[modules] add digital_cam_shoot_rc.xml

module to use radio channel as remote camera trigger
closes #937

conf/modules/digital_cam_shoot_rc.xml

@@ -0,0 +1,26 @@
+<!DOCTYPE module SYSTEM "./module.dtd">
+
+<module name="digital_cam_shoot_rc"  dir="digital_cam">
+  <doc>
+    <description>
+      Digital camera control using radio channel.
+      With this module you can take pictures using a radio channel.
+      When you put the channel to max the picture are taken.
+      If the channel goes high for more than 0.75s a picture is taken every 1sec.
+      Only usable for fixedwing firmware.
+    </description>
+    <define name="DC_RADIO_SHOOT" value="RADIO_xxx" description="specifies the channel to be used to trigger the camera by radio transmiter"/>
+  </doc>
+  <depend require="digital_cam"/>
+  <header>
+    <file name="dc_shoot_rc.h"/>
+  </header>
+
+  <periodic fun="dc_shoot_rc_periodic()" freq="4" autorun="TRUE"/>
+
+  <makefile>
+    <define name="DIGITAL_CAM_SHOOT_RC"/>
+    <file name="dc_shoot_rc.c"/>
+  </makefile>
+
+</module>

sw/airborne/modules/digital_cam/dc_shoot_rc.c

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2014 Eduardo Lavratti <agressiva@hotmail.com>
+ *
+ * This file is part of paparazzi.
+ *
+ * paparazzi is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * paparazzi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with paparazzi; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/** @file modules/digital_cam/dc_shoot_rc.c
+ * Digital Camera remote shoot using radio channel.
+ *
+ * Use radio channel to take a picture.
+ * Only works with fixedwing firmware.
+ */
+
+#include "dc_shoot_rc.h"
+#include "inter_mcu.h"
+#include "dc.h"
+
+#ifndef DC_RADIO_SHOOT
+#error "You need to define DC_RADIO_SHOT to a RADIO_xxx channel to use this module"
+#endif
+
+#define DC_RADIO_SHOOT_THRESHOLD 3000
+
+void dc_shoot_rc_periodic(void)
+{
+  static uint8_t rd_shoot = 0;
+  static uint8_t rd_num = 0;
+
+  if ((rd_shoot == 0) && (fbw_state->channels[DC_RADIO_SHOOT] > DC_RADIO_SHOOT_THRESHOLD)) {
+    dc_send_command(DC_SHOOT);
+    rd_shoot = 1;
+  }
+  if ((rd_shoot == 1) && (rd_num < 4)) {
+    rd_num = rd_num + 1;
+  }
+  else {
+    rd_num = 0;
+    rd_shoot = 0;
+  }
+}

sw/airborne/modules/digital_cam/dc_shoot_rc.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2014 Eduardo Lavratti <agressiva@hotmail.com>
+ *
+ * This file is part of paparazzi.
+ *
+ * paparazzi is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * paparazzi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with paparazzi; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/** @file modules/digital_cam/dc_shoot_rc.h
+ * Digital Camera remote shoot using radio channel.
+ *
+ * Use radio channel to take a picture.
+ * Only works with fixedwing firmware.
+ */
+
+#ifndef DC_SHOOT_RC_H
+#define DC_SHOOT_RC_H
+
+/** periodic 4Hz function */
+extern void dc_shoot_rc_periodic(void);
+
+#endif // DC_SHOOT_RC_H