diff options
Diffstat (limited to 'ROMFS')
-rw-r--r-- | ROMFS/px4fmu_common/init.d/10015_tbs_discovery | 2 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/10016_3dr_iris | 6 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/10017_steadidrone_qu4d | 35 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/11001_hexa_cox | 2 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/2100_mpx_easystar | 2 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/3031_phantom | 4 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/4008_ardrone | 25 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/4010_dji_f330 | 2 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/4011_dji_f450 | 2 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/4020_hk_micro_pcb | 28 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/rc.autostart | 10 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/rc.fw_apps | 2 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/rc.fw_defaults | 2 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/rc.logging | 4 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/rc.mc_apps | 1 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/rc.mc_defaults | 9 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/rc.usb | 14 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/init.d/rcS | 123 | ||||
-rw-r--r-- | ROMFS/px4fmu_common/mixers/README | 154 |
19 files changed, 338 insertions, 89 deletions
diff --git a/ROMFS/px4fmu_common/init.d/10015_tbs_discovery b/ROMFS/px4fmu_common/init.d/10015_tbs_discovery index fe85f7d35..c4be16943 100644 --- a/ROMFS/px4fmu_common/init.d/10015_tbs_discovery +++ b/ROMFS/px4fmu_common/init.d/10015_tbs_discovery @@ -20,7 +20,7 @@ then param set MC_PITCHRATE_D 0.0025 param set MC_YAW_P 2.8 param set MC_YAWRATE_P 0.28 - param set MC_YAWRATE_I 0.0 + param set MC_YAWRATE_I 0.1 param set MC_YAWRATE_D 0.0 fi diff --git a/ROMFS/px4fmu_common/init.d/10016_3dr_iris b/ROMFS/px4fmu_common/init.d/10016_3dr_iris index f11aa704e..084dff140 100644 --- a/ROMFS/px4fmu_common/init.d/10016_3dr_iris +++ b/ROMFS/px4fmu_common/init.d/10016_3dr_iris @@ -18,9 +18,9 @@ then param set MC_PITCHRATE_P 0.13 param set MC_PITCHRATE_I 0.0 param set MC_PITCHRATE_D 0.004 - param set MC_YAW_P 0.5 - param set MC_YAWRATE_P 0.2 - param set MC_YAWRATE_I 0.0 + param set MC_YAW_P 2.5 + param set MC_YAWRATE_P 0.25 + param set MC_YAWRATE_I 0.25 param set MC_YAWRATE_D 0.0 param set BAT_V_SCALING 0.00989 diff --git a/ROMFS/px4fmu_common/init.d/10017_steadidrone_qu4d b/ROMFS/px4fmu_common/init.d/10017_steadidrone_qu4d new file mode 100644 index 000000000..6179855f6 --- /dev/null +++ b/ROMFS/px4fmu_common/init.d/10017_steadidrone_qu4d @@ -0,0 +1,35 @@ +#!nsh +# +# Steadidrone QU4D +# +# Thomas Gubler <thomasgubler@gmail.com> +# Lorenz Meier <lm@inf.ethz.ch> +# + +sh /etc/init.d/rc.mc_defaults + +if [ $DO_AUTOCONFIG == yes ] +then + # TODO tune roll/pitch separately + param set MC_ROLL_P 7.0 + param set MC_ROLLRATE_P 0.13 + param set MC_ROLLRATE_I 0.0 + param set MC_ROLLRATE_D 0.004 + param set MC_PITCH_P 7.0 + param set MC_PITCHRATE_P 0.13 + param set MC_PITCHRATE_I 0.0 + param set MC_PITCHRATE_D 0.004 + param set MC_YAW_P 0.5 + param set MC_YAWRATE_P 0.2 + param set MC_YAWRATE_I 0.0 + param set MC_YAWRATE_D 0.0 + + param set BAT_N_CELLS 4 +fi + +set MIXER FMU_quad_w + +set PWM_MIN 1210 +set PWM_MAX 2100 + +set PWM_OUTPUTS 1234 diff --git a/ROMFS/px4fmu_common/init.d/11001_hexa_cox b/ROMFS/px4fmu_common/init.d/11001_hexa_cox index df2e609bc..daa04a4de 100644 --- a/ROMFS/px4fmu_common/init.d/11001_hexa_cox +++ b/ROMFS/px4fmu_common/init.d/11001_hexa_cox @@ -1,7 +1,5 @@ #!nsh # -# UNTESTED UNTESTED! -# # Generic 10" Hexa coaxial geometry # # Lorenz Meier <lm@inf.ethz.ch> diff --git a/ROMFS/px4fmu_common/init.d/2100_mpx_easystar b/ROMFS/px4fmu_common/init.d/2100_mpx_easystar index db0e40fc2..3ab2ac3d1 100644 --- a/ROMFS/px4fmu_common/init.d/2100_mpx_easystar +++ b/ROMFS/px4fmu_common/init.d/2100_mpx_easystar @@ -5,4 +5,4 @@ sh /etc/init.d/rc.fw_defaults -set MIXER easystar.mix +set MIXER easystar diff --git a/ROMFS/px4fmu_common/init.d/3031_phantom b/ROMFS/px4fmu_common/init.d/3031_phantom index 24372bddc..d05c3174f 100644 --- a/ROMFS/px4fmu_common/init.d/3031_phantom +++ b/ROMFS/px4fmu_common/init.d/3031_phantom @@ -37,3 +37,7 @@ then fi set MIXER FMU_Q + +# Provide ESC a constant 1000 us pulse +set PWM_OUTPUTS 4 +set PWM_DISARMED 1000 diff --git a/ROMFS/px4fmu_common/init.d/4008_ardrone b/ROMFS/px4fmu_common/init.d/4008_ardrone index 14786f210..e6007db0e 100644 --- a/ROMFS/px4fmu_common/init.d/4008_ardrone +++ b/ROMFS/px4fmu_common/init.d/4008_ardrone @@ -14,19 +14,20 @@ sh /etc/init.d/rc.mc_defaults if [ $DO_AUTOCONFIG == yes ] then # Set all params here, then disable autoconfig - param set MC_ROLL_P 5.0 - param set MC_ROLLRATE_P 0.13 - param set MC_ROLLRATE_I 0.0 - param set MC_ROLLRATE_D 0.0 - param set MC_PITCH_P 5.0 - param set MC_PITCHRATE_P 0.13 - param set MC_PITCHRATE_I 0.0 - param set MC_PITCHRATE_D 0.0 - param set MC_YAW_P 1.0 - param set MC_YAWRATE_P 0.15 - param set MC_YAWRATE_I 0.0 + param set MC_ROLL_P 6.0 + param set MC_ROLLRATE_P 0.14 + param set MC_ROLLRATE_I 0.1 + param set MC_ROLLRATE_D 0.002 + param set MC_PITCH_P 6.0 + param set MC_PITCHRATE_P 0.14 + param set MC_PITCHRATE_I 0.1 + param set MC_PITCHRATE_D 0.002 + param set MC_YAW_P 2.0 + param set MC_YAWRATE_P 0.2 + param set MC_YAWRATE_I 0.2 param set MC_YAWRATE_D 0.0 - param set MC_YAW_FF 0.15 + param set MC_YAW_FF 0.8 + param set BAT_V_SCALING 0.00838095238 fi diff --git a/ROMFS/px4fmu_common/init.d/4010_dji_f330 b/ROMFS/px4fmu_common/init.d/4010_dji_f330 index cd4480c3e..e6e2e19dc 100644 --- a/ROMFS/px4fmu_common/init.d/4010_dji_f330 +++ b/ROMFS/px4fmu_common/init.d/4010_dji_f330 @@ -19,7 +19,7 @@ then param set MC_PITCHRATE_D 0.003 param set MC_YAW_P 2.8 param set MC_YAWRATE_P 0.2 - param set MC_YAWRATE_I 0.0 + param set MC_YAWRATE_I 0.1 param set MC_YAWRATE_D 0.0 fi diff --git a/ROMFS/px4fmu_common/init.d/4011_dji_f450 b/ROMFS/px4fmu_common/init.d/4011_dji_f450 index ac2ecc70a..3465b59cf 100644 --- a/ROMFS/px4fmu_common/init.d/4011_dji_f450 +++ b/ROMFS/px4fmu_common/init.d/4011_dji_f450 @@ -20,7 +20,7 @@ then param set MC_PITCHRATE_D 0.003 param set MC_YAW_P 2.8 param set MC_YAWRATE_P 0.2 - param set MC_YAWRATE_I 0.0 + param set MC_YAWRATE_I 0.1 param set MC_YAWRATE_D 0.0 fi diff --git a/ROMFS/px4fmu_common/init.d/4020_hk_micro_pcb b/ROMFS/px4fmu_common/init.d/4020_hk_micro_pcb new file mode 100644 index 000000000..99ffd73a5 --- /dev/null +++ b/ROMFS/px4fmu_common/init.d/4020_hk_micro_pcb @@ -0,0 +1,28 @@ +#!nsh +# +# Hobbyking Micro Integrated PCB Quadcopter +# with SimonK ESC firmware and Mystery A1510 motors +# +# Thomas Gubler <thomasgubler@gmail.com> +# +echo "HK Micro PCB Quad" + +sh /etc/init.d/4001_quad_x + +if [ $DO_AUTOCONFIG == yes ] +then + param set MC_ROLL_P 7.0 + param set MC_ROLLRATE_P 0.1 + param set MC_ROLLRATE_I 0.0 + param set MC_ROLLRATE_D 0.003 + param set MC_PITCH_P 7.0 + param set MC_PITCHRATE_P 0.1 + param set MC_PITCHRATE_I 0.0 + param set MC_PITCHRATE_D 0.003 + param set MC_YAW_P 2.8 + param set MC_YAWRATE_P 0.2 + param set MC_YAWRATE_I 0.0 + param set MC_YAWRATE_D 0.0 +fi + +set PWM_MIN 1200 diff --git a/ROMFS/px4fmu_common/init.d/rc.autostart b/ROMFS/px4fmu_common/init.d/rc.autostart index 3d0de950d..17541e680 100644 --- a/ROMFS/px4fmu_common/init.d/rc.autostart +++ b/ROMFS/px4fmu_common/init.d/rc.autostart @@ -141,6 +141,11 @@ then sh /etc/init.d/4012_quad_x_can fi +if param compare SYS_AUTOSTART 4020 +then + sh /etc/init.d/4020_hk_micro_pcb +fi + # # Quad + # @@ -200,6 +205,11 @@ then sh /etc/init.d/10016_3dr_iris fi +if param compare SYS_AUTOSTART 10017 +then + sh /etc/init.d/10017_steadidrone_qu4d +fi + # # Hexa Coaxial # diff --git a/ROMFS/px4fmu_common/init.d/rc.fw_apps b/ROMFS/px4fmu_common/init.d/rc.fw_apps index 429abc5ec..9aca3fc5f 100644 --- a/ROMFS/px4fmu_common/init.d/rc.fw_apps +++ b/ROMFS/px4fmu_common/init.d/rc.fw_apps @@ -6,7 +6,7 @@ # # Start the attitude and position estimator # -fw_att_pos_estimator start +ekf_att_pos_estimator start # # Start attitude controller diff --git a/ROMFS/px4fmu_common/init.d/rc.fw_defaults b/ROMFS/px4fmu_common/init.d/rc.fw_defaults index 4cd73e23f..3a50fcf56 100644 --- a/ROMFS/px4fmu_common/init.d/rc.fw_defaults +++ b/ROMFS/px4fmu_common/init.d/rc.fw_defaults @@ -11,6 +11,4 @@ then param set NAV_RTL_ALT 100 param set NAV_RTL_LAND_T -1 param set NAV_ACCEPT_RAD 50 - param set RC_SCALE_ROLL 1 - param set RC_SCALE_PITCH 1 fi
\ No newline at end of file diff --git a/ROMFS/px4fmu_common/init.d/rc.logging b/ROMFS/px4fmu_common/init.d/rc.logging index 3469d5f5f..25f31a7e0 100644 --- a/ROMFS/px4fmu_common/init.d/rc.logging +++ b/ROMFS/px4fmu_common/init.d/rc.logging @@ -8,9 +8,9 @@ then if ver hwcmp PX4FMU_V1 then echo "Start sdlog2 at 50Hz" - sdlog2 start -r 50 -a -b 8 -t + sdlog2 start -r 50 -a -b 4 -t else echo "Start sdlog2 at 200Hz" - sdlog2 start -r 200 -a -b 16 -t + sdlog2 start -r 200 -a -b 22 -t fi fi diff --git a/ROMFS/px4fmu_common/init.d/rc.mc_apps b/ROMFS/px4fmu_common/init.d/rc.mc_apps index ed3939757..268eb9bba 100644 --- a/ROMFS/px4fmu_common/init.d/rc.mc_apps +++ b/ROMFS/px4fmu_common/init.d/rc.mc_apps @@ -5,6 +5,7 @@ # attitude_estimator_ekf start +#ekf_att_pos_estimator start position_estimator_inav start mc_att_control start diff --git a/ROMFS/px4fmu_common/init.d/rc.mc_defaults b/ROMFS/px4fmu_common/init.d/rc.mc_defaults index a8c6dc811..0df320f49 100644 --- a/ROMFS/px4fmu_common/init.d/rc.mc_defaults +++ b/ROMFS/px4fmu_common/init.d/rc.mc_defaults @@ -14,7 +14,7 @@ then param set MC_PITCHRATE_D 0.003 param set MC_YAW_P 2.8 param set MC_YAWRATE_P 0.2 - param set MC_YAWRATE_I 0.0 + param set MC_YAWRATE_I 0.1 param set MC_YAWRATE_D 0.0 param set MC_YAW_FF 0.5 @@ -35,6 +35,13 @@ then param set MPC_TILTMAX_AIR 45.0 param set MPC_TILTMAX_LND 15.0 param set MPC_LAND_SPEED 1.0 + + param set PE_VELNE_NOISE 0.5 + param set PE_VELD_NOISE 0.7 + param set PE_POSNE_NOISE 0.5 + param set PE_POSD_NOISE 1.0 + + param set NAV_ACCEPT_RAD 2.0 fi set PWM_RATE 400 diff --git a/ROMFS/px4fmu_common/init.d/rc.usb b/ROMFS/px4fmu_common/init.d/rc.usb index b7b556945..1f8d8b862 100644 --- a/ROMFS/px4fmu_common/init.d/rc.usb +++ b/ROMFS/px4fmu_common/init.d/rc.usb @@ -3,16 +3,22 @@ # USB MAVLink start # -echo "Starting MAVLink on this USB console" - -mavlink start -r 10000 -d /dev/ttyACM0 +mavlink start -r 10000 -d /dev/ttyACM0 -x # Enable a number of interesting streams we want via USB mavlink stream -d /dev/ttyACM0 -s NAMED_VALUE_FLOAT -r 10 +usleep 100000 mavlink stream -d /dev/ttyACM0 -s OPTICAL_FLOW -r 10 +usleep 100000 mavlink stream -d /dev/ttyACM0 -s VFR_HUD -r 20 +usleep 100000 mavlink stream -d /dev/ttyACM0 -s ATTITUDE -r 20 +usleep 100000 mavlink stream -d /dev/ttyACM0 -s ATTITUDE_CONTROLS -r 30 -mavlink stream -d /dev/ttyACM0 -s SERVO_OUTPUT_RAW_0 -r 10 +usleep 100000 +mavlink stream -d /dev/ttyACM0 -s SERVO_OUTPUT_RAW_0 -r 20 +usleep 100000 +mavlink stream -d /dev/ttyACM0 -s GLOBAL_POSITION_SETPOINT_INT -r 20 +usleep 100000 # Exit shell to make it available to MAVLink exit diff --git a/ROMFS/px4fmu_common/init.d/rcS b/ROMFS/px4fmu_common/init.d/rcS index 5d76e4283..c95016ace 100644 --- a/ROMFS/px4fmu_common/init.d/rcS +++ b/ROMFS/px4fmu_common/init.d/rcS @@ -65,12 +65,12 @@ then # Start CDC/ACM serial driver # sercon - + # # Start the ORB (first app to start) # uorb start - + # # Load parameters # @@ -79,7 +79,7 @@ then then set PARAM_FILE /fs/mtd_params fi - + param select $PARAM_FILE if param load then @@ -87,21 +87,25 @@ then else echo "[init] ERROR: Params loading failed: $PARAM_FILE" fi - + # # Start system state indicator # if rgbled start then - echo "[init] Using external RGB Led" + echo "[init] RGB Led" else if blinkm start then - echo "[init] Using blinkm" + echo "[init] BlinkM" blinkm systemstate fi fi - + + if pca8574 start + then + fi + # # Set default values # @@ -122,17 +126,21 @@ then set LOAD_DEFAULT_APPS yes set GPS yes set GPS_FAKE no - + # # Set DO_AUTOCONFIG flag to use it in AUTOSTART scripts # if param compare SYS_AUTOCONFIG 1 then + # We can't be sure the defaults haven't changed, so + # if someone requests a re-configuration, we do it + # cleanly from scratch (except autostart / autoconfig) + param reset_nostart set DO_AUTOCONFIG yes else set DO_AUTOCONFIG no fi - + # # Set USE_IO flag # @@ -142,7 +150,7 @@ then else set USE_IO no fi - + # # Set parameters and env variables for selected AUTOSTART # @@ -172,9 +180,9 @@ then param set SYS_AUTOCONFIG 0 param save fi - + set IO_PRESENT no - + if [ $USE_IO == yes ] then # @@ -186,19 +194,19 @@ then else set IO_FILE /etc/extras/px4io-v1_default.bin fi - + if px4io checkcrc $IO_FILE then echo "[init] PX4IO CRC OK" echo "PX4IO CRC OK" >> $LOG_FILE - + set IO_PRESENT yes else echo "[init] Trying to update" echo "PX4IO Trying to update" >> $LOG_FILE - + tone_alarm MLL32CP8MB - + if px4io forceupdate 14662 $IO_FILE then usleep 500000 @@ -207,7 +215,7 @@ then echo "[init] PX4IO CRC OK, update successful" echo "PX4IO CRC OK after updating" >> $LOG_FILE tone_alarm MLL8CDE - + set IO_PRESENT yes else echo "[init] ERROR: PX4IO update failed" @@ -220,14 +228,14 @@ then tone_alarm $TUNE_OUT_ERROR fi fi - + if [ $IO_PRESENT == no ] then echo "[init] ERROR: PX4IO not found" tone_alarm $TUNE_OUT_ERROR fi fi - + # # Set default output if not set # @@ -246,7 +254,7 @@ then # Need IO for output but it not present, disable output set OUTPUT_MODE none echo "[init] ERROR: PX4IO not found, disabling output" - + # Avoid using ttyS0 for MAVLink on FMUv1 if ver hwcmp PX4FMU_V1 then @@ -270,17 +278,17 @@ then # Try to get an USB console nshterm /dev/ttyACM0 & - + # # Start the Commander (needs to be this early for in-air-restarts) # commander start - + # # Start primary output # set TTYS1_BUSY no - + # If OUTPUT_MODE == none then something is wrong with setup and we shouldn't try to enable output if [ $OUTPUT_MODE != none ] then @@ -306,7 +314,7 @@ then tone_alarm $TUNE_OUT_ERROR fi fi - + if [ $OUTPUT_MODE == fmu -o $OUTPUT_MODE == ardrone ] then echo "[init] Use FMU as primary output" @@ -317,7 +325,7 @@ then echo "[init] ERROR: FMU mode_$FMU_MODE start failed" tone_alarm $TUNE_OUT_ERROR fi - + if ver hwcmp PX4FMU_V1 then if [ $FMU_MODE == pwm -o $FMU_MODE == gpio ] @@ -330,7 +338,7 @@ then fi fi fi - + if [ $OUTPUT_MODE == mkblctrl ] then echo "[init] Use MKBLCTRL as primary output" @@ -343,7 +351,7 @@ then then set MKBLCTRL_ARG "-mkmode +" fi - + if mkblctrl $MKBLCTRL_ARG then echo "[init] MKBLCTRL started" @@ -351,9 +359,9 @@ then echo "[init] ERROR: MKBLCTRL start failed" tone_alarm $TUNE_OUT_ERROR fi - + fi - + if [ $OUTPUT_MODE == hil ] then echo "[init] Use HIL as primary output" @@ -365,7 +373,7 @@ then tone_alarm $TUNE_OUT_ERROR fi fi - + # # Start IO or FMU for RC PPM input if needed # @@ -392,7 +400,7 @@ then echo "[init] ERROR: FMU mode_$FMU_MODE start failed" tone_alarm $TUNE_OUT_ERROR fi - + if ver hwcmp PX4FMU_V1 then if [ $FMU_MODE == pwm -o $FMU_MODE == gpio ] @@ -407,7 +415,7 @@ then fi fi fi - + # # MAVLink # @@ -428,28 +436,17 @@ then fi mavlink start $MAVLINK_FLAGS - - # - # Start the datamanager - # - dataman start - - # - # Start the navigator - # - navigator start - + # # Sensors, Logging, GPS # sh /etc/init.d/rc.sensors - if [ $HIL == no ] - then - echo "[init] Start logging" - sh /etc/init.d/rc.logging - fi - + # + # Start logging in all modes, including HIL + # + sh /etc/init.d/rc.logging + if [ $GPS == yes ] then echo "[init] Start GPS" @@ -459,7 +456,7 @@ then gps start -f else gps start - fi + fi fi # @@ -476,24 +473,24 @@ then if [ $VEHICLE_TYPE == fw ] then echo "[init] Vehicle type: FIXED WING" - + if [ $MIXER == none ] then # Set default mixer for fixed wing if not defined set MIXER FMU_AERT fi - + if [ $MAV_TYPE == none ] then # Use MAV_TYPE = 1 (fixed wing) if not defined set MAV_TYPE 1 fi - + param set MAV_TYPE $MAV_TYPE - + # Load mixer and configure outputs sh /etc/init.d/rc.interface - + # Start standard fixedwing apps if [ $LOAD_DEFAULT_APPS == yes ] then @@ -541,7 +538,7 @@ then set MAV_TYPE 14 fi fi - + # Still no MAV_TYPE found if [ $MAV_TYPE == none ] then @@ -549,10 +546,10 @@ then else param set MAV_TYPE $MAV_TYPE fi - + # Load mixer and configure outputs sh /etc/init.d/rc.interface - + # Start standard multicopter apps if [ $LOAD_DEFAULT_APPS == yes ] then @@ -561,6 +558,16 @@ then fi # + # Start the datamanager + # + dataman start + + # + # Start the navigator + # + navigator start + + # # Generic setup (autostart ID not found) # if [ $VEHICLE_TYPE == none ] diff --git a/ROMFS/px4fmu_common/mixers/README b/ROMFS/px4fmu_common/mixers/README new file mode 100644 index 000000000..60311232e --- /dev/null +++ b/ROMFS/px4fmu_common/mixers/README @@ -0,0 +1,154 @@ +PX4 mixer definitions +===================== + +Files in this directory implement example mixers that can be used as a basis +for customisation, or for general testing purposes. + +Mixer basics +------------ + +Mixers combine control values from various sources (control tasks, user inputs, +etc.) and produce output values suitable for controlling actuators; servos, +motors, switches and so on. + +An actuator derives its value from the combination of one or more control +values. Each of the control values is scaled according to the actuator's +configuration and then combined to produce the actuator value, which may then be +further scaled to suit the specific output type. + +Internally, all scaling is performed using floating point values. Inputs and +outputs are clamped to the range -1.0 to 1.0. + +control control control + | | | + v v v + scale scale scale + | | | + | v | + +-------> mix <------+ + | + scale + | + v + out + +Scaling +------- + +Basic scalers provide linear scaling of the input to the output. + +Each scaler allows the input value to be scaled independently for inputs +greater/less than zero. An offset can be applied to the output, and lower and +upper boundary constraints can be applied. Negative scaling factors cause the +output to be inverted (negative input produces positive output). + +Scaler pseudocode: + +if (input < 0) + output = (input * NEGATIVE_SCALE) + OFFSET +else + output = (input * POSITIVE_SCALE) + OFFSET + +if (output < LOWER_LIMIT) + output = LOWER_LIMIT +if (output > UPPER_LIMIT) + output = UPPER_LIMIT + +Syntax +------ + +Mixer definitions are text files; lines beginning with a single capital letter +followed by a colon are significant. All other lines are ignored, meaning that +explanatory text can be freely mixed with the definitions. + +Each file may define more than one mixer; the allocation of mixers to actuators +is specific to the device reading the mixer definition, and the number of +actuator outputs generated by a mixer is specific to the mixer. + +A mixer begins with a line of the form + + <tag>: <mixer arguments> + +The tag selects the mixer type; 'M' for a simple summing mixer, 'R' for a +multirotor mixer, etc. + +Null Mixer +.......... + +A null mixer consumes no controls and generates a single actuator output whose +value is always zero. Typically a null mixer is used as a placeholder in a +collection of mixers in order to achieve a specific pattern of actuator outputs. + +The null mixer definition has the form: + + Z: + +Simple Mixer +............ + +A simple mixer combines zero or more control inputs into a single actuator +output. Inputs are scaled, and the mixing function sums the result before +applying an output scaler. + +A simple mixer definition begins with: + + M: <control count> + O: <-ve scale> <+ve scale> <offset> <lower limit> <upper limit> + +If <control count> is zero, the sum is effectively zero and the mixer will +output a fixed value that is <offset> constrained by <lower limit> and <upper +limit>. + +The second line defines the output scaler with scaler parameters as discussed +above. Whilst the calculations are performed as floating-point operations, the +values stored in the definition file are scaled by a factor of 10000; i.e. an +offset of -0.5 is encoded as -5000. + +The definition continues with <control count> entries describing the control +inputs and their scaling, in the form: + + S: <group> <index> <-ve scale> <+ve scale> <offset> <lower limit> <upper limit> + +The <group> value identifies the control group from which the scaler will read, +and the <index> value an offset within that group. These values are specific to +the device reading the mixer definition. + +When used to mix vehicle controls, mixer group zero is the vehicle attitude +control group, and index values zero through three are normally roll, pitch, +yaw and thrust respectively. + +The remaining fields on the line configure the control scaler with parameters as +discussed above. Whilst the calculations are performed as floating-point +operations, the values stored in the definition file are scaled by a factor of +10000; i.e. an offset of -0.5 is encoded as -5000. + +Multirotor Mixer +................ + +The multirotor mixer combines four control inputs (roll, pitch, yaw, thrust) +into a set of actuator outputs intended to drive motor speed controllers. + +The mixer definition is a single line of the form: + +R: <geometry> <roll scale> <pitch scale> <yaw scale> <deadband> + +The supported geometries include: + + 4x - quadrotor in X configuration + 4+ - quadrotor in + configuration + 6x - hexcopter in X configuration + 6+ - hexcopter in + configuration + 8x - octocopter in X configuration + 8+ - octocopter in + configuration + +Each of the roll, pitch and yaw scale values determine scaling of the roll, +pitch and yaw controls relative to the thrust control. Whilst the calculations +are performed as floating-point operations, the values stored in the definition +file are scaled by a factor of 10000; i.e. an factor of 0.5 is encoded as 5000. + +Roll, pitch and yaw inputs are expected to range from -1.0 to 1.0, whilst the +thrust input ranges from 0.0 to 1.0. Output for each actuator is in the +range -1.0 to 1.0. + +In the case where an actuator saturates, all actuator values are rescaled so that +the saturating actuator is limited to 1.0.
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