First Commit

libraries/SdFat/examples/SoftwareSpi/SoftwareSpi.ino

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+// An example of the SoftSpiDriver template class.
+// This example is for an old Adafruit Data Logging Shield on a Mega.
+// Software SPI is required on Mega since this shield connects to pins 10-13.
+// This example will also run on an Uno and other boards using software SPI.
+//
+#include "SdFat.h"
+#if SPI_DRIVER_SELECT == 2  // Must be set in SdFat/SdFatConfig.h
+
+// SD_FAT_TYPE = 0 for SdFat/File as defined in SdFatConfig.h,
+// 1 for FAT16/FAT32, 2 for exFAT, 3 for FAT16/FAT32 and exFAT.
+#define SD_FAT_TYPE 3
+//
+// Chip select may be constant or RAM variable.
+const uint8_t SD_CS_PIN = 10;
+//
+// Pin numbers in templates must be constants.
+const uint8_t SOFT_MISO_PIN = 12;
+const uint8_t SOFT_MOSI_PIN = 11;
+const uint8_t SOFT_SCK_PIN = 13;
+
+// SdFat software SPI template
+SoftSpiDriver<SOFT_MISO_PIN, SOFT_MOSI_PIN, SOFT_SCK_PIN> softSpi;
+// Speed argument is ignored for software SPI.
+#if ENABLE_DEDICATED_SPI
+#define SD_CONFIG SdSpiConfig(SD_CS_PIN, DEDICATED_SPI, SD_SCK_MHZ(0), &softSpi)
+#else  // ENABLE_DEDICATED_SPI
+#define SD_CONFIG SdSpiConfig(SD_CS_PIN, SHARED_SPI, SD_SCK_MHZ(0), &softSpi)
+#endif  // ENABLE_DEDICATED_SPI
+
+#if SD_FAT_TYPE == 0
+SdFat sd;
+File file;
+#elif SD_FAT_TYPE == 1
+SdFat32 sd;
+File32 file;
+#elif SD_FAT_TYPE == 2
+SdExFat sd;
+ExFile file;
+#elif SD_FAT_TYPE == 3
+SdFs sd;
+FsFile file;
+#else  // SD_FAT_TYPE
+#error Invalid SD_FAT_TYPE
+#endif  // SD_FAT_TYPE
+
+void setup() {
+  Serial.begin(9600);
+  // Wait for USB Serial
+  while (!Serial) {
+    yield();
+  }
+  Serial.println("Type any character to start");
+  while (!Serial.available()) {
+    yield();
+  }
+
+  if (!sd.begin(SD_CONFIG)) {
+    sd.initErrorHalt();
+  }
+
+  if (!file.open("SoftSPI.txt", O_RDWR | O_CREAT)) {
+    sd.errorHalt(F("open failed"));
+  }
+  file.println(F("This line was printed using software SPI."));
+
+  file.rewind();
+
+  while (file.available()) {
+    Serial.write(file.read());
+  }
+
+  file.close();
+
+  Serial.println(F("Done."));
+}
+//------------------------------------------------------------------------------
+void loop() {}
+#else  // SPI_DRIVER_SELECT
+#error SPI_DRIVER_SELECT must be two in SdFat/SdFatConfig.h
+#endif  // SPI_DRIVER_SELECT