[AVaRICE-user] debugWire support partially added

[Joerg W. <j...@ur...>]

I just added a first implementation draft for debugWire support (for
the JTAG ICE mkII) to CVS.  Find the CVS log message below.

Any volunteers for reworking the breakpoint implementation are very
welcome. ;-)


First stab at implementing debugWire support to AVaRICE.

This is already basically functional now, with some exemplary tests
run on an ATmega48 (that is the sole dW target device right now in
devdescr.cc).

No attempt has been done to implement flash writes, so they might or
might not work.  Flash, EEPROM, and SRAM (including register space and
IO register space) reads are known to work.

Breakpoints are not yet available, as dW does not support hardware
breakpoints but only software breakpoints.  This requires a major
rework of the current breakpoint implementation, in particular in
order to not impose more breakpoint set/clear operations to the ICE
than absolutely necessary, as they end up in flash page rewrites for
software breakpoints.
-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)