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- /*
- 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
- created 28 Mar 2011
- by Limor Fried
- - Cleaned up all SD examples included with MPIDE for consistency in defining CS pins
- revised 24 May 2013 by Jacob Christ
- */
- // 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
- // 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.
- // Default SD chip select for Uno and Mega type devices
- const int chipSelect_SD_default = 10; // Change 10 to 53 for a Mega
- // chipSelect_SD can be changed if you do not use default CS pin
- const int chipSelect_SD = 4; //ATOM32 CS Line
- const int SW2 = 5;
- int isReady = 0;
- void setup()
- {
- Serial.begin(9600);
- }
- void loadCard()
- {
- Serial.print("\nInitializing SD card...");
- // Make sure the default chip select pin is set to so that
- // shields that have a device that use the default CS pin
- // that are connected to the SPI bus do not hold drive bus
- pinMode(chipSelect_SD_default, OUTPUT);
- digitalWrite(chipSelect_SD_default, HIGH);
- pinMode(chipSelect_SD, OUTPUT);
- digitalWrite(chipSelect_SD, HIGH);
- // 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_SD)) {
- 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
- long 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) {
- isReady = 0;
- pinMode(SW2, INPUT);
- while(isReady == 0)
- {
- if(digitalRead(SW2) == 0)
- isReady = 1;
- }
- loadCard();
- }
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