nand_programmer

debug (J-Link)
==============
1. Start openocd server:
# cd ~/dev/nand_programmer/nand_programmer/
# openocd -f extra/openocd.cfg
2. In new terminal connect to the server using telnet:
# telnet 127.0.0.1 4444
3. Reset board:
> reset halt
4. In new terminal start GDB:
# cd ~/dev/nand_programmer/
# compiler/gcc-arm-none-eabi-4_9-2015q1/bin/arm-none-eabi-gdb nand_programmer/firmware/obj/prog.elf
5. Connect to board:
>target remote localhost:3333
> b main
> continue

debug (ST-Link)
===============
1. Start st-util: 
# LD_LIBRARY_PATH=/usr/local/lib/ st-util
2. In new terminal start gdb
# cd ~/dev/nand_programmer/
# compiler/gcc-arm-none-eabi-4_9-2015q1/bin/arm-none-eabi-gdb nand_programmer/firmware/obj/prog.elf
> tar extended-remote :4242
> load
> b main
> continue

useful commands
===============
1. Disable pagination: 
> set pagination off
2. Print on breakpoint:
> break foo if x>0
     commands
     silent
     printf "x is %d\n",x
     cont
     end