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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_project.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>
"STM32/ARM Cortex-M3 HOWTO: Development under Ubuntu (Debian)" (from fun-tech.se:
<http://fun-tech.se/stm32/)>
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