[rem later] Simple LPM application

examples/lpm/Makefile

@@ -0,0 +1,33 @@
+# name of your application
+APPLICATION = lpm_example
+
+# If no BOARD is found in the environment, use this default:
+BOARD ?= msbiot
+
+# This has to be the absolute path to the RIOT base directory:
+RIOTBASE ?= $(CURDIR)/../..
+
+# Define default pin mappings for some boards:
+ifneq (,$(filter stm32f4discovery,$(BOARD)))
+  export WKUP_GPIO ?= GPIO_0
+endif
+ifneq (,$(filter msbiot,$(BOARD)))
+  export WKUP_GPIO ?= GPIO_8
+endif
+
+ifneq (,$(WKUP_GPIO))
+  CFLAGS += -DWKUP_GPIO=$(WKUP_GPIO)
+else
+  # set random default
+  CFLAGS += -DWKUP_GPIO=GPIO_0
+endif
+
+# Comment this out to disable code in RIOT that does safety checking
+# which is not needed in a production environment but helps in the
+# development process:
+CFLAGS += -DDEVELHELP
+
+# Change this to 0 show compiler invocation lines by default:
+QUIET ?= 1
+
+include $(RIOTBASE)/Makefile.include

examples/lpm/main.c

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+/*
+ * Copyright (C) 2014 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     examples
+ * @{
+ *
+ * @file
+ * @brief       LPM example application
+ *
+ * @author      Fabian Nack <nack@inf.fu-berlin.de>
+ *
+ * @}
+ */
+
+#ifndef WKUP_GPIO
+#error "WKUP_GPIO not defined"
+#endif
+
+#include <stdio.h>
+
+#include "cpu-conf.h"
+#include "periph/gpio.h"
+#include "arch/lpm_arch.h"
+
+static void button_handler(void *args)
+{
+    lpm_arch_awake();
+}
+
+int main(void)
+{
+    puts("LPM example application");
+
+    gpio_init_int(WKUP_GPIO, GPIO_NOPULL, GPIO_RISING, &button_handler, 0);
+
+    /* Check whether the device was reset from standby */
+    if (PWR->CSR & PWR_CSR_SBF) {
+        puts("LPM tests successful");
+        PWR->CR |= PWR_CR_CSBF;
+        return 0;
+    }
+
+    lpm_arch_init();
+
+    puts("Entering LPM_IDLE");
+    lpm_arch_set(LPM_IDLE);
+    puts("Successfully awoke from LPM_IDLE");
+
+    puts("Entering LPM_SLEEP");
+    lpm_arch_set(LPM_SLEEP);
+    puts("Successfully awoke from LPM_SLEEP");
+
+    puts("Entering LPM_POWERDOWN");
+    lpm_arch_set(LPM_POWERDOWN);
+
+    /* Never reached */
+    return 0;
+}