Thanks for your response. I was hoping to use something I
build myself to do the BDM programming. Something similar
to what people are doing for the LART project with JFlash.
I understand a NDA is required for all the details about
the JTAG/COP port on the MPC8240 but all I really need
here is basic flash programming so I can bootstrap
something that will load a real bootloader through the
uart. Is enough information about the BDM available to do
this? I'm not afraid of hacking something together if the
information is there.
Thanks again.
--Dustin
On Mon, 18 Feb 2002 21:17:26 +0100
Langus Matevz RDHW_EXT <langus at iskratel.si> wrote:
> Hi!
>
> I don't see any reasons to add buffers betwen UART and
> CPU. Max232 does all
> driving usually.
>
> Programming Flash thru BDM is a good idea, just be
> careful which BDM
> debugger you will buy. I have a lot of problems with
> Windriver's
> visionProbe-II and visionICE-II. They do not work with
> never versions of
> MPC8260 - I need to renew (and pay) licence in order to
> get it working. And
> Windriver is responding very slowly...
> Choose another one.
>
> >but what is the cheapest way to get a 4-6 layer board
> done.
>
> Try www.iskratel-electronics.si
>
> Matevz
>
> -----Original Message-----
> From: Dustin Byford [mailto:dustin at firein.net]
> Sent: Monday, February 18, 2002 11:34 AM
> To: linuxppc-embedded at lists.linuxppc.org
> Subject: custom mpc8240 student project (long)
>
>
>
> Hi,
>
> For purely academic purposes I am building an IP router
> based on an mpc8240
> in my "capstone" EE class at NMSU. I was wondering if
> someone who may have
> done something similar could tell me if I'm working in
> the right direction.
> I've done some research with the list archives and I
> think I have decided on
> a basic hardware layout. I'm just wondering if my ideas
> are sane and I have
> a couple of questions.
>
> I will be wire-wrapping the entire design (sockets have
> been acquired) and
> and plan to use:
>
> MPC8240 (At ~30MHz bus)
> National 16550 UART connected to RCS1, etc...
> 2 16-bit flash ROMs (8MByte total) (Am29LV320D x2)
> connected toRCS0, etc...
> 128MB SDRAM in 1 DIMM PCI (wire wrap board attached to a
> backplane) with 2
> FA310TX netgear cards There is also a reset circuit, a
> power supply, and I'm
> guessing I need a buffer between the UART and the CPU and
> a MAX232 for
> serial line driving.
>
> I also planned to start out by programming the ROMs
> through the BDM/JTAG
> port on the CPU. I'll start with the GDB target for MPCs
> and attempt to
> load a program into RAM to program the 2 flashes,
> with--ppcboot. Hopefully
> this will allow me to run the 2.4_devel version of the
> ppc kernel,
> busybox/uclibc as a distro and iptables as the "router".
>
> I'm expecting many frustrations (I mean learning
> experiences) along the way
> and I suppose I'll begin with sandpoint code for ppcboot
> and the kernel.
>
> So, what do you think. Will it work? Also, is there
> maybe a different
> kernel I should start out with. Anybody see any major
> pitfalls?
>
> Also, in the chance that this works I would love to PCB
> it and fire it up at
> 200 MHz/100MHz Memory/66MHz PCI and then hang it on my
> wall because I have
> to give the 8240 back to my professor. I can design the
> PCB but what is the
> cheapest way to get a 4-6 layer board done.
>
> Thanks for any and all advice!
>
> --Dustin
>
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