diff options
Diffstat (limited to 'src/flash/nor/at91samd.c')
| -rw-r--r-- | src/flash/nor/at91samd.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/flash/nor/at91samd.c b/src/flash/nor/at91samd.c index 58b367ab..cdc43b8b 100644 --- a/src/flash/nor/at91samd.c +++ b/src/flash/nor/at91samd.c @@ -1018,10 +1018,15 @@ COMMAND_HANDLER(samd_handle_bootloader_command) COMMAND_HANDLER(samd_handle_reset_deassert) { struct target *target = get_current_target(CMD_CTX); - struct armv7m_common *armv7m = target_to_armv7m(target); int retval = ERROR_OK; enum reset_types jtag_reset_config = jtag_get_reset_config(); + /* If the target has been unresponsive before, try to re-establish + * communication now - CPU is held in reset by DSU, DAP is working */ + if (!target_was_examined(target)) + target_examine_one(target); + target_poll(target); + /* In case of sysresetreq, debug retains state set in cortex_m_assert_reset() * so we just release reset held by DSU * @@ -1030,9 +1035,9 @@ COMMAND_HANDLER(samd_handle_reset_deassert) * After vectreset DSU release is not needed however makes no harm */ if (target->reset_halt && (jtag_reset_config & RESET_HAS_SRST)) { - retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DHCSR, DBGKEY | C_HALT | C_DEBUGEN); + retval = target_write_u32(target, DCB_DHCSR, DBGKEY | C_HALT | C_DEBUGEN); if (retval == ERROR_OK) - retval = mem_ap_write_u32(armv7m->debug_ap, DCB_DEMCR, + retval = target_write_u32(target, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET); /* do not return on error here, releasing DSU reset is more important */ } |