SD卡模块
5V	VCC
GND	GND
4	MOSI
11	MOSI
12	MISO
13	SCK

打开ArduinoIDE，先点击【文件】，再点击【SD】，最后点击【CardInfo】，如下图所示
代码如下：

/*SD card testThis example shows how use the utility libraries on which the'SD library is based in order to get info about your SD card.Very useful for testing a card when you're not sure whether its working or not.The circuit:SD card attached to SPI bus as follows:** MOSI - pin 11 on Arduino Uno/Duemilanove/Diecimila** MISO - pin 12 on Arduino Uno/Duemilanove/Diecimila** CLK - pin 13 on Arduino Uno/Duemilanove/Diecimila** CS - depends on your SD card shield or module.Pin 4 used here for consistency with other Arduino examplescreated  28 Mar 2011by Limor Friedmodified 9 Apr 2012by Tom Igoe
*/
// include the SD library:
#include <SPI.h>
#include <SD.h>// set up variables using the SD utility library functions:
Sd2Card card;
SdVolume volume;
SdFile root;// change this to match your SD shield or module;
// Arduino Ethernet shield: pin 4
// Adafruit SD shields and modules: pin 10
// Sparkfun SD shield: pin 8
// MKRZero SD: SDCARD_SS_PIN
const int chipSelect = 4;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("\nInitializing SD card...");// we'll use the initialization code from the utility libraries// since we're just testing if the card is working!if (!card.init(SPI_HALF_SPEED, chipSelect)) {Serial.println("initialization failed. Things to check:");Serial.println("* is a card inserted?");Serial.println("* is your wiring correct?");Serial.println("* did you change the chipSelect pin to match your shield or module?");while (1);} else {Serial.println("Wiring is correct and a card is present.");}// print the type of cardSerial.println();Serial.print("Card type:         ");switch (card.type()) {case SD_CARD_TYPE_SD1:Serial.println("SD1");break;case SD_CARD_TYPE_SD2:Serial.println("SD2");break;case SD_CARD_TYPE_SDHC:Serial.println("SDHC");break;default:Serial.println("Unknown");}// Now we will try to open the 'volume'/'partition' - it should be FAT16 or FAT32if (!volume.init(card)) {Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");while (1);}Serial.print("Clusters:          ");Serial.println(volume.clusterCount());Serial.print("Blocks x Cluster:  ");Serial.println(volume.blocksPerCluster());Serial.print("Total Blocks:      ");Serial.println(volume.blocksPerCluster() * volume.clusterCount());Serial.println();// print the type and size of the first FAT-type volumeuint32_t volumesize;Serial.print("Volume type is:    FAT");Serial.println(volume.fatType(), DEC);volumesize = volume.blocksPerCluster();    // clusters are collections of blocksvolumesize *= volume.clusterCount();       // we'll have a lot of clustersvolumesize /= 2;                           // SD card blocks are always 512 bytes (2 blocks are 1KB)Serial.print("Volume size (Kb):  ");Serial.println(volumesize);Serial.print("Volume size (Mb):  ");volumesize /= 1024;Serial.println(volumesize);Serial.print("Volume size (Gb):  ");Serial.println((float)volumesize / 1024.0);Serial.println("\nFiles found on the card (name, date and size in bytes): ");root.openRoot(volume);// list all files in the card with date and sizeroot.ls(LS_R | LS_DATE | LS_SIZE);
}void loop(void) {}

四、实验现象

打开串口助手，可获得卡的一些基本信息

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Arduino UNO驱动micro SD卡读写模块

目录

一、简介

二、使用前准备

三、测试方法

四、实验现象

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