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83 lines
2.3 KiB
Plaintext
83 lines
2.3 KiB
Plaintext
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/*
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* Copy Example - only runs on chips with 2K or more RAM
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*
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* This sketch copies the file APPEND.TXT, created by the
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* SdFatAppend.pde example, to the file ACOPY.TXT.
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*/
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#include <SdFat.h>
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#include <SdFatUtil.h> // use functions to print strings from flash memory
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Sd2Card card;
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SdVolume volume;
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SdFile root;
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SdFile from; // read file
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SdFile copy; // write file
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// large buffer to test for bugs. 512 bytes runs much faster.
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char buf[600];
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// store error strings in flash to save RAM
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#define error(s) error_P(PSTR(s))
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void error_P(const char* str) {
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PgmPrint("error: ");
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SerialPrintln_P(str);
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if (card.errorCode()) {
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PgmPrint("SD error: ");
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Serial.print(card.errorCode(), HEX);
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Serial.print(',');
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Serial.println(card.errorData(), HEX);
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}
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while(1);
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}
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void setup(void) {
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Serial.begin(9600);
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Serial.println();
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PgmPrintln("Type any character to start");
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while (!Serial.available());
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PgmPrint("FreeRam: ");
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Serial.println(FreeRam());
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// initialize the SD card at SPI_HALF_SPEED to avoid bus errors with
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// breadboards. use SPI_FULL_SPEED for better performance.
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if (!card.init(SPI_HALF_SPEED)) error("card.init failed");
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// initialize a FAT volume
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if (!volume.init(&card)) error("volume.init failed");
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// open the root directory
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if (!root.openRoot(&volume)) error("openRoot failed");
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strcpy_P(buf, PSTR("APPEND.TXT"));
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// open for read
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if (!from.open(&root, buf, O_READ)) {
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PgmPrint("Can't open ");
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Serial.println(buf);
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PgmPrintln("Run the append example to create the file.");
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error("from.open failed");
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}
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strcpy_P(buf, PSTR("ACOPY.TXT"));
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// create if needed, truncate to zero length, open for write
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if (!copy.open(&root, buf, O_CREAT | O_TRUNC | O_WRITE)) {
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error("copy.open failed");
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}
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// count for printing periods
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uint16_t p = 0;
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int16_t n;
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while ((n = from.read(buf, sizeof(buf))) > 0) {
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if (copy.write(buf, n) != n) error("write failed");
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// print progress periods
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if (!(p++ % 25)) Serial.print('.');
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if (!(p % 500)) Serial.println();
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}
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Serial.println();
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if (n != 0) error ("read");
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// force write of directory entry and last data
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if (!copy.close()) error("copy.close failed");
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PgmPrintln("Copy done.");
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}
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void loop(void) {}
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