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tcl/target/nrf52.cfg: detect AP lock and add command to recover 

Change-Id: I8d2e29ed88a957d412473255e42b022a00dfb9cb
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/4984
Tested-by: jenkins
This commit is contained in:
Tomas Vanek 2019-03-01 13:35:31 +01:00
parent ec16e522bf
commit 73a5f58adb
1 changed files with 74 additions and 1 deletions
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75
tcl/target/nrf52.cfg
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@ -34,9 +34,82 @@ adapter speed 1000
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
if { ![using_hla] } {
if { [using_hla] } {
echo ""
echo "nRF52 device has a CTRL-AP dedicated to recover the device from AP lock."
echo "A high level adapter (like a ST-Link) you are currently using cannot access"
echo "the CTRL-AP so 'nrf52_recover' command will not work."
echo "Do not enable UICR APPROTECT."
echo ""
} else {
cortex_m reset_config sysresetreq
$_TARGETNAME configure -event examine-fail nrf52_check_ap_lock
}
flash bank $_CHIPNAME.flash nrf5 0x00000000 0 1 1 $_TARGETNAME
flash bank $_CHIPNAME.uicr nrf5 0x10001000 0 1 1 $_TARGETNAME
# Test if MEM-AP is locked by UICR APPROTECT
proc nrf52_check_ap_lock {} {
set dap [[target current] cget -dap]
set err [catch {set APPROTECTSTATUS [ocd_$dap apreg 1 0xc]}]
if {$err == 0 && $APPROTECTSTATUS != 1} {
echo "****** WARNING ******"
echo "nRF52 device has AP lock engaged (see UICR APPROTECT register)."
echo "Debug access is denied."
echo "Use 'nrf52_recover' to erase and unlock the device."
echo ""
poll off
}
}
# Mass erase and unlock the device using proprietary nRF CTRL-AP (AP #1)
# http://www.ebyte.com produces modules with nRF52 locked by default,
# use nrf52_recover to enable flashing and debug.
proc nrf52_recover {} {
set target [target current]
set dap [$target cget -dap]
set IDR [ocd_$dap apreg 1 0xfc]
if {$IDR != 0x02880000} {
echo "Error: Cannot access nRF52 CTRL-AP!"
return
}
poll off
# Assert reset
$dap apreg 1 0 1
# Reset ERASEALLSTATUS event
$dap apreg 1 8 0
# Trigger ERASEALL task
$dap apreg 1 4 0
$dap apreg 1 4 1
for {set i 0} {1} {incr i} {
set ERASEALLSTATUS [ocd_$dap apreg 1 8]
if {$ERASEALLSTATUS == 1} {
echo "$target device has been successfully erased and unlocked."
break
}
if {$i >= 5} {
echo "Error: $target recovery failed."
break
}
sleep 100
}
# Deassert reset
$dap apreg 1 0 0
if {$ERASEALLSTATUS == 1} {
sleep 100
$target arp_examine
poll on
}
}
add_help_text nrf52_recover "Mass erase and unlock nRF52 device"