First Commit

libraries/SdFat/examples/MinimumSizeSdReader/MinimumSizeSdReader.ino

@@ -0,0 +1,60 @@
+// Create a text file on the SD with this path using short 8.3 names.
+#define SFN_PATH "/DIR/TEST.TXT"
+
+// Modify CS_PIN for your chip select pin.
+#define CS_PIN SS
+
+// Set USE_SD_H to one for SD.h or zero for SdFat.
+#define USE_SD_H 0
+
+#if USE_SD_H
+#include "SD.h"
+File file;
+#else
+#include "SdFat.h"
+// Setting ENABLE_DEDICATED_SPI to zero saves over 200 more bytes.
+#if ENABLE_DEDICATED_SPI
+#warning \
+    "Set ENABLE_DEDICATED_SPI zero in SdFat/src/SdFatConfig.h for minimum size"
+#endif  // ENABLE_DEDICATED_SPI
+// Insure FAT16/FAT32 only.
+SdFat32 SD;
+// FatFile does not support Stream functions, just simple read/write.
+FatFile file;
+#endif
+
+void error(const char* msg) {
+  Serial.println(msg);
+  while (true) {
+  }
+}
+void setup() {
+  int n;
+  char buf[4];
+
+  Serial.begin(9600);
+  while (!Serial) {
+  }
+  Serial.println("Type any character to begin");
+  while (!Serial.available()) {
+  }
+
+  if (!SD.begin(CS_PIN)) error("SD.begin");
+
+#if USE_SD_H
+  file = SD.open(SFN_PATH);
+  if (!file) error("open");
+#else
+  // Open existing file with a path of 8.3 names.
+  // Directories will be opened O_RDONLY files O_RDWR.
+  if (!file.openExistingSFN(SFN_PATH)) error("open");
+#endif
+  while ((n = file.read(buf, sizeof(buf)))) {
+    Serial.write(buf, n);
+  }
+  // close() is only needed if you write to the file. For example, read
+  // config data, modify the data, rewind the file and write the data.
+  // file.close();
+}
+
+void loop() {}