Hello
I am trying to make a basic micro SD card reader and is wired as the following.
Also, the datasheet for 74HC4050 is:
http://www.nxp.com/documents/data_sheet/74HC4050.pdf
(Arduino Mega Pin)-(74HC4050Pin)
4-14
50-3
51-5
52-7
(74HC4050Pin)-(MicroSDcardReaderPin)
2-D0
4-CMD
6-CLK
15-D3
The Code:
#include <SPI.h>
#include <SD.h>
Sd2Card card;
SdVolume volume;
SdFile root;
const int chipSelect = 4;
void setup() {
pinMode(chipSelect,OUTPUT);:
Serial.begin(9600);
while (!Serial) {
;
}
Serial.print("\nInitializing SD card...");
if (!card.init(SPI_HALF_SPEED, chipSelect)) {
Serial.println("initialization failed. Things to check:");
Serial.println("* is a card 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.");
}
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");
}
if (!volume.init(card)) {
Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
return;
}
uint32_t volumesize;
Serial.print("\nVolume type is FAT");
Serial.println(volume.fatType(), DEC);
Serial.println();
volumesize = volume.blocksPerCluster();
volumesize *= volume.clusterCount();
volumesize *= 512;
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);e
root.ls(LS_R | LS_DATE | LS_SIZE);
}
void loop(void) {
}
Also, I have formatted the SD card with a SD formatting tool, not an OS utility
Can somebody tell me what is wrong?
Thank you.
