/* * Warning This example requires extra RAM and may crash on Uno. * Example use of two SD cards. */ #include #include "SdFat.h" #include "FreeStack.h" SdFat sd1; const uint8_t SD1_CS = 10; // chip select for sd1 SdFat sd2; const uint8_t SD2_CS = 4; // chip select for sd2 const uint8_t BUF_DIM = 100; uint8_t buf[BUF_DIM]; const uint32_t FILE_SIZE = 1000000; const uint32_t NWRITE = FILE_SIZE/BUF_DIM; //------------------------------------------------------------------------------ // print error msg, any SD error codes, and halt. // store messages in flash #define errorExit(msg) errorHalt(F(msg)) #define initError(msg) initErrorHalt(F(msg)) //------------------------------------------------------------------------------ void setup() { Serial.begin(9600); // Wait for USB Serial while (!Serial) { SysCall::yield(); } Serial.print(F("FreeStack: ")); Serial.println(FreeStack()); // fill buffer with known data for (size_t i = 0; i < sizeof(buf); i++) { buf[i] = i; } Serial.println(F("type any character to start")); while (!Serial.available()) { SysCall::yield(); } // disable sd2 while initializing sd1 pinMode(SD2_CS, OUTPUT); digitalWrite(SD2_CS, HIGH); // initialize the first card if (!sd1.begin(SD1_CS)) { sd1.initError("sd1:"); } // create Dir1 on sd1 if it does not exist if (!sd1.exists("/Dir1")) { if (!sd1.mkdir("/Dir1")) { sd1.errorExit("sd1.mkdir"); } } // initialize the second card if (!sd2.begin(SD2_CS)) { sd2.initError("sd2:"); } // create Dir2 on sd2 if it does not exist if (!sd2.exists("/Dir2")) { if (!sd2.mkdir("/Dir2")) { sd2.errorExit("sd2.mkdir"); } } // list root directory on both cards Serial.println(F("------sd1 root-------")); sd1.ls(); Serial.println(F("------sd2 root-------")); sd2.ls(); // make /Dir1 the default directory for sd1 if (!sd1.chdir("/Dir1")) { sd1.errorExit("sd1.chdir"); } // make /Dir2 the default directory for sd2 if (!sd2.chdir("/Dir2")) { sd2.errorExit("sd2.chdir"); } // list current directory on both cards Serial.println(F("------sd1 Dir1-------")); sd1.ls(); Serial.println(F("------sd2 Dir2-------")); sd2.ls(); Serial.println(F("---------------------")); // remove rename.bin from /Dir2 directory of sd2 if (sd2.exists("rename.bin")) { if (!sd2.remove("rename.bin")) { sd2.errorExit("remove rename.bin"); } } // set the current working directory for open() to sd1 sd1.chvol(); // create or open /Dir1/test.bin and truncate it to zero length SdFile file1; if (!file1.open("test.bin", O_RDWR | O_CREAT | O_TRUNC)) { sd1.errorExit("file1"); } Serial.println(F("Writing test.bin to sd1")); // write data to /Dir1/test.bin on sd1 for (uint32_t i = 0; i < NWRITE; i++) { if (file1.write(buf, sizeof(buf)) != sizeof(buf)) { sd1.errorExit("sd1.write"); } } // set the current working directory for open() to sd2 sd2.chvol(); // create or open /Dir2/copy.bin and truncate it to zero length SdFile file2; if (!file2.open("copy.bin", O_WRONLY | O_CREAT | O_TRUNC)) { sd2.errorExit("file2"); } Serial.println(F("Copying test.bin to copy.bin")); // copy file1 to file2 file1.rewind(); uint32_t t = millis(); while (1) { int n = file1.read(buf, sizeof(buf)); if (n < 0) { sd1.errorExit("read1"); } if (n == 0) { break; } if ((int)file2.write(buf, n) != n) { sd2.errorExit("write2"); } } t = millis() - t; Serial.print(F("File size: ")); Serial.println(file2.fileSize()); Serial.print(F("Copy time: ")); Serial.print(t); Serial.println(F(" millis")); // close test.bin file1.close(); file2.close(); // list current directory on both cards Serial.println(F("------sd1 -------")); sd1.ls("/", LS_R | LS_DATE | LS_SIZE); Serial.println(F("------sd2 -------")); sd2.ls("/", LS_R | LS_DATE | LS_SIZE); Serial.println(F("---------------------")); Serial.println(F("Renaming copy.bin")); // rename the copy if (!sd2.rename("copy.bin", "rename.bin")) { sd2.errorExit("sd2.rename"); } // list current directory on both cards Serial.println(F("------sd1 -------")); sd1.ls("/", LS_R | LS_DATE | LS_SIZE); Serial.println(F("------sd2 -------")); sd2.ls("/", LS_R | LS_DATE | LS_SIZE); Serial.println(F("---------------------")); Serial.println(F("Done")); } //------------------------------------------------------------------------------ void loop() {}