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Memory Utilization
=====================
'text' is what ends up in flash (only).
'data' is initialized variables: need to be storad in flash, then end up in RAM.
'bss' is uninitialized data: nothing in flash, but does consume RAM.
The "-x --format=sysv" flags to arm-none-eabi-size can be helpful.
Debugging
================
Access all registers:
(gdb) x/x 0xE000ED14
0xe000ed14: Cannot access memory at address 0xe000ed14
(gdb)
0xe000ed18: Cannot access memory at address 0xe000ed18
(gdb) show mem inaccessible-by-default
Unknown memory addresses will be treated as inaccessible.
(gdb) set mem inaccessible-by-default off
(gdb) x/x 0xE000ED14
0xe000ed14: 0x00000200
Uploading via SWD
====================
upload_blackmagic.sh:
#!/bin/bash
arm-none-eabi-gdb build/stm32f401cc_telemetry.elf < load_blackmagic.gdb
sleep 1.0
load_blackmagic.gdb:
target extended-remote /dev/ttyACM0
monitor swdp_scan
attach 1
load
quit
References
=============
Keil Application Note 209: Using Cortex-M3 and Cortex-M4 Fault Exceptions
ARM Cortex-M3 HardFault Status Register Documentation:
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0553a/Cihdjcfc.html
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