diff --git a/config/sources/families/spacemit.conf b/config/sources/families/spacemit.conf
index aa89b586f4..15a41af5c9 100644
--- a/config/sources/families/spacemit.conf
+++ b/config/sources/families/spacemit.conf
@@ -55,22 +55,34 @@ pre_prepare_partitions() {
 }
 
 write_uboot_platform() {
-	local device=${2}
+	local device N
+
+	declare -A d
+	d=(
+		["bootinfo_emmc.bin"]="0:$(du -b ${1}/bootinfo_emmc.bin | awk '{print $1}')"
+		["FSBL.bin"]="1:$(du -b ${1}/FSBL.bin | awk '{print $1}')"
+		["fw_dynamic.itb"]="1280:$(du -b ${1}/fw_dynamic.itb | awk '{print $1}')"
+		["u-boot.itb"]="2048:$(du -b ${1}/u-boot.itb | awk '{print $1}')"
+	)
+
+	device=${2}
 	if [ -b ${2}boot0 ]; then
-		echo "eMMC"
-		DEVICE=`ls /dev/mmcblk*boot0 | sed 's/^.....//'`
-		echo 0 > /sys/block/${DEVICE}/force_ro
-		sleep .50
-		dd if="$1/bootinfo_emmc.bin" of="/dev/${DEVICE}" bs=512 conv=notrunc
-		dd if="$1/FSBL.bin" of="/dev/${DEVICE}" bs=512 seek=1 conv=notrunc
-		dd if="$1/FSBL.bin" of="/dev/${DEVICE}" bs=512 seek=512 conv=notrunc
-	else
-		echo "SD card"
-		dd if="$1/bootinfo_emmc.bin" of=$2 bs=512 conv=notrunc
-		dd if="$1/FSBL.bin" of="$2" bs=512 seek=1 conv=notrunc
-		dd if="$1/FSBL.bin" of="$2" bs=512 seek=512 conv=notrunc
+		device=${2}boot0
+		echo 0 > /sys/block/$(basename ${device})/force_ro
+		sync
 	fi
-	dd if="$1/fw_dynamic.itb" of="$2" bs=512 seek=1280 conv=notrunc
-	dd if="$1/u-boot.itb" of="$2" bs=512 seek=2048 conv=notrunc
-	sync
+
+	for f in "${!d[@]}"; do
+
+		N=$((${d[$f]%:*} * 512))
+		if dd "if=${device}" bs=1 "skip=$N" "count=${d[$f]#*:}" \
+			conv=notrunc status=noxfer 2> /dev/null | cmp --quiet "${1}/${f}"; then
+
+			echo "Skip  $f, it is equal to the existing one"
+		else
+			echo "# Write $f to ${device}"
+			dd "if=${1}/${f}" "of=${device}" bs=512 "seek=${d[$f]%:*}" conv=notrunc,fsync status=noxfer
+		fi
+	done
+
 }