samples: intel_s1000: add background thread

Add background thread in audio sample app for
Intel® Sue Creek S1000 board

Signed-off-by: Sathish Kuttan <sathish.k.kuttan@intel.com>

samples/boards/intel_s1000_crb/audio/src/framework.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2019 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define LOG_LEVEL LOG_LEVEL_INF
+#include <logging/log.h>
+LOG_MODULE_REGISTER(framework);
+
+#include <zephyr.h>
+
+#include "audio_core.h"
+
+extern int tun_drv_packet_handler(void);
+static int framework_background_thread(void);
+
+K_THREAD_DEFINE(framework_bg_thread_id, FRAMEWORK_BG_THREAD_STACK_SIZE,
+		framework_background_thread, NULL, NULL, NULL,
+		FRAMEWORK_BG_THREAD_PRIORITY, 0, K_NO_WAIT);
+
+static int framework_background_thread(void)
+{
+	LOG_INF("Starting framework background thread ...");
+
+	while (true) {
+		tun_drv_packet_handler();
+		audio_core_process_background_tasks();
+	}
+}