Support for Raspberry PI RP2040 MCU (#18083)

boards/raspberrypi/pico/init/rc.board_defaults

@@ -0,0 +1,18 @@
+#!/bin/sh
+#
+# board specific defaults
+#------------------------------------------------------------------------------
+
+# system_power unavailable
+param set-default CBRK_SUPPLY_CHK 894281
+
+# Disable safety switch by default
+param set-default CBRK_IO_SAFETY 22027
+
+# use the Q attitude estimator, it works w/o mag or GPS.
+# param set-default SYS_MC_EST_GROUP 3
+# param set-default ATT_ACC_COMP 0
+# param set-default ATT_W_ACC 0.4000
+# param set-default ATT_W_GYRO_BIAS 0.0000
+
+# param set-default SYS_HAS_MAG 0

boards/raspberrypi/pico/init/rc.board_mavlink

@@ -0,0 +1,7 @@
+#!/bin/sh
+#
+# board specific MAVLink startup script.
+#------------------------------------------------------------------------------
+
+# Start MAVLink on the USB port
+mavlink start -d /dev/ttyACM0

boards/raspberrypi/pico/init/rc.board_sensors

@@ -0,0 +1,12 @@
+#!/bin/sh
+#
+# board specific sensors init
+#------------------------------------------------------------------------------
+
+board_adc start
+
+# try starting an mpu9250 IMU on external SPI
+mpu9250 start -S
+
+# try starting a bmp280 barometer on external SPI
+bmp280 start -S