I'm working with the Card info sketch in the sd examples, and my 16gb sd card reports as 3gb. It's my understanding that this is a result of Serial.print only understanding uint32_t. I've tried editing print.h to understand long long int, but it's not taking.
What am I not understanding?
size_t print(const __FlashStringHelper *);
size_t print(const String &);
size_t print(const char[]);
size_t print(char);
size_t print(unsigned char, int = DEC);
size_t print(int, int = DEC);
size_t print(unsigned int, int = DEC);
size_t print(long, int = DEC);
//size_t print(long long, int = DEC);
size_t print(unsigned long, int = DEC);
//size_t print(unsigned long long, int = DEC);
size_t print(double, int = 2);
size_t print(const Printable&);
size_t println(const __FlashStringHelper *);
size_t println(const String &s);
size_t println(const char[]);
size_t println(char);
size_t println(unsigned char, int = DEC);
size_t println(int, int = DEC);
size_t println(unsigned int, int = DEC);
size_t println(long, int = DEC);
//size_t println(long long, int = DEC);
size_t println(unsigned long, int = DEC);
//size_t println(unsigned long long, int = DEC);
size_t println(double, int = 2);
size_t println(const Printable&);
size_t println(void);
add this to print.cpp and the signatures to print.h - be aware long long is slow slow
void Print::println(long long n, int base)
{
print(n, base);
println();
}
void Print::print(long long n, int base)
{
if (n < 0) write('-');
if (base == 0) write(n);
else printLLNumber(n, base);
}
void Print::println(unsigned long long n, int base)
{
print(n, base);
println();
}
void Print::print(unsigned long long n, int base)
{
if (base == 0) write(n);
else printLLNumber(n, base);
}
void Print::printLLNumber(unsigned long long n, uint8_t base)
{
unsigned char buf[16 * sizeof(long)]; // Assumes 8-bit chars.
unsigned long long i = 0;
if (n == 0) {
print('0');
return;
}
while (n > 0) {
buf[i++] = n % base;
n /= base;
}
for (; i > 0; i--)
print((char) (buf[i - 1] < 10 ?
'0' + buf[i - 1] :
'A' + buf[i - 1] - 10));
}
I get
C:\Users\Steve\Programs\arduino-1.0.2\hardware\arduino\cores\arduino\nPrint.cpp:230: error: prototype for 'size_t Print::printNumber(long long unsigned int, uint8_t)' does not match any in class 'Print'
C:\Users\Steve\Programs\arduino-1.0.2\hardware\arduino\cores\arduino/Print.h:38: error: candidate is: size_t Print::printNumber(long unsigned int, uint8_t)
When I run
/*
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 <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 = 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 Leonardo only
}
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
uint64_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;
volumesize /= 2;
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) {
}
Print.cpp (6.46 KB)
Print.h (2.71 KB)
I'll will try the code myself, be back asap
[update]
unexpected conflicts - pity ...
a workaround: print it in 2 steps
void setup()
{
Serial.begin(9600);
Serial.println("start...");
uint64_t ll = 123456789012345678ULL;
uint64_t xx = ll/1000000000ULL;
if (xx >0) Serial.print((long)xx);
Serial.print((long)(ll-xx*1000000000));
}
void loop(){}
1 Like
ok. I get
start...
12345678912345678
does this 'trick' solve your problem enough?
An "integrated solution" is more difficult than I expected.
I also had a quick look at - avr-libc: Modules - but found no solutions there either.
Not sure how to merge that into the sd cardinfo sketch .....
// Serial.print("Volume size (bytes): ");
// Serial.println(volumesize);
becomes
Serial.print("Volume size (bytes): ");
uint64_t xx = volumesize/1000000000ULL;
if (xx >0) Serial.print((long)xx);
Serial.print((long)(volumesize - xx*1000000000));
give it a try
I get:
Initializing SD card...Wiring is correct and a card is present.
Card type: SDHC
Volume type is FAT32
Volume size (bytes): 31099904
Files found on the card (name, date and size in bytes):
DCIM/ 2011-06-20 14:58:52
100_PANA/ 2011-06-20 19:07:48
P1000812.JPG 2011-09-08 09:19:54 4158647
P1000781.JPG 2011-08-20 21:02:02 4309863
P1000813.JPG 2011-09-08 09:20:00 4258311
SD_CardInfo.ino (3.69 KB)
Is this what you expected? if not what did you expect?
I was expecting somewhere around 16,000,000,000 bytes .....
can you post your complete code again?