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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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| There is a draft for an extension of the serprog protocol to SPI. FIXME: Link there.
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| Note that beside the really mandatory serprog commands, if you also implement the O_SPIOP command correctly, it should be enough for flashrom from svn to work correctly.
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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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| FIXME: More info?
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| == Arduino Uno flasher by GNUtoo ==
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| This flasher require the following hardware parts:
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| * An arduino uno 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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| * a 10k resistor
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| * a flash chip to flash
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| === Pictures ===
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| [[Image:Serprog_0001.jpeg|250px]]
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| [[Image:Serprog_0002.jpeg|250px]]
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| [[Image:Serprog_0003.jpeg|250px]]
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| [[Image:Serprog_0004.jpeg|250px]]
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| [[Image:Serprog_0005.jpeg|250px]]
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| [[Image:Serprog_0006.jpeg|250px]]
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| [[Image:Serduino laptop.jpeg|250px]]
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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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| [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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| ==== Performances ====
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| # time flashrom -p serprog:dev=/dev/ttyACM0:115200 -r coreboot.rom
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| flashrom v0.9.5.2-r1523 on Linux 3.0.0-17-generic-pae (i686), built with libpci 3.1.7, GCC 4.5.2, little endian
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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 1m40.680s
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| user 0m0.884s
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| sys 0m0.268s
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| # time flashrom -p serprog:dev=/dev/ttyACM0:115200 -w coreboot.rom
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| flashrom v0.9.5.2-r1523 on Linux 3.0.0-17-generic-pae (i686), built with libpci 3.1.7, GCC 4.5.2, little endian
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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 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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| real 3m19.720s
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| user 0m1.972s
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| sys 0m0.364s
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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/ttyACM0:115200
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| === Advantages and disadvantages ===
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| * The speed isn't that great(about 3 minutes for reading+writing+verifying a 1M chip)
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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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| == InSystemFlasher by Juhana Helovuo ==
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| This is one uses a modified serprog version to talk 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. To be updated when flashrom's serprog module has the needed changes merged to do SPI communication.
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| [[File:atmegaXXu2-flasher.jpg|200px|thumb|right|atmegaXXu2-flasher with Pomona SOIC hook attached]]
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