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Merge branch 'master' into patch-1
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mcspr authored Nov 20, 2024
2 parents 108e650 + 9e3ba26 commit 25e241f
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134 changes: 134 additions & 0 deletions libraries/SD/examples/listfilesEnhanced/listfilesEnhanced.ino
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/*
Listfiles Enhanced
This example demonstrates how to list files on an SDcard in the following way:
1) collect all directories
2) build full path of directories and keep in mind
3) then print all files with the help of the directorie pathes
Wiring:
SDcard attached to SPI bus as follows:
- MOSI: pin 11
- MISO: pin 12
- CLK : pin 13
- CS : pin 4
Created:
18. Nov 2024 by Frank Häfele
This example code is in the public domain.
*/
#include <SPI.h>
#include <SD.h>
#include <vector>

#define SD_CS_PIN 4


void dir(String path) {
std::vector<String> directories;
collectDirectories(path, directories);
for (auto directory : directories) {
printDirectoryName(directory.c_str(), 1);
File fs = SD.open(directory);
printFilesInDirectory(fs);
Serial.println("\n===============");
fs.close();
}
}

void setup() {
// Open serial communications and wait for port to open:
Serial.begin(115200);

Serial.print("\n\n==== List Directory ====\n\n");
listDirectory();

Serial.println("done!");
}

void loop() {
// nothing happens after setup finishes.
}

void listDirectory() {
Serial.print("\n\nInitializing SD card...");
if (!SD.begin(SD_CS_PIN)) {
Serial.println("initialization failed!");
return;
}
Serial.print("initialization successful.\n");
Serial.print("List Files:\n");
dir("/");
}


void printDirectoryName(const char *name, uint8_t level) {
for (uint8_t i = 0; i < level; ++i) {
Serial.print(" ");
}
Serial.println(name);
}



// helper function: combine path
String joinPath(const String &base, const String &name) {
if (base.endsWith("/")) {
return base + name;
}
return base + "/" + name;
}

// recusive function to collect directory names
void collectDirectories(const String &dirname, std::vector<String> &directories) {
File root = SD.open(dirname);
if (!root || !root.isDirectory()) {
Serial.printf("Error: Cannot open %s\n", dirname.c_str());
return;
}
directories.push_back(dirname);

File file = root.openNextFile();
while (file) {
if (file.isDirectory()) {
String fullPath = joinPath(dirname, file.name());
collectDirectories(fullPath, directories);
}
file = root.openNextFile();
}
root.close();
}

// print filenames
void printFileName(File file) {
Serial.print("\t");
Serial.printf("%30s", file.name());
// files have sizes, directories do not
Serial.print(" - ");
Serial.print(file.size(), DEC);
time_t cr = file.getCreationTime();
time_t lw = file.getLastWrite();
struct tm *tmstruct = localtime(&cr);
Serial.printf("\tCREATION: %d-%02d-%02d %02d:%02d:%02d", (tmstruct->tm_year) + 1900, (tmstruct->tm_mon) + 1, tmstruct->tm_mday, tmstruct->tm_hour, tmstruct->tm_min, tmstruct->tm_sec);
tmstruct = localtime(&lw);
Serial.printf("\tLAST WRITE: %d-%02d-%02d %02d:%02d:%02d\n", (tmstruct->tm_year) + 1900, (tmstruct->tm_mon) + 1, tmstruct->tm_mday, tmstruct->tm_hour, tmstruct->tm_min, tmstruct->tm_sec);
}


// print files in directories
void printFilesInDirectory(File dir) {
while (true) {
auto file = dir.openNextFile();
if (!file) {
// no more files
break;
}
if (file.isDirectory()) {
continue;
} else {
printFileName(file);
}
}
}

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