Write test program for the SdFat library

iot/SdFatTest/SdFatTest.ino

@@ -0,0 +1,44 @@
+#include <Arduino.h>
+#include <SdFat.h>
+
+#define PIN_SPI_CHIP_SELECT_OTHER_DEVICE	SS
+#define	PIN_SPI_CHIP_SELECT	3
+
+void setup() {
+	Serial.begin(115200);
+	// Disable everything by default
+	pinMode(PIN_SPI_CHIP_SELECT_OTHER_DEVICE, OUTPUT);
+	pinMode(PIN_SPI_CHIP_SELECT, 3);
+	digitalWrite(PIN_SPI_CHIP_SELECT_OTHER_DEVICE, HIGH);
+	digitalWrite(PIN_SPI_CHIP_SELECT, HIGH);
+	
+	Serial.println("Setup complete");
+}
+
+void loop() {
+	SdFat card;
+	if(!card.begin(PIN_SPI_CHIP_SELECT, SD_SCK_MHZ(50))) {
+		card.initErrorHalt();
+	}
+	
+	SdFile file;
+	
+	if(!file.open("TEST.TXT", O_WRITE | O_CREAT | O_APPEND)) {
+		Serial.println(F("Error: Failed to open microSD card"));
+		while(true) delay(100);
+	}
+	
+	char message[] = "strawberry\n";
+	file.write(message, 11);
+	
+	if(!file.sync() || file.getWriteError()) {
+		Serial.println(F("Error: Failed to open microSD card"));
+		while(true) delay(100);
+	}
+	
+	file.close();
+	
+	Serial.println(F("tick"));
+	
+	delay(5000);
+}