Kevin Barnett / SX1276GenericLib

Fork with intent to refactor and add support for American 902-928(915) Frequency Bands

Files at this revision

API Documentation at this revision

Revision 119:f6ba5b34efee, committed 2021-09-11

Comitter:
Kevin Barnett
Date:
Sat Sep 11 19:17:21 2021 -0700
Parent:
118:f2826a8fbff2
Commit message:
created constants and inline functions for american 902-928 MHz freq

Changed in this revision

sx1276/sx1276.h Show annotated file Show diff for this revision Revisions of this file 
--- a/sx1276/sx1276.h	Fri Jan 18 15:33:46 2019 +0100
+++ b/sx1276/sx1276.h	Sat Sep 11 19:17:21 2021 -0700
@@ -66,25 +66,24 @@
 /*!
  * Type of the supported board. [SX1276MB1MAS / SX1276MB1LAS]
  */
-typedef enum BoardType
-{
+typedef enum BoardType {
     SX1276MB1MAS = 0,
     SX1276MB1LAS,
     RFM95_SX1276,
     MURATA_SX1276,
     HELTEC_L4_1276,
     UNKNOWN
-}BoardType_t;
+} BoardType_t;
 
 
 typedef enum {
-    LORA_SF6 =  6,  //   64 chips/symbol, SF6 requires an TCXO!
-    LORA_SF7 =  7,  //  128 chips/symbol
-    LORA_SF8 =  8,  //  256 chips/symbol
-    LORA_SF9 =  9,  //  512 chips/symbol
-    LORA_SF10 = 10, // 1024 chips/symbol
-    LORA_SF11 = 11, // 2048 chips/symbol
-    LORA_SF12 = 12, // 4096 chips/symbol
+    LORA_SF6 =  6,  //   64 chirps/symbol, SF6 requires an TCXO!
+    LORA_SF7 =  7,  //  128 chirps/symbol
+    LORA_SF8 =  8,  //  256 chirps/symbol
+    LORA_SF9 =  9,  //  512 chirps/symbol
+    LORA_SF10 = 10, // 1024 chirps/symbol
+    LORA_SF11 = 11, // 2048 chirps/symbol
+    LORA_SF12 = 12, // 4096 chirps/symbol
 } lora_spreading_factor_t;
 
 
@@ -103,7 +102,28 @@
     RF_FREQUENCY_868_5 = 868500000, // Hz
 } rf_frequency_t;
 
+const uint32_t US915_U64_Channel0 = 902300000; // Hz
+const uint32_t US915_U8_Channel0  = 903000000; // Hz
+const uint32_t US915_D8_Channel0  = 923300000; // Hz
 
+const uint32_t U64_INC = 200000;  // Hz
+const uint32_t U8_INC  = 1600000; // Hz
+const uint32_t D8_INC  = 600000;  // Hz
+
+inline uint32_t getUpstreamFrequency(const uint8_t chan) {
+    if(chan < 64) {
+        return US915_U64_Channel0 + (chan * U64_INC);
+    }
+    else if(chan <= 71) {
+        return US915_U8_Channel0 + ((chan - 64) * U8_INC);
+    }
+    else
+        return -1;
+}
+
+inline uint32_t getDownstreamFreq(const uint8_t chan) {
+    return (chan < 8) ? US915_D8_Channel0 + (chan * D8_INC) : -1;
+}
 
 /*!
  * Actual implementation of a SX1276 radio, inherits Radio
@@ -626,17 +646,17 @@
     static uint8_t GetLoRaBandwidthRegValue( uint32_t bandwidth );
     
     enum {
-        LORA_BANKWIDTH_7kHz  = 0, //  7.8 kHz requires TCXO
-        LORA_BANKWIDTH_10kHz = 1, // 10.4 kHz requires TCXO
-        LORA_BANKWIDTH_15kHz = 2, // 15.6 kHz requires TCXO
-        LORA_BANKWIDTH_20kHz = 3, // 20.8 kHz requires TCXO
-        LORA_BANKWIDTH_31kHz = 4, // 31.2 kHz requires TCXO
-        LORA_BANKWIDTH_41kHz = 5, // 41.4 kHz requires TCXO
-        LORA_BANKWIDTH_62kHz = 6, // 62.5 kHz requires TCXO
-        LORA_BANKWIDTH_125kHz = 7,
-        LORA_BANKWIDTH_250kHz = 8,
-        LORA_BANKWIDTH_500kHz = 9,
-        LORA_BANKWIDTH_RESERVED = 10,
+        LORA_BANDWIDTH_7kHz  = 0, //  7.8 kHz requires TCXO
+        LORA_BANDWIDTH_10kHz = 1, // 10.4 kHz requires TCXO
+        LORA_BANDWIDTH_15kHz = 2, // 15.6 kHz requires TCXO
+        LORA_BANDWIDTH_20kHz = 3, // 20.8 kHz requires TCXO
+        LORA_BANDWIDTH_31kHz = 4, // 31.2 kHz requires TCXO
+        LORA_BANDWIDTH_41kHz = 5, // 41.4 kHz requires TCXO
+        LORA_BANDWIDTH_62kHz = 6, // 62.5 kHz requires TCXO
+        LORA_BANDWIDTH_125kHz = 7,
+        LORA_BANDWIDTH_250kHz = 8,
+        LORA_BANDWIDTH_500kHz = 9,
+        LORA_BANDWIDTH_RESERVED = 10,
     };
 };