IO driver: Support pwm reversal, prepare config parameters

src/drivers/px4io/module.mk

@@ -40,7 +40,8 @@ MODULE_COMMAND		= px4io
 SRCS			= px4io.cpp \
 			  px4io_uploader.cpp \
 			  px4io_serial.cpp \
-			  px4io_i2c.cpp
+			  px4io_i2c.cpp \
+			  px4io_params.c
 
 # XXX prune to just get UART registers
 INCLUDE_DIRS    += $(NUTTX_SRC)/arch/arm/src/stm32 $(NUTTX_SRC)/arch/arm/src/common

src/drivers/px4io/px4io_params.c

@@ -0,0 +1,131 @@
+/****************************************************************************
+ *
+ *   Copyright (c) 2015 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
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name PX4 nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/**
+ * @file px4io_params.c
+ *
+ * Parameters defined by the PX4IO driver
+ *
+ * @author Lorenz Meier <lorenz@px4.io>
+ */
+
+#include <nuttx/config.h>
+#include <systemlib/param/param.h>
+
+/**
+ * Pre-scaler / Inverter for main output channel 1
+ *
+ * Set to 1 to invert the channel.
+ *
+ * @min 0
+ * @max 1
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_MAIN_SCALE1, 1);
+
+/**
+ * Pre-scaler / Inverter for main output channel 2
+ *
+ * Set to 1 to invert the channel.
+ *
+ * @min 0
+ * @max 1
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_MAIN_SCALE2, 1);
+
+/**
+ * Pre-scaler / Inverter for main output channel 3
+ *
+ * Set to 1 to invert the channel.
+ *
+ * @min 0
+ * @max 1
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_MAIN_SCALE3, 1);
+
+/**
+ * Pre-scaler / Inverter for main output channel 4
+ *
+ * Set to 1 to invert the channel.
+ *
+ * @min 0
+ * @max 1
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_MAIN_SCALE4, 1);
+
+/**
+ * Pre-scaler / Inverter for main output channel 5
+ *
+ * Set to 1 to invert the channel.
+ *
+ * @min 0
+ * @max 1
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_MAIN_SCALE5, 1);
+
+/**
+ * Pre-scaler / Inverter for main output channel 6
+ *
+ * Set to 1 to invert the channel.
+ *
+ * @min 0
+ * @max 1
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_MAIN_SCALE6, 1);
+
+/**
+ * Pre-scaler / Inverter for main output channel 7
+ *
+ * Set to 1 to invert the channel.
+ *
+ * @min 0
+ * @max 1
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_MAIN_SCALE7, 1);
+
+/**
+ * Pre-scaler / Inverter for main output channel 8
+ *
+ * Set to 1 to invert the channel.
+ *
+ * @min 0
+ * @max 1
+ * @group PWM Outputs
+ */
+PARAM_DEFINE_INT32(PWM_MAIN_SCALE8, 1);