cardSize Failed about sdfat

[pmdmartins123]

On the sdfat library folder there is .h file that have the error codes description. When i locate the file i will post here again. If someone finds it out please post here.

[greiman]

SdInfo can't access the register with card size. This is the first access to the card so you may have a wiring problem.

What board are you using? What type SD module and card? How is it connected?

[pmdmartins123]

Hi,

So I am using an micro sd card reader bought from this store:
https://www.dfrobot.com/product-875.html
the sd card is HC 1 from Scan Disk.
The default wiring is:
13->SCK
12->MISO
11->MOSI
4->Chip Silect
But i have another stuff connected to this ports. So what I had to do was I changed the wiring to another ports and the code that i uploaded to the arduino was this:

#include <SPI.h>
#include <SdFat.h>

/SD Card Congiguration***/
#if ENABLE_SOFTWARE_SPI_CLASS
const uint8_t SOFT_MISO_PIN = 7;
const uint8_t SOFT_MOSI_PIN = 6;
const uint8_t SOFT_SCK_PIN = 5;
const uint8_t SD_CHIP_SELECT_PIN = 4;
#else // ENABLE_SOFTWARE_SPI_CLASS
#error ENABLE_SOFTWARE_SPI_CLASS must be set non-zero in SdFat/SdFatConfig.h
#endif //ENABLE_SOFTWARE_SPI_CLASS

// SdFat software SPI template
SdFatSoftSpi<SOFT_MISO_PIN, SOFT_MOSI_PIN, SOFT_SCK_PIN> sd; // this ables to attribute aonther ports different of the default ports.

// Test file.
SdFile file;
SdFile hour;
File readFile;

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
SPI.begin();
}

void loop(){
....
}

I hope this helps

[pmdmartins123]

If you want to connect to the default wiring all you have to do is:

#include <SPI.h>
//#include <SD.h>
#include "SdFat.h"
SdFat SD; //default wiring

#define SD_CS_PIN SS
File myFile;

void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}

Serial.print("Initializing SD card...");

if (!SD.begin(SD_CS_PIN)) {
Serial.println("initialization failed!");
return;
}
Serial.println("initialization done.");

// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
myFile = SD.open("test.txt", FILE_WRITE);

// if the file opened okay, write to it:
if (myFile) {
Serial.print("Writing to test.txt...");
myFile.println("testing 1, 2, 3.");
// close the file:
myFile.close();
Serial.println("done.");
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}

// re-open the file for reading:
myFile = SD.open("test.txt");
if (myFile) {
Serial.println("test.txt:");

// read from the file until there's nothing else in it:
while (myFile.available()) {
  Serial.write(myFile.read());
}
// close the file:
myFile.close();

} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}

void loop() {
// nothing happens after setup
}

this code is ReadWrite.ino example.

[greiman]

pmdmartins123,

I can't help since I don't have your SD module. The module uses resistor voltage dividers instead of IC level shifters. This type SD module often causes problems.

[pmdmartins123]

ok thanks

[schlaegerz]

I actually know mine is wired correctly because it was working with the built-in SD card libraries.

It turns out that it was a clock speed problem. When I changed it down to 1/2 clock speed everything seems to work just fine.

[greiman]

built-in SD library use 4 MHz by default. You can use higher clock speed with this undocumented call.

boolean begin(uint32_t clock, uint8_t csPin);