Lpc2000

Hello Ake,

On Wednesday 21 December 2005 10:51, Ake Hedman, eurosource wrote:
> Hi Dominic,
>
> Sounds very interesting! How far have you come in this development?
> What remains to do?  Maybe I could help on some development...
Currently, it's mostly testing and debugging - differents hosts, targets, jtag 
interfaces. Stability and correctness are most important for a debugger, so 
currently I'm writing small test cases, run them in target RAM, and see if 
the state captured by the debugger is correct. What I'm interested in is 
people trying the software, and reporting problems they've experienced - 
development contributions are of course welcome, too.
What's currently missing is flash write support, but that's easy to add (for 
the LPCs), and MMU/Cache support, which isn't necessary for LPCs.

>
> So any FT232x based ARM board would do for this? Is the board
> requirements documented somewhere.
No, FT2232C, not FT232. The FT2232C comes with a multi-protocol synchronous 
serial engine that can be configured as a JTAG TAP master. The DLP2232M is an 
evaluation module available from FTDI (www.ftdichip.com), it comes with the 
chip, a USB connector, eeprom, crystal, i.e. all the supporting circuitry. 
The FT2232C has two I/O channels which accept either 3.3V or 5V logic - USB 
runs at 5V, so if you want to debug 3.3V targets you simply supply the chip 
with 3.3V from a voltage regulator powered by the USB. My diploma thesis 
(available at the project site openocd.berlios.de) contains schematics for a 
very simple interface. I'll upload schematics for a more advanced design 
within the next days.

>
> /Ake

Kind regards,

Dominic