diff --git a/libraries/SD/examples/listfilesEnhanced/listfilesEnhanced.ino b/libraries/SD/examples/listfilesEnhanced/listfilesEnhanced.ino new file mode 100644 index 0000000000..5daa3294ad --- /dev/null +++ b/libraries/SD/examples/listfilesEnhanced/listfilesEnhanced.ino @@ -0,0 +1,134 @@ +/* + 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 +#include +#include + +#define SD_CS_PIN 4 + + +void dir(String path) { + std::vector 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 &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); + } + } +}