[rem later] lpm app adaption

examples/lpm/Makefile

@@ -30,4 +30,6 @@ CFLAGS += -DDEVELHELP
 # Change this to 0 show compiler invocation lines by default:
 QUIET ?= 1
 
+USEMODULE += vtimer
+
 include $(RIOTBASE)/Makefile.include

examples/lpm/main.c

@@ -27,6 +27,7 @@
 #include "cpu-conf.h"
 #include "periph/gpio.h"
 #include "arch/lpm_arch.h"
+#include "vtimer.h"
 
 static void button_handler(void *args)
 {
@@ -37,6 +38,8 @@ int main(void)
 {
     puts("LPM example application");
 
+    vtimer_init();
+
     gpio_init_int(WKUP_GPIO, GPIO_NOPULL, GPIO_RISING, &button_handler, 0);
 
     /* Check whether the device was reset from standby */
@@ -49,14 +52,17 @@ int main(void)
     lpm_arch_init();
 
     puts("Entering LPM_IDLE");
+    vtimer_usleep(100000);
     lpm_arch_set(LPM_IDLE);
     puts("Successfully awoke from LPM_IDLE");
 
     puts("Entering LPM_SLEEP");
+    vtimer_usleep(100000);
     lpm_arch_set(LPM_SLEEP);
     puts("Successfully awoke from LPM_SLEEP");
 
     puts("Entering LPM_POWERDOWN");
+    vtimer_usleep(100000);
     lpm_arch_set(LPM_POWERDOWN);
 
     /* Never reached */