Added simple energest example

examples/libs/energest/Makefile

+CONTIKI_PROJECT = example-energest
+all: $(CONTIKI_PROJECT)
+
+CONTIKI = ../../..
+include $(CONTIKI)/Makefile.include

examples/libs/energest/example-energest.c

+/*
+ * Copyright (c) 2017, RISE SICS.
+ * 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 HOLDER 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.
+ */
+
+#include <stdio.h>
+
+#include "contiki.h"
+#include "sys/energest.h"
+
+PROCESS(energest_example_process, "energest example process");
+AUTOSTART_PROCESSES(&energest_example_process);
+/*---------------------------------------------------------------------------*/
+static inline unsigned long
+to_seconds(uint64_t time)
+{
+  return (unsigned long)(time / ENERGEST_SECOND);
+}
+/*---------------------------------------------------------------------------*/
+/*
+ * This Process will periodically print energest values for the last minute.
+ *
+ */
+PROCESS_THREAD(energest_example_process, ev, data)
+{
+  static struct etimer periodic_timer;
+
+  PROCESS_BEGIN();
+
+  etimer_set(&periodic_timer, CLOCK_SECOND * 10);
+  while(1) {
+    PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic_timer));
+    etimer_reset(&periodic_timer);
+
+    /*
+     * Update all energest times. Should always be called before energest
+     * times are read.
+     */
+    energest_flush();
+
+    printf("\nEnergest:\n");
+    printf(" CPU          %4lus LPM      %4lus DEEP LPM %4lus  Total time %lus\n",
+           to_seconds(energest_type_time(ENERGEST_TYPE_CPU)),
+           to_seconds(energest_type_time(ENERGEST_TYPE_LPM)),
+           to_seconds(energest_type_time(ENERGEST_TYPE_DEEP_LPM)),
+           to_seconds(ENERGEST_GET_TOTAL_TIME()));
+    printf(" Radio LISTEN %4lus TRANSMIT %4lus OFF      %4lus\n",
+           to_seconds(energest_type_time(ENERGEST_TYPE_LISTEN)),
+           to_seconds(energest_type_time(ENERGEST_TYPE_TRANSMIT)),
+           to_seconds(ENERGEST_GET_TOTAL_TIME()
+                      - energest_type_time(ENERGEST_TYPE_TRANSMIT)
+                      - energest_type_time(ENERGEST_TYPE_LISTEN)));
+  }
+
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/

examples/libs/energest/project-conf.h

+/*
+ * Copyright (c) 2017, RISE SICS.
+ * 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 HOLDER 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.
+ */
+
+#ifndef PROJECT_CONF_H_
+#define PROJECT_CONF_H_
+
+#define ENERGEST_CONF_ON 1
+
+#endif /* PROJECT_CONF_H_ */