Hallo,
ich werde bald blöde. Erst dachte ich mein Code wäre falsch, obwohl der Wochen vorher funktionierte, dann war ich mir sicher ein Kontaktproblem zu haben, was es nun scheinbar auch nicht ist.
Ich habe 3 Szenarien. Entweder wird die SD Karte richtig ausgelesen und angezeigt oder scheinbar richtig, weil die Daten nicht stimmen können, oder ich bekomme nur Fehlermeldungen.
Folgendes SD Kartenmodul habe ich: http://www.exp-tech.de/Shields/Itead-SD-MICRO-SD-Breakout.html
Wenn die Ausgabe stimmt, sieht es so aus.
Initializing SD card...Wiring is correct and a card is present.
Card type: SD1
Volume type is FAT32
Volume size (bytes): 120979456
Volume size (Kbytes): 118144
Volume size (Mbytes): 115
Files found on the card (name, date and size in bytes):
DOGLCD~1/ 2014-02-17 18:06:56
DOGLCD~1.CPP 2014-02-20 01:25:54 7355
DOGLCD~1.H 2014-03-03 19:14:22 9927
KEYWORDS.TXT 2014-02-17 18:05:18 925
EXAMPLES/ 2014-02-17 18:07:02
HELLOW~1/ 2014-02-20 01:00:56
Wenn die Ausgabe nur scheinbar stimmt, sieht es so aus. Es ist immer noch die gleich 128MB Karte drin. Die Datei text.txt existiert überhaupt nicht.
Initializing SD card...Wiring is correct and a card is present.
Card type: SD2
Volume type is FAT32
Volume size (bytes): 1961811968
Volume size (Kbytes): 1915832
Volume size (Mbytes): 1870
Files found on the card (name, date and size in bytes):
TEST.TXT 2000-01-01 01:00:00 115
und wenn nichts mehr geht, sieht es so
Initializing SD card...Wiring is correct and a card is present.
Card type: SD1
Could not find FAT16/FAT32 partition.
Make sure you've formatted the card
oder so aus
Initializing SD card...initialization failed. Things to check:
* is a card is inserted?
* Is your wiring correct?
* did you change the chipSelect pin to match your shield or module?
Mit dem Resettaster kann ich das meistens mehrfach wiederholen bis die serielle Ausgabe wechselt.
Ist das SD-Modul defekt oder was ich probieren um den Fehler zu finden?
Andere SD-Karten habe ich schon probiert. Gleiches Problem.
Der Code ist immer noch der Gleiche.
/*
SD card test
This example shows how use the utility libraries on which the'
SD library is based in order to get info about your SD card.
Very useful for testing a card when you're not sure whether its working or not.
The circuit:
* SD card attached to SPI bus as follows:
** MOSI - pin 11 on Arduino Uno und bei Mega2560 Pin 51 (DI)
** MISO - pin 12 on Arduino Uno und bei Mega2560 Pin 50 (DO)
** CLK - pin 13 on Arduino Uno und bei Mega2560 Pin 52 (CLK)
** CS - pin 26 frei gewählt Mega2560 (CS)
Pin 4 belegt mit Arduino WiFi/SD Shield
created 28 Mar 2011
by Limor Fried
modified 9 Apr 2012
by Tom Igoe
*/
// include the SD library:
#include <SD.h>
// set up variables using the SD utility library functions:
Sd2Card card;
SdVolume volume;
SdFile root;
// change this to match your SD shield or module;
// Arduino Ethernet shield: pin 4
// Adafruit SD shields and modules: pin 10
// Sparkfun SD shield: pin 8
// bei nur einem Slave Device, µC ist Master, kann Pin auch 53 verwendet werden
const int chipSelect = 26;
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Serial.print("\nInitializing SD card...");
// On the Ethernet Shield, CS is pin 4. It's set as an output by default.
// Note that even if it's not used as the CS pin, the hardware SS pin
// (10 on most Arduino boards, 53 on the Mega) must be left as an output
// or the SD library functions will not work.
pinMode(53, OUTPUT); // change this to 53 on a mega
// we'll use the initialization code from the utility libraries
// since we're just testing if the card is working!
if (!card.init(SPI_HALF_SPEED, chipSelect)) {
Serial.println("initialization failed. Things to check:");
Serial.println("* is a card is inserted?");
Serial.println("* Is your wiring correct?");
Serial.println("* did you change the chipSelect pin to match your shield or module?");
return;
} else {
Serial.println("Wiring is correct and a card is present.");
}
// print the type of card
Serial.print("\nCard type: ");
switch(card.type()) {
case SD_CARD_TYPE_SD1:
Serial.println("SD1");
break;
case SD_CARD_TYPE_SD2:
Serial.println("SD2");
break;
case SD_CARD_TYPE_SDHC:
Serial.println("SDHC");
break;
default:
Serial.println("Unknown");
}
// Now we will try to open the 'volume'/'partition' - it should be FAT16 or FAT32
if (!volume.init(card)) {
Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
return;
}
// print the type and size of the first FAT-type volume
uint32_t volumesize;
Serial.print("\nVolume type is FAT");
Serial.println(volume.fatType(), DEC);
Serial.println();
volumesize = volume.blocksPerCluster(); // clusters are collections of blocks
volumesize *= volume.clusterCount(); // we'll have a lot of clusters
volumesize *= 512; // SD card blocks are always 512 bytes
Serial.print("Volume size (bytes): ");
Serial.println(volumesize);
Serial.print("Volume size (Kbytes): ");
volumesize /= 1024;
Serial.println(volumesize);
Serial.print("Volume size (Mbytes): ");
volumesize /= 1024;
Serial.println(volumesize);
Serial.println("\nFiles found on the card (name, date and size in bytes): ");
root.openRoot(volume);
// list all files in the card with date and size
root.ls(LS_R | LS_DATE | LS_SIZE);
}
void loop(void) {
}