138 lines
3.8 KiB
Plaintext
Executable File
138 lines
3.8 KiB
Plaintext
Executable File
/*
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* Example use of two SD cards.
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*/
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#include <SdFat.h>
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#include <SdFatUtil.h>
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#if !USE_MULTIPLE_CARDS
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#error You must set USE_MULTIPLE_CARDS nonzero in SdFatConfig.h
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#endif
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SdFat sd1;
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const uint8_t SD1_CS = 10; // chip select for sd1
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SdFat sd2;
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const uint8_t SD2_CS = 9; // chip select for sd2
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const uint8_t BUF_DIM = 100;
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uint8_t buf[BUF_DIM];
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const uint32_t FILE_SIZE = 1000000;
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const uint16_t NWRITE = FILE_SIZE/BUF_DIM;
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//------------------------------------------------------------------------------
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// print error msg, any SD error codes, and halt.
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// store messages in flash
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#define errorExit(msg) errorHalt_P(PSTR(msg))
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#define initError(msg) initErrorHalt_P(PSTR(msg))
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//------------------------------------------------------------------------------
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void setup() {
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Serial.begin(9600);
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PgmPrint("FreeRam: ");
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Serial.println(FreeRam());
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// fill buffer with known data
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for (int i = 0; i < sizeof(buf); i++) buf[i] = i;
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PgmPrintln("type any character to start");
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while (Serial.read() < 0) {}
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// disable sd2 while initializing sd1
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pinMode(SD2_CS, OUTPUT);
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digitalWrite(SD2_CS, HIGH);
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// initialize the first card
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if (!sd1.init(SPI_FULL_SPEED, SD1_CS)) {
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sd1.initError("sd1:");
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}
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// create DIR1 on sd1 if it does not exist
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if (!sd1.exists("/DIR1")) {
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if (!sd1.mkdir("/DIR1")) sd1.errorExit("sd1.mkdir");
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}
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// initialize the second card
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if (!sd2.init(SPI_FULL_SPEED, SD2_CS)) {
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sd2.initError("sd2:");
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}
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// create DIR2 on sd2 if it does not exist
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if (!sd2.exists("/DIR2")) {
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if (!sd2.mkdir("/DIR2")) sd2.errorExit("sd2.mkdir");
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}
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// list root directory on both cards
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PgmPrintln("------sd1 root-------");
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sd1.ls();
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PgmPrintln("------sd2 root-------");
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sd2.ls();
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// make /DIR1 the default directory for sd1
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if (!sd1.chdir("/DIR1")) sd1.errorExit("sd1.chdir");
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// make /DIR2 the default directory for sd2
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if (!sd2.chdir("/DIR2")) sd2.errorExit("sd2.chdir");
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// list current directory on both cards
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PgmPrintln("------sd1 DIR1-------");
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sd1.ls();
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PgmPrintln("------sd2 DIR2-------");
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sd2.ls();
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PgmPrintln("---------------------");
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// remove RENAME.BIN from /DIR2 directory of sd2
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if (sd2.exists("RENAME.BIN")) {
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if (!sd2.remove("RENAME.BIN")) {
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sd2.errorExit("remove RENAME.BIN");
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}
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}
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// set the current working directory for open() to sd1
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sd1.chvol();
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// create or open /DIR1/TEST.BIN and truncate it to zero length
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SdFile file1;
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if (!file1.open("TEST.BIN", O_RDWR | O_CREAT | O_TRUNC)) {
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sd1.errorExit("file1");
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}
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PgmPrintln("Writing TEST.BIN to sd1");
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// write data to /DIR1/TEST.BIN on sd1
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for (int i = 0; i < NWRITE; i++) {
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if (file1.write(buf, sizeof(buf)) != sizeof(buf)) {
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sd1.errorExit("sd1.write");
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}
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}
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// set the current working directory for open() to sd2
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sd2.chvol();
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// create or open /DIR2/COPY.BIN and truncate it to zero length
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SdFile file2;
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if (!file2.open("COPY.BIN", O_WRITE | O_CREAT | O_TRUNC)) {
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sd2.errorExit("file2");
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}
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PgmPrintln("Copying TEST.BIN to COPY.BIN");
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// copy file1 to file2
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file1.rewind();
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uint32_t t = millis();
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while (1) {
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int n = file1.read(buf, sizeof(buf));
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if (n < 0) sd1.errorExit("read1");
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if (n == 0) break;
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if (file2.write(buf, n) != n) sd2.errorExit("write2");
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}
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t = millis() - t;
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PgmPrint("File size: ");
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Serial.println(file2.fileSize());
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PgmPrint("Copy time: ");
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Serial.print(t);
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PgmPrintln(" millis");
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// close TEST.BIN
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file1.close();
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// rename the copy
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file2.close();
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if (!sd2.rename("COPY.BIN", "RENAME.BIN")) {
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sd2.errorExit("sd2.rename");
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}
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PgmPrintln("Done");
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}
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//------------------------------------------------------------------------------
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void loop() {}
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