Added sleep application

apps/sleep_sdk14/Makefile

@@ -0,0 +1,24 @@
+PROJECT_NAME = $(shell basename "$(realpath ./)")
+
+APPLICATION_SRCS = $(notdir $(wildcard ./*.c))
+APPLICATION_SRCS += app_timer.c
+APPLICATION_SRCS += app_error.c
+APPLICATION_SRCS += app_error_weak.c
+APPLICATION_SRCS += nrf_drv_common.c
+APPLICATION_SRCS += led.c
+APPLICATION_SRCS += nrf_sdh.c
+APPLICATION_SRCS += nrf_section_iter.c
+APPLICATION_SRCS += nrf_sdh_ble.c
+APPLICATION_SRCS += app_util_platform.c
+
+NRF_MODEL = nrf52840
+
+SDK_VERSION = 14
+SOFTDEVICE_MODEL = s140
+
+NRF_BASE_PATH ?= ../..
+
+LIBRARY_PATHS += .  ../../include
+SOURCE_PATHS += ../../src
+
+include $(NRF_BASE_PATH)/make/Makefile

apps/sleep_sdk14/main.c

@@ -0,0 +1,31 @@
+/* Blink
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "nrf.h"
+#include "nrf_soc.h"
+#include "nrf_delay.h"
+#include "nrf_sdh.h"
+#include "nrf_sdh_ble.h"
+
+int main(void) {
+    uint32_t err_code;
+
+    // Initialize.
+    err_code = nrf_sdh_enable_request();
+    APP_ERROR_CHECK(err_code);
+
+    if (!nrf_sdh_is_enabled()) {
+      printf("Failed to enable softdevice\n");
+    }
+
+    uint32_t ram_start = 0;
+    err_code = nrf_sdh_ble_app_ram_start_get(&ram_start);
+    APP_ERROR_CHECK(err_code);
+
+    // Enter main loop.
+    while (1) {
+      sd_app_evt_wait();
+    }
+}