40 lines
1.1 KiB
Arduino
40 lines
1.1 KiB
Arduino
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/*
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* Read the logfile created by the eventlog.pde example.
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* Demo of pathnames and working directories
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*/
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#include <SdFat.h>
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// SD chip select pin
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const uint8_t chipSelect = SS;
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// file system object
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SdFat sd;
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// define a serial output stream
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ArduinoOutStream cout(Serial);
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//------------------------------------------------------------------------------
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void setup() {
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int c;
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Serial.begin(9600);
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while (!Serial) {} // wait for Leonardo
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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 (!sd.begin(chipSelect, SPI_HALF_SPEED)) sd.initErrorHalt();
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// set current working directory
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if (!sd.chdir("LOGS/2011/JAN/")) {
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sd.errorHalt("chdir failed. Did you run eventlog.pde?");
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}
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// open file in current working directory
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ifstream file("LOGFILE.TXT");
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if (!file.is_open()) sd.errorHalt("open failed");
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// copy the file to Serial
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while ((c = file.get()) >= 0) cout << (char)c;
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cout << "Done" << endl;
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}
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//------------------------------------------------------------------------------
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void loop() {}
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