Pin 1,4, 7 and 10 are connected to ground. Pin 14 , 12, 13 are connected to 3.3 V. Pull up resistor is connected to the 5V pin on the Arduino. SD card's power pin is connected to the 3.3 V pin on the Arduino.
When I try to run SD card test program it says there is a problem with wiring or chip select pin.
I think according to this connection, I should select chip select pin as 10. But despite many attempts I shouldn't be able to run this program successfully.
The thing that comes to my mind is may be there is a disconnection in home made breadboard adapter.
Or may the 74HC125 chip may have an ESD damage ?! There are two power rails connecting to the breadboard. One is 3.3 V the other one is 5V. Ground's are connected. When I try to measure the voltage between + rail of 3.3V and ground, instead of 3.3V I measure about 4.2 volts. Is it normal?
** CS - depends on your SD card shield or module.
Pin 4 used here for consistency with other Arduino examples
.
.
.
// 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
const int chipSelect = 4;
/*
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/Duemilanove/Diecimila
** MISO - pin 12 on Arduino Uno/Duemilanove/Diecimila
** CLK - pin 13 on Arduino Uno/Duemilanove/Diecimila
** CS - depends on your SD card shield or module.
Pin 4 used here for consistency with other Arduino examples
created 28 Mar 2011
by Limor Fried
modified 16 Mar 2011
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
const int chipSelect = 10;
void setup()
{
Serial.begin(9600);
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(10, 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) {
}
After uploading program to Arduino it says:
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?
I changed chip select pin values to 4, 10 and 8. But still program gives the same error.
Also when I measure voltage between 3.3 volt rail and ground it is 4.28 volts. This confused me a bit. Shouldn't it be 3.3 volts.
I updated the chipSelect pin to 10. Also power rails are not split into two parts in my breadboard.
After playing around a little bit and using resistors instead of 74HC125 IC I saw another message: "Could not find FAT16/FAT32 partition. Make sure you've formatted the card"
So as fat16lib mentioned I suspect that there is a disconnection in the home made SD adapter.
I ordered a SD/MMC card holder and a few spare 74HC125 IC chips. I will solder the 8 large leftmost pins of the holder to the corresponding wires.