55 lines
1.4 KiB
Arduino
55 lines
1.4 KiB
Arduino
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/*
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* This sketch reads and prints the file
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* PRINT00.TXT created by SdFatPrint.pde or
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* WRITE00.TXT created by SdFatWrite.pde
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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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const uint8_t SD_CHIP_SELECT = SS;
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SdFat sd;
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SdFile file;
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// store error strings in flash to save RAM
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#define error(s) sd.errorHalt_P(PSTR(s))
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void setup(void) {
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Serial.begin(9600);
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while (!Serial) {} // wait for Leonardo
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PgmPrintln("Type any character to start");
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while (Serial.read() <= 0) {}
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delay(200); // Catch Due reset problem
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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(SD_CHIP_SELECT, SPI_HALF_SPEED)) sd.initErrorHalt();
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// open a file
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if (file.open("PRINT00.TXT", O_READ)) {
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Serial.println("Opened PRINT00.TXT");
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}
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else if (file.open("WRITE00.TXT", O_READ)) {
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Serial.println("Opened WRITE00.TXT");
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}
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else{
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error("file.open failed");
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}
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Serial.println();
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// copy file to serial port
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int16_t n;
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uint8_t buf[7];// nothing special about 7, just a lucky number.
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while ((n = file.read(buf, sizeof(buf))) > 0) {
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for (uint8_t i = 0; i < n; i++) Serial.write(buf[i]);
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}
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/* easier way
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int16_t c;
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while ((c = file.read()) > 0) Serial.write((char)c);
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*/
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Serial.println("\nDone");
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}
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void loop(void) {}
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