I’m trying to get communication established between a P1 and an SD Card.
I’m currently using the Seeed Studio SD Card Shield V4.0b on top of the SparkFun Photon RedBoard
I’m running the following SD Card Test program:
// This #include statement was automatically added by the Particle IDE.
#include "sd-card-library-photon-compat/sd-card-library-photon-compat.h"
/*
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.
// 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 = 4;
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
}
delay(5000);
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(card.errorCode());
Serial.println(card.errorData());
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) {
}
When I load the software, I get alternating errors of either:
Initializing SD card...Error: CMD8
Error: Sd2Card::init()
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?
or:
Initializing SD card...Wiring is correct and a card is present.
Card type: SD1
Error: Read
Error: Sd2Card::waitStartBlock()
Error: Sd2Card::readData()
Error: SdVolume::init() Cache for read
Error: Read
Error: Sd2Card::waitStartBlock()
Error: Sd2Card::readData()
Error: SdVolume::init() Cache for read2
13
132
Could not find FAT16/FAT32 partition.
Make sure you've formatted the card
To make sure the issue is not with the shield or SD card, I have tried it using an Arduino Uno and the SD library (instead of the photon-compat library) with the same shield/card and the Arduino discovers the SD card and reports its contents with no issues:
Initializing SD card...Wiring is correct and a card is present.
Card type: SD1
Volume type is FAT16
Volume size (bytes): 30841344
Volume size (Kbytes): 30118
Volume size (Mbytes): 29
Files found on the card (name, date and size in bytes):
SYSTEM~1/ 2015-10-20 21:16:14
INDEXE~1 2015-10-20 21:16:16 76
TESTDATA.TXT 2015-11-03 13:37:46 10
Any thoughts on what would prevent the Photon from being able to communicate with a card? I realize this is a very small card (32MB!) but I wouldn’t think that would prevent it from working. I’m guessing there’s something different going on in the photon-compat library, but haven’t been able to find anything in the forum.
Thanks in advance!
