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79 lines
1.9 KiB
C++
79 lines
1.9 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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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++) { Serial.print('\t'); }
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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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time_t cr = entry.getCreationTime();
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time_t lw = entry.getLastWrite();
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struct tm* tmstruct = localtime(&cr);
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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);
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tmstruct = localtime(&lw);
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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);
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}
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entry.close();
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}
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}
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