Re: [flashrom] BPv3.6 w flashrom

[Idwer Vollering]

Please "reply to all".

2012/12/5 Nabil :
> Sorry there's one thing I'm not sure I understand...
> Is it possible to adjust the locations of the wires of the soic clip so they match up with the correct pinouts?
> I just dont get how gnd (pin 10 of bus pirate) can be connected to the soic clip (only 8 cables which connect to pins 1-8)
> there's something I'm missing here i think, could you explain to me how to use an soic clip in detail, sorry for the trouble, much obliged. Nabs

Which soic8 clip do you have? I have a Pomona 5250; it is possible to
adjust the wire locations (pinouts) if you have the probe cable (that
fits on the open end of the wires - the other end is a box header that
connects to the buspirate):
http://dangerousprototypes.com/2011/08/03/new-bus-pirate-probe-cable/
> Idwer Vollering  wrote:
> > 2012/12/5 Nabs :
> > > Hi, sorry for the trouble. I'm running bus piratev3.6, bootloaderv4.4,
> > > firmwarev6.1 on flashrom-0.9.6.1, i plan to run the BP at 1M.
> > >
> > > When i run the command "flashrom -p buspirate_spi:dev=/dev/ttyUSB0 -Vr
> > > oldbios.bin"
> > > I get:
> > > "
> > > Found Generic flash chip "unknown SPI chip (RDID)" (0 kB, SPI) on
> > > buspirate_spi.
> > > Probing for Generic unknown SPI chip (REMS), 0 kB: probe_spi_rems: id1 0x0,
> > > id2 0x0
> > > Found Generic flash chip "unknown SPI chip (RDID)" (0 kB, SPI).
> > > ===
> > > This flash part has status NOT WORKING for operations: PROBE READ ERASE
> > > WRITE
> > > " etc...
> > >
> > > I think i have the wiring wrong which is why i get that error, i wonder if
> > > you could help me as its my first time?
> > > I'm trying to use In-circuit programming with a soldered bios chip using an
> > > 'SOIC 8 clip' and it has 8 wires. But the bus pirate has 10 pins.
> > >
> > > From another thread, these are the connections i need:
> > > Bus Pirate "MISO" (Pin 1) <----- SPI Device "DO" (Wire/Pin 2)
> > > Bus Pirate "CS" (Pin 2) -----> SPI Device "CS" (Wire/Pin 1)
> > > Bus Pirate "MOSI" (Pin 3) -----> SPI Device "DI" (Wire/Pin 5)
> > > Bus Pirate "CLK" (Pin 4) -----> SPI Device "CLK" (Wire/Pin 6)
> > > Bus Pirate "GND" (Pin 10) <----> SPI Device "GND" (Wire/Pin 4)
> > >
> > > It appears to me that GND is pin 10 and that the wires of the SOIC8 clip
> > > only contact pins 1-8, so how can this work?
> > >
> > > Also, could i just check the layout of the pins on the bus pirate if i'm
> > > reading it correctly on BPv3.6:
> > > 10  9
> > > 8    7
> > > 6    5
> > > 4    3
> > > 2    1
> > >
> > > Corresponding to:
> > > GND  3V3
> > > +5V    ADC
> > > VPU   AUX
> > > CLK    MOSI
> > > CS     MISO
> >
> > Forget the existence of +5V, VPU, ADC and AUX for now (
> > http://dangerousprototypes.com/docs/Bus_Pirate_I/O_Pin_Descriptions ),
> > connect the clip to the buspirate so that the clip passes the
> > buspirate pins like mentioned in this post:
> > http://www.coreboot.org/pipermail/flashrom/2012-November/010178.html
> >
> > This works for me, with a MX25L1605A soic8 chip:
> >
> > CS# (CS)                                          [1  chip  8]    VCC
> > (bridge with buspirate pin 3+7)
> > SO (MISO)                                        [2  chip  7]    HOLD# (+3V3)
> > WP# (bridge with buspirate pin 7+8)    [3  chip  6]    SCLK (CLK)
> > GND (GND)                                       [4  chip  5]    SI (MOSI)
> > > Or are the pin numbers read in the opposite direction?
> > > ie
> > > 9  10
> > > 7  8
> > > 5  6
> > > 3  4
> > > 1  2
> > >
> > > Here's an image of my bus pirate if it helps:
> > > http://dangerousprototypes.com/wp-content/media/2012/11/Bus-Pirate-v3.6inter...
> > >
> > > Your help is much appreciated and i appreciate your patience, Nabs.
> > >
> > > flashrom mailing list
> > > [e-mail]
> > > http://www.flashrom.org/mailman/listinfo/flashrom