nrf52dk: cpu/nrf52832 support

cpu/nrf52832/rtimer-arch.c

@@ -0,0 +1,110 @@
+/*
+ * 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 copyright holder 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 HOLDER 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 nrf52832
+ * @{
+ *
+ * \file
+ *      Implementation of the architecture dependent rtimer functions for the nRF52
+ *
+ * \author
+ *      Wojciech Bober <wojciech.bober@nordicsemi.no>
+ */
+/*---------------------------------------------------------------------------*/
+#include <stdint.h>
+#include <stddef.h>
+#include "nrf.h"
+#include "nrf_drv_timer.h"
+#include "app_error.h"
+#include "contiki.h"
+#include "platform-conf.h"
+
+static const nrf_drv_timer_t timer = NRF_DRV_TIMER_INSTANCE(PLATFORM_TIMER_INSTANCE_ID); /**< Timer instance used for rtimer */
+
+/**
+ * \brief Handler for timer events.
+ *
+ * \param event_type type of an event that should be handled
+ * \param p_context opaque data pointer passed from nrf_drv_timer_init()
+ */
+static void
+timer_event_handler(nrf_timer_event_t event_type, void* p_context)
+{
+  switch (event_type) {
+    case NRF_TIMER_EVENT_COMPARE1:
+      rtimer_run_next();
+      break;
+
+    default:
+      //Do nothing.
+      break;
+  }
+}
+/*---------------------------------------------------------------------------*/
+/**
+ * \brief Initialize platform rtimer
+ */
+void
+rtimer_arch_init(void)
+{
+  ret_code_t err_code = nrf_drv_timer_init(&timer, NULL, timer_event_handler);
+  APP_ERROR_CHECK(err_code);
+  nrf_drv_timer_enable(&timer);
+}
+/*---------------------------------------------------------------------------*/
+/**
+ * \brief Schedules an rtimer task to be triggered at time t
+ * \param t The time when the task will need executed.
+ *
+ * \e t is an absolute time, in other words the task will be executed AT
+ * time \e t, not IN \e t rtimer ticks.
+ *
+ * This function schedules a one-shot event with the nRF RTC.
+ */
+void
+rtimer_arch_schedule(rtimer_clock_t t)
+{
+  nrf_drv_timer_compare(&timer, NRF_TIMER_CC_CHANNEL1, t, true);
+}
+/*---------------------------------------------------------------------------*/
+/**
+ * \brief Returns the current real-time clock time
+ * \return The current rtimer time in ticks
+ *
+ */
+rtimer_clock_t
+rtimer_arch_now()
+{
+  return nrf_drv_timer_capture(&timer, NRF_TIMER_CC_CHANNEL0);
+}
+/*---------------------------------------------------------------------------*/
+/**
+ * @}
+ */