i.mx7 自动烧录sdcard / i.mx7 autoflash sdcard

IMAGE_INSTALL_append = " parted"

#!/bin/sh

if [ `expr 0 + 0${1}` -le 0 ]; then
        echo "usage $0: <sd_size in gb>"
        exit 1;
fi

# base config
DEST=/dev/mmcblk2
DESTP=${DEST}p
MNTPOINT=/mnt/sd
DEST_SIZE=`expr ${1} \* 900 \* 1024`
# images
BASE_DIR=/home/root/images														# 镜像目录
UBOOT=${BASE_DIR}/u-boot.imx													# uboot						
ZIMAGE=${BASE_DIR}/zImage-imx7d-phyboard-zeta-001.bin							# kernel
OFTREE=${BASE_DIR}/zImage-imx7d-phyboard-zeta-001.dtb							# oftree
ROOTFS=${BASE_DIR}/fsl-image-validation-imx-imx7d-phyboard-zeta-001.tar.bz2		# rootfs
# size
BOOT_SPACE_ALIGNED=$(expr 8192 + 4096 - 1)
BOOT_SPACE_ALIGNED=$(expr ${BOOT_SPACE_ALIGNED} - ${BOOT_SPACE_ALIGNED} % 4096)

# set LED D12 blink 5 times 													# 烧写指示LED, 可更换为其他GPIO
echo 12 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio12/direction
for i in 1 2 3 4 5
do
        echo 1 > /sys/class/gpio/gpio12/value
        sleep 0.5
        echo 0 > /sys/class/gpio/gpio12/value
        sleep 0.5
done

# start
rm -rf ${MNTPOINT}
mkdir -p ${MNTPOINT}
umount ${DESTP}*

echo Wipe emmc device
dd if=/dev/zero of=${DEST} bs=1024 count=0 seek=${DEST_SIZE}
dd if=/dev/zero of=${DEST} bs=512k count=32 conv=fsync

echo Create Partitions
sfdisk -u S ${DEST} << EOF
  1 : start=8192,size=$(expr 2 \* ${BOOT_SPACE_ALIGNED}),Id=c
  2 : start=$(expr 2 \* 4096 + 2 \* ${BOOT_SPACE_ALIGNED}),Id=83
EOF

echo Flash Uboot
dd if=${UBOOT} of=${DEST} conv=notrunc seek=2 bs=512

echo Flash Kernel/Devicetree
yes | mkfs.vfat ${DESTP}1
mount ${DESTP}1 ${MNTPOINT}
cp ${ZIMAGE} ${MNTPOINT}/zImage
cp ${OFTREE} ${MNTPOINT}/oftree
umount ${MNTPOINT}

echo Flash ROOTFS
yes | mkfs.ext4 ${DESTP}2
mount ${DESTP}2 ${MNTPOINT}
tar xmf ${ROOTFS} -C ${MNTPOINT}
umount ${MNTPOINT}

#LED D12 on
echo 1 > /sys/class/gpio/gpio12/value

./flash_emmc.sh 4						# 参数值为emmc的大小

[Unit]
Description=Flash Emmc Service

[Service]
Type=simple
ExecStart=/home/root/images/flash_emmc.sh 4
SuccessExitStatus=2

[Install]
WantedBy=multi-user.target

systemctl start flash-emmc.service