Added iBUS on AUX Serial

- iBUS implementation
- changed default baud rate to 115200
- updated platformio.ini, the chip is now supported by Platformio

platformio.ini

@@ -15,9 +15,13 @@ src_dir     = Src
 
 ;=================== VARIANT SELECTION ==========================
 ;default_envs = VARIANT_DEBUG         ; DEFAULT Variant
+;default_envs = VARIANT_HOVERCAR      ; HOVERCAR Variant
 ;default_envs = VARIANT_HOVERBOARD    ; HOVERBOARD Variant
 ;================================================================
 
+[env]
+platform_packages = maxgerhardt/framework-spl@2.10300.0     ; Add GD32 support package: globally override framework-spl for all environments
+
 ;================================================================
 
 [env:VARIANT_DEBUG]
@@ -31,19 +35,41 @@ extra_scripts   = add_nanolib.py        ; adds nanolib to reduce printf memory f
 
 ; Serial Port settings (make sure the COM port is correct)
 monitor_port    = COM5
-monitor_speed   = 38400
+monitor_speed   = 115200
 
 build_flags =
     -IInc
     -ISrc 
     -DUSE_STDPERIPH_DRIVER
     -DGD32F130_150
-    -Wl,-T./GD32F130C6T_FLASH.ld
-    -Wl,-lc
-    -Wl,-lm
+    -T./GD32F130C6T_FLASH.ld
+    -lc
+    -lm
     -g -ggdb
     -D VARIANT_DEBUG
 
+
+;================================================================
+
+[env:VARIANT_HOVERCAR]
+platform        = ststm32
+board           = gd32f130c6
+debug_tool      = stlink
+upload_protocol = stlink
+framework       = spl
+extra_scripts   = add_nanolib.py
+
+build_flags =
+    -IInc
+    -ISrc 
+    -DUSE_STDPERIPH_DRIVER
+    -DGD32F130_150
+    -T./GD32F130C6T_FLASH.ld
+    -lc
+    -lm
+    -g -ggdb
+    -D VARIANT_HOVERCAR
+
 ;================================================================
 
 [env:VARIANT_HOVERBOARD]
@@ -59,9 +85,9 @@ build_flags =
     -ISrc 
     -DUSE_STDPERIPH_DRIVER
     -DGD32F130_150
-    -Wl,-T./GD32F130C6T_FLASH.ld
-    -Wl,-lc
-    -Wl,-lm
+    -T./GD32F130C6T_FLASH.ld
+    -lc
+    -lm
     -g -ggdb
     -D VARIANT_HOVERBOARD