mirror of
https://github.com/esp8266/Arduino.git
synced 2025-06-19 09:42:11 +03:00
Moving all AVR specific libraries to hardware/avr
This commit is contained in:
78
hardware/avr/libraries/SD/examples/Files/Files.pde
Normal file
78
hardware/avr/libraries/SD/examples/Files/Files.pde
Normal file
@ -0,0 +1,78 @@
|
||||
/*
|
||||
SD card basic file example
|
||||
|
||||
This example shows how to create and destroy 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
|
||||
|
||||
created Nov 2010
|
||||
by David A. Mellis
|
||||
updated 2 Dec 2010
|
||||
by Tom Igoe
|
||||
|
||||
This example code is in the public domain.
|
||||
|
||||
*/
|
||||
#include <SD.h>
|
||||
|
||||
File myFile;
|
||||
|
||||
void setup()
|
||||
{
|
||||
Serial.begin(9600);
|
||||
Serial.print("Initializing SD card...");
|
||||
// On the Ethernet Shield, CS is pin 4. It's set as an output by default.
|
||||
// Note that even if it's not used as the CS pin, the hardware SS pin
|
||||
// (10 on most Arduino boards, 53 on the Mega) must be left as an output
|
||||
// or the SD library functions will not work.
|
||||
pinMode(10, OUTPUT);
|
||||
|
||||
if (!SD.begin(4)) {
|
||||
Serial.println("initialization failed!");
|
||||
return;
|
||||
}
|
||||
Serial.println("initialization done.");
|
||||
|
||||
if (SD.exists("example.txt")) {
|
||||
Serial.println("example.txt exists.");
|
||||
}
|
||||
else {
|
||||
Serial.println("example.txt doesn't exist.");
|
||||
}
|
||||
|
||||
// open a new file and immediately close it:
|
||||
Serial.println("Creating example.txt...");
|
||||
myFile = SD.open("example.txt", FILE_WRITE);
|
||||
myFile.close();
|
||||
|
||||
// Check to see if the file exists:
|
||||
if (SD.exists("example.txt")) {
|
||||
Serial.println("example.txt exists.");
|
||||
}
|
||||
else {
|
||||
Serial.println("example.txt doesn't exist.");
|
||||
}
|
||||
|
||||
// delete the file:
|
||||
Serial.println("Removing example.txt...");
|
||||
SD.remove("example.txt");
|
||||
|
||||
if (SD.exists("example.txt")){
|
||||
Serial.println("example.txt exists.");
|
||||
}
|
||||
else {
|
||||
Serial.println("example.txt doesn't exist.");
|
||||
}
|
||||
}
|
||||
|
||||
void loop()
|
||||
{
|
||||
// nothing happens after setup finishes.
|
||||
}
|
||||
|
||||
|
||||
|
Reference in New Issue
Block a user