Board support: RAK3401+RAK13302 1-watt (#8140)

* Add RAK3401 variant files

* Add SPI configuration for RAK3401 and RAK13302 variants

* Refactor SPI pin configuration and clean up variant definitions for RAK3401

* Add TX_GAIN_LORA for RAK13302 Power Amp

* Fix merge

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Tom Fifield <tom@tomfifield.net>
Co-authored-by: Manuel <71137295+mverch67@users.noreply.github.com>

src/configuration.h

@@ -126,6 +126,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define TX_GAIN_LORA 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 7
 #endif
 
+#ifdef RAK13302
+#define NUM_PA_POINTS 22
+#define TX_GAIN_LORA 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8
+#endif
+
 // Default system gain to 0 if not defined
 #ifndef TX_GAIN_LORA
 #define TX_GAIN_LORA 0

src/main.cpp

@@ -841,7 +841,14 @@ void setup()
         SPI.begin();
     }
 #elif !defined(ARCH_ESP32) // ARCH_RP2040
+#if defined(RAK3401) || defined(RAK13302)
+    pinMode(WB_IO2, OUTPUT);
+    digitalWrite(WB_IO2, HIGH);
+    SPI1.setPins(LORA_MISO, LORA_SCK, LORA_MOSI);
+    SPI1.begin();
+#else
     SPI.begin();
+#endif
 #else
         // ESP32
 #if defined(HW_SPI1_DEVICE)