On 7/5/11 3:02 AM, Peter Stuge wrote: > Andreas Galauner wrote: >> Yep, I just found the pinheader. Seems to be 1.27x1.27mm. >> I also created a support ticket for the pinout on Sapphire's website. >> It would be nice if they give that to me, but I really doubt it. > > Did you check that it's not documented in the manual already? >
Yes. It's not in there. They labled the POST-Code display, they have huge tables of really cool POST code error message explanations and on one pciture of the POST display there even is a header on those SPI pins installed, but there is nothing about the pinout. > >> I'll try to measure the pinout tomorrow with a multimeter. > > Sure, that will work fine. Each pin will be directly connected to a > pin on the flash chip. > I'm just asking myself all the time what to do with the supply lines. If the board is without power or in standby, I obviously need to supply power (assuming that there is a VCC line on the header), but if it is on and I just pull the reset line before starting the programming, this sounds a bad idea to me. So the user needs to specify, if he wants to supply power or not, right? > >>> What do you mean by AVR? It's relevant for much of what you write. >> >> Oh, sorry. I mean those Atmel AVR microcontrollers. > > Yes Atmel, but "AVR" says nothing about which family of devices you > mean. If it's the wee small 8-bit ones I wouldn't bother, on the > other hand if you have a toolchain then sure, why not! > I think I'll get one of those Olimex boards. I always wanted to do something with ARM CPUs and it makes porting the firmware to your suggested final device much easier. Nice idea, BTW. > >> I haven't done very much with SPI flashes until now. I know how the >> physical protocol works and used it a few times in some smaller >> microcontroller projects, but I definetely would want to take a >> look at it. > > It's fairly simple. Pick up a flash chip datasheet and you've > actually already got mostly all you need to know. The flashrom source > code can also help, but be careful to not get unneccessarily confused > by the code to deal with different types of SPI bus masters in there. > I just had a look at some datasheets. > >> And the development board is easily available and cheap in Germany. > > Yup. What city are you in? Aachen or Cologne. Choose one ;) Andreas -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
