Odpověď na: Formát SD Card

[Axamith]

Abych minimalizoval problémy s různým pochopením HW a SW, omezil jsem testování na UNO a originální příklady ke knihovně. UNO, napájené přes USB, SD modul připojen na GND a 5V,
CS – PIN 10
MOSI – PIN 11
MISO – PIN 12
SCK – PIN 13

Kartu 4 GB jsem naformátoval pomocí SD Card Formatter, nastavení :
Format type – Full (OverWrite) // i když by stačilo QUICK
Format size adjustment – OFF

Sketch dle příkladu z knihovky SD – CardInfo:

/*
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 9 Apr 2012
by Tom Igoe
*/
// include the SD library:
#include <SPI.h>
#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
// MKRZero SD: SDCARD_SS_PIN
const int chipSelect = 10;

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(„\nInitializing SD card…“);

// 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 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) {

}

a výsledek:
Initializing SD card…initialization failed. Things to check:
* is a card inserted?
* is your wiring correct?
* did you change the chipSelect pin to match your shield or module?

Pro klid duše jsem dal i nové propojovací kabely, vyzkoušel SS piny č. 4, 8, 10 (i když u UNA je jasné, že 4 a 8 je blbost), opět bez výsledku. Taková kravina jako SD karta a co já na tom strávil času … a bez výsledku.