[flashrom] Arduino LPC flasher?

[Benjamin Henrion]

On Tue, Mar 29, 2011 at 3:02 AM, Joseph Smith <joe at settoplinux.org> wrote:
> On 03/28/2011 03:11 AM, Benjamin Henrion wrote:
>>
>> On Sun, Mar 27, 2011 at 2:22 PM, Benjamin Henrion<bh at udev.org>  wrote:
>>>
>>> On Sun, Mar 27, 2011 at 2:10 PM, Stefan Tauner
>>> <stefan.tauner at student.tuwien.ac.at>  wrote:
>>>>
>>>> On Sun, 27 Mar 2011 13:25:05 +0200
>>>> Benjamin Henrion<bh at udev.org>  wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I am trying to port this code to an Arduino Duemilanove (atmega328p):
>>>>>
>>>>>
>>>>> http://mikestirling.co.uk/2010/08/programming-an-lpc-flash-with-an-avr-and-flashrom/
>>>>>
>>>>> When I change the chip to atmega168, I have the following error:
>>>>>
>>>>> avr-gcc -c -mmcu=atmega168 -I. -g -Os -funsigned-char
>>>>> -funsigned-bitfields -fpack-struct -fshort-enums -Wall
>>>>> -Wstrict-prototypes -Wa,-adhlns=uart.lst  -std=gnu99 -DF_CPU=7372800
>>>>> -Wp,-M,-MP,-MT,uart.o,-MF,.dep/uart.o.d uart.c -o uart.o
>>>>> uart.c: In function ‘__vector_18’:
>>>>> uart.c:65: error: ‘_UDR’ undeclared (first use in this function)
>>>>> uart.c:65: error: (Each undeclared identifier is reported only once
>>>>> uart.c:65: error: for each function it appears in.)
>>>>> uart.c: In function ‘__vector_19’:
>>>>> uart.c:83: error: ‘_UDR’ undeclared (first use in this function)
>>>>> uart.c: In function ‘uart_init’:
>>>>> uart.c:281: error: ‘_UBRR’ undeclared (first use in this function)
>>>>> make: *** [uart.o] Error 1
>>>>>
>>>>> Any idea what to change?
>>>>>
>>>>> Having a simple Arduino being able to flash BIOS chips would be
>>>>> awesome...
>>>>>
>>>>
>>>> the register names for the uart are probably different. e.g. for my
>>>> atmega32u2 i would have to use UDR1 and UBRR1[H|L].
>>>> just look it up in the datasheet or /usr/lib/avr/include/avr/.
>>>> HTH
>>>
>>> I have replaced all the _UDR references directly by UDR0, the same for
>>> _UBRR, and it compiles fine now.
>>>
>>> Now the Arduino Duemilanove can work in 3.3V if I am not mistaken, I
>>> tried in 5V, it gives me the following error:
>>>
>>>  #  flashrom -p serprog:/dev/ttyUSB0:115200
>>> flashrom v0.9.2-r1028 on Linux 2.6.35-27-generic (x86_64), built with
>>> libpci 3.0.0, GCC 4.4.4, little endian
>>> flashrom is free software, get the source code at http://www.flashrom.org
>>>
>>> Calibrating delay loop... OK.
>>> Error: cannot synchronize protocol
>>> - check communications and reset device?
>>
>> It founds now the arduino, but not the LPC chip:
>>
>> ========================================================
>> flashrom -p serprog:/dev/ttyUSB0:115200
>> flashrom v0.9.2-r1028 on Linux 2.6.35-27-generic (x86_64), built with
>> libpci 3.0.0, GCC 4.4.4, little endian
>> flashrom is free software, get the source code at http://www.flashrom.org
>>
>> Calibrating delay loop... OK.
>> serprog:Programmer name "ATMega88 LPC   "
>> No EEPROM/flash device found.
>> Note: flashrom can never write if the flash chip isn't found
>> automatically.
>> ========================================================
>>
>> I am probably wrong in my pinout matching:
>>
>> http://www.zoobab.com/arduino-as-a-bios-lpc-flasher
>>
>> If someone knows more about LPC...
>>
> Cool project :-)
> I have been eyeing the UBW32 for a while for same purpose. One thing I
> noticed on your link is you have LAD2 and LAD3 open ended. You WILL need all
> 4 LAD lines. There is no way to even detect the chip without it. Here is a
> good reference on LPC and FWH I/O operations:
>
> http://www.intel.com/design/chipsets/industry/lpc.htm
>
> As far as the rest of the LPC pins as long as you have them connected to a
> arduino gpio they should work fine (as long as the data signal is no greater
> than 3.3v). As far as what LPC pins, power pins, and ground pins need to be
> connected on the chip google around and research the Cheapmod for xbox. If
> your lucky you may find a schematic. Hope that helps.

Mike just sent me his pinout for the atmega88:

"CLK - PORTC[5] - ATMEGA88 (DIL) pin 28
/LFRAM - PORTC[4] - ATMEGA88 (DIL) pin 27
LAD[3] - PORTC[3] - ATMEGA88 (DIL) pin 26
LAD[2] - PORTC[2] - ATMEGA88 (DIL) pin 25
LAD[1] - PORTC[1] - ATMEGA88 (DIL) pin 24
LAD[0] - PORTC[0] - ATMEGA88 (DIL) pin 23

/WP, /TBL, /INIT all tied high
Any other pins, e.g. MODE and ID pins, are no connect."

I should be able to try it this evening after work...

--
Benjamin Henrion <bhenrion at ffii.org>
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