On Wednesday, July 17, 2019 at 5:06:32 PM UTC-7, RobertCNelson wrote:
>
> On Wed, Jul 17, 2019 at 5:24 PM Hartley Sweeten <[email protected]
> <javascript:>> wrote:
> >
> > Hello all,
> >
> > Has the Board ID EEPROM contents changed from what is shown in the
> System Reference Manual?
> >
> > I just got some new BeagleBone Black boards from Mouser. I put an image
> of what I have been using on them and when they boot I see this:
> >
> > U-Boot 2018.01-00002-g9aa111a004 (Jan 20 2018 - 12:45:29 -0600), Build:
> jenkins-github_Bootloader-Builder-32
> >
> > CPU : AM335X-GP rev 2.1
> > I2C: ready
> > DRAM: 512 MiB
> > No match for driver 'omap_hsmmc'
> > No match for driver 'omap_hsmmc'
> > Some drivers were not found
> > Reset Source: Power-on reset has occurred.
> > MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
> > Using default environment
> >
> > Board: BeagleBone Black
> > <ethaddr> not set. Validating first E-fuse MAC
> > BeagleBone Black:
> > Model: SeeedStudio BeagleBone Green:
> > BeagleBone: cape eeprom: i2c_probe: 0x54:
> > BeagleBone: cape eeprom: i2c_probe: 0x55:
> > BeagleBone: cape eeprom: i2c_probe: 0x56:
> > BeagleBone: cape eeprom: i2c_probe: 0x57:
> > Net: eth0: MII MODE
> > cpsw, usb_ether
> > Press SPACE to abort autoboot in 2 seconds
> >
> > For some reason U-Boot thinks the model is a SeeedStudio BeagleBone
> Green.
> >
> > I then checked the eeprom:
> >
> > => run eeprom_dump
> > Setting bus to 0
> > 0000: aa 55 33 ee 41 33 33 35 42 4e 4c 54 42 42 47 31
> .U3.A335BNLTBBG1
> > 0010: 34 30 31 00 02 00 00 00 08 51 0d 00 ff ff ff ff
> 401......Q......
> >
> > This doesn't look like what is shown in the System Reference Manual.
> >
> > Has the EEPROM format changed?
>
> Nope, a few BBB's escaped GHI with a bad eeprom programmed..
>
>
> GND TP4 (between Ethernet and barrel plug) then run this "one" command as
> root:
>
> *****
> dd if=/opt/scripts/device/bone/bbb-eeprom.dump
> of=/sys/devices/platform/ocp/44e0b000.i2c/i2c-0/0-0050/eeprom
> *****
> ^ This line will get word-wrapped by gmail/googlegroups,etc
>
> Regards,
>
Hi Robert,
I was able to reprogram the boards and they appear to work ok now.
BTW, I'm doing this with an older Debian 7.11 image on the boards. This
image has an older kernel so I had to change the 'dd' command a bit. I
created a script to do it that also allows me to "fix" the serial number
part in the EEPROM.
$ cat /etc/dogtag
BeagleBoard.org Debian Image 2016-06-15
$ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 7.11 (wheezy)
Release: 7.11
Codename: wheezy
$ uname -a
Linux beaglebone 3.8.13-bone80 #1 SMP Wed Jun 15 17:03:55 UTC 2016 armv7l
GNU/Linux
$ cat fix_eeprom.sh
#!/bin/bash
# Fix the board ID EEPROM
#EEPROM_FILE=/opt/scripts/device/bone/bbb-eeprom.dump
EEPROM_FILE=/tmp/eeprom.tmp
EEPROM=/sys/class/i2c-dev/i2c-0/device/0-0050/eeprom
echo
echo "EEPROM is currently:"
sudo hd -v -n 64 ${EEPROM}
if [ -n "$1" ]; then
echo -ne "\xaa\x55\x33\xee" > ${EEPROM_FILE}
echo -n "A335BNLT" >> ${EEPROM_FILE}
echo -n $1 >> ${EEPROM_FILE}
echo
echo "Writing:"
hd ${EEPROM_FILE}
sudo dd if=${EEPROM_FILE} of=${EEPROM}
echo
echo "EEPROM is now:"
sudo hd -v -n 64 ${EEPROM}
fi;
Do you know if this is a common problem?
We have had a number of boards that we noticed the serial number did not
match the bar code on the board. Sometimes the ASCII serial number is just
short (i.e. instead of '1827BBBG1473' it will be '473' with non-ASCII data
for the last 8 bytes). Other times the entire serial number will be
non-ASCII for all 12 bytes. Those boards have booted ok so the Model number
part was probably ok but it appears that the manufacture has a issue
programming the EEPROMs correctly.
Big pointer to this issue. I used to get BeagleBone Black boards that had
'BBBK' in the serial number not they all seem to be 'BBBG'.
Ugh...
Hartley
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