STM32F4 Discovery board, in Debian Jessie

其實是follow : http://www.wolinlabs.com/blog/linux.stm32.discovery.gcc.html

結果：

啟動 stlink/st-util 時出現 error

2015-03-02T14:22:33 WARN src/stlink-usb.c: Error -3 (Permission denied) opening ST-Link/V2 device 001:003

結果是因為 /etc/udev/rules.d/45-usb-stlink-v3.rules 要加GROUPE:

# STLink Device
SUBSYSTEM=="usb", ATTR{idVendor}=="0483", ATTR{idProduct}=="3748", MODE="0666",GROUP="plugdev"

還有..

啟動 gdb 後..出現:

warning: File "/home/charles-chang/teatime/discovery/stm32_discovery_arm_gcc/blinky/.gdbinit" auto-loading has been declined
 by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load".
To enable execution of this file add
 add-auto-load-safe-path /home/charles-chang/teatime/discovery/stm32_discovery_arm_gcc/blinky/.gdbinit
line to your configuration file "/home/charles-chang/.gdbinit".
To completely disable this security protection add
 set auto-load safe-path /
line to your configuration file "/home/charles-chang/.gdbinit".

所以就 follow instruction, 在 home 下 create file: ~/.gdbinit

set auto-load safe-path /

就可以 auto-load.

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然後是 ref: http://www.wolinlabs.com/blog/stm32f4.semihosting.html

這部份比較沒問題，就照著做，download & build openocd,
semihosting 的 example 在上面就已經download 好了 (git)
所以只要 build 就可以。

然後啟動 openocd, 再啟動 gdb,
semihosting 的 output 會顯示在 openocd 那一端。

* 有點問題的是，進 semihosting 後，用 回 stlink 好像有點問題。最後解決的方法是 nb 重開機..@_@