diff options
| -rw-r--r-- | src/target/cortex_m.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/target/cortex_m.c b/src/target/cortex_m.c index e540f85..d9bee0e 100644 --- a/src/target/cortex_m.c +++ b/src/target/cortex_m.c @@ -2230,6 +2230,19 @@ int cortex_m_examine(struct target *target) armv7m->debug_ap->tar_autoincr_block = (1 << 10); } + /* Enable debug requests */ + retval = target_read_u32(target, DCB_DHCSR, &cortex_m->dcb_dhcsr); + if (retval != ERROR_OK) + return retval; + if (!(cortex_m->dcb_dhcsr & C_DEBUGEN)) { + uint32_t dhcsr = (cortex_m->dcb_dhcsr | C_DEBUGEN) & ~(C_HALT | C_STEP | C_MASKINTS); + + retval = target_write_u32(target, DCB_DHCSR, DBGKEY | (dhcsr & 0x0000FFFFUL)); + if (retval != ERROR_OK) + return retval; + cortex_m->dcb_dhcsr = dhcsr; + } + /* Configure trace modules */ retval = target_write_u32(target, DCB_DEMCR, TRCENA | armv7m->demcr); if (retval != ERROR_OK) |