---
** [tickets:#366] Cannot Connect to A53 Core of AM65x_GP_EVM**
**Status:** new
**Milestone:** 0.11.0
**Created:** Tue Oct 04, 2022 12:21 AM UTC by Ben Roytburd
**Last Updated:** Tue Oct 04, 2022 12:21 AM UTC
**Owner:** nobody
Cannot connect to A53 core of the AM65x_GP_EVM development board using OpenOCD,
GDB, and XDS110 debugger.
In I am using OpenOCD version 0.12.0-rc1 to try and connect to the AM65x_GP_EVM
platform (am6548). When I try to connect over GDB I get the following error
(3334 is the A53_0 core):
~~~
(gdb) target extended-remote localhost:3334
Remote debugging using localhost:3334
Remote connection closed
(gdb)
~~~
I started OpenOCD using the command: `openocd -d -f "C:\Program Files
(x86)\openocd-v0.12.0-rc1-i686-w64-mingw32\share\openocd\scripts\board\ti_am654evm.cfg"
-c "gdb_breakpoint_override hard"`
Here is the OpenOCD log after I enter that target extended-remote command:
~~~
Info : 259 23165 server.c:90 add_connection(): accepting 'gdb' connection on
tcp/3334
Debug: 260 23190 breakpoints.c:363 breakpoint_clear_target_internal(): Delete
all breakpoints for target: am654.cpu.a53.0
Debug: 261 23233 breakpoints.c:543 watchpoint_clear_target(): Delete all
watchpoints for target: am654.cpu.a53.0
Debug: 262 23242 target.c:1845 target_call_event_callbacks(): target event 22
(gdb-attach) for core am654.cpu.a53.0
Debug: 263 23248 target.c:5093 target_handle_event(): target(1):
am654.cpu.a53.0 (aarch64) event: 22 (gdb-attach) action:
_cpu_no_smp_up
# gdb-attach default rule
halt 1000
Debug: 264 23253 command.c:155 script_debug(): command - target current
Debug: 265 23256 command.c:155 script_debug(): command - am654.cpu.a53.0 cget
-type
Debug: 266 23259 command.c:155 script_debug(): command - am654.cpu.a53.0
arp_examine
Debug: 267 23262 arm_adi_v5.c:1095 dap_get_ap(): refcount AP#0x0 get 1
Debug: 268 23265 arm_adi_v5.c:1120 dap_put_ap(): refcount AP#0x0 put 0
Debug: 269 23266 arm_adi_v5.c:1095 dap_get_ap(): refcount AP#0x1 get 7
Debug: 270 23269 arm_adi_v5.c:1040 dap_find_get_ap(): Found MEM-AP APB2 or APB3
at AP index: 1 (IDR=0x54770002)
Debug: 271 23274 arm_adi_v5.c:826 mem_ap_init(): MEM_AP Packed Transfers:
disabled
Debug: 272 23278 arm_adi_v5.c:837 mem_ap_init(): MEM_AP CFG: large data 0, long
address 0, big-endian 0
Debug: 273 23281 adi_v5_jtag.c:651 jtagdp_transaction_endcheck(): jtag-dp:
CTRL/STAT 0xf0000021
Error: 274 23283 adi_v5_jtag.c:662 jtagdp_transaction_endcheck(): JTAG-DP
STICKY ERROR
Debug: 275 23286 aarch64.c:2591 aarch64_examine_first(): Examine oslock failed
User : 276 23289 target.c:5118 target_handle_event(): Error executing event
gdb-attach on target am654.cpu.a53.0:
C:/Program Files
(x86)/openocd-v0.12.0-rc1-i686-w64-mingw32/bin/../share/openocd/scripts/target/ti_k3.cfg:198:
Error:
in procedure '_cpu_no_smp_up' called at file "C:/Program Files
(x86)/openocd-v0.12.0-rc1-i686-w64-mingw32/bin/../share/openocd/scripts/target/ti_k3.cfg",
line 226
at file "C:/Program Files
(x86)/openocd-v0.12.0-rc1-i686-w64-mingw32/bin/../share/openocd/scripts/target/ti_k3.cfg",
line 198
Info : 277 23305 gdb_server.c:1070 gdb_new_connection(): New GDB Connection: 1,
Target am654.cpu.a53.0, state: examine deferred
Error: 278 23309 gdb_server.c:1078 gdb_new_connection(): Target am654.cpu.a53.0
not examined yet, refuse gdb connection 1!
Error: 279 23313 server.c:94 add_connection(): attempted 'gdb' connection
rejected
~~~
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