Added deep sleep example

miosix/_examples/deep_sleep/main-test.cpp

+/***************************************************************************
+ *   Copyright (C) 2019 by Marsella Daniele                                *
+ *                                                                         *
+ *   This program 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 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program 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.                          *
+ *                                                                         *
+ *   As a special exception, if other files instantiate templates or use   *
+ *   macros or inline functions from this file, or you compile this file   *
+ *   and link it with other works to produce a work based on this file,    *
+ *   this file does not by itself cause the resulting work to be covered   *
+ *   by the GNU General Public License. However the source code for this   *
+ *   file must still be made available in accordance with the GNU General  *
+ *   Public License. This exception does not invalidate any other reasons  *
+ *   why a work based on this file might be covered by the GNU General     *
+ *   Public License.                                                       *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, see <http://www.gnu.org/licenses/>   *
+ ***************************************************************************/ 
+
+#include <cstdio>
+#include "miosix.h"
+#include "interfaces/cstimer.h"
+
+using namespace std;
+using namespace miosix;
+
+int main()
+{
+    ContextSwitchTimer& cstimer = ContextSwitchTimer::instance();
+    long long int timeBefore, timeAfter;
+    using sleepLed = Gpio<GPIOD_BASE, 13>;     // orange
+    using deepSleepLed = Gpio<GPIOD_BASE, 15>; // blue
+    sleepLed::mode(Mode::OUTPUT);
+    deepSleepLed::mode(Mode::OUTPUT);
+    int i=1;
+    for(;;)
+    {
+        printf("Going into deep sleep\n");
+        fflush(stdout);
+        delayMs(500);
+        deepSleepLed::high();
+        timeBefore = cstimer.getCurrentTime();
+        Thread::sleep(i * 1000);
+        timeAfter = cstimer.getCurrentTime();
+        deepSleepLed::low();
+        printf("Elapsed time: %lld \n", timeAfter - timeBefore);
+        {
+            DeepSleepLock dl;
+            printf("Going into normal sleep\n");
+            fflush(stdout);
+            delayMs(500);
+            sleepLed::high();
+            timeBefore = cstimer.getCurrentTime();
+            Thread::sleep(i * 1000);
+            timeAfter = cstimer.getCurrentTime();
+            sleepLed::low();
+            printf("Elapsed time: %lld \n", timeAfter - timeBefore);
+        }
+        i++;
+    }
+}