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feed contact links home contact file repository login about search search archives view archives 2014 april flashing a benq z-series for free(dom) 14/04/28 2013 may january 2012 march 2009 september march 2007 december 2005 july categories tech and hacks (16) personal life (1) creative commons this work is licensed under a creative commons attribution-sharealike 3.0 license . powered by -- flashing a benq z-series for free(dom) 2014-04-28, 00:18 tech and hacks disclaimer: if you attempt to reflash your screen's firmware, there is always a chance that something goes wrong, and that you end up with a very expensive brick. as always, i cannot be held responsible in this case. note: for support, please head to the blur busters forum topic at http://forums.blurbusters.com/viewtopic ... &t=779 important note: as you can see by reading the above forum topic, people have had mixed results, depending on the hardware they used. so if the update fails the first time you attempt it, don't panic, and simply retry it using a different desktop or laptop. update (2014-05-04): a new version of the patch is available, that removes the hardcoded path and address, and has better error messages. the article has been updated. update (2014-05-07): a new version of the patch is available, that adds a "noreset" option. when set, the reset command will not be sent at the end of the read/write operation. furthermore, the reset command will also be skipped in the event an error occurred during the process. this aims to prevent bricking the screen, since the reset command seems to do more than just exit the isp mode. simply run flashrom in chip identification mode, without the reset option, after a successful flash, to exit the isp mode. i recently bought a xl2411z screen, but it turned out that blur reduction, its "key selling feature", wasn't working properly. benq then released a v2 firmware, but no instruction or tool allowing to reflash the firmware. the only available options were to buy a 50$ usb flasher, or to build a parallel port one, and use some proprietary and windows-only tool by mstar, the company that provides the chip used in these screens. mstar offers no datasheet for their products, so buying a one-time use flasher wasn't really interesting, and building yet another parallel port adapter to use a completely obscure utility wasn't really challenging (even if i had the possibility to borrow a computer with a parallel port, this isn't necessarily everyone's case nowadays). after a dozen of hours spent googling duckduckgoing, during which i could only find service manuals for mstar-equipped tvs and screens that consisted of "plug the flasher, use our windows tool", i finally found some useful information on github, thanks to the linux kernel being gpl: two different drivers for completely unrelated chips by mstar, but which seemed to use the same protocol for flashing a spi flash through i2c: https://github.com/varunchitre15/mt6589_kernel_source/blob/master/mediatek/kernel/drivers/nfc/msr3110.c and https://github.com/nikopol2013/canvas2-4.2.2/blob/master/mediatek/custom/common/kernel/touchpanel/msg2133_ps/msg2133_driver.c . i then read a bit more about ddc , the i2c based protocol allowing to exchange information between screens and computers, and i guessed that since it uses i2c, and since mstar seem to provide a way to flash spi flash chips through i2c for many of their products, there were good chances that the same protocol would also be exposed through the i2c bus used by ddc on my screen. so, i decided to scan the i2c bus. i plugged the screen to my laptop using a vga cable (so yeah, by the way, you'll need a pc or laptop running gnu/linux, probably also a second screen (or remote shell) in the case it's a pc, since the one you'll be flashing has to be in standby mode during the operation, and the driver of your graphics card or chipset must register the ddc channel as an i2c bus to the linux kernel. intel and ati hardware using the open source driver are ok, ati proprietary driver is not as it doesn't expose i2c, i don't know about nvidia open source or proprietary drivers), and ran the following commands: alex@hadaly:~$ sudo modprobe i2c-dev alex@hadaly:~$ sudo i2cdetect -l i2c-0 i2c i915 gmbus ssc i2c adapter i2c-1 i2c i915 gmbus vga i2c adapter i2c-2 i2c i915 gmbus panel i2c adapter i2c-3 i2c i915 gmbus dpc i2c adapter i2c-4 i2c i915 gmbus dpb i2c adapter i2c-5 i2c i915 gmbus dpd i2c adapter i2c-6 i2c dpddc-b i2c adapter alex@hadaly:~$ sudo i2cdetect 1 warning! this program can confuse your i2c bus, cause data loss and worse! i will probe file /dev/i2c-1. i will probe address range 0x03-0x77. continue? [y/n] 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- 37 -- -- -- -- -- -- -- -- 40: -- -- -- -- -- -- -- -- -- 49 -- -- -- -- -- -- 50: 50 -- -- -- -- -- -- -- -- 59 -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: -- -- -- -- -- -- -- -- bingo! there were 4 i2c addresses responding. 0x37 and 0x50 are the "well known addresses" for ddc/ci and the edid eeprom, and as for 0x49 and 0x59, they are 7bit i2c addresses, which, when shifted for the r/w bit can also be represented as 0x92 and 0xb2, which appear in various service manuals of tv sets and monitors based on mstar chips (as well as in screenshots of the mstar isp utility), and are described as 0x49/0x92 being the isp (in-system programming) port, and 0x59/0xb2 being a debug port. i then analyzed the two drivers that i mentioned earlier, and realized that the mstar isp protocol is composed of 5 i2c commands (enable isp, read/write, end r/w command, and reset) that merely encapsulate the spi commands that can be found in the spi flash chips' datasheets. i then simply had to write a spi programmer for the flashrom tool following the mstar i2c isp protocol, and voilà!, moments later, i was flashing my screen's firmware. the patch containing this spi driver is available here: /static/benq/0001-add-programmer-for-the-mstar-i2c-isp-protocol.patch . also, please note that i2c works at 100kb/s, and thus, reading and writing the firmware takes a long time. reading the 2mb takes 3 and a half minutes (and 8192 commands), and writing, which includes verifying afterwards, takes almost 10 minutes (and 32768 commands). tl;dr: # build svn co svn://flashrom.org/flashrom/trunk@1846 flashrom cd flashrom wget -o- http://boeglin.org/static/benq/0001-add-programmer-for-the-mstar-i2c-isp-protocol.patch | patch -p1 make -j # load i2c-dev driver sudo modprobe i2c-dev # list all i2c buses sudo i2cdetect -l # list i2c devices on bus 1 sudo i2cdetect 1 # get edid (0x50) from bus 1 sudo i2cdump -r 0-127 1 0x50 # identify flash chip, on bus 1 (/dev/i2c-1) at address 0x49 sudo ./flashrom -p mstarddc_spi:dev=/dev/i2c-1:49 # dump current firmware sudo ./flashrom -p mstarddc_spi:dev=/dev/i2c-1:49 -c "mx25l1605a/mx25l1606e" -r backup.bin # extend firmware to 2mb, to match the flash chip size tr '\000' '\377' < /dev/zero | dd of=firmware.bin bs=1k count=2k dd if=xl2411z_v2_20131209_8b72.bin of=firmware.bin conv=notrunc # write firmware sudo ./flashrom -p mstarddc_spi:dev=/dev/i2c-1:49 -c "mx25l1605a/mx25l1606e" -w firmware.bin [ view entry ] ( 18235 views ) permalink yet another tv-b-gone 2013-05-02, 19:58 tech and hacks here's my quick and dirty version of the tv-b-gone kit form adafruit industries , the open source version of mitch altman's tv-b-gone . this version is: * derived from firmware v1.2 sources * ported msp430 architecture * tested on msp430g2452 and msp430g2211 * built from scrap parts following are a hand-drawn schematic and the accompanying "routing" diagram (note that there are a pull-up resistor and a pull-down capacitor missing on ¬rst, but the one on p1.3 is handled by p1ren): you can have a look at the repository for my changes, i

URL analysis for boeglin.org

http://www.boeglin.org/blog/static/benq/0001-add-programmer-for-the-mstar-i2c-isp-protocol.patch
http://www.boeglin.org/blog/index.php?m=03&y=09
http://www.boeglin.org/blog/contact.php
http://www.boeglin.org/blog/login.php
http://www.boeglin.org/blog/blog/index.php?category=2
http://www.boeglin.org/blog/blog/index.php?category=1
http://www.boeglin.org/blog/blog/index.php?entry=flashing-a-benq-z-series-for-free(dom)
http://www.boeglin.org/blog/comments.php?y=12&m=03&entry=entry120314-214917
http://www.boeglin.org/blog/index.php?m=12&y=07
http://www.boeglin.org/blog/index.php?m=05&y=13
http://www.boeglin.org/blog/index.php?m=04&y=14&entry=entry140428-001819
http://www.boeglin.org/blog/index.php?m=07&y=05
http://www.boeglin.org/blog/index.php?m=01&y=13
http://www.boeglin.org/blog/comments.php?y=13&m=01&entry=entry130109-013629
http://www.boeglin.org/blog/index.php?m=07&y=05&d=03&entry=entry050703-204055

Whois Information

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Domain Name: BOEGLIN.ORG
Registry Domain ID: D96737275-LROR
Registrar WHOIS Server: whois.gandi.net
Registrar URL: http://www.gandi.net
Updated Date: 2018-04-17T16:42:49Z
Creation Date: 2003-04-17T11:42:22Z
Registry Expiry Date: 2019-04-17T11:42:22Z
Registrar Registration Expiration Date:
Registrar: Gandi SAS
Registrar IANA ID: 81
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +33.170377661
Reseller:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: C172508954-LROR
Registrant Name: Alexandre Boeglin
Registrant Organization:
Registrant Street: Obfuscated whois Gandi-63-65 boulevard Massena
Registrant City: Obfuscated whois Gandi-Paris
Registrant State/Province: Paris
Registrant Postal Code: 75013
Registrant Country: FR
Registrant Phone: +33.170377666
Registrant Phone Ext:
Registrant Fax: +33.143730576
Registrant Fax Ext:
Registrant Email: [email protected]
Registry Admin ID: C172508954-LROR
Admin Name: Alexandre Boeglin
Admin Organization:
Admin Street: Obfuscated whois Gandi-63-65 boulevard Massena
Admin City: Obfuscated whois Gandi-Paris
Admin State/Province: Paris
Admin Postal Code: 75013
Admin Country: FR
Admin Phone: +33.170377666
Admin Phone Ext:
Admin Fax: +33.143730576
Admin Fax Ext:
Admin Email: [email protected]
Registry Tech ID: C172508954-LROR
Tech Name: Alexandre Boeglin
Tech Organization:
Tech Street: Obfuscated whois Gandi-63-65 boulevard Massena
Tech City: Obfuscated whois Gandi-Paris
Tech State/Province: Paris
Tech Postal Code: 75013
Tech Country: FR
Tech Phone: +33.170377666
Tech Phone Ext:
Tech Fax: +33.143730576
Tech Fax Ext:
Tech Email: [email protected]
Name Server: NS6.GANDI.NET
Name Server: FLEX.BOEGLIN.ORG
DNSSEC: signedDelegation
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2018-04-24T10:58:42Z <<<

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  REFERRER http://www.pir.org/

  REGISTRAR Public Interest Registry

SERVERS

  SERVER org.whois-servers.net

  ARGS boeglin.org

  PORT 43

  TYPE domain

DOMAIN

  NAME boeglin.org

  HANDLE D96737275-LROR

  CREATED 2003-04-17

STATUS
clientTransferProhibited https://icann.org/epp#clientTransferProhibited

NSERVER

  NS6.GANDI.NET 217.70.177.40

  FLEX.BOEGLIN.ORG 178.170.95.127

OWNER

  HANDLE C172508954-LROR

  NAME Alexandre Boeglin

ADDRESS

STREET
Obfuscated whois Gandi-63-65 boulevard Massena

  CITY Obfuscated whois Gandi-Paris

  STATE Paris

  PCODE 75013

  COUNTRY FR

  PHONE +33.170377666

  EMAIL [email protected]

ADMIN

  HANDLE C172508954-LROR

  NAME Alexandre Boeglin

ADDRESS

STREET
Obfuscated whois Gandi-63-65 boulevard Massena

  CITY Obfuscated whois Gandi-Paris

  STATE Paris

  PCODE 75013

  COUNTRY FR

  PHONE +33.170377666

  EMAIL [email protected]

TECH

  HANDLE C172508954-LROR

  NAME Alexandre Boeglin

ADDRESS

STREET
Obfuscated whois Gandi-63-65 boulevard Massena

  CITY Obfuscated whois Gandi-Paris

  STATE Paris

  PCODE 75013

  COUNTRY FR

  PHONE +33.170377666

  EMAIL [email protected]

  REGISTERED yes

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