feat(tx15): support for KCX BT audio (#6777)

radio/src/targets/simu/audio_driver.cpp

@@ -29,6 +29,10 @@ bool audioHeadphoneDetect()
 }
 #endif
 
+void btAudioInit() {}
+bool btAudioLinked() { return false; }
+void btAudioConnect() {}
+
 #if !defined(SOFTWARE_VOLUME)
 static int _simu_volume = 0;
 

radio/src/targets/tx15/CMakeLists.txt

@@ -8,7 +8,8 @@ option(MODULE_SIZE_STD "Standard size TX Module" ON)
 option(LUA_MIXER "Enable LUA mixer/model scripts support" ON)
 option(DISK_CACHE "Enable SD card disk cache" ON)
 option(BLUETOOTH "FrSky BT module support" OFF)
-option(FLYSKY_GIMBAL "Serial gimbal support" ON)
+option(FLYSKY_GIMBAL "Serial gimbal support" OFF)
+option(KCX_BTAUDIO "KCX_BTAUDIO audio emitter installed" OFF)
 
 set(FIRMWARE_QSPI YES)
 set(FIRMWARE_FORMAT_UF2 YES)
@@ -32,6 +33,9 @@ set(FUNCTION_SWITCHES_WITH_RGB YES)
 # BT and serial gimbal share same UART
 if(BLUETOOTH)
   set(FLYSKY_GIMBAL OFF)
+  set(KCX_BTAUDIO OFF)
+elseif(KCX_BTAUDIO)
+  set(FLYSKY_GIMBAL OFF)
 endif()
 
 #option(STICK_DEAD_ZONE "Enable sticks dead zone" YES)
@@ -150,6 +154,13 @@ if(BLUETOOTH)
   )
 endif()
 
+if(KCX_BTAUDIO)
+  set(BOARD_COMMON_SRC ${BOARD_COMMON_SRC}
+    drivers/kcx_btaudio.cpp
+  )
+  add_definitions(-DKCX_BTAUDIO)
+endif()
+
 # Bootloader board library
 add_library(board_bl OBJECT EXCLUDE_FROM_ALL
   ${BOARD_COMMON_SRC}

radio/src/targets/tx15/hal.h

@@ -504,6 +504,9 @@ TIM17:	ROTARY_ENCODER_TIMER
 #define BT_TX_GPIO                          GPIO_PIN(GPIOB, 9)
 #define BT_RX_GPIO                          GPIO_PIN(GPIOB, 8)
 #define BT_EN_GPIO                          GPIO_PIN(GPIOH, 11)
+#elif defined(KCX_BTAUDIO)
+#define BTAUDIO_LINKED_GPIO                 GPIO_PIN(GPIOH, 11)
+#define BTAUDIO_CONNECT_GPIO                GPIO_PIN(GPIOB, 9)
 #endif
 
 #if defined(FLYSKY_GIMBAL)