ada3c1ea8c
GPS tracked SDS011 sensor, transmitting data via Lora through TTN to opensensemap.org based on Arduino Mega
124 lines
No EOL
3.2 KiB
C++
124 lines
No EOL
3.2 KiB
C++
/*
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* Example use of chdir(), ls(), mkdir(), and rmdir().
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*/
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#include <SPI.h>
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#include "SdFat.h"
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// SD card chip select pin.
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const uint8_t chipSelect = SS;
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//------------------------------------------------------------------------------
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// File system object.
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SdFat sd;
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// Use for file creation in folders.
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SdFile file;
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// Create a Serial output stream.
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ArduinoOutStream cout(Serial);
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// Buffer for Serial input.
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char cinBuf[40];
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// Create a serial input stream.
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ArduinoInStream cin(Serial, cinBuf, sizeof(cinBuf));
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//==============================================================================
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// Error messages stored in flash.
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#define error(msg) sd.errorHalt(F(msg))
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//------------------------------------------------------------------------------
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void setup() {
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Serial.begin(9600);
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// Wait for USB Serial
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while (!Serial) {
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SysCall::yield();
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}
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delay(1000);
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cout << F("Type any character to start\n");
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// Wait for input line and discard.
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cin.readline();
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cout << endl;
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// Initialize at the highest speed supported by the board that is
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// not over 50 MHz. Try a lower speed if SPI errors occur.
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if (!sd.begin(chipSelect, SD_SCK_MHZ(50))) {
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sd.initErrorHalt();
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}
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if (sd.exists("Folder1")
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|| sd.exists("Folder1/file1.txt")
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|| sd.exists("Folder1/File2.txt")) {
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error("Please remove existing Folder1, file1.txt, and File2.txt");
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}
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int rootFileCount = 0;
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sd.vwd()->rewind();
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while (file.openNext(sd.vwd(), O_READ)) {
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if (!file.isHidden()) {
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rootFileCount++;
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}
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file.close();
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if (rootFileCount > 10) {
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error("Too many files in root. Please use an empty SD.");
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}
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}
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if (rootFileCount) {
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cout << F("\nPlease use an empty SD for best results.\n\n");
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delay(1000);
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}
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// Create a new folder.
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if (!sd.mkdir("Folder1")) {
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error("Create Folder1 failed");
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}
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cout << F("Created Folder1\n");
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// Create a file in Folder1 using a path.
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if (!file.open("Folder1/file1.txt", O_CREAT | O_WRITE)) {
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error("create Folder1/file1.txt failed");
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}
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file.close();
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cout << F("Created Folder1/file1.txt\n");
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// Change volume working directory to Folder1.
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if (!sd.chdir("Folder1")) {
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error("chdir failed for Folder1.\n");
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}
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cout << F("chdir to Folder1\n");
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// Create File2.txt in current directory.
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if (!file.open("File2.txt", O_CREAT | O_WRITE)) {
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error("create File2.txt failed");
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}
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file.close();
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cout << F("Created File2.txt in current directory\n");
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cout << F("\nList of files on the SD.\n");
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sd.ls("/", LS_R);
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// Remove files from current directory.
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if (!sd.remove("file1.txt") || !sd.remove("File2.txt")) {
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error("remove failed");
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}
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cout << F("\nfile1.txt and File2.txt removed.\n");
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// Change current directory to root.
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if (!sd.chdir()) {
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error("chdir to root failed.\n");
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}
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cout << F("\nList of files on the SD.\n");
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sd.ls(LS_R);
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// Remove Folder1.
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if (!sd.rmdir("Folder1")) {
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error("rmdir for Folder1 failed\n");
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}
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cout << F("\nFolder1 removed.\n");
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cout << F("\nList of files on the SD.\n");
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sd.ls(LS_R);
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cout << F("Done!\n");
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}
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//------------------------------------------------------------------------------
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// Nothing happens in loop.
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void loop() {} |