RAK815 lora works

docs/software/nrf52-TODO.md

@@ -2,6 +2,9 @@
 
 ## RAK815
 
+TODO:
+This board has a TCXO, which is uncommon. For better RF performance it should be enabled P0.05 (RF95_TCXO) high. And then tell the RF95 to use it.
+
 ### Bootloader
 
 Install our (temporarily hacked up) adafruit bootloader
@@ -36,6 +39,7 @@ Run.
 tips on installing https://github.com/platformio/platform-nordicnrf52/issues/8#issuecomment-374017768
 
 to see console output over jlink:
+
 ```
 12:17
 in one tab run "bin/nrf52832-gdbserver.sh" - leave this running the whole time while developing/debugging

src/configuration.h

@@ -113,10 +113,13 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // LoRa SPI
 // -----------------------------------------------------------------------------
 
+// NRF52 boards will define this in variant.h
+#ifndef RF95_SCK
 #define RF95_SCK 5
 #define RF95_MISO 19
 #define RF95_MOSI 27
 #define RF95_NSS 18
+#endif
 
 #endif
 
@@ -159,8 +162,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RF95_RESET 14
 #endif
 #define RF95_IRQ 26
-#define DIO1_GPIO 33 // Note: not really used on this board
+#define RF95_DIO1 33 // Note: not really used on this board
-#define DIO2_GPIO 32 // Note: not really used on this board
+#define RF95_DIO2 32 // Note: not really used on this board
 
 // Leave undefined to disable our PMU IRQ handler
 #define PMU_IRQ 35
@@ -179,11 +182,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define BUTTON_PIN 39
 
 #ifndef USE_JTAG
-#define RESET_GPIO 23
+#define RF95_RESET 23
 #endif
-#define RF95_IRQ_GPIO 26
+#define RF95_IRQ 26
-#define DIO1_GPIO 33 // Note: not really used on this board
+#define RF95_DIO1 33 // Note: not really used on this board
-#define DIO2_GPIO 32 // Note: not really used on this board
+#define RF95_DIO2 32 // Note: not really used on this board
 
 // This board has different GPS pins than all other boards
 #undef GPS_RX_PIN
@@ -214,11 +217,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define BUTTON_PIN 0   // If defined, this will be used for user button presses
 
 #ifndef USE_JTAG
-#define RESET_GPIO 14 // If defined, this pin will be used to reset the LORA radio
+#define RF95_RESET 14 // If defined, this pin will be used to reset the LORA radio
 #endif
-#define RF95_IRQ_GPIO 26
+#define RF95_IRQ 26
-#define DIO1_GPIO 35 // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
+#define RF95_DIO1 35 // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
-#define DIO2_GPIO 34 // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
+#define RF95_DIO2 34 // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
 #elif defined(TTGO_LORA_V1)
 // This string must exactly match the case used in release file names or the android updater won't work
 #define HW_VENDOR "ttgo-lora32-v1"
@@ -236,10 +239,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define LED_PIN 2     // If defined we will blink this LED
 #define BUTTON_PIN 0  // If defined, this will be used for user button presses
 
-#define RESET_GPIO 14    // If defined, this pin will be used to reset the LORA radio
+#define RF95_RESET 14 // If defined, this pin will be used to reset the LORA radio
-#define RF95_IRQ_GPIO 26 // IRQ line for the LORA radio
+#define RF95_IRQ 26   // IRQ line for the LORA radio
-#define DIO1_GPIO 35     // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
+#define RF95_DIO1 35  // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
-#define DIO2_GPIO 34     // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
+#define RF95_DIO2 34  // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
 #elif defined(TTGO_LORA_V2)
 // This string must exactly match the case used in release file names or the android updater won't work
 #define HW_VENDOR "ttgo-lora32-v2"
@@ -260,10 +263,10 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
     0 // If defined, this will be used for user button presses, if your board doesn't have a physical switch, you can wire one
 // between this pin and ground
 
-#define RESET_GPIO 14    // If defined, this pin will be used to reset the LORA radio
+#define RF95_RESET 14 // If defined, this pin will be used to reset the LORA radio
-#define RF95_IRQ_GPIO 26 // IRQ line for the LORA radio
+#define RF95_IRQ 26   // IRQ line for the LORA radio
-#define DIO1_GPIO 35     // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
+#define RF95_DIO1 35  // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
-#define DIO2_GPIO 34     // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
+#define RF95_DIO2 34  // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
 #endif
 
 #ifdef ARDUINO_NRF52840_PCA10056
@@ -275,14 +278,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #undef LED_INVERTED
 #define LED_INVERTED 1
 
-// Uncomment to confirm if we can build the RF95 driver for NRF52
-#if 0
-#define RESET_GPIO 14    // If defined, this pin will be used to reset the LORA radio
-#define RF95_IRQ_GPIO 26 // IRQ line for the LORA radio
-#define DIO1_GPIO 35     // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
-#define DIO2_GPIO 34     // DIO1 & DIO2 are not currently used, but they must be assigned to a pin number
-#endif
-
 #elif defined(ARDUINO_NRF52840_PPR)
 
 #define HW_VENDOR "ppr"

src/main.cpp

@@ -308,7 +308,7 @@ void setup()
 
     // MUST BE AFTER service.init, so we have our radio config settings (from nodedb init)
     RadioInterface *rIf =
-#if defined(RF95_IRQ_GPIO)
+#if defined(RF95_IRQ)
         // new CustomRF95(); old Radiohead based driver
         new RF95Interface(RF95_NSS, RF95_IRQ, RF95_RESET, SPI);
 #elif defined(SX1262_CS)

src/mesh/RF95Interface.cpp

@@ -24,8 +24,14 @@ bool RF95Interface::init()
         power = MAX_POWER;
 
     iface = lora = new RadioLibRF95(&module);
+
+#ifdef RF95_TCXO
+    pinMode(RF95_TCXO, OUTPUT);
+    digitalWrite(RF95_TCXO, 1);
+#endif
+
     int res = lora->begin(freq, bw, sf, cr, syncWord, power, currentLimit, preambleLength);
-    DEBUG_MSG("LORA init result %d\n", res);
+    DEBUG_MSG("RF95 init result %d\n", res);
 
     if (res == ERR_NONE)
         res = lora->setCRC(SX126X_LORA_CRC_ON);

src/mesh/RadioLibRF95.cpp

@@ -3,6 +3,10 @@
 #define RF95_CHIP_VERSION 0x12
 #define RF95_ALT_VERSION 0x11 // Supposedly some versions of the chip have id 0x11
 
+// From datasheet but radiolib doesn't know anything about this
+#define SX127X_REG_TCXO 0x4B
+
+
 RadioLibRF95::RadioLibRF95(Module *mod) : SX1278(mod) {}
 
 int16_t RadioLibRF95::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_t syncWord, int8_t power, uint8_t currentLimit,
@@ -18,6 +22,11 @@ int16_t RadioLibRF95::begin(float freq, float bw, uint8_t sf, uint8_t cr, uint8_
     state = config();
     RADIOLIB_ASSERT(state);
 
+#ifdef RF95_TCXO
+    state = _mod->SPIsetRegValue(SX127X_REG_TCXO, 0x10 | _mod->SPIgetRegValue(SX127X_REG_TCXO));
+    RADIOLIB_ASSERT(state);
+#endif
+
     // configure publicly accessible settings
     state = setFrequency(freq);
     RADIOLIB_ASSERT(state);

src/mesh/SX1262Interface.cpp

@@ -33,7 +33,7 @@ bool SX1262Interface::init()
     if (power > 22) // This chip has lower power limits than some
         power = 22;
     int res = lora.begin(freq, bw, sf, cr, syncWord, power, currentLimit, preambleLength, tcxoVoltage, useRegulatorLDO);
-    DEBUG_MSG("LORA init result %d\n", res);
+    DEBUG_MSG("SX1262 init result %d\n", res);
 
 #ifdef SX1262_TXEN
     // lora.begin sets Dio2 as RF switch control, which is not true if we are manually controlling RX and TX

src/nrf52/main-nrf52.cpp

@@ -52,8 +52,9 @@ void setBluetoothEnable(bool on)
     if (on != bleOn) {
         if (on) {
             if (!nrf52Bluetooth) {
-                nrf52Bluetooth = new NRF52Bluetooth();
+                DEBUG_MSG("DISABLING NRF52 BLUETOOTH WHILE DEBUGGING\n");
-                nrf52Bluetooth->setup();
+                //nrf52Bluetooth = new NRF52Bluetooth();
+                //nrf52Bluetooth->setup();
             }
         } else {
             DEBUG_MSG("FIXME: implement BLE disable\n");