Re: [microblaze-uclinux] Question

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi John,

John McGrath wrote:
> My board has just one 9-pin serial interface - which I am using for 
> STDIN / STDOUT (console). I guess I could attach another serial 
> interface for the debug - but this could be pretty tricky.

Here's another option you may wish to ocnsider.  I'm pretty sure EDK 
will let you double up the stdio/out and debug "attribute" on the same 
serial port.

Then, what you do is connect to the microblaze xmdstub, upload the 
kernel image (with dow -data image.bin 0x80000000), then load the 
bootloader (dow microblaze_0/code/executable.elf)

Then, do "run" on XMD, that will launch the bootloader (not the kernel)

Then, close xmd, and open up some terminal software on the same serial 
port, press eneter a couple of times, you would see the bootloader 
prompt.  You will have missed the actual menu items (they probably got 
printed out by XMD).  But, then you should be able to to launch the 
kernel and see all of the bootup output etc.

To do this, you'll have to moddify the serial port driver in the kernel 
to point to the correct uartlite - it's set in the top of 
linux/arch/microblaze/kernel/xmdserial.c, you should find it ok.

It's a bit fiddly, but will get you going if you dont want to put 
another serial port on the board (with associated RS232 line drivers etc).

Regards,

John

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