diff --git a/dpcmd.h b/dpcmd.h
index 745ed7f..7b0da1a 100644
--- a/dpcmd.h
+++ b/dpcmd.h
@@ -78,8 +78,5 @@ bool Wait(const char* strOK,const char* strFail);
 void ExitProgram(void);
 int FirmwareUpdate();
 void sin_handler(int sig);
-int ctrlCCount;
-long int tvSec;
-long int tvUsec;
 
 #endif
diff --git a/usbdriver.c b/usbdriver.c
index 69d0fe2..e1f6f9c 100644
--- a/usbdriver.c
+++ b/usbdriver.c
@@ -17,8 +17,11 @@ extern bool isSendFFsequence;
 #define SerialFlash_FALSE   -1
 #define SerialFlash_TRUE    1
 
+static int dev_index;
+static usb_device_entry_t   usb_device_entry[MAX_Dev_Index];
 static usb_dev_handle *dediprog_handle[MAX_Dev_Index];
 
+
 bool Is_NewUSBCommand(int Index)
 {
     if(is_SF100nBoardVersionGreaterThan_5_5_0(Index) || is_SF600nBoardVersionGreaterThan_6_9_0(Index))
diff --git a/usbdriver.h b/usbdriver.h
index 7131617..91f7a4a 100644
--- a/usbdriver.h
+++ b/usbdriver.h
@@ -44,8 +44,6 @@ typedef struct {
     unsigned long Length;
 } CNTRPIPE_RQ, *PCNTRPIPE_RQ;
 
-usb_device_entry_t   usb_device_entry[MAX_Dev_Index];
-
 /* Set/clear LEDs on dediprog */
 #define PASS_ON		(0 << 0)
 #define PASS_OFF	(1 << 0)
@@ -54,7 +52,6 @@ usb_device_entry_t   usb_device_entry[MAX_Dev_Index];
 #define ERROR_ON	(0 << 2)
 #define ERROR_OFF	(1 << 2)
 
-int dev_index;
 int usb_driver_init(void); 
 int get_usb_dev_cnt(void);
 int usb_driver_release(void);