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@@ -39,3 +39,123 @@ use.
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reset the board::
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=> reset
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+
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+
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+Updating U-Boot using xFSTK
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+---------------------------
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+
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+You can also update U-Boot using the xfstk-dldr-solo tool if you can build it.
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+One way to do that is to follow the `xFSTK`_ instructions. You may need to use
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+a virtual machine running Ubuntu Trusty. Once you have built it and installed
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+libboost-all-dev, you can copy xfstk-dldr-solo to /usr/local/bin and
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+libboost_program_options.so.1.54.0 to /usr/lib/i386-linux-gnu/ and with luck
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+it will work. You might fine this `drive`_ helpful.
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+
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+If it does, then you can download and unpack the Edison reocovery image,
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+install dfu-util, reset your board and flash U-Boot like this::
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+
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+ $ xfstk-dldr-solo --gpflags 0x80000007 \
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+ --osimage u-boot-edison.img \
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+ --fwdnx recover/edison_dnx_fwr.bin \
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+ --fwimage recover/edison_ifwi-dbg-00.bin \
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+ --osdnx recover/edison_dnx_osr.bin
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+
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+This should show the following
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+
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+.. code-block:: none
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+
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+ XFSTK Downloader Solo 0.0.0
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+ Copyright (c) 2015 Intel Corporation
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+ Build date and time: Aug 15 2020 15:07:13
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+
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+ .Intel SoC Device Detection Found
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+ Parsing Commandline....
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+ Registering Status Callback....
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+ .Initiating Download Process....
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+ .......(lots of dots)........XFSTK-STATUS--Reconnecting to device - Attempt #1
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+ .......(even more dots)......................
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+
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+
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+You have about 10 seconds after resetting the board to type the above command.
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+If you want to check if the board is ready, type:
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+
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+.. code-block:: none
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+
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+ lsusb |egrep "8087|8086"
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+ Bus 001 Device 004: ID 8086:e005 Intel Corp.
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+
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+If you see a device with the same ID as above, the board is waiting for your
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+command.
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+
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+After about 5 seconds you should see some console output from the board:
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+
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+.. code-block:: none
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+
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+ ******************************
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+ PSH KERNEL VERSION: b0182b2b
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+ WR: 20104000
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+ ******************************
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+
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+ SCU IPC: 0x800000d0 0xfffce92c
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+
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+ PSH miaHOB version: TNG.B0.VVBD.0000000c
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+
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+ microkernel built 11:24:08 Feb 5 2015
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+
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+ ******* PSH loader *******
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+ PCM page cache size = 192 KB
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+ Cache Constraint = 0 Pages
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+ Arming IPC driver ..
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+ Adding page store pool ..
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+ PagestoreAddr(IMR Start Address) = 0x04899000
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+ pageStoreSize(IMR Size) = 0x00080000
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+
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+ *** Ready to receive application ***
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+
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+ After another 10 seconds the xFSTK tool completes and the board resets. About
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+ 10 seconds after that should see the above message again and then within a
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+ few seconds U-Boot should start on your board:
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+
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+.. code-block:: none
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+
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+ U-Boot 2020.10-rc3 (Sep 03 2020 - 18:44:28 -0600)
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+
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+ CPU: Genuine Intel(R) CPU 4000 @ 500MHz
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+ DRAM: 980.6 MiB
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+ WDT: Started with servicing (60s timeout)
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+ MMC: mmc@ff3fc000: 0, mmc@ff3fa000: 1
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+ Loading Environment from MMC... OK
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+ In: serial
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+ Out: serial
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+ Err: serial
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+ Saving Environment to MMC... Writing to redundant MMC(0)... OK
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+ Saving Environment to MMC... Writing to MMC(0)... OK
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+ Net: No ethernet found.
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+ Hit any key to stop autoboot: 0
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+ Target:blank
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+ Partitioning using GPT
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+ Writing GPT: success!
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+ Saving Environment to MMC... Writing to redundant MMC(0)... OK
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+ Flashing already done...
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+ 5442816 bytes read in 238 ms (21.8 MiB/s)
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+ Valid Boot Flag
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+ Setup Size = 0x00003c00
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+ Magic signature found
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+ Using boot protocol version 2.0c
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+ Linux kernel version 3.10.17-poky-edison+ (ferry@kalamata) #1 SMP PREEMPT Mon Jan 11 14:54:18 CET 2016
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+ Building boot_params at 0x00090000
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+ Loading bzImage at address 100000 (5427456 bytes)
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+ Magic signature found
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+ Kernel command line: "rootwait root=PARTUUID=ada722ed-6410-764e-8619-abff6f66e10e rootfstype=ext4 console=ttyMFD2 earlyprintk=ttyMFD2,keep loglevel=4 g_multi.ethernet_config=cdc systemd.unit=multi-user.target hardware_id=00 g_multi.iSerialNumber=2249baf774c675598661a63098c0ad41 g_multi.dev_addr=02:00:86:c0:ad:41 platform_mrfld_audio.audio_codec=dummy"
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+ Magic signature found
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+
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+ Starting kernel ...
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+
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+ ...
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+
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+ Poky (Yocto Project Reference Distro) 1.7.2 edison ttyMFD2
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+
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+ edison login:
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+
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+.. _xFSTK: https://community.intel.com/t5/Intel-Makers/Building-xFSTK-on-Ubuntu-14-04-32-bit-for-flashing-Edison/td-p/538081
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+.. _drive: https://drive.google.com/drive/u/0/folders/1URPHrOk9-UBsh8hjv-7WwC0W6Fy61uAJ
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