69 lines
2 KiB
C++
69 lines
2 KiB
C++
/*
|
|
* Copy Example - only runs on chips with 2K or more RAM
|
|
*
|
|
* This sketch copies the file APPEND.TXT, created by the
|
|
* SdFatAppend.pde example, to the file ACOPY.TXT.
|
|
*/
|
|
#include <SdFat.h>
|
|
#include <SdFatUtil.h> // use functions to print strings from flash memory
|
|
|
|
const uint8_t SD_CHIP_SELECT = SS;
|
|
|
|
// file system
|
|
SdFat sd;
|
|
|
|
SdFile from; // read file
|
|
SdFile copy; // write file
|
|
|
|
char* fromName = "APPEND.TXT";
|
|
char* toName = "ACOPY.TXT";
|
|
|
|
// large buffer to test for bugs. 512 bytes runs much faster.
|
|
char buf[600];
|
|
|
|
// store error strings in flash to save RAM
|
|
#define error(s) sd.errorHalt_P(PSTR(s))
|
|
//------------------------------------------------------------------------------
|
|
void setup(void) {
|
|
Serial.begin(9600);
|
|
while (!Serial) {} // wait for Leonardo
|
|
PgmPrintln("Type any character to start");
|
|
while (Serial.read() <= 0) {}
|
|
delay(200); // Catch Due reset problem
|
|
|
|
PgmPrint("FreeRam: ");
|
|
Serial.println(FreeRam());
|
|
|
|
// initialize the SD card at SPI_HALF_SPEED to avoid bus errors with
|
|
// breadboards. use SPI_FULL_SPEED for better performance.
|
|
if (!sd.begin(SD_CHIP_SELECT, SPI_HALF_SPEED)) sd.initErrorHalt();
|
|
|
|
// open for read
|
|
if (!from.open(fromName, O_READ)) {
|
|
PgmPrint("Can't open ");
|
|
Serial.println(fromName);
|
|
PgmPrintln("Run the append example to create the file.");
|
|
error("from.open failed");
|
|
}
|
|
// create if needed, truncate to zero length, open for write
|
|
if (!copy.open(toName, O_CREAT | O_TRUNC | O_WRITE)) {
|
|
error("copy.open failed");
|
|
}
|
|
// count for printing periods
|
|
uint16_t p = 0;
|
|
int16_t n;
|
|
while ((n = from.read(buf, sizeof(buf))) > 0) {
|
|
if (copy.write(buf, n) != n) error("write failed");
|
|
// print progress periods
|
|
if (!(p++ % 25)) Serial.write('.');
|
|
if (!(p % 500)) Serial.println();
|
|
}
|
|
Serial.println();
|
|
if (n != 0) error ("read");
|
|
// force write of directory entry and last data
|
|
if (!copy.close()) error("copy.close failed");
|
|
PgmPrintln("Copy done.");
|
|
}
|
|
|
|
void loop(void) {}
|