Can avr-gdb/avarice be used with source written in assembly (eg, can gdb
display values stored in specific registers)? The code would be assembled
with avra.
Also, do I understand correctly that to use JTAG in a Linux environment, I
first need to use ISP once to enable the JTAGEN fuse, but thereafter the
fuse can remain enabled over a sequence of program and debug sessions?
For context, I teach a course in Computer Organization and Architecture
using the AVR, and I specifically want students to work in assembly for
the insight it gives into the inner workings of the processor. I have a
set of STK500's and Dragons for this. I currently have Atmega8515L chips
that came with the STK500's, but I am considering moving to ATmega16L
for JTAG support. (I think debugWIRE is probably not feasible for this
because, if I understand correctly, in Linux it requires using HV
programming to disable the DWEN fuse between each debug and program
operation. But HV and ISP/ICE need different physical connections on the
STK500, and I don't trust every student to do this correctly every time. I
think it would result in fried boards.)
Thanks,
Marge Coahran
Computer Science
Grinnell College
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