Created
August 27, 2019 11:41
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OpenWrt 18.06.4 SD eMMC image for Banana Pi R2
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| #!/bin/bash | |
| # OpenWrt 18.06.4 for Banana Pi R2 | |
| # Make SD or eMMC image from official kernel and rootfs images. | |
| # Inspired by https://github.com/BPI-SINOVOIP/openwrt/commit/b4dfaeca4d33ad88364bfb7df353b3dfca2883fe | |
| set -e | |
| KIND=$1 | |
| if [[ $KIND != sd ]] && [[ $KIND != emmc ]]; then | |
| echo Usage: $0 '<sd|emmc> [outfile]' >/dev/stderr | |
| exit 2 | |
| fi | |
| OUTFILE=${2:-bpi-r2-$KIND.bin} | |
| MTKBASE=https://github.com/BPI-SINOVOIP/openwrt/raw/b4dfaeca4d33ad88364bfb7df353b3dfca2883fe/staging_dir/target-arm_cortex-a7%2Bneon-vfpv4_musl_eabi/image/ | |
| PRELOADER=mtk-bpi-r2-preloader-$KIND.bin | |
| UBOOT=mtk-bpi-r2-uboot.bin | |
| OPENWRTVER=18.06.4 | |
| OPENWRTBASE=https://downloads.openwrt.org/releases/$OPENWRTVER/targets/mediatek/mt7623/ | |
| KERNEL=openwrt-$OPENWRTVER-mediatek-mt7623-7623n-bananapi-bpi-r2-initramfs-kernel.bin | |
| ROOTFS=openwrt-$OPENWRTVER-mediatek-mt7623-7623n-bananapi-bpi-r2-squashfs-sysupgrade.bin | |
| [[ -f $PRELOADER ]] || wget $MTKBASE/$PRELOADER | |
| [[ -f $UBOOT ]] || wget $MTKBASE/$UBOOT | |
| [[ -f $KERNEL ]] || wget $OPENWRTBASE/$KERNEL | |
| [[ -f $ROOTFS ]] || wget $OPENWRTBASE/$ROOTFS | |
| rm -f $OUTFILE | |
| dd bs=1024 if=$PRELOADER of=$OUTFILE seek=0 | |
| dd bs=1024 if=$UBOOT of=$OUTFILE seek=320 | |
| dd bs=1024 if=$KERNEL of=$OUTFILE seek=2048 | |
| dd bs=1024 if=$ROOTFS of=$OUTFILE seek=67584 |
Could you please explain, howto calculate the offset for $ROOTFS?
Sadly, I don't know. It's copied from the "inspired by" commit.
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Could you please explain, howto calculate the offset for $ROOTFS? Because I created my own kernel and rootfs, I get unusable image, if I replace kernel.bin and sysupgrade.bin by my own.