add software serial gpstest example

Author: hathach

.gitignore

@@ -15,3 +15,4 @@
 
 .DS_Store
 *.swp
+/Output

libraries/Bluefruit52Lib/examples/Hardware/gpstest_swuart/gpstest_swuart.ino

@@ -0,0 +1,55 @@
+/*********************************************************************
+ This is an example for our nRF52 based Bluefruit LE modules
+
+ Pick one up today in the adafruit shop!
+
+ Adafruit invests time and resources providing this open source code,
+ please support Adafruit and open-source hardware by purchasing
+ products from Adafruit!
+
+ MIT license, check LICENSE for more information
+ All text above, and the splash screen below must be included in
+ any redistribution
+*********************************************************************/
+
+/* This example show how to use Software Serial on Bluefruit nRF52
+ * to interact with GPS FeatherWing https://www.adafruit.com/product/3133
+ * 
+ * Hardware Set up
+ * - Connect 3V and GND to GPS wing
+ * - 
+ */
+
+#include <SoftwareSerial.h>
+
+#define SW_RXD    A0
+#define SW_TXD    A1
+
+// Declare an Software Serial instance
+SoftwareSerial mySerial(SW_RXD, SW_TXD);
+
+void setup() {
+
+  // Init hardware UART <-> Serial Monitor
+  Serial.begin(115200);
+  Serial.println("GPS echo test");
+
+  // Init Software Uart <-> GPS FeatherWing
+  mySerial.begin(9600);      // default NMEA GPS baud
+}
+
+     
+void loop() {
+
+  // Pass data from Serial (HW uart) to GPS Wing (SW Uart)
+  if (Serial.available()) {
+    char c = Serial.read();
+    mySerial.write(c);
+  }
+
+  // Pass data from GPS Wing (SW Uart) to Serial (HW uart)
+  if (mySerial.available()) {
+    char c = mySerial.read();
+    Serial.write(c);
+  }
+}