[尼克的robot]arduino SD卡储存实作伫立的一棵树

[尼克的robot]arduino SD卡储存实作伫立的一棵树

会来找这篇文的人，或是有兴趣点进这篇文的人

想必对arduino的数据储存很有兴趣吧

之前尼克也是想要把显示在电脑上的数据纪录下来才来研究sd卡模组的

至于市面上的sd卡模组有分大小卡

尼克建议买大卡的稳定度会大一点

还有大卡有双排的针脚

记得双排都要插在面包版上稳定度会更高喔

底下就是实际接线的情况

接线

5V - 5V

GND - GND(尼克两个都接,但应该是一个

MOSI - pin 11

MISO - pin 12

CLK - pin 13

CS - pin 4

3.3V - 不用接

程式部分 :

建立一个test.txt档

然后写入testing 1, 2, 3

(如果复制到广告记得删掉中文字喔)

尼克的robot网址 :

https://kenny2019.pixnet.net/blog

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
}

传入程式后打开序列埠

等待一下就可以看到写入的状况

如果错误则会出现以下情况

请检察接线有没有接错(正负极是接好,讯号线顺序)