Add AU915 bandwidth and Adafruit Feather LoRa Boards

README.md

@@ -29,7 +29,7 @@ For more info, see https://www.arduino.cc/en/Guide/Libraries
 Features
 --------
 The LMIC library provides a fairly complete LoRaWAN Class A and Class B
-implementation, supporting the EU-868 and US-915 bands. Only a limited
+implementation, supporting the EU-868, US-915 and AU-915 bands. Only a limited
 number of features was tested using this port on Arduino hardware, so be
 careful when using any of the untested features.
 
@@ -236,6 +236,36 @@ This board uses the following pin mapping:
         .dio = {4, 5, 7},
     };
 
+#### Adafruit Feather 
+
+##### Feather 32u4 RFM95W LoRa Radio 900MHz
+This board uses the following pin mapping:
+
+    const lmic_pinmap lmic_pins = {
+        .nss = 8,
+        .rxtx = LMIC_UNUSED_PIN,
+        .rst = 4,
+        .dio = {7, 6, LMIC_UNUSED_PIN},
+    };
+
+##### Feather M0 RFM95W loRa Radio 900MHz
+This board uses the following pin mapping:
+
+    const lmic_pinmap lmic_pins = {
+        .nss = 8,
+        .rxtx = LMIC_UNUSED_PIN,
+        .rst = 4,
+        .dio = {3, 6, LMIC_UNUSED_PIN},
+    };
+
+**PIN6** and **IO1** from the Adafruit board need to be connected before uploading the code.
+
+A suitable length [antenna](https://learn.adafruit.com/adafruit-feather-32u4-radio-with-lora-radio-module/antenna-options) is also required to ensure good connection qualities.
+
+- 433 MHz - 6.5 inches, or 16.5 cm
+- 868 MHz - 3.25 inches or 8.2 cm
+- 915 MHz - 3 inches or 7.8 cm
+
 Examples
 --------
 This library currently provides three examples:

src/lmic/config.h

@@ -7,6 +7,11 @@
 
 #define CFG_eu868 1
 //#define CFG_us915 1
+//#define CFG_au915 1
+
+#if defined(CFG_au915)
+	#define CFG_us915 1
+#endif 
 // This is the SX1272/SX1273 radio, which is also used on the HopeRF
 // RFM92 boards.
 //#define CFG_sx1272_radio 1

src/lmic/lmic.c

@@ -758,7 +758,11 @@ static void initDefaultChannels (void) {
 
 static u4_t convFreq (xref2u1_t ptr) {
     u4_t freq = (os_rlsbf4(ptr-1) >> 8) * 100;
+    #if defined(CFG_au915)
+    if( freq < AU915_FREQ_MIN || freq > AU915_FREQ_MAX )
+    #else
     if( freq < US915_FREQ_MIN || freq > US915_FREQ_MAX )
+    #endif
         freq = 0;
     return freq;
 }
@@ -821,6 +825,29 @@ static u1_t mapChannels (u1_t chpage, u2_t chmap) {
     return 1;
 }
 
+#if defined(CFG_au915)
+static void updateTx (ostime_t txbeg) {
+    u1_t chnl = LMIC.txChnl;
+    if( chnl < 64 ) {
+        LMIC.freq = AU915_125kHz_UPFBASE + (chnl % 8) * AU915_125kHz_UPFSTEP;
+        LMIC.txpow = 30;
+        return;
+    }
+    LMIC.txpow = 26;
+    if( chnl < 64+8 ) {
+        LMIC.freq = AU915_500kHz_UPFBASE;
+    } else {
+        ASSERT(chnl < 64+8+MAX_XCHANNELS);
+        LMIC.freq = LMIC.xchFreq[chnl-72];
+    }
+
+    // Update global duty cycle stats
+    if( LMIC.globalDutyRate != 0 ) {
+        ostime_t airtime = calcAirTime(LMIC.rps, LMIC.dataLen);
+        LMIC.globalDutyAvail = txbeg + (airtime<<LMIC.globalDutyRate);
+    }
+}
+#else
 static void updateTx (ostime_t txbeg) {
     u1_t chnl = LMIC.txChnl;
     if( chnl < 64 ) {
@@ -842,6 +869,7 @@ static void updateTx (ostime_t txbeg) {
         LMIC.globalDutyAvail = txbeg + (airtime<<LMIC.globalDutyRate);
     }
 }
+#endif
 
 // US does not have duty cycling - return now as earliest TX time
 #define nextTx(now) (_nextTx(),(now))
@@ -871,11 +899,25 @@ static void _nextTx (void) {
 #if !defined(DISABLE_BEACONS)
 static void setBcnRxParams (void) {
     LMIC.dataLen = 0;
+    #if defined(CFG_au915)
+    LMIC.freq = AU915_500kHz_DNFBASE + LMIC.bcnChnl * AU915_500kHz_DNFSTEP;
+    #else
     LMIC.freq = US915_500kHz_DNFBASE + LMIC.bcnChnl * US915_500kHz_DNFSTEP;
+    #endif
     LMIC.rps  = setIh(setNocrc(dndr2rps((dr_t)DR_BCN),1),LEN_BCN);
 }
 #endif // !DISABLE_BEACONS
 
+#if defined(CFG_au915)
+#define setRx1Params() {                                                \
+    LMIC.freq = AU915_500kHz_DNFBASE + (LMIC.txChnl & 0x7) * AU915_500kHz_DNFSTEP; \
+    if( /* TX datarate */LMIC.dndr < DR_SF8C )                          \
+        LMIC.dndr += DR_SF10CR - DR_SF10;                               \
+    else if( LMIC.dndr == DR_SF8C )                                     \
+        LMIC.dndr = DR_SF7CR;                                           \
+    LMIC.rps = dndr2rps(LMIC.dndr);                                     \
+}
+#else
 #define setRx1Params() {                                                \
     LMIC.freq = US915_500kHz_DNFBASE + (LMIC.txChnl & 0x7) * US915_500kHz_DNFSTEP; \
     if( /* TX datarate */LMIC.dndr < DR_SF8C )                          \
@@ -884,6 +926,7 @@ static void setBcnRxParams (void) {
         LMIC.dndr = DR_SF7CR;                                           \
     LMIC.rps = dndr2rps(LMIC.dndr);                                     \
 }
+#endif
 
 #if !defined(DISABLE_JOIN)
 static void initJoinLoop (void) {

src/lmic/lorabase.h

@@ -114,6 +114,30 @@ enum _dr_us915_t { DR_SF10=0, DR_SF9, DR_SF8, DR_SF7, DR_SF8C, DR_NONE,
 enum { DR_DFLTMIN = DR_SF8C };
 enum { DR_PAGE = DR_PAGE_US915 };
 
+#if defined(CFG_au915)
+
+// Default frequency plan for AU 915MHz
+enum { AU915_125kHz_UPFBASE = 916800000,
+       AU915_125kHz_UPFSTEP =    200000,
+       AU915_500kHz_UPFBASE = 917500000,
+     //AU915_500kHz_UPFSTEP =         0,
+       AU915_500kHz_DNFBASE = 923300000,
+       AU915_500kHz_DNFSTEP =    600000
+};
+enum { AU915_FREQ_MIN = 915000000,
+       AU915_FREQ_MAX = 928000000 };
+
+enum { CHNL_PING         = 0 }; // used only for default init of state (follows beacon - rotating)
+enum { FREQ_PING         = AU915_125kHz_UPFBASE + CHNL_PING*AU915_125kHz_UPFSTEP };  // default ping freq
+enum { DR_PING           = DR_SF10CR };       // default ping DR
+enum { CHNL_DNW2         = 0 };
+enum { FREQ_DNW2         = AU915_500kHz_DNFBASE + CHNL_DNW2*AU915_500kHz_DNFSTEP };
+enum { DR_DNW2           = DR_SF12CR };
+enum { CHNL_BCN          = 0 }; // used only for default init of state (rotating beacon scheme)
+enum { FREQ_BCN          = AU915_500kHz_UPFBASE };
+enum { DR_BCN            = DR_SF8C };
+enum { AIRTIME_BCN       = 72192 };  // micros
+#else
 // Default frequency plan for US 915MHz
 enum { US915_125kHz_UPFBASE = 902300000,
        US915_125kHz_UPFSTEP =    200000,
@@ -134,6 +158,7 @@ enum { DR_DNW2           = DR_SF12CR };
 enum { CHNL_BCN          = 0 }; // used only for default init of state (rotating beacon scheme)
 enum { DR_BCN            = DR_SF10CR };
 enum { AIRTIME_BCN       = 72192 };  // micros
+#endif
 
 enum {
     // Beacon frame format US SF10