My goal is to be able to navigate through a file system on an SD card and pick out certain file types and display them to the user. When I execute sd.ls(LS_R) on the SdFat library, it shows lots of hidden files. I can deal with most of them fine, but some of them give me headaches. Since the library uses the 8.3 naming convention, it truncates the file/folder names that are too long and replaces it with a "~". This is a problem because then, I cannot distinguish between files/folders that are visible and files/folders that are hidden. Are there any known ways to solve this issue?
Here's my code:
#include <SdFat.h>
const uint8_t chipSelect = 10;
SdFat sd;
SdFile file;
void setup()
{
Serial.begin(9600);
while (!Serial) {} // wait for Leonardo
delay(1000);
if (!sd.begin(chipSelect, SPI_HALF_SPEED)) sd.initErrorHalt();
sd.ls(LS_R);
while(1);
}
void loop() {}
Here is my "visible" file system:
Folder1/
test3.txt
test4.txt
Folder2/
BearsOutside/
test1.txt
test2.txt
LongFilename.txt
And here is the output:
FOLDER1/
TEST4.TXT
TEST3.TXT
TEST2.TXT
~1.TRA
TEST1.TXT
TRASHE~1/
SPOTLI~1/
STORE-V2/
F8D581~1/
PSID.DB
TM~1.SNO
TM~1.LIO
LIO~1.CRE
TMP.CAB
CA~1.CRE
INDEXS~1
~1.IND
~~2.IND
~~~3.IND
~~~~4.IND
~~~~~5.IND
~~~~~~34.IND
~~~~~~37.IND
~~~~~~40.IND
~~~~~~43.IND
~~~~~~46.IND
~~~~~~48.IND
~1.DIR
LIVE~~~4.IND
LIVE~~2.IND
LIVE~~~3.IND
LIVE~~~5.IND
LIVE~~66.IND
LIVE~~69.IND
LIVE~~73.IND
LIVE~1.SHA
LIVE~~79.IND
LIVE~1.DIR
LIVE0D~1.SHA
STORE.DB
STOR~1.DB
REVERS~1
TMPSPO~1.STA
PERMST~1
STORE_~1
JOURNA~1.LIV/
JOURNA~2.LIV/
RETIRE.3
JOURNA~3.LIV/
RETIRE.4
JOURNA~4.LIV/
JOURNA~1.ASS/
JOURNA~2.ASS/
JOURNA~1.HEA/
JOURNA~1.MIG/
JOURNA~2.MIG/
JOURNA~1
JOURNA~1.SCA/
RETIRE.11
REVERS~1.SHA
~1.SHA
SHUTDO~1
JOURNA~1.REP/
CA~1.MOD
LIVE~155.IND
LIVE~158.IND
0DIREC~1.SHA
~~~~~166.SHA
LIVE~169.IND
LIVE~172.IND
LIVE~175.IND
LIVE~178.IND
LIVE~181.IND
LIVE~184.IND
LIVE~1.IND
LIVE~190.IND
LIVE~194.SHA
STOR~1.UPD
REVERS~1.UPD
LIVE~202.IND
TMPSPO~1.LOC
LIVE~208.IND
LIVE~211.IND
LIVE~215.IND
LIVE~218.SHA
LIVE~~2.DIR
LIVE1D~1.SHA
LIVE~264.SHA
LIVE~267.IND
LIVE~270.IND
LIVE~274.IND
LIVE~277.IND
LIVE~~~3.DIR
LIVE~~2.SHA
LIVE~~~3.SHA
LIVE~~~4.SHA
LIVE~~~5.SHA
LIVE~296.SHA
LIVE~300.SHA
LIVE2D~1.SHA
LIVE~308.SHA
LIVE~327.IND
STORE-V1/
VOLUME~1.PLI
VOLUME~1.PLI
FOLDER2/
BEARSO~1/
LONGFI~1.TXT
So my issue is, how do I distinguish between BEARSO~1/ [BearsOutside], which is not hidden, and SPOTLI~1/, which IS hidden?
unfortunately some of the primitive functions are not directly available with the
SdFat sd;
object. Hence precluding the use of the "ls" function. The following code should accomplish what you want. It passes the sd objects current file to the pointer a directory entry object of pointer p. which then can have its attributes tested to see if they are hidden or other.
Note there is a method to test if a directory entry is long name. However, I do not believe the entry is caching the long name itself.
The below does compile. And 99.5 of it is from working code that I use. I have added the attribute and long file name detection, so it should work.
void ListFiles2(uint8_t flags) {
// This code is just copied from SdFile.cpp in the SDFat library
// and tweaked to print to the serial output in html!
dir_t p;
sd.vwd()->rewind();
Serial.println();
while (sd.vwd()->readDir(&p) > 0) {
// done if past last used entry
if (p.name[0] == DIR_NAME_FREE) break;
// skip deleted entry and entries for . and ..
if (p.name[0] == DIR_NAME_DELETED || p.name[0] == '.') continue;
// only list subdirectories and files
if (!DIR_IS_FILE_OR_SUBDIR(&p)) continue;
if ((p.attributes & DIR_ATT_HIDDEN) != DIR_ATT_HIDDEN) continue;
// print any indent spaces
Serial.print(F(" "));
for (uint8_t i = 0; i < 11; i++) {
if (p.name[i] == ' ') continue;
if (i == 8) {
Serial.print('.');
}
Serial.print((char)p.name[i]);
}
Serial.print(F(" "));
// print file name with possible blank fill
for (uint8_t i = 0; i < 11; i++) {
if (p.name[i] == ' ') continue;
if (i == 8) {
Serial.print('.');
}
Serial.print((char)p.name[i]);
if (DIR_IS_LONG_NAME(&p)) {
Serial.print(F(" long fn"));
}
}
if (DIR_IS_SUBDIR(&p)) {
Serial.print('/');
}
// print modify date/time if requested
if (flags & LS_DATE) {
sd.vwd()->printFatDate(p.lastWriteDate);
Serial.print(' ');
sd.vwd()->printFatTime(p.lastWriteTime);
}
// print size if requested
if (!DIR_IS_SUBDIR(&p) && (flags & LS_SIZE)) {
Serial.print(' ');
Serial.print(p.fileSize);
}
Serial.println();
}
Serial.println();
}