Using setup_sdcard.sh with custom pre-built bootloader

[Arthur Perry]

Hello,

I have a question about the use of setup_sdcard.sh when producing 1GB images on the local filesystem and sourcing pre-built bootloader files for this image.

When used in a fashion such as this:

setup_sdcard.sh --dtb beaglebone --boot_label BEAGLEBONE --rootfs_label THIS_LABEL --bbb-flasher --img-1gb omap-minimal-armhf.img --spl custom_MLO --bootloader custom_u-boot-am335x_evm.img

we get an error when dd is called about here:

+ case "${bootloader_location}" in

+ echo 'Using dd to place bootloader on drive'

Using dd to place bootloader on drive

+ echo -----------------------------

-----------------------------

+ '[' x = xenable ']'

+ '[' x = xenable ']'

+ dd_spl_uboot_boot

+ unset dd_spl_uboot

+ '[' '!' x2 = x ']'

+ dd_spl_uboot='count=2 '

+ '[' '!' x1 = x ']'

+ dd_spl_uboot='count=2 seek=1 '

+ '[' xenable = xenable ']'

+ dd_spl_uboot='count=2 seek=1 conv=notrunc '

+ '[' '!' x128k = x ']'

+ dd_spl_uboot='count=2 seek=1 conv=notrunc bs=128k'

+ '[' xenable = xenable ']'

+ spl_uboot_blob=

+ echo 'MLO: dd if= of=omap-minimal-armhf.img count=2 seek=1 conv=notrunc bs=128k'

MLO: dd if= of=omap-minimal-armhf.img count=2 seek=1 conv=notrunc bs=128k

+ echo -----------------------------

-----------------------------

+ dd if=/tmp/tmp.DLk52EpElz/dl/ of=omap-minimal-armhf.img count=2 seek=1 conv=notrunc bs=128k

dd: error reading '/tmp/tmp.DLk52EpElz/dl/': Is a directory

0+0 records in

0+0 records out

0 bytes copied, 0.000236716 s, 0.0 kB/s

So in order for this to work as instantiated above and have the variables populated for dd at this point, I have to make these modifications to the script:

diff --git a/omap-image-builder/tools/setup_sdcard.sh b/omap-image-builder/tools/setup_sdcard.sh

index a86e700e..80355850 100755

--- a/omap-image-builder/tools/setup_sdcard.sh

+++ b/omap-image-builder/tools/setup_sdcard.sh

@@ -1936,11 +1936,15 @@ while [ ! -z "$1" ] ; do

        --spl)

                checkparm $2

                LOCAL_SPL="$2"

+               SPL="${LOCAL_SPL##*/}"

+               blank_SPL="${SPL}"

                USE_LOCAL_BOOT=1

                ;;

        --bootloader)

                checkparm $2

                LOCAL_BOOTLOADER="$2"

+               UBOOT="${LOCAL_BOOTLOADER##*/}"

+               blank_UBOOT="${UBOOT}"

                USE_LOCAL_BOOT=1

                ;;

        --use-beta-bootloader)

-- 

2.17.1

Should I be using this script differently in order to source external pre-built bootloader files? Perhaps this is a not-so-common use case?

Thanks,

Art

[Robert Nelson]

Thanks for testing! It's been awhile since i exercised that section of
the script.. Merged:
https://github.com/RobertCNelson/omap-image-builder/commit/5ecd35b1d4ef2d000dcbbacb63a29dfc45742811

Regards,

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--
Robert Nelson
https://rcn-ee.com/