Difference between revisions of "Serprog/Arduino flasher"
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* will have to use the real serial ports (ports 0 and 1 and ground), check the arduino documentation for getting the correct voltage, USB<->Serial adapter .
Revision as of 22:48, 10 May 2013
This flasher require the following hardware parts:
- An arduino uno or an arduino Duemilanove(way faster) and its usb cable
- some wires(optionally some connectors to solder on(for easier plugin and more reliability)
a 10k resistor
- 3 x 10k resistors (for the 3.3v version)
- 3 x 15k resistors (for the 3.3v version)
- A flash chip with the following characteristics:
- supported by flashrom
- 3.3v or 5v(the arduino has a 3.3v and a 5v output, only 3.3v was tested...)
Pictures (With the 5V SPI levels issue)
Building (With the 5V SPI levels issue)
Left pins of the BIOS chip: -------------------------------------------------------- [pin1 of the bios chip] /CS<->10k resistor<->VCC [pin1 of the bios chip] /CS<->Arduino pin10(SS, PORTB2) [pin2 of the bios chip] DO<->Arduino pin12(MISO, PORTB4) [pin3 of the bios chip] /WP<->VCC [pin4 of the bios chip] GND<->GND on the power pins Right pins of the BIOS chip: -------------------------------------------------------- [pin8 of the bios chip] VCC<->+3.3V on the power pins of the Arduino [pin7 of the bios chip] /HOLD<->VCC [pin6 of the bios chip] CLK<->Arduino pin13(SCK, PORTB5) [pin5 of the bios chip] DIO<->Arduino pin11(MOSI, PORTB3) The Bios chip used is a W25X80. The Arduino is an arduino uno.
Pictures (With the 3.3V SPI levels)
Improved 3.3v version by Simon Inns (no issue anymore with laptop chips)
|git branch||Compatible Arduino version||flashrom arguments||Comments|
# time flashrom -p serprog:dev=/dev/ttyACM0:2000000 -r coreboot.rom flashrom v0.9.5.2-r1541 on Linux 2.6.38-14-generic (x86_64) flashrom is free software, get the source code at http://www.flashrom.org Calibrating delay loop... OK. serprog: Programmer name is "serprog-duino" Found Winbond flash chip "W25X80" (1024 kB, SPI) on serprog. Reading flash... done. real 0m16.602s user 0m0.930s sys 0m0.000s
# time flashrom -p serprog:dev=/dev/ttyACM0:2000000 -w build/coreboot.rom flashrom v0.9.5.2-r1541 on Linux 2.6.38-14-generic (x86_64) flashrom is free software, get the source code at http://www.flashrom.org Calibrating delay loop... OK. serprog: Programmer name is "serprog-duino" Found Winbond flash chip "W25X80" (1024 kB, SPI) on serprog. Reading old flash chip contents... done. Erasing and writing flash chip... Erase/write done. Verifying flash... VERIFIED. real 0m39.548s user 0m2.650s sys 0m0.000s
To make it work you need:
- flashrom from svn
- serprog-duino which runs on the arduino
- The avr toolchain(avr-gcc, avr-libc,make etc...)
Building the software
$ svn co svn://flashrom.org/flashrom/trunk flashrom $ cd flashrom && make $ cd ../ $ git clone git://gitorious.org/gnutoo-personal-arduino-projects/serprog-duino.git $ cd serprog-duino && make && make upload
./flashrom -p serprog:dev=/dev/ttyACM0:2000000
- SST25VF016B => huge issues, not recognized by the 3.3v version, had to use the 5v version which is over maximum allowed voltage, also had to lower the serial speed to 115200, ultra slow to write(seem related to the chip itself, since that with the openmoko programmer it's even slower...)...
- W25X80 works well in 3.3v mode(5v works also but it's highly not advised to use 5v)
Advantages and disadvantages
The speed isn't that great(about 3 minutes for reading+writing+verifying a 1M chip)
- The speed is now much better thanks to a patch by Sebastian Parborg.
- it is made of very commonly available parts(if you can find an arduino uno, you will be able to build it).
Voltage issues( SPI levels are at 5v, it's problematic for flashing 3.3v chips...)
Find a way to lower the voltage to 3.3v
- Fix the arduino UNO speed and reliability issues