nrf52dk: platform support

platform/nrf52dk/dev/temperature-sensor.c

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+/*
+ * Copyright (c) 2015, Nordic Semiconductor
+ * 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
+ *
+ */
+
+/**
+ * \addtogroup nrf52dk-devices Device drivers
+ * @{
+ *
+ * \addtogroup nrf52dk-devices-temp Temperature sensor driver
+ * This is a driver for nRF52832 hardware sensor.
+ *
+ * @{
+ *
+ * \file
+ *         Temperature sensor implementation.
+ * \author
+ *         Wojciech Bober <wojciech.bober@nordicsemi.no>
+ *
+ */
+#ifndef SOFTDEVICE_PRESENT
+#include "nrf_temp.h"
+#else
+#include "nrf_soc.h"
+#endif
+#include "contiki.h"
+#include "dev/temperature-sensor.h"
+
+
+const struct sensors_sensor temperature_sensor;
+
+/*---------------------------------------------------------------------------*/
+/**
+ * \brief Returns device temperature
+ * \param type ignored
+ * \return Device temperature in degrees Celsius
+ */
+static int
+value(int type)
+{
+#ifndef SOFTDEVICE_PRESENT
+  return nrf_temp_read();
+#else
+  int32_t temp;
+  sd_temp_get(&temp);
+  return temp >> 2;
+#endif
+}
+/*---------------------------------------------------------------------------*/
+/**
+ * \brief Configures temperature sensor
+ * \param type initializes the hardware sensor when \a type is set to
+ *             \a SENSORS_HW_INIT
+ * \param c ignored
+ * \return 1
+ * \note  This function does nothing when SoftDevice is present
+ */
+static int
+configure(int type, int c)
+{
+#ifndef SOFTDEVICE_PRESENT
+  if (type == SENSORS_HW_INIT) {
+    nrf_temp_init();
+  }
+#endif
+  return 1;
+}
+/**
+ * \brief Return temperature sensor status
+ * \param type ignored
+ * \return 1
+ */
+/*---------------------------------------------------------------------------*/
+static int
+status(int type)
+{
+  return 1;
+}
+/*---------------------------------------------------------------------------*/
+SENSORS_SENSOR(temperature_sensor, TEMPERATURE_SENSOR, value, configure, status);
+/**
+ * @}
+ * @}
+ */