diff --git a/mkapp/app/script/update_goggle.sh b/mkapp/app/script/update_goggle.sh
index ee98c634..196a2833 100755
--- a/mkapp/app/script/update_goggle.sh
+++ b/mkapp/app/script/update_goggle.sh
@@ -3,56 +3,87 @@
 GOGGLE_BIN="$1"
 TMP_DIR=/tmp/goggle_update
 
-gpio_export()
+function gpio_export()
 {
 	if [ ! -f /sys/class/gpio/gpio224/direction ]
 	then
 	      echo "224">/sys/class/gpio/export
-	      echo "out">/sys/class/gpio/gpio224/direction
 	fi
-
+	echo "out">/sys/class/gpio/gpio224/direction
 	if [ ! -f /sys/class/gpio/gpio228/direction ]
 	then
 		echo "228">/sys/class/gpio/export
-        	echo "out">/sys/class/gpio/gpio228/direction
 	fi
-
+        echo "out">/sys/class/gpio/gpio228/direction
 	if [ ! -f /sys/class/gpio/gpio258/direction ]
 	then
 		echo "258">/sys/class/gpio/export
-	        echo "out">/sys/class/gpio/gpio258/direction
 	fi
+	echo "out">/sys/class/gpio/gpio258/direction
+	if [ ! -f /sys/class/gpio/gpio131/direction ] 
+        then                                                          
+                echo "131">/sys/class/gpio/export
+        fi
+        echo "out">/sys/class/gpio/gpio131/direction
+}
+
+function beep_success()
+{
+    	echo "1">/sys/class/gpio/gpio131/value
+		sleep 0.1
+    	echo "0">/sys/class/gpio/gpio131/value
+		sleep 0.5
+    	echo "1">/sys/class/gpio/gpio131/value
+		sleep 0.05
+    	echo "0">/sys/class/gpio/gpio131/value
 }
 
-gpio_set_reset()
+
+function beep_failure()
+{
+    	echo "1">/sys/class/gpio/gpio131/value
+		sleep 1
+    	echo "0">/sys/class/gpio/gpio131/value
+		sleep 0.5
+    	echo "1">/sys/class/gpio/gpio131/value
+		sleep 1
+    	echo "0">/sys/class/gpio/gpio131/value
+		sleep 0.5
+    	echo "1">/sys/class/gpio/gpio131/value
+		sleep 0.05
+    	echo "0">/sys/class/gpio/gpio131/value
+}
+
+
+function gpio_set_reset()
 {
         echo "0">/sys/class/gpio/gpio224/value
         echo "1">/sys/class/gpio/gpio228/value
 }
 
-gpio_clear_reset()
+function gpio_clear_reset()
 {
         echo "1">/sys/class/gpio/gpio224/value
         echo "0">/sys/class/gpio/gpio228/value
 }
 
-gpio_set_send()
+function gpio_set_send()
 {
         echo "1">/sys/class/gpio/gpio224/value
         echo "0">/sys/class/gpio/gpio228/value
 }
 
-disconnect_fpga_flash()
+function disconnect_fpga_flash()
 {
         echo "1">/sys/class/gpio/gpio258/value
 }
 
-connect_fpga_flash()
+function connect_fpga_flash()
 {
         echo "0">/sys/class/gpio/gpio258/value
 }
 
-untar_file()
+function untar_file()
 {
 	FILE_TARGET="$1"
 
@@ -68,27 +99,45 @@ untar_file()
 	mv ${TMP_DIR}/HDZGOGGLE_RX*.bin ${TMP_DIR}/HDZGOGGLE_RX.bin
 	mv ${TMP_DIR}/HDZGOGGLE_VA*.bin ${TMP_DIR}/HDZGOGGLE_VA.bin
 }
+ 
+# eg: check_mtd_write /dev/mtdX check-size erase-size file-size bin-file
+function check_mtd_write()
+{
+	mtd_info=`mtd_debug info $1`
+	echo "$mtd_info"
+	value=`echo "$mtd_info" | grep mtd.size | grep "($2)"`                
+	if [ ! -z "$value" ];then
+	    echo "$1 size is ($2)" 
+		mtd_debug erase $1 0 $3
+		mtd_debug write $1 0 $4 $5
+		beep_success
+	else
+	    echo "$1 size is NOT ($2) !" 
+		beep_failure
+	fi
+}
 
-update_rx()
+function update_rx()
 {
 	echo "find RX update file, start update"
 	filesize=`ls -l ${TMP_DIR}/HDZGOGGLE_RX*.bin| awk '{print $5}'`
 	gpio_export
 	gpio_set_reset
 	insmod /mnt/app/ko/w25q128.ko
-
-	mtd_debug erase /dev/mtd8 0 65536
-	mtd_debug write /dev/mtd8 0 $filesize ${TMP_DIR}/HDZGOGGLE_RX.bin
-	mtd_debug erase /dev/mtd9 0 65536
-	mtd_debug write /dev/mtd9 0 $filesize ${TMP_DIR}/HDZGOGGLE_RX.bin
-
+	check_mtd_write /dev/mtd8 1M 65536 $filesize ${TMP_DIR}/HDZGOGGLE_RX.bin
+    echo "5"                                                                          
+    echo "5" > /tmp/progress_goggle
+	sleep 1
+	check_mtd_write /dev/mtd9 1M 65536 $filesize ${TMP_DIR}/HDZGOGGLE_RX.bin
+    echo "10"                                                                          
+    echo "10" > /tmp/progress_goggle
 	echo "update finish RX, running"
 	gpio_clear_reset
 	sleep 1
 	rmmod /mnt/app/ko/w25q128.ko
 }
 
-update_fpga()
+function update_fpga()
 {
 	echo "find VA update file, start update"
 	filesize2=`ls -l ${TMP_DIR}/HDZGOGGLE_VA*.bin| awk '{print $5}'`
@@ -96,9 +145,9 @@ update_fpga()
 	gpio_set_reset
 	disconnect_fpga_flash
 	insmod /mnt/app/ko/w25q128.ko
-
-	mtd_debug erase /dev/mtd10 0 16777216
-	mtd_debug write /dev/mtd10 0 $filesize2 ${TMP_DIR}/HDZGOGGLE_VA.bin
+	check_mtd_write /dev/mtd10 16M 16777216 $filesize2 ${TMP_DIR}/HDZGOGGLE_VA.bin
+    echo "45"                                                                         
+    echo "45" > /tmp/progress_goggle  
 	echo "update finish VA, running"
 	gpio_clear_reset
 	sleep 1
@@ -123,12 +172,8 @@ then
 	cp -f /mnt/app/setting.ini /mnt/UDISK/
 	#disable it66021
 	i2cset -y 3 0x49 0x10 0xff
-	update_rx
-	echo "1"
-	echo "1" > /tmp/progress_goggle
+        update_rx
 	update_fpga
-	echo "45"
-	echo "45" > /tmp/progress_goggle
 	hdz_upgrade_app.sh
 	echo "100"
 	echo "100" > /tmp/progress_goggle
@@ -141,4 +186,3 @@ else
 		echo "repeat"
 	fi
 fi
-
diff --git a/mkapp/app/script/write_flashes.sh b/mkapp/app/script/write_flashes.sh
index b337cf9f..da4d41ef 100755
--- a/mkapp/app/script/write_flashes.sh
+++ b/mkapp/app/script/write_flashes.sh
@@ -1,15 +1,34 @@
 #!/bin/sh
 
+VAbin=/mnt/extsd/HDZGOGGLE_VA.bin
+VAcount=1
+VAwrites=0
+RXbin=/mnt/extsd/HDZGOGGLE_RX.bin
+RXcount=2
+RXwrites=0
+
 function gpio_export()
 {
-        echo "224">/sys/class/gpio/export
-        echo "228">/sys/class/gpio/export
-        echo "131">/sys/class/gpio/export
-        echo "258">/sys/class/gpio/export
-        echo "out">/sys/class/gpio/gpio224/direction
+	if [ ! -f /sys/class/gpio/gpio224/direction ]
+	then
+	      echo "224">/sys/class/gpio/export
+	fi
+	echo "out">/sys/class/gpio/gpio224/direction
+	if [ ! -f /sys/class/gpio/gpio228/direction ]
+	then
+		echo "228">/sys/class/gpio/export
+	fi
         echo "out">/sys/class/gpio/gpio228/direction
+	if [ ! -f /sys/class/gpio/gpio258/direction ]
+	then
+		echo "258">/sys/class/gpio/export
+	fi
+	echo "out">/sys/class/gpio/gpio258/direction
+	if [ ! -f /sys/class/gpio/gpio131/direction ] 
+        then                                                          
+                echo "131">/sys/class/gpio/export
+        fi
         echo "out">/sys/class/gpio/gpio131/direction
-        echo "out">/sys/class/gpio/gpio258/direction
 }
 
 function beep_on()
@@ -29,6 +48,34 @@ function beep()
         echo "0">/sys/class/gpio/gpio131/value
 }
 
+function beep_success()
+{
+    echo "1">/sys/class/gpio/gpio131/value
+		sleep 0.1
+    echo "0">/sys/class/gpio/gpio131/value
+		sleep 0.5
+    echo "1">/sys/class/gpio/gpio131/value
+		sleep 0.05
+    echo "0">/sys/class/gpio/gpio131/value
+}
+
+
+function beep_failure()
+{
+    echo "1">/sys/class/gpio/gpio131/value
+		sleep 1
+    echo "0">/sys/class/gpio/gpio131/value
+		sleep 0.5
+    echo "1">/sys/class/gpio/gpio131/value
+		sleep 1
+    echo "0">/sys/class/gpio/gpio131/value
+		sleep 0.5
+    echo "1">/sys/class/gpio/gpio131/value
+		sleep 0.05
+    echo "0">/sys/class/gpio/gpio131/value
+}
+
+
 function disconnect_fpga_flash()
 {
         echo "1">/sys/class/gpio/gpio258/value
@@ -58,13 +105,40 @@ function gpio_set_send()
         echo "0">/sys/class/gpio/gpio228/value
 }
 
+# eg: check_mtd_write /dev/mtdX check-size erase-size file-size bin-file
+function check_mtd_write()
+{
+	mtd_info=`mtd_debug info $1`
+	echo "$mtd_info"
+	value=`echo "$mtd_info" | grep mtd.size | grep "($2)"`                
+	if [ ! -z "$value" ];then
+	        echo "$1 size is ($2)" 
+		mtd_debug erase $1 0 $3
+		mtd_debug write $1 0 $4 $5
+		if [ $? == 0 ]; then
+			beep_success
+			if [ "$5" == "$VAbin" ]; then
+				VAwrites=$((VAwrites + 1))
+			fi
+			if [ "$5" == "$RXbin" ]; then
+				RXwrites=$((RXwrites + 1))
+			fi
+		fi 
+	else
+	        echo "$1 size is NOT ($2) !" 
+		beep_failure
+	fi
+}
+
+
+
 
 echo "<<<<-------------------------------------------------------------------->>>>"
 
-if [ -e /mnt/extsd/HDZGOGGLE_VA.bin ]
+if [ -e $VAbin ]
 then
     echo "find VA update file, start update"
-        filesize2=`ls -l /mnt/extsd/HDZGOGGLE_VA.bin| awk '{print $5}'`
+        filesize2=`ls -l $VAbin| awk '{print $5}'`
     gpio_export
     gpio_set_reset
     disconnect_fpga_flash
@@ -73,67 +147,56 @@ then
 
 
 		touch /tmp/update.ing
-        mtd_debug erase /dev/mtd10 0 16777216
-        mtd_debug write /dev/mtd10 0 $filesize2 /mnt/extsd/HDZGOGGLE_VA.bin
+    # normally the VA is mounted at /dev/mtd10 
+    #	check_mtd_write /dev/mtd8 16M 16777216 $filesize2 $VAbin
+    #	check_mtd_write /dev/mtd9 16M 16777216 $filesize2 $VAbin
+	  check_mtd_write /dev/mtd10 16M 16777216 $filesize2 $VAbin
 		rm /tmp/update.ing -rf
 
-		if [ ! -f /mnt/extsd/DONOTREMOVE.txt ]
-		then
-			rm /mnt/extsd/HDZGOGGLE_VA.bin -rf
+		if [ "$VAwrites" == "$VAcount" ]; then
+			if [ ! -f /mnt/extsd/DONOTREMOVE.txt ]
+			then
+				rm $VAbin -rf
+			fi
 		fi
 
-    echo "update finish VA, running"
+    echo "update finish $VAwrites VA, running"
     gpio_clear_reset
 	  sleep 1
     rmmod /mnt/app/ko/w25q128.ko
 else
-    echo "no update file,skip"
+    echo "no VA update file,skip" 
 fi
 
 
-if [ -e /mnt/extsd/HDZGOGGLE_RX.bin ]
+if [ -e $RXbin ]
 then
     echo "find RX update file, start update"
-        filesize=`ls -l /mnt/extsd/HDZGOGGLE_RX.bin| awk '{print $5}'`
+        filesize=`ls -l $RXbin| awk '{print $5}'`
     gpio_export
     gpio_set_reset
 		sleep 1
     insmod /mnt/app/ko/w25q128.ko
-
-    valude=`mtd_debug info /dev/mtd8 | grep mtd.size | grep 1M`                
-    if [ "$valude" = "" ];then                                     
-			beep_on
-			usleep 500
-			beep_off
-			exit 0
-		fi
-    
-    valude=`mtd_debug info /dev/mtd9 | grep mtd.size | grep 1M`                
-    if [ "$valude" = "" ];then                                     
-			beep_on
-			usleep 500
-			beep_off
-			exit 0
-		fi
-
-    mtd_debug erase /dev/mtd8 0 65536
-        mtd_debug write /dev/mtd8 0 $filesize /mnt/extsd/HDZGOGGLE_RX.bin
-    mtd_debug erase /dev/mtd9 0 65536
-        mtd_debug write /dev/mtd9 0 $filesize /mnt/extsd/HDZGOGGLE_RX.bin
-
-		if [ ! -f /mnt/extsd/DONOTREMOVE.txt ]
-		then
-			rm /mnt/extsd/HDZGOGGLE_RX.bin -rf
+    # normally the RX modules are mounted at /dev/mtd8 and /dev/mtd9
+	  check_mtd_write /dev/mtd8 1M 65536 $filesize $RXbin
+	  check_mtd_write /dev/mtd9 1M 65536 $filesize $RXbin
+    #	check_mtd_write /dev/mtd10 1M 65536 $filesize $RXbin
+
+		if [ "$RXwrites" == "$RXcount" ]; then
+			if [ ! -f /mnt/extsd/DONOTREMOVE.txt ]
+			then
+				rm $RXbin -rf
+			fi
 		fi
 
-    echo "update finish RX, running"
+    echo "update finish $RXwrites RX, running"
     gpio_clear_reset
 		sleep 1
     rmmod /mnt/app/ko/w25q128.ko
 		
 		beep
 else
-    echo "no update file,skip"
+    echo "no RX update file,skip"
 fi
 
 echo "<<<<-------------------------------------------------------------------->>>>"