Hi Guys,
I’m new to Yagarto tools and I’m trying to debug LPC2131.
How do I show the status of the peripherals? (I tried to view them by monitoring their memory but all that’s displayed are ??? )
How do I enable the global variable icon? (it’s greyed out)
How would I generate a .lst file?
Thanks
TJ
Hi TJ.
All debugging in Eclipse is done when the application has stopped (it hit a breakpoint or you hit the “pause” button).
To look at a device register, you must know it’s memory address. For example, the Output Data Status Register (PIO_ODSR) in an Atmel AT91SAM7S256 cpu is at 0xFFFFF438.
In Eclipse, you can bring up the “Expressions” view in the debugger, right-click and select “Add Watch Expression”. Enter a valid C language expresion such as: *(0xFFFFF438)
The next time the application stops, the “Expressions” view will show the evaluated expression like this:
*(0xFFFFF438) = 12 (I think you are stuck with decimal format)
When I run the Eclipse debugger, the “Add Globals” icon is greyed-out while the application is running and properly illuminated when the application stops.
There is no list file, per se, for the C compiler to be generated (what would it show in any case). There is a list file that can be generated by the assembler. For example,
arm-elf-as -ahls -mapcs-32 -o crt.o crt.s
will assemble the file crt.s and produce a listing with high level statements mixed in with symbol info, etc.
It is possible to command the GNU C compiler to not generate an object file but rather generate an assembler source file. You do that with the -S command-line argument.
arm-elf-gcc -S main.c
The above example will compile main.c and produce an assembler source file “main.s”. You could then run this through the GNU assembler as shown above and get a detailed listing file.
There’s usually no need for a C listing file. When your application stops, the Eclipse assembler view will show the disassembled C code with the high-level statements annotated within the assembler statements.
Cheers,
Jim Lynch
p.s. you might want to read my tutorial “Using Open Source Tools for AT91SAM7 Cross Development” . Find it at www.at91.com
Hi Jim,
Thank you for your response.
I’m not familiar with ARM assembly(rookie) therefore I thought if I can get a preview of what is being generated by a C code (like the Eclipse assembler view without going into debug) then I could kinda learn from it.
Yungky