SPRacingF3Mini - First cut of transponder system.

Implementation is DMA buffer based, just like the WS2811 LED Strip code,
so that there is minimal impact on flight performance.

Currently the code is mutually exclusive with the LED_STRIP code and
there is no means to set the transponder code.

src/main/main.c

@@ -65,6 +65,7 @@
 #include "io/ledstrip.h"
 #include "io/display.h"
 #include "io/asyncfatfs/asyncfatfs.h"
+#include "io/transponder_ir.h"
 
 #include "sensors/sensors.h"
 #include "sensors/sonar.h"
@@ -126,6 +127,7 @@ void ledStripInit(ledConfig_t *ledConfigsToUse, hsvColor_t *colorsToUse);
 void spektrumBind(rxConfig_t *rxConfig);
 const sonarHardware_t *sonarGetHardwareConfiguration(batteryConfig_t *batteryConfig);
 void sonarInit(const sonarHardware_t *sonarHardware);
+void transponderInit(uint8_t* transponderCode);
 
 #ifdef STM32F303xC
 // from system_stm32f30x.c
@@ -520,6 +522,12 @@ void init(void)
     }
 #endif
 
+#ifdef TRANSPONDER
+    transponderInit(masterConfig.transponderData);
+    transponderEnable();
+    transponderStartRepeating();
+#endif
+
 #ifdef USE_FLASHFS
 #ifdef NAZE
     if (hardwareRevision == NAZE32_REV5) {