We have good experience with STM32f100, STM32F05x but for our new product we used STM32F030 and I am not able to program it over GDB. The interesting think is that F05x can be programmed over GDB without errors (monitor reset halt, then load and it is programmed). Is there something special with SWD on F030 devices?
F030 works perfectly over ST-link utility (I use ST-link programmer - tried v1 and v2 result is the same), I can download compiled binary and my program works, but I need also to debug.
I use Atollic GDB server which crashes when I send “monitor reset halt” command.
When I use OpenOCD I get luckily more information, see below.
monitor reset halt
==========
OpenOCD:
C:\Users\mhubacek\Downloads\openocd-0.8.0\openocd-0.8.0\bin>openocd -f stm32f0di
scovery.cfg
Open On-Chip Debugger 0.8.0 (2014-04-28-08:39)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.sourceforge.net/doc/doxygen/bugs.html
srst_only separate srst_nogate srst_open_drain connect_deassert_srst
Info : This adapter doesn't support configurable speed
Info : STLINK v2 JTAG v14 API v2 SWIM v0 VID 0x0483 PID 0x3748
Info : using stlink api v2
Info : Target voltage: 2.929224
Info : stm32f0x.cpu: hardware has 4 breakpoints, 2 watchpoints
Info : accepting 'gdb' connection from 3333
Info : device id = 0x10006444
Info : flash size = 32kbytes
Error: timed out while waiting for target halted
TARGET: stm32f0x.cpu - Not halted
in procedure 'reset'
GDB client:
C:\kepler\workspace\stm32f0_sb9\Debug>arm-none-eabi-gdb
GNU gdb (GDB) 7.2.50.20100908-cvs
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=i686-mingw32 --target=arm-none-eabi".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
(gdb) target remote localhost:3333
Remote debugging using localhost:3333
0x08001d4e in ?? ()
(gdb) monitor reset halt
timed out while waiting for target halted
TARGET: stm32f0x.cpu - Not halted
in procedure 'reset'
(gdb)
So it seems that I am not able to reset the core, if I download my code with ST-link and then use command “monitor halt”, the application really halts. So I thougt that maybe if I dont use reset command…
monitor halt
load
=====
OpenOCD
For bug reports, read
http://openocd.sourceforge.net/doc/doxygen/bugs.html
srst_only separate srst_nogate srst_open_drain connect_deassert_srst
Info : This adapter doesn't support configurable speed
Info : STLINK v2 JTAG v14 API v2 SWIM v0 VID 0x0483 PID 0x3748
Info : using stlink api v2
Info : Target voltage: 2.940605
Info : stm32f0x.cpu: hardware has 4 breakpoints, 2 watchpoints
Info : accepting 'gdb' connection from 3333
Info : device id = 0x10006444
Info : flash size = 32kbytes
undefined debug reason 7 - target needs reset
target state: halted
target halted due to debug-request, current mode: Thread
xPSR: 0x21000000 pc: 0x080018e0 msp: 0x20000fc0
Error: timed out while waiting for target halted
TARGET: stm32f0x.cpu - Not halted
in procedure 'reset'
Error: Target not halted
Error: failed erasing sectors 0 to 7
Error: flash_erase returned -304
GDB
(gdb) monitor halt
target state: halted
target halted due to debug-request, current mode: Thread
xPSR: 0x21000000 pc: 0x080018e0 msp: 0x20000fc0
(gdb) load stm32f0
stm32f0.map stm32f0_sb9.elf stm32f0_sb9.map
(gdb) load stm32f0_sb9.elf
Error erasing flash with vFlashErase packet
(gdb)
When I use load, it seems that the target is not halted. At this point I have no idea what can be wrong. Is there something special in F030?
Hardware watchdog? If I open ST-link utility the all checkboxes are checked (factory default) which tells me that watchdog has to be turned on by software, I down use watchdog in my app.
My board uses F030 without external crystal, BOOT0 is grounded (same as with F05x on my discovery board which works)