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| {{DISPLAYTITLE:serprog}} | | {{#externalredirect: https://www.flashrom.org/supported_hw/supported_prog/serprog/overview.html}} |
| This page is a first draft only and serves to collect information about the serprog protocol and the programmers implementing it.
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| = Protocol =
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| See [http://flashrom.org/trac/flashrom/browser/trunk/Documentation/serprog-protocol.txt serprog-protocol.txt] in the source tree. It is designed to be compact and allow efficient storage in limited memory of programmer devices.
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| = Hardware =
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| == AVR flasher by Urja Rannikko ==
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| [[File:Avr rs232 programmer.jpg|thumb|right|Prototype RS232 AVR parallel flash programmer]]
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| The [http://www.randomprojects.org/wiki/Prototype_RS232_AVR_parallel_flash_programmer Prototype RS232 AVR parallel flash programmer] Urja Rannikko was the first implementation of the serprog protocol.
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| FIXME: AVR source code is somewhere in the coreboot mailing list archives...
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| == AVR flasher by eightdot ==
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| FIXME: Link?
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| == Arduino Mega flasher by fritz ==
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| [http://www.flashrom.org/pipermail/flashrom/2010-May/003250.html]
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| [http://www.coldelectrons.com/blog/?page_id=165]
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| [http://www.coldelectrons.com/blog/wp-content/uploads/2010/05/flashprg.txt]
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| FIXME: More info?
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| == InSystemFlasher by Juhana Helovuo ==
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| This is one talks to SPI devices via serial over USB. Details can be found in the [http://www.coreboot.org/InSystemFlasher coreboot wiki] and in this [http://www.coreboot.org/pipermail/coreboot/2011-February/063349.html coreboot mailing list thread].
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| == atmegaXXu2-flasher by Stefan Tauner ==
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| Like the InSystemFlasher this one uses LUFA on an AVR microcontroller to tunnel the serial data over USB.
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| [[File:atmegaXXu2-flasher.jpg|200px|thumb|right|atmegaXXu2-flasher with Pomona SOIC hook attached]]
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| == Arduino flasher by GNUtoo ==
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| '''WARNING, I heard that the SPI levels were at 5V, while I tried it with 3.3V chip and that it worked, it may not work for you and break the chip...'''
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| This flasher require the following hardware parts:
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| * An arduino uno or an arduino Duemilanove(way faster) and its usb cable
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| * some wires(optionally some connectors to solder on(for easier plugin and more reliability)
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| * <s>a 10k resistor</s>
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| * A flash chip with the following characteristics:
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| ** supported by flashrom
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| ** SPI
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| ** 3.3v or 5v(the arduino has a 3.3v and a 5v output, only 3.3v was tested...)
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| === Pictures ===
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| <gallery caption="Pictures " widths="250px" heights="250px" perrow="4">
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| File:Serprog_0001.jpeg
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| File:Serprog_0002.jpeg
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| File:Serprog_0003.jpeg
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| File:Serprog_0004.jpeg
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| File:Serprog_0005.jpeg
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| File:Serprog_0006.jpeg
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| File:Serduino_laptop.jpeg| Because of the long cables flashrom had to retry once before reflashing the BIOS but at the end it worked. So don't use cables that are that long...
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| File:W1qtO.jpg| Setup by Sebastian Parborg (DarkDefender)
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| File:Arduino_topview_noresistor.jpeg| It now seem to also work without resistor...
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| </gallery>
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| === Building ===
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| Left pins of the BIOS chip:
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| --------------------------------------------------------
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| [pin1 of the bios chip] /CS<->10k resistor<->VCC
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|
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| [pin1 of the bios chip] /CS<->Arduino pin10(SS, PORTB2)
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| [pin2 of the bios chip] DO<->Arduino pin12(MISO, PORTB4)
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| [pin3 of the bios chip] /WP<->VCC
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| [pin4 of the bios chip] GND<->GND on the power pins
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|
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| Right pins of the BIOS chip:
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| --------------------------------------------------------
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| [pin8 of the bios chip] VCC<->+3.3V on the power pins of the Arduino
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| [pin7 of the bios chip] /HOLD<->VCC
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| [pin6 of the bios chip] CLK<->Arduino pin13(SCK, PORTB5)
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| [pin5 of the bios chip] DIO<->Arduino pin11(MOSI, PORTB3)
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| The Bios chip used is a W25X80.
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| The Arduino is an arduino uno.
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| === Software ===
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| ==== Settings ====
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| {| class="wikitable" border="1"
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| !git branch
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| !Compatible Arduino version
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| !flashrom arguments
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| !Comments
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| |-
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| | master
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| * Arduino uno
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| | -p serprog:dev=/dev/ttyACM0:2000000
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| * reliability issues (flashrom blocks waiting for data from the arduino indefinitely) with the code that is in the 8u2/16u2 beeing investigated...
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| |-
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| | ftdi
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| * Arduino Duemilanove
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| * Arduino uno with an external FTDI serial<->usb adapter or any other kind of adapter capable of 2000000 bps
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| | -p serprog:dev=/dev/ttyUSB0:2000000
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| * Works flawlessly
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| * Very fast
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| |-
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| |}
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| ==== Performances ====
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| # time flashrom -p serprog:dev=/dev/ttyACM0:2000000 -r coreboot.rom
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| flashrom v0.9.5.2-r1541 on Linux 2.6.38-14-generic (x86_64)
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| flashrom is free software, get the source code at http://www.flashrom.org
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| Calibrating delay loop... OK.
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| serprog: Programmer name is "serprog-duino"
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| Found Winbond flash chip "W25X80" (1024 kB, SPI) on serprog.
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| Reading flash... done.
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| real 0m16.602s
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| user 0m0.930s
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| sys 0m0.000s
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| # time flashrom -p serprog:dev=/dev/ttyACM0:2000000 -w build/coreboot.rom
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| flashrom v0.9.5.2-r1541 on Linux 2.6.38-14-generic (x86_64)
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| flashrom is free software, get the source code at http://www.flashrom.org
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|
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| Calibrating delay loop... OK.
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| serprog: Programmer name is "serprog-duino"
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| Found Winbond flash chip "W25X80" (1024 kB, SPI) on serprog.
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| Reading old flash chip contents... done.
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| Erasing and writing flash chip... Erase/write done.
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| Verifying flash... VERIFIED.
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|
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| real 0m39.548s
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| user 0m2.650s
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| sys 0m0.000s
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| ==== Required software ====
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| To make it work you need:
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| * flashrom from svn
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| * [https://gitorious.org/gnutoo-personal-arduino-projects/serprog-duino serprog-duino which runs on the arduino]
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| * The avr toolchain(avr-gcc, avr-libc,make etc...)
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| ==== Building the software ====
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| $ svn co svn://flashrom.org/flashrom/trunk flashrom
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| $ cd flashrom && make
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| $ cd ../
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| $ git clone git://gitorious.org/gnutoo-personal-arduino-projects/serprog-duino.git
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| $ cd serprog-duino && make && make upload
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| ==== Running flashrom ====
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| ./flashrom -p serprog:dev=/dev/ttyACM0:2000000
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| === Advantages and disadvantages ===
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| * <s>The speed isn't that great(about 3 minutes for reading+writing+verifying a 1M chip)</s>
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| * The speed is now much better thanks to a patch by Sebastian Parborg.
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| * it is made of very commonly available parts(if you can find an arduino uno, you will be able to build it).
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