Added support for a total of four control groups to the IO driver and IO firmware. This allows to run auxiliary payload. Cleaned up defines for RC input channel counts, this needs another sweep to then finally allow up to 16 mapped channels and up to 20-24 RAW RC channels

7 files changed, 166 insertions, 71 deletions

diff --git a/src/drivers/px4io/px4io.cpp b/src/drivers/px4io/px4io.cpp
index ef6ca04e9..702ec1c3a 100644
--- a/src/drivers/px4io/px4io.cpp
+++ b/src/drivers/px4io/px4io.cpp
@@ -226,30 +226,33 @@ private:
 	device::Device		*_interface;
 
 	// XXX
-	unsigned		_hardware;			///< Hardware revision
-	unsigned		_max_actuators;		///<Maximum # of actuators supported by PX4IO
-	unsigned		_max_controls;		///<Maximum # of controls supported by PX4IO
-	unsigned		_max_rc_input;		///<Maximum receiver channels supported by PX4IO
-	unsigned		_max_relays;		///<Maximum relays supported by PX4IO
-	unsigned		_max_transfer;		///<Maximum number of I2C transfers supported by PX4IO
+	unsigned		_hardware;		///< Hardware revision
+	unsigned		_max_actuators;		///< Maximum # of actuators supported by PX4IO
+	unsigned		_max_controls;		///< Maximum # of controls supported by PX4IO
+	unsigned		_max_rc_input;		///< Maximum receiver channels supported by PX4IO
+	unsigned		_max_relays;		///< Maximum relays supported by PX4IO
+	unsigned		_max_transfer;		///< Maximum number of I2C transfers supported by PX4IO
 
 	unsigned 		_update_interval;	///< Subscription interval limiting send rate
 	bool			_rc_handling_disabled;	///< If set, IO does not evaluate, but only forward the RC values
 
-	volatile int		_task;			///<worker task id
-	volatile bool		_task_should_exit;	///<worker terminate flag
+	volatile int		_task;			///< worker task id
+	volatile bool		_task_should_exit;	///< worker terminate flag
 
-	int			_mavlink_fd;		///<mavlink file descriptor. This is opened by class instantiation and Doesn't appear to be usable in main thread.
-	int			_thread_mavlink_fd;	///<mavlink file descriptor for thread.
+	int			_mavlink_fd;		///< mavlink file descriptor. This is opened by class instantiation and Doesn't appear to be usable in main thread.
+	int			_thread_mavlink_fd;	///< mavlink file descriptor for thread.
 
-	perf_counter_t		_perf_update;		///<local performance counter
+	perf_counter_t		_perf_update;		///< local performance counter
 
 	/* cached IO state */
-	uint16_t		_status;		///<Various IO status flags
-	uint16_t		_alarms;		///<Various IO alarms
+	uint16_t		_status;		///< Various IO status flags
+	uint16_t		_alarms;		///< Various IO alarms
 
 	/* subscribed topics */
-	int			_t_actuators;		///< actuator controls topic
+	int			_t_actuator_controls_0;	///< actuator controls group 0 topic
+	int			_t_actuator_controls_1;	///< actuator controls group 1 topic
+	int			_t_actuator_controls_2;	///< actuator controls group 2 topic
+	int			_t_actuator_controls_3;	///< actuator controls group 3 topic
 	int			_t_actuator_armed;	///< system armed control topic
 	int 			_t_vehicle_control_mode;///< vehicle control mode topic
 	int			_t_param;		///< parameter update topic
@@ -263,18 +266,18 @@ private:
 	orb_advert_t		_to_servorail;		///< servorail status
 	orb_advert_t		_to_safety;		///< status of safety
 
-	actuator_outputs_s	_outputs;		///<mixed outputs
-	actuator_controls_effective_s _controls_effective; ///<effective controls
+	actuator_outputs_s	_outputs;		///< mixed outputs
+	actuator_controls_effective_s _controls_effective; ///< effective controls
 
-	bool			_primary_pwm_device;	///<true if we are the default PWM output
+	bool			_primary_pwm_device;	///< true if we are the default PWM output
 
-	float			_battery_amp_per_volt;	///<current sensor amps/volt
-	float			_battery_amp_bias;	///<current sensor bias
-	float			_battery_mamphour_total;///<amp hours consumed so far
-	uint64_t		_battery_last_timestamp;///<last amp hour calculation timestamp
+	float			_battery_amp_per_volt;	///< current sensor amps/volt
+	float			_battery_amp_bias;	///< current sensor bias
+	float			_battery_mamphour_total;///< amp hours consumed so far
+	uint64_t		_battery_last_timestamp;///< last amp hour calculation timestamp
 
 #ifdef CONFIG_ARCH_BOARD_PX4FMU_V1
-	bool			_dsm_vcc_ctl;		///<true if relay 1 controls DSM satellite RX power
+	bool			_dsm_vcc_ctl;		///< true if relay 1 controls DSM satellite RX power
 #endif
 
 	/**
@@ -288,9 +291,14 @@ private:
 	void			task_main();
 
 	/**
-	 * Send controls to IO
+	 * Send controls for one group to IO
 	 */
-	int			io_set_control_state();
+	int			io_set_control_state(unsigned group);
+
+	/**
+	 * Send all controls to IO
+	 */
+	int			io_set_control_groups();
 
 	/**
 	 * Update IO's arming-related state
@@ -466,7 +474,10 @@ PX4IO::PX4IO(device::Device *interface) :
 	_perf_update(perf_alloc(PC_ELAPSED, "px4io update")),
 	_status(0),
 	_alarms(0),
-	_t_actuators(-1),
+	_t_actuator_controls_0(-1),
+	_t_actuator_controls_1(-1),
+	_t_actuator_controls_2(-1),
+	_t_actuator_controls_3(-1),
 	_t_actuator_armed(-1),
 	_t_vehicle_control_mode(-1),
 	_t_param(-1),
@@ -769,15 +780,20 @@ PX4IO::task_main()
 	 * Subscribe to the appropriate PWM output topic based on whether we are the
 	 * primary PWM output or not.
 	 */
-	_t_actuators = orb_subscribe(_primary_pwm_device ? ORB_ID_VEHICLE_ATTITUDE_CONTROLS :
-				     ORB_ID(actuator_controls_1));
-	orb_set_interval(_t_actuators, 20);		/* default to 50Hz */
+	_t_actuator_controls_0 = orb_subscribe(ORB_ID(actuator_controls_0));
+	orb_set_interval(_t_actuator_controls_0, 20);		/* default to 50Hz */
+	_t_actuator_controls_1 = orb_subscribe(ORB_ID(actuator_controls_1));
+	orb_set_interval(_t_actuator_controls_1, 33);		/* default to 30Hz */
+	_t_actuator_controls_2 = orb_subscribe(ORB_ID(actuator_controls_2));
+	orb_set_interval(_t_actuator_controls_2, 33);		/* default to 30Hz */
+	_t_actuator_controls_3 = orb_subscribe(ORB_ID(actuator_controls_3));
+	orb_set_interval(_t_actuator_controls_3, 33);		/* default to 30Hz */
 	_t_actuator_armed = orb_subscribe(ORB_ID(actuator_armed));
 	_t_vehicle_control_mode = orb_subscribe(ORB_ID(vehicle_control_mode));
 	_t_param = orb_subscribe(ORB_ID(parameter_update));
 	_t_vehicle_command = orb_subscribe(ORB_ID(vehicle_command));
 
-	if ((_t_actuators < 0) ||
+	if ((_t_actuator_controls_0 < 0) ||
 	    (_t_actuator_armed < 0) ||
 	    (_t_vehicle_control_mode < 0) ||
 	    (_t_param < 0) ||
@@ -788,7 +804,7 @@ PX4IO::task_main()
 
 	/* poll descriptor */
 	pollfd fds[1];
-	fds[0].fd = _t_actuators;
+	fds[0].fd = _t_actuator_controls_0;
 	fds[0].events = POLLIN;
 
 	log("ready");
@@ -807,7 +823,11 @@ PX4IO::task_main()
 			if (_update_interval > 100)
 				_update_interval = 100;
 
-			orb_set_interval(_t_actuators, _update_interval);
+			orb_set_interval(_t_actuator_controls_0, _update_interval);
+			/*
+			 * NOT changing the rate of groups 1-3 here, because only attitude
+			 * really needs to run fast.
+			 */
 			_update_interval = 0;
 		}
 
@@ -827,7 +847,10 @@ PX4IO::task_main()
 
 		/* if we have new control data from the ORB, handle it */
 		if (fds[0].revents & POLLIN) {
-			io_set_control_state();
+
+			/* we're not nice to the lower-priority control groups and only check them
+			   when the primary group updated (which is now). */
+			io_set_control_groups();
 		}
 
 		if (now >= poll_last + IO_POLL_INTERVAL) {
@@ -871,7 +894,7 @@ PX4IO::task_main()
 				orb_copy(ORB_ID(vehicle_command), _t_vehicle_command, &cmd);
 
 				// Check for a DSM pairing command
-				if ((cmd.command == VEHICLE_CMD_START_RX_PAIR) && (cmd.param1 == 0.0f)) {
+				if (((int)cmd.command == VEHICLE_CMD_START_RX_PAIR) && ((int)cmd.param1 == 0)) {
 					dsm_bind_ioctl((int)cmd.param2);
 				}
 			}
@@ -922,20 +945,74 @@ out:
 }
 
 int
-PX4IO::io_set_control_state()
+PX4IO::io_set_control_groups()
+{
+	bool attitude_ok = io_set_control_state(0);
+
+	/* send auxiliary control groups */
+	(void)io_set_control_state(0);
+	(void)io_set_control_state(1);
+	(void)io_set_control_state(2);
+
+	return attitude_ok;
+}
+
+int
+PX4IO::io_set_control_state(unsigned group)
 {
 	actuator_controls_s	controls;	///< actuator outputs
 	uint16_t 		regs[_max_actuators];
 
 	/* get controls */
-	orb_copy(_primary_pwm_device ? ORB_ID_VEHICLE_ATTITUDE_CONTROLS :
-		 ORB_ID(actuator_controls_1), _t_actuators, &controls);
+	bool changed;
+
+	switch (group) {
+		case 0:
+		{
+			orb_check(_t_actuator_controls_0, &changed);
+
+			if (changed) {
+				orb_copy(ORB_ID(actuator_controls_0), _t_actuator_controls_0, &controls);
+			}
+		}
+		break;
+		case 1:
+		{
+			orb_check(_t_actuator_controls_1, &changed);
+
+			if (changed) {
+				orb_copy(ORB_ID(actuator_controls_1), _t_actuator_controls_1, &controls);
+			}
+		}
+		break;
+		case 2:
+		{
+			orb_check(_t_actuator_controls_2, &changed);
+
+			if (changed) {
+				orb_copy(ORB_ID(actuator_controls_2), _t_actuator_controls_2, &controls);
+			}
+		}
+		break;
+		case 3:
+		{
+			orb_check(_t_actuator_controls_3, &changed);
+
+			if (changed) {
+				orb_copy(ORB_ID(actuator_controls_3), _t_actuator_controls_3, &controls);
+			}
+		}
+		break;
+	}
+
+	if (!changed)
+		return -1;
 
 	for (unsigned i = 0; i < _max_controls; i++)
 		regs[i] = FLOAT_TO_REG(controls.control[i]);
 
 	/* copy values to registers in IO */
-	return io_reg_set(PX4IO_PAGE_CONTROLS, 0, regs, _max_controls);
+	return io_reg_set(PX4IO_PAGE_CONTROLS, group * PX4IO_PROTOCOL_MAX_CONTROL_COUNT, regs, _max_controls);
 }
 
 
diff --git a/src/modules/px4iofirmware/dsm.c b/src/modules/px4iofirmware/dsm.c
index fd3b72015..4d306d6d0 100644
--- a/src/modules/px4iofirmware/dsm.c
+++ b/src/modules/px4iofirmware/dsm.c
@@ -355,7 +355,7 @@ dsm_decode(hrt_abstime frame_time, uint16_t *values, uint16_t *num_values)
 			continue;
 
 		/* ignore channels out of range */
-		if (channel >= PX4IO_INPUT_CHANNELS)
+		if (channel >= PX4IO_RC_INPUT_CHANNELS)
 			continue;
 
 		/* update the decoded channel count */
diff --git a/src/modules/px4iofirmware/mixer.cpp b/src/modules/px4iofirmware/mixer.cpp
index 05897b4ce..9bb93ce9f 100644
--- a/src/modules/px4iofirmware/mixer.cpp
+++ b/src/modules/px4iofirmware/mixer.cpp
@@ -236,13 +236,13 @@ mixer_callback(uintptr_t handle,
 	       uint8_t control_index,
 	       float &control)
 {
-	if (control_group != 0)
+	if (control_group > 3)
 		return -1;
 
 	switch (source) {
 	case MIX_FMU:
 		if (control_index < PX4IO_CONTROL_CHANNELS) {
-			control = REG_TO_FLOAT(r_page_controls[control_index]);
+			control = REG_TO_FLOAT(r_page_controls[CONTROL_PAGE_INDEX(control_group, control_index)]);
 			break;
 		}
 		return -1;
diff --git a/src/modules/px4iofirmware/protocol.h b/src/modules/px4iofirmware/protocol.h
index 5e5396782..832369f00 100644
--- a/src/modules/px4iofirmware/protocol.h
+++ b/src/modules/px4iofirmware/protocol.h
@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
+ *   Copyright (c) 2012, 2013 PX4 Development Team. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -63,7 +63,7 @@
  * readable pages to be densely packed. Page numbers do not need to be
  * packed.
  *
- * Definitions marked 1 are only valid on PX4IOv1 boards. Likewise, 
+ * Definitions marked [1] are only valid on PX4IOv1 boards. Likewise, 
  * [2] denotes definitions specific to the PX4IOv2 board.
  */
 
@@ -76,6 +76,9 @@
 
 #define PX4IO_PROTOCOL_VERSION		4
 
+/* maximum allowable sizes on this protocol version */
+#define PX4IO_PROTOCOL_MAX_CONTROL_COUNT	8	/**< The protocol does not support more than set here, individual units might support less - see PX4IO_P_CONFIG_CONTROL_COUNT */
+
 /* static configuration page */
 #define PX4IO_PAGE_CONFIG		0
 #define PX4IO_P_CONFIG_PROTOCOL_VERSION		0	/* PX4IO_PROTOCOL_VERSION */
@@ -87,6 +90,7 @@
 #define PX4IO_P_CONFIG_RC_INPUT_COUNT		6	/* hardcoded max R/C input count supported */
 #define PX4IO_P_CONFIG_ADC_INPUT_COUNT		7	/* hardcoded max ADC inputs */
 #define PX4IO_P_CONFIG_RELAY_COUNT		8	/* hardcoded # of relay outputs */
+#define PX4IO_P_CONFIG_CONTROL_GROUP_COUNT	8	/**< hardcoded # of control groups*/
 
 /* dynamic status page */
 #define PX4IO_PAGE_STATUS		1
@@ -184,44 +188,54 @@ enum {							/* DSM bind states */
 	dsm_bind_reinit_uart
 };
  					     /*	8 */
-#define PX4IO_P_SETUP_SET_DEBUG			9	/* debug level for IO board */
+#define PX4IO_P_SETUP_SET_DEBUG			9		/* debug level for IO board */
 
 /* autopilot control values, -10000..10000 */
-#define PX4IO_PAGE_CONTROLS		51		/* 0..CONFIG_CONTROL_COUNT */
+#define PX4IO_PAGE_CONTROLS			51		/**< actuator control groups, one after the other, 8 wide */
+#define PX4IO_P_CONTROLS_GROUP_0		(PX4IO_PROTOCOL_MAX_CONTROL_COUNT * 0)	/**< 0..PX4IO_PROTOCOL_MAX_CONTROL_COUNT - 1 */
+#define PX4IO_P_CONTROLS_GROUP_1		(PX4IO_PROTOCOL_MAX_CONTROL_COUNT * 1)	/**< 0..PX4IO_PROTOCOL_MAX_CONTROL_COUNT - 1 */
+#define PX4IO_P_CONTROLS_GROUP_2		(PX4IO_PROTOCOL_MAX_CONTROL_COUNT * 2)	/**< 0..PX4IO_PROTOCOL_MAX_CONTROL_COUNT - 1 */
+#define PX4IO_P_CONTROLS_GROUP_3		(PX4IO_PROTOCOL_MAX_CONTROL_COUNT * 3)	/**< 0..PX4IO_PROTOCOL_MAX_CONTROL_COUNT - 1 */
+
+#define PX4IO_P_CONTROLS_GROUP_VALID		64
+#define PX4IO_P_CONTROLS_GROUP_VALID_GROUP0	(1 << 0) /* group 0 is valid / received */
+#define PX4IO_P_CONTROLS_GROUP_VALID_GROUP1	(1 << 1) /* group 1 is valid / received */
+#define PX4IO_P_CONTROLS_GROUP_VALID_GROUP2	(1 << 2) /* group 2 is valid / received */
+#define PX4IO_P_CONTROLS_GROUP_VALID_GROUP3	(1 << 3) /* group 3 is valid / received */
 
 /* raw text load to the mixer parser - ignores offset */
-#define PX4IO_PAGE_MIXERLOAD		52
+#define PX4IO_PAGE_MIXERLOAD			52
 
 /* R/C channel config */
-#define PX4IO_PAGE_RC_CONFIG		53		/* R/C input configuration */
-#define PX4IO_P_RC_CONFIG_MIN			0	/* lowest input value */
-#define PX4IO_P_RC_CONFIG_CENTER		1	/* center input value */
-#define PX4IO_P_RC_CONFIG_MAX			2	/* highest input value */
-#define PX4IO_P_RC_CONFIG_DEADZONE		3	/* band around center that is ignored */
-#define PX4IO_P_RC_CONFIG_ASSIGNMENT		4	/* mapped input value */
-#define PX4IO_P_RC_CONFIG_OPTIONS		5	/* channel options bitmask */
+#define PX4IO_PAGE_RC_CONFIG			53		/**< R/C input configuration */
+#define PX4IO_P_RC_CONFIG_MIN			0		/**< lowest input value */
+#define PX4IO_P_RC_CONFIG_CENTER		1		/**< center input value */
+#define PX4IO_P_RC_CONFIG_MAX			2		/**< highest input value */
+#define PX4IO_P_RC_CONFIG_DEADZONE		3		/**< band around center that is ignored */
+#define PX4IO_P_RC_CONFIG_ASSIGNMENT		4		/**< mapped input value */
+#define PX4IO_P_RC_CONFIG_OPTIONS		5		/**< channel options bitmask */
 #define PX4IO_P_RC_CONFIG_OPTIONS_ENABLED	(1 << 0)
 #define PX4IO_P_RC_CONFIG_OPTIONS_REVERSE	(1 << 1)
-#define PX4IO_P_RC_CONFIG_STRIDE		6	/* spacing between channel config data */
+#define PX4IO_P_RC_CONFIG_STRIDE		6		/**< spacing between channel config data */
 
 /* PWM output - overrides mixer */
-#define PX4IO_PAGE_DIRECT_PWM		54		/* 0..CONFIG_ACTUATOR_COUNT-1 */
+#define PX4IO_PAGE_DIRECT_PWM			54		/**< 0..CONFIG_ACTUATOR_COUNT-1 */
 
 /* PWM failsafe values - zero disables the output */
-#define PX4IO_PAGE_FAILSAFE_PWM		55		/* 0..CONFIG_ACTUATOR_COUNT-1 */
+#define PX4IO_PAGE_FAILSAFE_PWM			55		/**< 0..CONFIG_ACTUATOR_COUNT-1 */
 
 /* Debug and test page - not used in normal operation */
-#define PX4IO_PAGE_TEST			127
-#define PX4IO_P_TEST_LED			0	/* set the amber LED on/off */
+#define PX4IO_PAGE_TEST				127
+#define PX4IO_P_TEST_LED			0		/**< set the amber LED on/off */
 
 /* PWM minimum values for certain ESCs */
-#define PX4IO_PAGE_CONTROL_MIN_PWM		106	/* 0..CONFIG_ACTUATOR_COUNT-1 */
+#define PX4IO_PAGE_CONTROL_MIN_PWM		106		/**< 0..CONFIG_ACTUATOR_COUNT-1 */
 
 /* PWM maximum values for certain ESCs */
-#define PX4IO_PAGE_CONTROL_MAX_PWM		107	/* 0..CONFIG_ACTUATOR_COUNT-1 */
+#define PX4IO_PAGE_CONTROL_MAX_PWM		107		/**< 0..CONFIG_ACTUATOR_COUNT-1 */
 
 /* PWM disarmed values that are active, even when SAFETY_SAFE */
-#define PX4IO_PAGE_DISARMED_PWM		108	/* 0..CONFIG_ACTUATOR_COUNT-1 */
+#define PX4IO_PAGE_DISARMED_PWM		108			/* 0..CONFIG_ACTUATOR_COUNT-1 */
 
 /**
  * As-needed mixer data upload.
diff --git a/src/modules/px4iofirmware/px4io.h b/src/modules/px4iofirmware/px4io.h
index 4fea0288c..61eacd602 100644
--- a/src/modules/px4iofirmware/px4io.h
+++ b/src/modules/px4iofirmware/px4io.h
@@ -53,7 +53,9 @@
  */
 #define PX4IO_SERVO_COUNT		8
 #define PX4IO_CONTROL_CHANNELS		8
-#define PX4IO_INPUT_CHANNELS		8 // XXX this should be 18 channels
+#define PX4IO_CONTROL_GROUPS		2
+#define PX4IO_RC_INPUT_CHANNELS		8 // XXX this should be 18 channels
+#define PX4IO_RC_MAPPED_CONTROL_CHANNELS		8 /**< This is the maximum number of channels mapped/used */
 
 /*
  * Debug logging
@@ -169,6 +171,8 @@ extern pwm_limit_t pwm_limit;
 
 #define BUTTON_SAFETY		stm32_gpioread(GPIO_BTN_SAFETY)
 
+#define CONTROL_PAGE_INDEX(_group, _channel) (_group * PX4IO_CONTROL_CHANNELS + _channel)
+
 /*
  * Mixer
  */
diff --git a/src/modules/px4iofirmware/registers.c b/src/modules/px4iofirmware/registers.c
index 86a40bc22..0533f1d76 100644
--- a/src/modules/px4iofirmware/registers.c
+++ b/src/modules/px4iofirmware/registers.c
@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
+ *   Copyright (c) 2012, 2013 PX4 Development Team. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -68,7 +68,7 @@ static const uint16_t	r_page_config[] = {
 	[PX4IO_P_CONFIG_MAX_TRANSFER]		= 64,	/* XXX hardcoded magic number */
 	[PX4IO_P_CONFIG_CONTROL_COUNT]		= PX4IO_CONTROL_CHANNELS,
 	[PX4IO_P_CONFIG_ACTUATOR_COUNT]		= PX4IO_SERVO_COUNT,
-	[PX4IO_P_CONFIG_RC_INPUT_COUNT]		= PX4IO_CONTROL_CHANNELS,
+	[PX4IO_P_CONFIG_RC_INPUT_COUNT]		= PX4IO_RC_INPUT_CHANNELS,
 	[PX4IO_P_CONFIG_ADC_INPUT_COUNT]	= PX4IO_ADC_CHANNEL_COUNT,
 	[PX4IO_P_CONFIG_RELAY_COUNT]		= PX4IO_RELAY_CHANNELS,
 };
@@ -112,7 +112,7 @@ uint16_t		r_page_servos[PX4IO_SERVO_COUNT];
 uint16_t		r_page_raw_rc_input[] =
 {
 	[PX4IO_P_RAW_RC_COUNT]			= 0,
-	[PX4IO_P_RAW_RC_BASE ... (PX4IO_P_RAW_RC_BASE + PX4IO_CONTROL_CHANNELS)] = 0
+	[PX4IO_P_RAW_RC_BASE ... (PX4IO_P_RAW_RC_BASE + PX4IO_RC_INPUT_CHANNELS)] = 0
 };
 
 /**
@@ -122,7 +122,7 @@ uint16_t		r_page_raw_rc_input[] =
  */
 uint16_t		r_page_rc_input[] = {
 	[PX4IO_P_RC_VALID]			= 0,
-	[PX4IO_P_RC_BASE ... (PX4IO_P_RC_BASE + PX4IO_CONTROL_CHANNELS)] = 0
+	[PX4IO_P_RC_BASE ... (PX4IO_P_RC_BASE + PX4IO_RC_MAPPED_CONTROL_CHANNELS)] = 0
 };
 
 /**
@@ -172,7 +172,7 @@ volatile uint16_t	r_page_setup[] =
  *
  * Control values from the FMU.
  */
-volatile uint16_t	r_page_controls[PX4IO_CONTROL_CHANNELS];
+volatile uint16_t	r_page_controls[PX4IO_CONTROL_GROUPS * PX4IO_CONTROL_CHANNELS];
 
 /*
  * PAGE 102 does not have a buffer.
@@ -183,7 +183,7 @@ volatile uint16_t	r_page_controls[PX4IO_CONTROL_CHANNELS];
  *
  * R/C channel input configuration.
  */
-uint16_t		r_page_rc_input_config[PX4IO_CONTROL_CHANNELS * PX4IO_P_RC_CONFIG_STRIDE];
+uint16_t		r_page_rc_input_config[PX4IO_RC_INPUT_CHANNELS * PX4IO_P_RC_CONFIG_STRIDE];
 
 /* valid options */
 #define PX4IO_P_RC_CONFIG_OPTIONS_VALID	(PX4IO_P_RC_CONFIG_OPTIONS_REVERSE | PX4IO_P_RC_CONFIG_OPTIONS_ENABLED)
@@ -235,7 +235,7 @@ registers_set(uint8_t page, uint8_t offset, const uint16_t *values, unsigned num
 	case PX4IO_PAGE_CONTROLS:
 
 		/* copy channel data */
-		while ((offset < PX4IO_CONTROL_CHANNELS) && (num_values > 0)) {
+		while ((offset < PX4IO_CONTROL_GROUPS * PX4IO_CONTROL_CHANNELS) && (num_values > 0)) {
 
 			/* XXX range-check value? */
 			r_page_controls[offset] = *values;
@@ -525,7 +525,7 @@ registers_set_one(uint8_t page, uint8_t offset, uint16_t value)
 		unsigned index = offset - channel * PX4IO_P_RC_CONFIG_STRIDE;
 		uint16_t *conf = &r_page_rc_input_config[channel * PX4IO_P_RC_CONFIG_STRIDE];
 
-		if (channel >= PX4IO_CONTROL_CHANNELS)
+		if (channel >= PX4IO_RC_INPUT_CHANNELS)
 			return -1;
 
 		/* disable the channel until we have a chance to sanity-check it */
@@ -573,7 +573,7 @@ registers_set_one(uint8_t page, uint8_t offset, uint16_t value)
 				if (conf[PX4IO_P_RC_CONFIG_DEADZONE] > 500) {
 					count++;
 				}
-				if (conf[PX4IO_P_RC_CONFIG_ASSIGNMENT] >= PX4IO_CONTROL_CHANNELS) {
+				if (conf[PX4IO_P_RC_CONFIG_ASSIGNMENT] >= PX4IO_RC_MAPPED_CONTROL_CHANNELS) {
 					count++;
 				}
 
diff --git a/src/modules/px4iofirmware/sbus.c b/src/modules/px4iofirmware/sbus.c
index c523df6ca..68a52c413 100644
--- a/src/modules/px4iofirmware/sbus.c
+++ b/src/modules/px4iofirmware/sbus.c
@@ -239,7 +239,7 @@ sbus_decode(hrt_abstime frame_time, uint16_t *values, uint16_t *num_values, uint
 	}
 
 	/* decode switch channels if data fields are wide enough */
-	if (PX4IO_INPUT_CHANNELS > 17 && chancount > 15) {
+	if (PX4IO_RC_INPUT_CHANNELS > 17 && chancount > 15) {
 		chancount = 18;
 
 		/* channel 17 (index 16) */