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---------------------------------------------------------------------
- __________ __ ___.
- Open \______ \ ____ ____ | | _\_ |__ _______ ___
- Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- \/ \/ \/ \/ \/
- $Id$
-
- Copyright (C) 2002 by Linus Nielsen Feltzing
-
---------------------------------------------------------------------
-
-Debugging the Archos Jukebox
-----------------------------
-
-To debug using the serial port on the Jukebox, you need to do the following:
-
-1) Connect the serial port to the PC. This is best done with the "serial
- port mod" described on the home page, along with a serial port converter
- for the 3V signals from the Jukebox.
-
-2) Build or download a GDB SH1 cross debugger
-
-3) Compile the GDB stub from the CVS "gdb" archive
-
-4) Copy the newly built ARCHOS.MOD to the Jukebox.
-
-5) Start the Jukebox and fire up the GDB with the elf file you want to debug
- as an argument along with the baud rate:
-
- # sh-elf-gdb -b 38400 test.elf
-
-6) In GDB, type:
-
- (gdb) target remote /dev/ttyS0
-
- /dev/ttyS0 is the serial port you want to use. I guess Windows users
- would type COM1 or something like that.
-
- GDB should answer with a message like:
-
- Remote debugging using /dev/ttyS0
- 0x090014b6 in ?? ()
- (gdb)
-
-7) Load the code from the elf file you specified on the command line:
-
- (gdb) load
-
- GDB should answer like this:
-
- Loading section .text, size 0x6b00 lma 0x9018000
- Loading section .data, size 0x738 lma 0x901eb00
- Start address 0x9018290, load size 29240
- Transfer rate: 11696 bits/sec, 102 bytes/write.
- (gdb)
-
-8) You're set. Now try to set a breakpoint and run:
-
- (gdb) b 22
- Breakpoint 1 at 0x90182c6: file led.c, line 14.
- (gdb) c
- Continuing.
-
- Breakpoint 2, main () at led.c:15
- 15 SSR1 &= ~(SCI_RDRF | SCI_ORER | SCI_PER | SCI_FER);
- (gdb)
-
- Good luck!
-
-
-Technical details:
-
- As for now, the GDB stub occupies the memory from 0x900000 up to
- 0x9018000. This will change.
-
- Compile and link your test program at 0x9018000 and up, and it will work.
-
- The baud rate is 38400, and the settings are 8N1.