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