Add Universitaet Tuebingen thermocouple sensor.

conf/messages.xml

@@ -859,7 +859,24 @@
     <field name="speed_sp" type="float"/>
   </message>
 
-  <!--126 is free -->
+  <message name="TEMP_TCOUPLE" id="126">
+    <field name="fval0" type="float"/>
+    <field name="fval1" type="float"/>
+    <field name="fval2" type="float"/>
+    <field name="fval3" type="float"/>
+    <field name="fref0" type="float"/>
+    <field name="fref1" type="float"/>
+    <field name="fref2" type="float"/>
+    <field name="fref3" type="float"/>
+    <field name="val0"  type="uint16"/>
+    <field name="val1"  type="uint16"/>
+    <field name="val2"  type="uint16"/>
+    <field name="val3"  type="uint16"/>
+    <field name="ref0"  type="uint16"/>
+    <field name="ref1"  type="uint16"/>
+    <field name="ref2"  type="uint16"/>
+    <field name="ref3"  type="uint16"/>
+  </message>
 
   <message name="SHT_I2C_STATUS" id="127">
     <field name="ihumid" type="uint16"/>

conf/modules/temp_tcouple_adc.xml

@@ -0,0 +1,17 @@
+<!DOCTYPE module SYSTEM "module.dtd">
+
+<module name="temp_tcouple_adc" dir="meteo">
+  <header>
+    <file name="temp_tcouple_adc.h"/>
+  </header>
+  <init fun="temp_tcouple_adc_init()"/>
+  <periodic fun="temp_tcouple_adc_periodic()" freq="60"/>
+  <makefile target="ap">
+    <file name="temp_tcouple_adc.c"/>
+    <define name="ADC_CHANNEL_TEMP_REF" value="ADC_4"/>
+    <define name="USE_ADC_4"/>
+    <define name="ADC_CHANNEL_TEMP_VAL" value="ADC_3"/>
+    <define name="USE_ADC_3"/>
+  </makefile>
+</module>
+

sw/airborne/modules/meteo/temp_tcouple_adc.c

@@ -0,0 +1,91 @@
+/*
+ * $Id: temp_tcouple_adc.c $
+ *
+ * Copyright (C) 2011 Martin Mueller
+ *
+ * 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 temp_tcouple_adc.c
+ *  \brief Universitaet Tuebingen thermocouple interface
+ *
+ *   This reads the values for reference and measurement temperature 
+ *   from the Universitaet Tuebingen thermocouple sensor.
+ */
+
+
+#include "mcu_periph/adc.h"
+#include "mcu_periph/uart.h"
+#include "messages.h"
+#include "downlink.h"
+#include "modules/meteo/temp_tcouple_adc.h"
+
+#ifndef ADC_CHANNEL_TEMP_REF
+#define ADC_CHANNEL_TEMP_REF ADC_4
+#endif
+#ifndef ADC_CHANNEL_TEMP_VAL
+#define ADC_CHANNEL_TEMP_VAL ADC_3
+#endif
+
+#ifndef ADC_CHANNEL_TEMP_TCOUPLE_NB_SAMPLES
+#define ADC_CHANNEL_TEMP_TCOUPLE_NB_SAMPLES 16
+#endif
+
+#ifndef DOWNLINK_DEVICE
+#define DOWNLINK_DEVICE DOWNLINK_AP_DEVICE
+#endif
+
+uint16_t ref[TCOUPLE_NB], val[TCOUPLE_NB];
+float    fref[TCOUPLE_NB], fval[TCOUPLE_NB];
+int32_t  temp_cnt;
+
+static struct adc_buf buf_temp_tcouple_ref;
+static struct adc_buf buf_temp_tcouple_val;
+
+void temp_tcouple_adc_init( void ) {
+  adc_buf_channel(ADC_CHANNEL_TEMP_REF,
+                  &buf_temp_tcouple_ref,
+                  ADC_CHANNEL_TEMP_TCOUPLE_NB_SAMPLES);
+  adc_buf_channel(ADC_CHANNEL_TEMP_VAL,
+                  &buf_temp_tcouple_val,
+                  ADC_CHANNEL_TEMP_TCOUPLE_NB_SAMPLES);
+  temp_cnt = 0;
+}
+
+void temp_tcouple_adc_periodic( void ) {
+  val[temp_cnt] = buf_temp_tcouple_val.sum / buf_temp_tcouple_val.av_nb_sample;
+  ref[temp_cnt] = buf_temp_tcouple_ref.sum / buf_temp_tcouple_ref.av_nb_sample;
+
+  /* no voltage divider, 10 bits adc, 3.3V max */
+  /* T = U * 52.288899706 - 7.977784737996595 */
+  fval[temp_cnt] = ((float)(val[temp_cnt] * 3.3) / 1023.)
+                     * 52.288899706 - 7.977784737996595;
+  fref[temp_cnt] = ((float)(ref[temp_cnt] * 3.3) / 1023.)
+                     * 100. - 13.;
+
+  if (++temp_cnt >= TCOUPLE_NB) {
+    DOWNLINK_SEND_TEMP_TCOUPLE(DefaultChannel, 
+          &fval[0], &fval[1], &fval[2], &fval[3],
+          &fref[0], &fref[1], &fref[2], &fref[3],
+          &val[0], &val[1], &val[2], &val[3],
+          &ref[0], &ref[1], &ref[2], &ref[3]);
+    temp_cnt = 0;
+  }
+}
+

sw/airborne/modules/meteo/temp_tcouple_adc.h

@@ -0,0 +1,14 @@
+#ifndef TEMP_TCOUPLE_ADC_H
+#define TEMP_TCOUPLE_ADC_H
+
+#include "std.h"
+
+#define TCOUPLE_NB 4
+
+extern uint16_t up[TCOUPLE_NB], dn[TCOUPLE_NB];
+extern int32_t  tcouple_cnt;
+
+void temp_tcouple_adc_init(void);
+void temp_tcouple_adc_periodic(void);
+
+#endif