[Milkymist-devel] about LM32 onchip debug

[Sébastien Bourdeauducq]

Hi,

> I'm interested on switching some designs from openrisc to LM32, but I have
> not found any way to debug software onchip as I already do using GDB for
> Openrisc.

Yeah, OpenRISC has excellent software and debug support. Quite a shame its HDL 
implementation and performances are so bad.

> Googling a bit, I found the message that is quoted below on Milkymist-devel
> mailing list.
>
> This may be of your interest: several months ago, Nathan Yawn from
> Opencores developed a new debug unit for openrisc that supports standalone
> jtag and BSCAN based jtag interfaces.
> On the software side, he has developed a debug proxy that supports some of
> the most popular cables such as altera, xilinx usb and parallel, etc...
> I've developed support for FTDI 2232 based cables based on urJtag code.
>
>
> Maybe that the bscan interface and the cable support layer can be reused
> for LM32 onchip debug infrastructure. You can find it under
> http://www.opencores.org/project,adv_debug_sys

Interesting! Thanks for the suggestion :)
Does anyone here want to port this to LM32?

Sébastien