diff --git a/example/Makefile.am b/example/Makefile.am
index 6c24e053a..990ca0ac8 100644
--- a/example/Makefile.am
+++ b/example/Makefile.am
@@ -1,5 +1,5 @@
 bin_PROGRAMS = test
-test_SOURCES = test.c ../src/btstack.c ../src/hci.c \
+test_SOURCES = test.c ../src/btstack.c ../src/utils.c ../src/hci.c \
                 ../src/l2cap.c ../src/linked_list.c ../src/run_loop.c \
                 ../src/hci_dump.c ../src/hci_cmds.c ../src/socket_connection.c
 
diff --git a/project.xcodeproj/project.pbxproj b/project.xcodeproj/project.pbxproj
index 8a9dc2ff8..615a76af1 100644
--- a/project.xcodeproj/project.pbxproj
+++ b/project.xcodeproj/project.pbxproj
@@ -10,6 +10,8 @@
 		9C00F7321017ACC3008DAB17 /* socket_connection.c in Sources */ = {isa = PBXBuildFile; fileRef = 9C00F7301017ACC3008DAB17 /* socket_connection.c */; };
 		9C00F7D71019082F008DAB17 /* hci_cmds.c in Sources */ = {isa = PBXBuildFile; fileRef = 9C00F7D61019082F008DAB17 /* hci_cmds.c */; };
 		9C00F7D81019082F008DAB17 /* hci_cmds.c in Sources */ = {isa = PBXBuildFile; fileRef = 9C00F7D61019082F008DAB17 /* hci_cmds.c */; };
+		9C00F86410191097008DAB17 /* utils.c in Sources */ = {isa = PBXBuildFile; fileRef = 9C00F86210191097008DAB17 /* utils.c */; };
+		9C00F86510191097008DAB17 /* utils.c in Sources */ = {isa = PBXBuildFile; fileRef = 9C00F86210191097008DAB17 /* utils.c */; };
 		9C1F0E9A0FDAE023008F472F /* run_loop.c in Sources */ = {isa = PBXBuildFile; fileRef = 9C1F0E980FDAE023008F472F /* run_loop.c */; };
 		9C2071F310014D3200A07EA4 /* hci_transport_usb.c in Sources */ = {isa = PBXBuildFile; fileRef = 9C2071F210014D3200A07EA4 /* hci_transport_usb.c */; };
 		9C20720F10025E0500A07EA4 /* libusb-1.0.dylib in Frameworks */ = {isa = PBXBuildFile; fileRef = 9C20720E10025E0500A07EA4 /* libusb-1.0.dylib */; };
@@ -49,6 +51,8 @@
 		9C00F7311017ACC3008DAB17 /* socket_connection.h */ = {isa = PBXFileReference; fileEncoding = 5; lastKnownFileType = sourcecode.c.h; name = socket_connection.h; path = src/socket_connection.h; sourceTree = "<group>"; };
 		9C00F7D51019082F008DAB17 /* hci_cmds.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = hci_cmds.h; path = src/hci_cmds.h; sourceTree = "<group>"; };
 		9C00F7D61019082F008DAB17 /* hci_cmds.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; name = hci_cmds.c; path = src/hci_cmds.c; sourceTree = "<group>"; };
+		9C00F86210191097008DAB17 /* utils.c */ = {isa = PBXFileReference; fileEncoding = 5; lastKnownFileType = sourcecode.c.c; name = utils.c; path = src/utils.c; sourceTree = "<group>"; };
+		9C00F86310191097008DAB17 /* utils.h */ = {isa = PBXFileReference; fileEncoding = 5; lastKnownFileType = sourcecode.c.h; name = utils.h; path = src/utils.h; sourceTree = "<group>"; };
 		9C1F0E980FDAE023008F472F /* run_loop.c */ = {isa = PBXFileReference; fileEncoding = 5; lastKnownFileType = sourcecode.c.c; name = run_loop.c; path = src/run_loop.c; sourceTree = "<group>"; };
 		9C1F0E990FDAE023008F472F /* run_loop.h */ = {isa = PBXFileReference; fileEncoding = 5; lastKnownFileType = sourcecode.c.h; name = run_loop.h; path = src/run_loop.h; sourceTree = "<group>"; };
 		9C2071F210014D3200A07EA4 /* hci_transport_usb.c */ = {isa = PBXFileReference; fileEncoding = 5; lastKnownFileType = sourcecode.c.c; name = hci_transport_usb.c; path = src/hci_transport_usb.c; sourceTree = "<group>"; };
@@ -121,6 +125,10 @@
 				9CC813A40FFC0A51002816F9 /* daemon.c */,
 				9C46FC350FA906F700ABEF05 /* hci.h */,
 				9C46FC340FA906F700ABEF05 /* hci.c */,
+				9C00F7D51019082F008DAB17 /* hci_cmds.h */,
+				9C00F7D61019082F008DAB17 /* hci_cmds.c */,
+				9C7ECBB30FCC95DD0085DAC5 /* hci_dump.h */,
+				9C7ECBB40FCC95DD0085DAC5 /* hci_dump.c */,
 				9C46FC380FA906F700ABEF05 /* hci_transport.h */,
 				9C46FC370FA906F700ABEF05 /* hci_transport_h4.h */,
 				9C46FC360FA906F700ABEF05 /* hci_transport_h4.c */,
@@ -128,16 +136,14 @@
 				9C2071F210014D3200A07EA4 /* hci_transport_usb.c */,
 				9C88500C0FBF6702004980E4 /* l2cap.c */,
 				9C88500D0FBF6702004980E4 /* l2cap.h */,
-				9C7ECBB30FCC95DD0085DAC5 /* hci_dump.h */,
-				9C7ECBB40FCC95DD0085DAC5 /* hci_dump.c */,
 				9C7B5ABE100BD3340065D87E /* linked_list.h */,
 				9C7B5ABF100BD3340065D87E /* linked_list.c */,
 				9C1F0E990FDAE023008F472F /* run_loop.h */,
 				9C1F0E980FDAE023008F472F /* run_loop.c */,
 				9C00F7301017ACC3008DAB17 /* socket_connection.c */,
 				9C00F7311017ACC3008DAB17 /* socket_connection.h */,
-				9C00F7D51019082F008DAB17 /* hci_cmds.h */,
-				9C00F7D61019082F008DAB17 /* hci_cmds.c */,
+				9C00F86210191097008DAB17 /* utils.c */,
+				9C00F86310191097008DAB17 /* utils.h */,
 			);
 			name = Source;
 			sourceTree = "<group>";
@@ -239,6 +245,7 @@
 				9C7B5AC0100BD3340065D87E /* linked_list.c in Sources */,
 				9C00F7321017ACC3008DAB17 /* socket_connection.c in Sources */,
 				9C00F7D71019082F008DAB17 /* hci_cmds.c in Sources */,
+				9C00F86510191097008DAB17 /* utils.c in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -255,6 +262,7 @@
 				9C7B5D0E100FC9D00065D87E /* run_loop.c in Sources */,
 				9C7B5D12100FC9F00065D87E /* l2cap.c in Sources */,
 				9C00F7D81019082F008DAB17 /* hci_cmds.c in Sources */,
+				9C00F86410191097008DAB17 /* utils.c in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/src/Makefile.am b/src/Makefile.am
index d5828ffd2..309b9fa2b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -15,18 +15,20 @@ BTdaemon_SOURCES =       \
     l2cap.c              \
     linked_list.c        \
     run_loop.c           \
-    socket_connection.c
+    socket_connection.c  \
+    utils.c
     
 include_HEADERS = \
-    bt_control.h                      \
-    bt_control_iphone.h               \
-    hci.h                             \
-    hci_cmds.h                        \
-    hci_dump.h                        \
-    hci_transport.h                   \
-    hci_transport_h4.h                \
-    hci_transport_usb.h               \
-    linked_list.h                     \
-    l2cap.h                           \
-    run_loop.h                        \
-    socket_connection.h                     
+    bt_control.h         \
+    bt_control_iphone.h  \
+    hci.h                \
+    hci_cmds.h           \
+    hci_dump.h           \
+    hci_transport.h      \
+    hci_transport_h4.h   \
+    hci_transport_usb.h  \
+    linked_list.h        \
+    l2cap.h              \
+    run_loop.h           \
+    socket_connection.h  \
+    utils.h
diff --git a/src/hci.c b/src/hci.c
index 8514a2db0..ec9168643 100644
--- a/src/hci.c
+++ b/src/hci.c
@@ -15,57 +15,37 @@
 // the stack is here
 static hci_stack_t       hci_stack;
 
-
-void bt_store_16(uint8_t *buffer, uint16_t pos, uint16_t value){
-    buffer[pos++] = value;
-    buffer[pos++] = value >> 8;
-}
-
-void bt_store_32(uint8_t *buffer, uint16_t pos, uint32_t value){
-    buffer[pos++] = value;
-    buffer[pos++] = value >> 8;
-    buffer[pos++] = value >> 16;
-    buffer[pos++] = value >> 24;
-}
-
-void bt_flip_addr(bd_addr_t dest, bd_addr_t src){
-    dest[0] = src[5];
-    dest[1] = src[4];
-    dest[2] = src[3];
-    dest[3] = src[2];
-    dest[4] = src[1];
-    dest[5] = src[0];
-}
-
-void hexdump(void *data, int size){
-    int i;
-    for (i=0; i<size;i++){
-        printf("%02X ", ((uint8_t *)data)[i]);
-    }
-    printf("\n");
-}
-
-/**
- * Linked link list 
- */
-
 /**
  * get link for given address
  *
  * @return connection OR NULL, if not found
  */
-#if 0
 static hci_connection_t *link_for_addr(bd_addr_t addr){
     return NULL;
 }
-#endif
 
 /** 
- * Handler called by HCI transport
+ * Dummy handler called by HCI
  */
 static void dummy_handler(uint8_t *packet, uint16_t size){
 }
 
+/**
+ * Dummy control handler
+ */
+static int null_control_function(void *config){
+    return 0;
+}
+static const char * null_control_name(void *config){
+    return "Hardware unknown";
+}
+static bt_control_t null_control = {
+    null_control_function,
+    null_control_function,
+    null_control_function,
+    null_control_name
+}; 
+
 static void acl_handler(uint8_t *packet, int size){
     hci_stack.acl_packet_handler(packet, size);
     
@@ -124,20 +104,6 @@ void hci_register_acl_packet_handler  (void (*handler)(uint8_t *packet, uint16_t
     hci_stack.acl_packet_handler = handler;
 }
 
-static int null_control_function(void *config){
-    return 0;
-}
-static const char * null_control_name(void *config){
-    return "Hardware unknown";
-}
-
-static bt_control_t null_control = {
-    null_control_function,
-    null_control_function,
-    null_control_function,
-    null_control_name
-}; 
-
 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control){
     
     // reference to use transport layer implementation
@@ -263,14 +229,13 @@ int hci_send_cmd_packet(uint8_t *packet, int size){
             hci_stack.event_packet_handler(event, 3);
             break;
         default:
-            // TODO log into hci dump as vendor specific"event"
+            // TODO log into hci dump as vendor specific "event"
             printf("Error: command %u not implemented\n:", READ_CMD_OCF(packet));
             break;
     }
     return 0;
 }
 
-
 /**
  * pre: numcmds >= 0 - it's allowed to send a command to the controller
  */
diff --git a/src/hci.h b/src/hci.h
index 32208d274..a6adb6989 100644
--- a/src/hci.h
+++ b/src/hci.h
@@ -7,84 +7,15 @@
 
 #pragma once
 
+#include "hci_cmds.h"
+#include "utils.h"
+#include "hci_transport.h"
+#include "bt_control.h"
+
 #include <stdint.h>
 #include <stdlib.h>
 #include <stdarg.h>
 
-#include "hci_cmds.h"
-#include "hci_transport.h"
-#include "bt_control.h"
-
-// helper for BT little endian format
-#define READ_BT_16( buffer, pos) ( ((uint16_t) buffer[pos]) | (((uint16_t)buffer[pos+1]) << 8))
-#define READ_BT_24( buffer, pos) ( ((uint32_t) buffer[pos]) | (((uint32_t)buffer[pos+1]) << 8) | (((uint32_t)buffer[pos+2]) << 16))
-#define READ_BT_32( buffer, pos) ( ((uint32_t) buffer[pos]) | (((uint32_t)buffer[pos+1]) << 8) | (((uint32_t)buffer[pos+2]) << 16) | (((uint32_t) buffer[pos+3])) << 24)
-
-// packet header lengh
-#define HCI_CMD_DATA_PKT_HDR	  0x03
-#define HCI_ACL_DATA_PKT_HDR	  0x04
-#define HCI_SCO_DATA_PKT_HDR	  0x03
-#define HCI_EVENT_PKT_HDR         0x02
-
-// Events from host controller to host
-#define HCI_EVENT_INQUIRY_COMPLETE				           0x01
-#define HCI_EVENT_INQUIRY_RESULT				           0x02
-#define HCI_EVENT_CONNECTION_COMPLETE			           0x03
-#define HCI_EVENT_CONNECTION_REQUEST			           0x04
-#define HCI_EVENT_DISCONNECTION_COMPLETE		      	   0x05
-#define HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT            0x06
-#define HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE	           0x07
-#define HCI_EVENT_ENCRIPTION_CHANGE                        0x08
-#define HCI_EVENT_CHANGE_CONNECTION_LINK_KEY_COMPLETE      0x09
-#define HCI_EVENT_MASTER_LINK_KEY_COMPLETE                 0x0A
-#define HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE  0x0B
-#define HCI_EVENT_READ_REMOTE_VERSION_INFORMATION_COMPLETE 0x0C
-#define HCI_EVENT_QOS_SETUP_COMPLETE			           0x0D
-#define HCI_EVENT_COMMAND_COMPLETE				           0x0E
-#define HCI_EVENT_COMMAND_STATUS				           0x0F
-#define HCI_EVENT_HARDWARE_ERROR                           0x10
-#define HCI_EVENT_FLUSH_OCCURED                            0x11
-#define HCI_EVENT_ROLE_CHANGE				               0x12
-#define HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS	      	   0x13
-#define HCI_EVENT_MODE_CHANGE_EVENT                        0x14
-#define HCI_EVENT_RETURN_LINK_KEYS                         0x15
-#define HCI_EVENT_PIN_CODE_REQUEST                         0x16
-#define HCI_EVENT_LINK_KEY_REQUEST                         0x17
-#define HCI_EVENT_LINK_KEY_NOTIFICATION                    0x18
-#define HCI_EVENT_DATA_BUFFER_OVERFLOW                     0x1A
-#define HCI_EVENT_MAX_SLOTS_CHANGED			               0x1B
-#define HCI_EVENT_READ_CLOCK_OFFSET_COMPLETE               0x1C
-#define NECTEVENT_ION_PACKET_TYPE_CHANGED                  0x1D
-#define HCI_EVENT_INQUIRY_RESULT_WITH_RSSI		      	   0x22
-#define HCI_EVENT_VENDOR_SPECIFIC				           0xFF
-
-// events from BTstack for application/client lib
-#define HCI_EVENT_BTSTACK_WORKING                          0x80
-#define HCI_EVENT_BTSTACK_STATE                            0x81
-
-#define COMMAND_COMPLETE_EVENT(event,cmd) ( event[0] == HCI_EVENT_COMMAND_COMPLETE && READ_BT_16(event,3) == cmd.opcode)
-
-/**
- * Default INQ Mode
- */
-#define HCI_INQUIRY_LAP 0x9E8B33L  // 0x9E8B33: General/Unlimited Inquiry Access Code (GIAC)
-
-/**
- * @brief Length of a bluetooth device address.
- */
-#define BD_ADDR_LEN 6
-typedef uint8_t bd_addr_t[BD_ADDR_LEN];
-
-/**
- * @brief The link key type
- */
-#define LINK_KEY_LEN 16
-typedef uint8_t link_key_t[LINK_KEY_LEN]; 
-
-/**
- * @brief hci connection handle type
- */
-typedef uint16_t hci_con_handle_t;
 
 typedef enum {
     HCI_POWER_OFF = 0,
@@ -118,7 +49,6 @@ typedef struct hci_connection {
 
 
 typedef struct {
-    
     hci_transport_t  * hci_transport;
     bt_control_t     * control;
     void             * config;
@@ -159,9 +89,6 @@ int hci_power_control(HCI_POWER_MODE mode);
  */
 uint32_t hci_run();
 
-//
-void hexdump(void *data, int size);
-
 // create and send hci command packets based on a template and a list of parameters
 int hci_send_cmd(hci_cmd_t *cmd, ...);
 
@@ -170,9 +97,3 @@ int hci_send_cmd_packet(uint8_t *packet, int size);
 
 // send ACL packet
 int hci_send_acl_packet(uint8_t *packet, int size);
-
-// helper
-extern void bt_store_16(uint8_t *buffer, uint16_t pos, uint16_t value);
-extern void bt_store_32(uint8_t *buffer, uint16_t pos, uint32_t value);
-extern void bt_flip_addr(bd_addr_t dest, bd_addr_t src);
-
diff --git a/src/hci_cmds.h b/src/hci_cmds.h
index 0b5bac22a..5c909f1c5 100644
--- a/src/hci_cmds.h
+++ b/src/hci_cmds.h
@@ -10,6 +10,12 @@
 #include <stdarg.h>
 #include <string.h>
 
+// packet header lenghts
+#define HCI_CMD_DATA_PKT_HDR	  0x03
+#define HCI_ACL_DATA_PKT_HDR	  0x04
+#define HCI_SCO_DATA_PKT_HDR	  0x03
+#define HCI_EVENT_PKT_HDR         0x02
+
 // calculate combined ogf/ocf value
 #define OPCODE(ogf, ocf) (ocf | ogf << 10)
 
@@ -27,6 +33,48 @@
 // cmds for BTstack
 #define HCI_BTSTACK_GET_STATE                              0x01
 
+// Events from host controller to host
+#define HCI_EVENT_INQUIRY_COMPLETE				           0x01
+#define HCI_EVENT_INQUIRY_RESULT				           0x02
+#define HCI_EVENT_CONNECTION_COMPLETE			           0x03
+#define HCI_EVENT_CONNECTION_REQUEST			           0x04
+#define HCI_EVENT_DISCONNECTION_COMPLETE		      	   0x05
+#define HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT            0x06
+#define HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE	           0x07
+#define HCI_EVENT_ENCRIPTION_CHANGE                        0x08
+#define HCI_EVENT_CHANGE_CONNECTION_LINK_KEY_COMPLETE      0x09
+#define HCI_EVENT_MASTER_LINK_KEY_COMPLETE                 0x0A
+#define HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE  0x0B
+#define HCI_EVENT_READ_REMOTE_VERSION_INFORMATION_COMPLETE 0x0C
+#define HCI_EVENT_QOS_SETUP_COMPLETE			           0x0D
+#define HCI_EVENT_COMMAND_COMPLETE				           0x0E
+#define HCI_EVENT_COMMAND_STATUS				           0x0F
+#define HCI_EVENT_HARDWARE_ERROR                           0x10
+#define HCI_EVENT_FLUSH_OCCURED                            0x11
+#define HCI_EVENT_ROLE_CHANGE				               0x12
+#define HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS	      	   0x13
+#define HCI_EVENT_MODE_CHANGE_EVENT                        0x14
+#define HCI_EVENT_RETURN_LINK_KEYS                         0x15
+#define HCI_EVENT_PIN_CODE_REQUEST                         0x16
+#define HCI_EVENT_LINK_KEY_REQUEST                         0x17
+#define HCI_EVENT_LINK_KEY_NOTIFICATION                    0x18
+#define HCI_EVENT_DATA_BUFFER_OVERFLOW                     0x1A
+#define HCI_EVENT_MAX_SLOTS_CHANGED			               0x1B
+#define HCI_EVENT_READ_CLOCK_OFFSET_COMPLETE               0x1C
+#define NECTEVENT_ION_PACKET_TYPE_CHANGED                  0x1D
+#define HCI_EVENT_INQUIRY_RESULT_WITH_RSSI		      	   0x22
+#define HCI_EVENT_VENDOR_SPECIFIC				           0xFF
+
+// events from BTstack for application/client lib
+#define HCI_EVENT_BTSTACK_WORKING                          0x80
+#define HCI_EVENT_BTSTACK_STATE                            0x81
+
+#define COMMAND_COMPLETE_EVENT(event,cmd) ( event[0] == HCI_EVENT_COMMAND_COMPLETE && READ_BT_16(event,3) == cmd.opcode)
+
+/**
+ * Default INQ Mode
+ */
+#define HCI_INQUIRY_LAP 0x9E8B33L  // 0x9E8B33: General/Unlimited Inquiry Access Code (GIAC)
 
 /** 
  * compact HCI Command packet description
@@ -40,6 +88,7 @@
 uint16_t hci_create_cmd(uint8_t *hci_cmd_buffer, hci_cmd_t *cmd, ...);
 uint16_t hci_create_cmd_internal(uint8_t *hci_cmd_buffer, hci_cmd_t *cmd, va_list argptr);
 
+
 // HCI Commands - see hci_cmds.c for info on parameters
 extern hci_cmd_t hci_inquiry;
 extern hci_cmd_t hci_inquiry_cancel;
diff --git a/src/utils.c b/src/utils.c
new file mode 100644
index 000000000..1eb30d36a
--- /dev/null
+++ b/src/utils.c
@@ -0,0 +1,39 @@
+/*
+ *  utils.c
+ *
+ *  General utility functions
+ *
+ *  Created by Matthias Ringwald on 7/23/09.
+ */
+
+#include "utils.h"
+#include <stdio.h>
+
+void bt_store_16(uint8_t *buffer, uint16_t pos, uint16_t value){
+    buffer[pos++] = value;
+    buffer[pos++] = value >> 8;
+}
+
+void bt_store_32(uint8_t *buffer, uint16_t pos, uint32_t value){
+    buffer[pos++] = value;
+    buffer[pos++] = value >> 8;
+    buffer[pos++] = value >> 16;
+    buffer[pos++] = value >> 24;
+}
+
+void bt_flip_addr(bd_addr_t dest, bd_addr_t src){
+    dest[0] = src[5];
+    dest[1] = src[4];
+    dest[2] = src[3];
+    dest[3] = src[2];
+    dest[4] = src[1];
+    dest[5] = src[0];
+}
+
+void hexdump(void *data, int size){
+    int i;
+    for (i=0; i<size;i++){
+        printf("%02X ", ((uint8_t *)data)[i]);
+    }
+    printf("\n");
+}
diff --git a/src/utils.h b/src/utils.h
new file mode 100644
index 000000000..5447c4b10
--- /dev/null
+++ b/src/utils.h
@@ -0,0 +1,39 @@
+/*
+ *  utils.h
+ *
+ *  General utility functions
+ *
+ *  Created by Matthias Ringwald on 7/23/09.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+/**
+ * @brief hci connection handle type
+ */
+typedef uint16_t hci_con_handle_t;
+
+/**
+ * @brief Length of a bluetooth device address.
+ */
+#define BD_ADDR_LEN 6
+typedef uint8_t bd_addr_t[BD_ADDR_LEN];
+
+/**
+ * @brief The link key type
+ */
+#define LINK_KEY_LEN 16
+typedef uint8_t link_key_t[LINK_KEY_LEN]; 
+
+// helper for BT little endian format
+#define READ_BT_16( buffer, pos) ( ((uint16_t) buffer[pos]) | (((uint16_t)buffer[pos+1]) << 8))
+#define READ_BT_24( buffer, pos) ( ((uint32_t) buffer[pos]) | (((uint32_t)buffer[pos+1]) << 8) | (((uint32_t)buffer[pos+2]) << 16))
+#define READ_BT_32( buffer, pos) ( ((uint32_t) buffer[pos]) | (((uint32_t)buffer[pos+1]) << 8) | (((uint32_t)buffer[pos+2]) << 16) | (((uint32_t) buffer[pos+3])) << 24)
+
+void bt_store_16(uint8_t *buffer, uint16_t pos, uint16_t value);
+void bt_store_32(uint8_t *buffer, uint16_t pos, uint32_t value);
+void bt_flip_addr(bd_addr_t dest, bd_addr_t src);
+
+void hexdump(void *data, int size);