iSentek IST8310 magnetometer rewrite

- simple state machine to reset, configure, etc
 - checked register mechanism (sensor will reset itself on configuration error)
 - configured in 16 bit mode (1320 LSB/Gauss instead of 330 LSB/Gauss)
 - adjusted orientation handling in driver to match datasheet as closely as possible
     - in many external compass units the rotation was wrong and very difficult to actual determine how to set correctly

boards/cuav/nora/init/rc.board_sensors

@@ -16,3 +16,6 @@ ms5611 -s -b 4 start
 # SPI6 (internal)
 icm20649 -s -b 6 -R 2 start
 ms5611 -s -b 6 start
+
+# External compass on GPS1/I2C1: standard CUAV GPS/compass puck (with lights, safety button, and buzzer)
+ist8310 -X -b 1 -R 10 start

boards/cuav/x7pro/init/rc.board_sensors

@@ -17,3 +17,6 @@ ms5611 -s -b 4 start
 # SPI6 (internal)
 icm20649 -s -b 6 -R 2 start
 ms5611 -s -b 6 start
+
+# External compass on GPS1/I2C1: standard CUAV GPS/compass puck (with lights, safety button, and buzzer)
+ist8310 -X -b 1 -R 10 start

boards/holybro/durandal-v1/init/rc.board_sensors

@@ -12,7 +12,10 @@ bmi088 -A -R 2 -s start
 bmi088 -G -R 2 -s start
 
 # internal compass
-ist8310 -I start
+ist8310 -I -R 10 start
 
 # Baro on internal SPI
 ms5611 -s start
+
+# External compass on GPS1/I2C1: standard Holybro GPS/compass puck (with lights, safety button, and buzzer)
+ist8310 -X -b 1 -R 10 start

boards/holybro/durandal-v1/stackcheck.cmake

@@ -39,7 +39,7 @@ px4_add_board(
 		#lights/rgbled
 		lights/rgbled_ncp5623c
 		#magnetometer # all available magnetometer drivers
-		magnetometer/ist8310
+		magnetometer/isentek/ist8310
 		#mkblctrl
 		#optical_flow # all available optical flow drivers
 		#osd

boards/holybro/pix32v5/init/rc.board_sensors

@@ -16,7 +16,10 @@ bmi055 -A -R 2 -s start
 bmi055 -G -R 2 -s start
 
 # internal compass
-ist8310 -I start
+ist8310 -I -R 10 start
 
 # Baro on internal SPI
 ms5611 -s start
+
+# External compass on GPS1/I2C1 (the 3rd external bus): standard Holybro GPS/compass puck (with lights, safety button, and buzzer)
+ist8310 -X -b 3 -R 10 start

boards/intel/aerofc-v1/default.cmake

@@ -21,7 +21,7 @@ px4_add_board(
 		#irlock
 		#magnetometer # all available magnetometer drivers
 		magnetometer/hmc5883
-		magnetometer/ist8310
+		magnetometer/isentek/ist8310
 		#optical_flow/px4flow
 		#protocol_splitter
 		pwm_out_sim

boards/intel/aerofc-v1/init/rc.board_sensors

@@ -12,7 +12,7 @@ fi
 
 mpu9250 -s -R 0 start
 
-ist8310 -I -R 4 start
+ist8310 -I -R 14 start
 
 ll40ls start -X
 

boards/intel/aerofc-v1/rtps.cmake

@@ -21,7 +21,7 @@ px4_add_board(
 		#irlock
 		#magnetometer # all available magnetometer drivers
 		magnetometer/hmc5883
-		magnetometer/ist8310
+		magnetometer/isentek/ist8310
 		#optical_flow/px4flow
 		protocol_splitter
 		pwm_out_sim

boards/nxp/fmurt1062-v1/init/rc.board_sensors

@@ -28,7 +28,7 @@ bmi055 -A -R 2 -s start
 bmi055 -G -R 2 -s start
 
 # internal compass
-ist8310 -I start
+ist8310 -I -R 10 start
 
 # Baro on internal SPI
 ms5611 -s start

boards/px4/fmu-v5/init/rc.board_sensors

@@ -15,8 +15,11 @@ icm20689 -s -R 2 start
 bmi055 -A -R 2 -s start
 bmi055 -G -R 2 -s start
 
-# internal compass
-ist8310 -I start
-
 # Baro on internal SPI
 ms5611 -s start
+
+# internal compass
+ist8310 -I -R 10 start
+
+# External compass on GPS1/I2C1 (the 3rd external bus): standard Holybro Pixhawk 4 or CUAV V5 GPS/compass puck (with lights, safety button, and buzzer)
+ist8310 -X -b 3 -R 10 start

boards/px4/fmu-v5/optimized.cmake

@@ -40,7 +40,7 @@ px4_add_board(
 		lights/rgbled_ncp5623c
 		#lights/rgbled_pwm
 		#magnetometer # all available magnetometer drivers
-		magnetometer/ist8310
+		magnetometer/isentek/ist8310
 		optical_flow # all available optical flow drivers
 		#pwm_input
 		pwm_out_sim

boards/uvify/core/default.cmake

@@ -29,7 +29,7 @@ px4_add_board(
 		lights/rgbled_ncp5623c
 		magnetometer/bmm150
 		magnetometer/lis3mdl
-		magnetometer/ist8310
+		magnetometer/isentek/ist8310
 		optical_flow # all available optical flow drivers
 		pca9685
 		pwm_input