AP_HAL: add HAL_HAVE_BOARD_VOLTAGE

libraries/AP_HAL/board/empty.h

@@ -9,3 +9,4 @@
 #define HAL_COMPASS_DEFAULT HAL_COMPASS_HIL
 #define CONFIG_HAL_BOARD_SUBTYPE HAL_BOARD_SUBTYPE_NONE
 
+#define HAL_HAVE_BOARD_VOLTAGE 1

libraries/AP_HAL/board/linux.h

@@ -349,3 +349,4 @@
 #define HAL_OPTFLOW_PX4FLOW_I2C_BUS 1
 #endif
 
+#define HAL_HAVE_BOARD_VOLTAGE 1

libraries/AP_HAL/board/px4.h

@@ -74,6 +74,7 @@
 #ifdef CONFIG_ARCH_BOARD_PX4FMU_V1
 #define HAL_BARO_MS5611_I2C_ADDR 0x76
 #define HAL_BARO_MS5611_I2C_BUS  0
+#define HAL_HAVE_BOARD_VOLTAGE 0
 #endif
 
 /* aerofc-v1 */
@@ -83,9 +84,14 @@
 #define HAL_COMPASS_IST8310_I2C_ADDR 0x0E
 #define HAL_COMPASS_IST8310_I2C_BUS 1
 #define HAL_SERIAL0_BAUD_DEFAULT 460800
+#define HAL_HAVE_BOARD_VOLTAGE 0
 #endif
 
 /* default values */
 #ifndef HAL_SERIAL0_BAUD_DEFAULT
 #define HAL_SERIAL0_BAUD_DEFAULT 115200
 #endif
+
+#ifndef HAL_HAVE_BOARD_VOLTAGE
+#define HAL_HAVE_BOARD_VOLTAGE 1
+#endif

libraries/AP_HAL/board/qurt.h

@@ -13,3 +13,4 @@
 #define HAL_OS_POSIX_IO 1
 #define HAL_SERIAL0_BAUD_DEFAULT 115200
 
+#define HAL_HAVE_BOARD_VOLTAGE 1

libraries/AP_HAL/board/sitl.h

@@ -18,3 +18,4 @@
 #define HAL_GPIO_LED_ON           LOW
 #define HAL_GPIO_LED_OFF          HIGH
 
+#define HAL_HAVE_BOARD_VOLTAGE 1

libraries/AP_HAL/board/vrbrain.h

@@ -44,3 +44,4 @@
 #define EXTERNAL_LED_MOTOR1       30    // Motor1 LED - AN8
 #define EXTERNAL_LED_MOTOR2       31    // Motor2 LED - AN12
 
+#define HAL_HAVE_BOARD_VOLTAGE 0