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72dd589599
* Add time to filesystem API Support the ESP32 File::getLastWrite() call and setting the time on all filesystems automatically (assuming the system clock has been set properly and time(NULL) returns the proper time!). Adds Dir::fileTime() to get the time of a file being listed, similar to Dir::fileName() and Dir::fileSize(). Adds ::setTimeCallback(time_t (*cb)()) to File, Dir, and FS, allowing users to override the default timestamp on a per-file, directory, or filesystem basis. By default, a simple callback returning time(nullptr) is implemented. LittleFS uses the 't' attribute and should be backwards compatible. SD/SDFS work and include wrappers for obsolete SdFat timestamp callbacks using the MSDOS time. This PR does not update SPIFFS, due to compatability concerns and a possible massive rewrite which would make it possible to determine if an old-style ot metadata enabled FS is present at mount time. Includes an updated SD/listfiles and LittleFS_time example. Replaces #6315 * Add links to new mklittlefs w/timestamp support Include the update mklittlefs which generated 't' metadata on imported files. ../tools/sdk/lwip2/include/netif/lowpan6_opts.h * Add explicit note about timestamp being local time * Address review concerns Clean up some awkward object instantiations. Remove the _enableTime flag/setter from SPIFFS. Clean up the FSConfig constructors using C++ style init lists.
83 lines
1.7 KiB
C++
83 lines
1.7 KiB
C++
/*
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Listfiles
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This example shows how print out the files in a
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directory on a SD card
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The circuit:
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SD card attached to SPI bus as follows:
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** MOSI - pin 11
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** MISO - pin 12
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** CLK - pin 13
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** CS - pin 4
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created Nov 2010
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by David A. Mellis
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modified 9 Apr 2012
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by Tom Igoe
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modified 2 Feb 2014
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by Scott Fitzgerald
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This example code is in the public domain.
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*/
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#include <SPI.h>
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#include <SD.h>
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File root;
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void setup() {
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// Open serial communications and wait for port to open:
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Serial.begin(115200);
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while (!Serial) {
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; // wait for serial port to connect. Needed for Leonardo only
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}
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Serial.print("Initializing SD card...");
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if (!SD.begin(SS)) {
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Serial.println("initialization failed!");
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return;
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}
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Serial.println("initialization done.");
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root = SD.open("/");
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printDirectory(root, 0);
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Serial.println("done!");
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}
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void loop() {
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// nothing happens after setup finishes.
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}
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void printDirectory(File dir, int numTabs) {
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while (true) {
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File entry = dir.openNextFile();
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if (! entry) {
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// no more files
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break;
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}
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for (uint8_t i = 0; i < numTabs; i++) {
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Serial.print('\t');
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}
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Serial.print(entry.name());
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if (entry.isDirectory()) {
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Serial.println("/");
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printDirectory(entry, numTabs + 1);
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} else {
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// files have sizes, directories do not
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Serial.print("\t\t");
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Serial.print(entry.size(), DEC);
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Serial.print("\t\t");
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time_t ft = entry.getLastWrite();
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struct tm *tm = localtime(&ft);
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// US format. Feel free to convert to your own locale...
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Serial.printf("%02d-%02d-%02d %02d:%02d:%02d\n", tm->tm_mon + 1, tm->tm_mday, tm->tm_year % 100, tm->tm_hour, tm->tm_min, tm->tm_sec);
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}
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entry.close();
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}
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}
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