UART base address

ece_student · January 26, 2017, 6:37am

Hi,

I have a question for UART base address.
For pixhawk, I found that uartA = console = serial 0 and uartC = telemtry 1 (mavlink I think) = serial 1.
However, I don’t know their memory address out of following lists.
STM32_USART1_BASE 0x40011000 /* 0x40011000-0x400113ff: USART1 /
STM32_USART2_BASE 0x40004400 / 0x40004400-0x400047ff: USART2 /
STM32_USART3_BASE 0x40004800 / 0x40004800-0x40004bff: USART3 /
STM32_UART4_BASE 0x40004c00 / 0x40004c00-0x40004fff: UART4 /
STM32_UART5_BASE 0x40005000 / 0x40005000-0x400053ff: UART5 /
STM32_USART6_BASE 0x40011400 / 0x40011400-0x400117ff: USART6 /
STM32_UART7_BASE 0x40007800 / 0x40007800-0x40007bff: UART7 /
STM32_UART8_BASE 0x40007c00 / 0x40007c00-0x40007fff: UART8 */

Could you let me know mapped addresses of uarts (for console and mavlink) ?

Also, if you have such information on pixracer (also for console and mavlink), please let me know.

metinburak · January 26, 2017, 8:27am

Only the NuttX RTOS

knows the real (low level) device addresses which are in
b.com/PX4/NuttX/blob/8b81cf5c7ece0c228eaaea3e9d8e667fc4d21a06/arch/arm/src/stm32/chip/stm32f40xxx_memorymap.h#L159" target="_blank" rel="nofollow noopener">github.com hub.com/PX4/NuttX/blob/8b81cf5c7ece0c228eaaea3e9d8e667fc4d21a06/arch/arm/src/stm32/chip/stm32f40xxx_memorymap.h#L159" target="_blank" rel="nofollow noopener">PX4/NuttX/blob/8b81cf5c7ece0c228eaaea3e9d8e667fc4d21a06/arch/arm/src/stm32/chip/stm32f40xxx_memorymap.h#L159 class="lang-h">

This is the main philosophy of operating systems, the user shouldn’t deal with too much ioctl.

But in userspace, these devices are mapped into file descriptors under /dev like /dev/ttyS0, /dev/ttyS1 and so on. The OS maps the low level addresses into file pointers’ address in RAM, so u don’t have to deal with the virtual addresses, u have to deal with only the device files.

If u wanna know which uart is used for temlemetry and so on, u have to check the RTOS init script:

github.com

PX4/Firmware/blob/master/ROMFS/px4fmu_common/init.d/rcS#L15


#set -x
# PX4FMU startup script.
#
# NOTE: environment variable references:
#    If the dollar sign ('$') is followed by a left bracket ('{') then the
#    variable name is terminated with the right bracket character ('}').
#    Otherwise, the variable name goes to the end of the argument.
#
#
# NOTE: COMMENT LINES ARE REMOVED BEFORE STORED IN ROMFS.
#
#------------------------------------------------------------------------------


#
# Set default paramter values.
# Do not add intra word spaces
# it wastes flash
#
set AUX_MODE pwm
set DATAMAN_OPT ""
set FAILSAFE none

github.com

PX4/Firmware/blob/master/ROMFS/px4fmu_common/init.d/rcS#L771


#!/bin/sh
# Un comment and use set +e to ignore and set -e to enable 'exit on error control'
set +e
# Un comment the line below to help debug scripts by printing a trace of the script commands
#set -x
# PX4FMU startup script.
#
# NOTE: environment variable references:
#    If the dollar sign ('$') is followed by a left bracket ('{') then the
#    variable name is terminated with the right bracket character ('}').
#    Otherwise, the variable name goes to the end of the argument.
#
#
# NOTE: COMMENT LINES ARE REMOVED BEFORE STORED IN ROMFS.
#
#------------------------------------------------------------------------------


#
# Set default paramter values.
# Do not add intra word spaces
# it wastes flash
#
set AUX_MODE pwm
set DATAMAN_OPT ""
set FAILSAFE none
set FAILSAFE_AUX none
set FCONFIG /fs/microsd/etc/config.txt
set FEXTRAS /fs/microsd/etc/extras.txt
set FMU_ARGS ""
set FMU_MODE pwm
set FRC /fs/microsd/etc/rc.txt
set IO_PRESENT no
set IOFW "/etc/extras/px4_io-v2_default.bin"
set IO_PRESENT no
set LOG_FILE /fs/microsd/bootlog.txt
set LOGGER_ARGS ""
set LOGGER_BUF  14
set MAV_TYPE none
set MIXER none
set MIXER_AUX none
set MIXER_FILE none
set MK_MODE none
set MKBLCTRL_ARG ""
set OUTPUT_MODE none
set PARAM_FILE /fs/microsd/params
set PWM_AUX_DISARMED p:PWM_AUX_DISARMED
set PWM_AUX_MAX p:PWM_AUX_MAX
set PWM_AUX_MIN p:PWM_AUX_MIN
set PWM_AUX_OUT none
set PWM_AUX_RATE p:PWM_AUX_RATE
set PWM_DISARMED p:PWM_DISARMED
set PWM_MAX p:PWM_MAX
set PWM_MIN p:PWM_MIN
set PWM_OUT none
set PWM_RATE p:PWM_RATE
set SDCARD_MIXERS_PATH /fs/microsd/etc/mixers
set USE_IO no
set VEHICLE_TYPE none


# Airframe parameter versioning: airframe maintainers can set this in the
# airframe startup script, and then increase it by one whenever an airframe
# parameter is updated - it will ensure that these parameters will be updated
# when the firmware is flashed.
set PARAM_DEFAULTS_VER 1


#
# Mount the procfs.
#
mount -t procfs /proc


#
# Start CDC/ACM serial driver.
#
sercon


#
# Print full system version.
#
ver all


#
# Start the ORB (first app to start)
# tone_alarm and tune_control
# is dependent.
#
uorb start


#
# Try to mount the microSD card.
#
# REBOOTWORK this needs to start after the flight control loop.
if mount -t vfat /dev/mmcsd0 /fs/microsd
then
	if hardfault_log check
	then
		# Error tune.
		tune_control play -t 2
		if hardfault_log commit
		then
			hardfault_log reset
		fi
	else
		# Play the startup tune.
		tune_control play -t 1
	fi
else
	# tune SD_INIT
	tune_control play -t 16
	if mkfatfs /dev/mmcsd0
	then
		if mount -t vfat /dev/mmcsd0 /fs/microsd
		then
			echo "INFO [init] card formatted"
		else
			tune_control play -t 17
			echo "ERROR [init] format failed"
			set LOG_FILE /dev/null
		fi
	else
		set LOG_FILE /dev/null
	fi
fi


# AEROCORE2 shouldn't have an sd card and CF2 may optionally have an sd card.
if ! ver hwcmp BITCRAZE_CRAZYFLIE GUMSTIX_AEROCORE2
then
	# Run no SD alarm.
	if [ $LOG_FILE = /dev/null ]
	then
		# tune Make FS MBAGP
		tune_control play -t 2
	fi
fi


#
# Look for an init script on the microSD card.
# Disable autostart if the script found.
#
if [ -f $FRC ]
then
	sh $FRC
else


	#
	# Set the parameter file if mtd starts successfully.
	#
	if mtd start
	then
		set PARAM_FILE /fs/mtd_params
	fi


	#
	# Load parameters.
	#
	param select $PARAM_FILE
	if ! param load
	then
		param reset
	fi


	#
	# Set AUTOCNF flag to use it in AUTOSTART scripts.
	#
	if param compare SYS_AUTOCONFIG 1
	then
		# Wipe out params except RC*, flight modes, total flight time, accel cal, gyro cal
		param reset_nostart RC* COM_FLTMODE* LND_FLIGHT_T_* TC_* CAL_ACC* CAL_GYRO*
		set AUTOCNF yes
	else
		if param compare SYS_AUTOCONFIG 2
		then
			set AUTOCNF yes
		else
			set AUTOCNF no
		fi
	fi


	#
	# Optional board defaults: rc.board_defaults
	#
	set BOARD_RC_DEFAULTS /etc/init.d/rc.board_defaults
	if [ -f $BOARD_RC_DEFAULTS ]
	then
		echo "Board defaults: ${BOARD_RC_DEFAULTS}"
		sh $BOARD_RC_DEFAULTS
	fi
	unset BOARD_RC_DEFAULTS


	#
	# Waypoint storage.
	# REBOOTWORK this needs to start in parallel.
	#
	dataman start $DATAMAN_OPT


	#
	# Start the socket communication send_event handler.
	#
	send_event start


	#
	# Start the resource load monitor.
	#
	load_mon start


	#
	# Start system state indicator.
	#
	rgbled start
	rgbled_ncp5623c start
	rgbled_pwm start


	if blinkm start
	then
		blinkm systemstate
	fi


	#
	# Start the tone_alarm driver.
	# Needs to be started after the parameters are loaded (for CBRK_BUZZER).
	# Note that this will still play the already published startup tone.
	#
	tone_alarm start


	if param compare SYS_FMU_TASK 1
	then
		set FMU_ARGS "-t"
	fi


	#
	# Set parameters and env variables for selected AUTOSTART.
	#
	if ! param compare SYS_AUTOSTART 0
	then
		sh /etc/init.d/rc.autostart
	fi


	#
	# Override parameters from user configuration file.
	#
	if [ -f $FCONFIG ]
	then
		echo "Custom: ${FCONFIG}"
		sh $FCONFIG
	fi


	#
	# If autoconfig parameter was set, reset it and save parameters.
	#
	if [ $AUTOCNF = yes ]
	then
		param set SYS_AUTOCONFIG 0
	fi


	#
	# Check if PX4IO present and update firmware if needed.
	# Assumption IOFW set to firmware file and IO_PRESENT = no
	#


	if [ -f $IOFW ]
	then
		# Check for the mini using build with px4io fw file
		# but not a px4IO
		if ver hwtypecmp V540
		then
			param set SYS_USE_IO 0
		else
			if px4io checkcrc ${IOFW}
			then
				set IO_PRESENT yes
			else
				# tune Program PX4IO
				tune_control play -t 18


				if px4io start
				then
					# Try to safety px4 io so motor outputs don't go crazy.
					if ! px4io safety_on
					then
						# px4io did not respond to the safety command.
						px4io stop
					fi
				fi


				if px4io forceupdate 14662 ${IOFW}
				then
					usleep 10000
					tune_control stop
					if px4io checkcrc ${IOFW}
					then
						echo "PX4IO CRC OK after updating" >> $LOG_FILE
						#tune MLL8CDE Program PX4IO success
						tune_control play -t 19
						set IO_PRESENT yes
					fi
				fi


				if [ $IO_PRESENT = no ]
				then
					echo "PX4IO update failed" >> $LOG_FILE
					# Error tune.
					tune_control play -t 20
				fi
			fi
		fi
	fi


	#
	# Set USE_IO flag.
	#
	if param compare SYS_USE_IO 1
	then
		set USE_IO yes
	fi


	if [ $USE_IO = yes -a $IO_PRESENT = no ]
	then
		echo "PX4IO not found" >> $LOG_FILE
		# Error tune.
		tune_control play -t 2
	fi


	if [ $IO_PRESENT = no -o $USE_IO = no ]
	then
		rc_input start
	fi


	#
	# Sensors System (start before Commander so Preflight checks are properly run).
	# Commander needs to be this early for in-air-restarts.
	#
	if param greater SYS_HITL 0
	then
		set OUTPUT_MODE hil
		sensors start -h
		commander start --hil
		# disable GPS
		param set GPS_1_CONFIG 0


		# start the simulator in hardware if needed
		if param compare SYS_HITL 2
		then
			sih start
		fi


	else
		#
		# board sensors: rc.sensors
		#
		set BOARD_RC_SENSORS /etc/init.d/rc.board_sensors
		if [ -f $BOARD_RC_SENSORS ]
		then
			echo "Board sensors: ${BOARD_RC_SENSORS}"
			sh $BOARD_RC_SENSORS
		fi
		unset BOARD_RC_SENSORS




		sh /etc/init.d/rc.sensors
		commander start
	fi


	# Sensors on the PWM interface bank.
	if param compare SENS_EN_LL40LS 1
	then
		# Clear pins 5 and 6.
		set FMU_MODE pwm4
		set AUX_MODE pwm4
	fi


	if param greater TRIG_MODE 0
	then
		# We ONLY support trigger on pins 5 and 6 when simultanously using AUX for actuator output.
		if param compare TRIG_PINS 56
		then
			# clear pins 5 and 6
			set FMU_MODE pwm4
			set AUX_MODE pwm4
		else
			set FMU_MODE none
			set AUX_MODE none
		fi


		camera_trigger start
		camera_feedback start
	fi


	#
	# Check if UAVCAN is enabled, default to it for ESCs.
	#
	if param greater UAVCAN_ENABLE 0
	then
		# Start core UAVCAN module.
		if uavcan start
		then
			if param greater UAVCAN_ENABLE 1
			then
				# Start UAVCAN firmware update server and dynamic node ID allocation server.
				uavcan start fw


				if param greater UAVCAN_ENABLE 2
				then
					set OUTPUT_MODE uavcan_esc
				fi
			fi
		else
			# Error tune.
			tune_control play -t 2
		fi
	fi


	#
	# Start mavlink streams that are not configurable (e.g. on USB).
	#
	sh /etc/init.d/rc.mavlink


	#
	# Start UART/Serial device drivers.
	# Note: rc.serial is auto-generated from Tools/serial/generate_config.py
	#
	sh /etc/init.d/rc.serial


	#
	# Configure vehicle type specific parameters.
	# Note: rc.vehicle_setup is the entry point for rc.interface,
	#       rc.fw_apps, rc.mc_apps, rc.ugv_apps, and rc.vtol_apps.
	#
	sh /etc/init.d/rc.vehicle_setup


	# Camera capture driver
	if param greater CAM_CAP_FBACK 0
	then
		if camera_capture start
		then
			camera_capture on
		fi
	fi


	#
	# Start the navigator.
	#
	navigator start


	#
	# Start the standalone wind estimator.
	#
	if param compare WEST_EN 1
	then
		wind_estimator start
	fi


	#
	# Start a thermal calibration if required.
	#
	sh /etc/init.d/rc.thermal_cal


	#
	# Start vmount to control mounts such as gimbals, disabled by default.
	#
	if ! param compare MNT_MODE_IN -1
	then
		vmount start
	fi


	# Check for flow sensor, launched as a background task to scan
	px4flow start &


	#
	# Optional board supplied extras: rc.board_extras
	#
	set BOARD_RC_EXTRAS /etc/init.d/rc.board_extras
	if [ -f $BOARD_RC_EXTRAS ]
	then
		echo "Board extras: ${BOARD_RC_EXTRAS}"
		sh $BOARD_RC_EXTRAS
	fi
	unset BOARD_RC_EXTRAS


	#
	# Start any custom addons from the sdcard.
	#
	if [ -f $FEXTRAS ]
	then
		echo "Addons script: ${FEXTRAS}"
		sh $FEXTRAS
	fi


	#
	# Start the logger.
	#
	sh /etc/init.d/rc.logging




	if ! param compare SYS_PARAM_VER ${PARAM_DEFAULTS_VER}
	then
		echo "Switched to different parameter version. Resetting parameters."
		param set SYS_PARAM_VER ${PARAM_DEFAULTS_VER}
		param set SYS_AUTOCONFIG 2
		param save
		reboot
	fi


#
# End of autostart.
#
fi


#
# Unset all script parameters to free RAM.
#
unset AUTOCNF
unset AUX_MODE
unset DATAMAN_OPT
unset FAILSAFE
unset FAILSAFE_AUX
unset FCONFIG
unset FEXTRAS
unset FMU_ARGS
unset FMU_MODE
unset FRC
unset IO_PRESENT
unset IOFW
unset LOG_FILE
unset LOGGER_ARGS
unset LOGGER_BUF
unset MAV_TYPE
unset MIXER
unset MIXER_AUX
unset MIXER_FILE
unset MK_MODE
unset MKBLCTRL_ARG
unset OUTPUT_MODE
unset PARAM_DEFAULTS_VER
unset PARAM_FILE
unset PWM_AUX_DISARMED
unset PWM_AUX_MAX
unset PWM_AUX_MIN
unset PWM_AUX_OUT
unset PWM_AUX_RATE
unset PWM_DISARMED
unset PWM_MAX
unset PWM_MIN
unset PWM_OUT
unset PWM_RATE
unset SDCARD_MIXERS_PATH
unset USE_IO
unset VEHICLE_TYPE


#
# Boot is complete, inform MAVLink app(s) that the system is now fully up and running.
#
mavlink boot_complete

This file has been truncated. show original

github.com

PX4/Firmware/blob/master/ROMFS/px4fmu_common/init.d/rcS#L585


#!/bin/sh
# Un comment and use set +e to ignore and set -e to enable 'exit on error control'
set +e
# Un comment the line below to help debug scripts by printing a trace of the script commands
#set -x
# PX4FMU startup script.
#
# NOTE: environment variable references:
#    If the dollar sign ('$') is followed by a left bracket ('{') then the
#    variable name is terminated with the right bracket character ('}').
#    Otherwise, the variable name goes to the end of the argument.
#
#
# NOTE: COMMENT LINES ARE REMOVED BEFORE STORED IN ROMFS.
#
#------------------------------------------------------------------------------


#
# Set default paramter values.
# Do not add intra word spaces
# it wastes flash
#
set AUX_MODE pwm
set DATAMAN_OPT ""
set FAILSAFE none
set FAILSAFE_AUX none
set FCONFIG /fs/microsd/etc/config.txt
set FEXTRAS /fs/microsd/etc/extras.txt
set FMU_ARGS ""
set FMU_MODE pwm
set FRC /fs/microsd/etc/rc.txt
set IO_PRESENT no
set IOFW "/etc/extras/px4_io-v2_default.bin"
set IO_PRESENT no
set LOG_FILE /fs/microsd/bootlog.txt
set LOGGER_ARGS ""
set LOGGER_BUF  14
set MAV_TYPE none
set MIXER none
set MIXER_AUX none
set MIXER_FILE none
set MK_MODE none
set MKBLCTRL_ARG ""
set OUTPUT_MODE none
set PARAM_FILE /fs/microsd/params
set PWM_AUX_DISARMED p:PWM_AUX_DISARMED
set PWM_AUX_MAX p:PWM_AUX_MAX
set PWM_AUX_MIN p:PWM_AUX_MIN
set PWM_AUX_OUT none
set PWM_AUX_RATE p:PWM_AUX_RATE
set PWM_DISARMED p:PWM_DISARMED
set PWM_MAX p:PWM_MAX
set PWM_MIN p:PWM_MIN
set PWM_OUT none
set PWM_RATE p:PWM_RATE
set SDCARD_MIXERS_PATH /fs/microsd/etc/mixers
set USE_IO no
set VEHICLE_TYPE none


# Airframe parameter versioning: airframe maintainers can set this in the
# airframe startup script, and then increase it by one whenever an airframe
# parameter is updated - it will ensure that these parameters will be updated
# when the firmware is flashed.
set PARAM_DEFAULTS_VER 1


#
# Mount the procfs.
#
mount -t procfs /proc


#
# Start CDC/ACM serial driver.
#
sercon


#
# Print full system version.
#
ver all


#
# Start the ORB (first app to start)
# tone_alarm and tune_control
# is dependent.
#
uorb start


#
# Try to mount the microSD card.
#
# REBOOTWORK this needs to start after the flight control loop.
if mount -t vfat /dev/mmcsd0 /fs/microsd
then
	if hardfault_log check
	then
		# Error tune.
		tune_control play -t 2
		if hardfault_log commit
		then
			hardfault_log reset
		fi
	else
		# Play the startup tune.
		tune_control play -t 1
	fi
else
	# tune SD_INIT
	tune_control play -t 16
	if mkfatfs /dev/mmcsd0
	then
		if mount -t vfat /dev/mmcsd0 /fs/microsd
		then
			echo "INFO [init] card formatted"
		else
			tune_control play -t 17
			echo "ERROR [init] format failed"
			set LOG_FILE /dev/null
		fi
	else
		set LOG_FILE /dev/null
	fi
fi


# AEROCORE2 shouldn't have an sd card and CF2 may optionally have an sd card.
if ! ver hwcmp BITCRAZE_CRAZYFLIE GUMSTIX_AEROCORE2
then
	# Run no SD alarm.
	if [ $LOG_FILE = /dev/null ]
	then
		# tune Make FS MBAGP
		tune_control play -t 2
	fi
fi


#
# Look for an init script on the microSD card.
# Disable autostart if the script found.
#
if [ -f $FRC ]
then
	sh $FRC
else


	#
	# Set the parameter file if mtd starts successfully.
	#
	if mtd start
	then
		set PARAM_FILE /fs/mtd_params
	fi


	#
	# Load parameters.
	#
	param select $PARAM_FILE
	if ! param load
	then
		param reset
	fi


	#
	# Set AUTOCNF flag to use it in AUTOSTART scripts.
	#
	if param compare SYS_AUTOCONFIG 1
	then
		# Wipe out params except RC*, flight modes, total flight time, accel cal, gyro cal
		param reset_nostart RC* COM_FLTMODE* LND_FLIGHT_T_* TC_* CAL_ACC* CAL_GYRO*
		set AUTOCNF yes
	else
		if param compare SYS_AUTOCONFIG 2
		then
			set AUTOCNF yes
		else
			set AUTOCNF no
		fi
	fi


	#
	# Optional board defaults: rc.board_defaults
	#
	set BOARD_RC_DEFAULTS /etc/init.d/rc.board_defaults
	if [ -f $BOARD_RC_DEFAULTS ]
	then
		echo "Board defaults: ${BOARD_RC_DEFAULTS}"
		sh $BOARD_RC_DEFAULTS
	fi
	unset BOARD_RC_DEFAULTS


	#
	# Waypoint storage.
	# REBOOTWORK this needs to start in parallel.
	#
	dataman start $DATAMAN_OPT


	#
	# Start the socket communication send_event handler.
	#
	send_event start


	#
	# Start the resource load monitor.
	#
	load_mon start


	#
	# Start system state indicator.
	#
	rgbled start
	rgbled_ncp5623c start
	rgbled_pwm start


	if blinkm start
	then
		blinkm systemstate
	fi


	#
	# Start the tone_alarm driver.
	# Needs to be started after the parameters are loaded (for CBRK_BUZZER).
	# Note that this will still play the already published startup tone.
	#
	tone_alarm start


	if param compare SYS_FMU_TASK 1
	then
		set FMU_ARGS "-t"
	fi


	#
	# Set parameters and env variables for selected AUTOSTART.
	#
	if ! param compare SYS_AUTOSTART 0
	then
		sh /etc/init.d/rc.autostart
	fi


	#
	# Override parameters from user configuration file.
	#
	if [ -f $FCONFIG ]
	then
		echo "Custom: ${FCONFIG}"
		sh $FCONFIG
	fi


	#
	# If autoconfig parameter was set, reset it and save parameters.
	#
	if [ $AUTOCNF = yes ]
	then
		param set SYS_AUTOCONFIG 0
	fi


	#
	# Check if PX4IO present and update firmware if needed.
	# Assumption IOFW set to firmware file and IO_PRESENT = no
	#


	if [ -f $IOFW ]
	then
		# Check for the mini using build with px4io fw file
		# but not a px4IO
		if ver hwtypecmp V540
		then
			param set SYS_USE_IO 0
		else
			if px4io checkcrc ${IOFW}
			then
				set IO_PRESENT yes
			else
				# tune Program PX4IO
				tune_control play -t 18


				if px4io start
				then
					# Try to safety px4 io so motor outputs don't go crazy.
					if ! px4io safety_on
					then
						# px4io did not respond to the safety command.
						px4io stop
					fi
				fi


				if px4io forceupdate 14662 ${IOFW}
				then
					usleep 10000
					tune_control stop
					if px4io checkcrc ${IOFW}
					then
						echo "PX4IO CRC OK after updating" >> $LOG_FILE
						#tune MLL8CDE Program PX4IO success
						tune_control play -t 19
						set IO_PRESENT yes
					fi
				fi


				if [ $IO_PRESENT = no ]
				then
					echo "PX4IO update failed" >> $LOG_FILE
					# Error tune.
					tune_control play -t 20
				fi
			fi
		fi
	fi


	#
	# Set USE_IO flag.
	#
	if param compare SYS_USE_IO 1
	then
		set USE_IO yes
	fi


	if [ $USE_IO = yes -a $IO_PRESENT = no ]
	then
		echo "PX4IO not found" >> $LOG_FILE
		# Error tune.
		tune_control play -t 2
	fi


	if [ $IO_PRESENT = no -o $USE_IO = no ]
	then
		rc_input start
	fi


	#
	# Sensors System (start before Commander so Preflight checks are properly run).
	# Commander needs to be this early for in-air-restarts.
	#
	if param greater SYS_HITL 0
	then
		set OUTPUT_MODE hil
		sensors start -h
		commander start --hil
		# disable GPS
		param set GPS_1_CONFIG 0


		# start the simulator in hardware if needed
		if param compare SYS_HITL 2
		then
			sih start
		fi


	else
		#
		# board sensors: rc.sensors
		#
		set BOARD_RC_SENSORS /etc/init.d/rc.board_sensors
		if [ -f $BOARD_RC_SENSORS ]
		then
			echo "Board sensors: ${BOARD_RC_SENSORS}"
			sh $BOARD_RC_SENSORS
		fi
		unset BOARD_RC_SENSORS




		sh /etc/init.d/rc.sensors
		commander start
	fi


	# Sensors on the PWM interface bank.
	if param compare SENS_EN_LL40LS 1
	then
		# Clear pins 5 and 6.
		set FMU_MODE pwm4
		set AUX_MODE pwm4
	fi


	if param greater TRIG_MODE 0
	then
		# We ONLY support trigger on pins 5 and 6 when simultanously using AUX for actuator output.
		if param compare TRIG_PINS 56
		then
			# clear pins 5 and 6
			set FMU_MODE pwm4
			set AUX_MODE pwm4
		else
			set FMU_MODE none
			set AUX_MODE none
		fi


		camera_trigger start
		camera_feedback start
	fi


	#
	# Check if UAVCAN is enabled, default to it for ESCs.
	#
	if param greater UAVCAN_ENABLE 0
	then
		# Start core UAVCAN module.
		if uavcan start
		then
			if param greater UAVCAN_ENABLE 1
			then
				# Start UAVCAN firmware update server and dynamic node ID allocation server.
				uavcan start fw


				if param greater UAVCAN_ENABLE 2
				then
					set OUTPUT_MODE uavcan_esc
				fi
			fi
		else
			# Error tune.
			tune_control play -t 2
		fi
	fi


	#
	# Start mavlink streams that are not configurable (e.g. on USB).
	#
	sh /etc/init.d/rc.mavlink


	#
	# Start UART/Serial device drivers.
	# Note: rc.serial is auto-generated from Tools/serial/generate_config.py
	#
	sh /etc/init.d/rc.serial


	#
	# Configure vehicle type specific parameters.
	# Note: rc.vehicle_setup is the entry point for rc.interface,
	#       rc.fw_apps, rc.mc_apps, rc.ugv_apps, and rc.vtol_apps.
	#
	sh /etc/init.d/rc.vehicle_setup


	# Camera capture driver
	if param greater CAM_CAP_FBACK 0
	then
		if camera_capture start
		then
			camera_capture on
		fi
	fi


	#
	# Start the navigator.
	#
	navigator start


	#
	# Start the standalone wind estimator.
	#
	if param compare WEST_EN 1
	then
		wind_estimator start
	fi


	#
	# Start a thermal calibration if required.
	#
	sh /etc/init.d/rc.thermal_cal


	#
	# Start vmount to control mounts such as gimbals, disabled by default.
	#
	if ! param compare MNT_MODE_IN -1
	then
		vmount start
	fi


	# Check for flow sensor, launched as a background task to scan
	px4flow start &


	#
	# Optional board supplied extras: rc.board_extras
	#
	set BOARD_RC_EXTRAS /etc/init.d/rc.board_extras
	if [ -f $BOARD_RC_EXTRAS ]
	then
		echo "Board extras: ${BOARD_RC_EXTRAS}"
		sh $BOARD_RC_EXTRAS
	fi
	unset BOARD_RC_EXTRAS


	#
	# Start any custom addons from the sdcard.
	#
	if [ -f $FEXTRAS ]
	then
		echo "Addons script: ${FEXTRAS}"
		sh $FEXTRAS
	fi


	#
	# Start the logger.
	#
	sh /etc/init.d/rc.logging




	if ! param compare SYS_PARAM_VER ${PARAM_DEFAULTS_VER}
	then
		echo "Switched to different parameter version. Resetting parameters."
		param set SYS_PARAM_VER ${PARAM_DEFAULTS_VER}
		param set SYS_AUTOCONFIG 2
		param save
		reboot
	fi


#
# End of autostart.
#
fi


#
# Unset all script parameters to free RAM.
#
unset AUTOCNF
unset AUX_MODE
unset DATAMAN_OPT
unset FAILSAFE
unset FAILSAFE_AUX
unset FCONFIG
unset FEXTRAS
unset FMU_ARGS
unset FMU_MODE
unset FRC
unset IO_PRESENT
unset IOFW
unset LOG_FILE
unset LOGGER_ARGS
unset LOGGER_BUF
unset MAV_TYPE
unset MIXER
unset MIXER_AUX
unset MIXER_FILE
unset MK_MODE
unset MKBLCTRL_ARG
unset OUTPUT_MODE
unset PARAM_DEFAULTS_VER
unset PARAM_FILE
unset PWM_AUX_DISARMED
unset PWM_AUX_MAX
unset PWM_AUX_MIN
unset PWM_AUX_OUT
unset PWM_AUX_RATE
unset PWM_DISARMED
unset PWM_MAX
unset PWM_MIN
unset PWM_OUT
unset PWM_RATE
unset SDCARD_MIXERS_PATH
unset USE_IO
unset VEHICLE_TYPE


#
# Boot is complete, inform MAVLink app(s) that the system is now fully up and running.
#
mavlink boot_complete

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