# global variable MY_FLASH_ENABLED is used to controll whether gdb flashing
# capabilites are enabled; defaults to disabled, to enable run openocd as:
#
#    openocd -c "set MY_FLASH_ENABLED 1" -f openocd.cfg
#
# NB: the set command must preceed the the sourcing of this cfg file
#
# (To flash from gdb the server must supply gdb with a memory map; in order to
# carry out the necessary flash probe to obtain this, the target must be halted
# first).

# set the default value for MY_FLASH_ENABLED
if { ![info exists MY_FLASH_ENABLED] } {
    set MY_FLASH_ENABLED 0
}

# these have to be called before init
if { $MY_FLASH_ENABLED } {
    echo "Enabling GDB memory map and flash program"
    gdb_memory_map enable
    gdb_flash_program enable
} else {
    echo "Disabling GDB memory map and flash program"
    gdb_memory_map disable
    gdb_flash_program disable
}

source [find interface/jlink.cfg]
# 100k seems to be necessary to get things going, we increase it later
adapter_khz 100

source [find board/twr-k60n512.cfg]
#source [find board/kwikstik.cfg]

# handler for the gdb-attach event; halts the target if flashing was enabled
# ups the jtag speed
proc my_gdb_attach_proc { } {
    global MY_FLASH_ENABLED

    if { $MY_FLASH_ENABLED } {
	echo "Reset so we can probe memory map ..."
	reset halt
    } else {
	echo "GDB attached; flash capability disabled."
    }

    echo "Setting jtag speed to 4MHz"
    adapter_khz 4000
}

$_TARGETNAME configure -event gdb-attach my_gdb_attach_proc