diff options
| -rw-r--r-- | src/target/cortex_m.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/target/cortex_m.c b/src/target/cortex_m.c index 74505a85..81d6ccf4 100644 --- a/src/target/cortex_m.c +++ b/src/target/cortex_m.c @@ -973,6 +973,14 @@ static int cortex_m3_assert_reset(struct target *target) return retval; } + /* If the processor is sleeping in a WFI or WFE instruction, the + * C_HALT bit must be asserted to regain control */ + if (cortex_m3->dcb_dhcsr & S_SLEEP) { + retval = mem_ap_write_u32(swjdp, DCB_DHCSR, DBGKEY | C_HALT | C_DEBUGEN); + if (retval != ERROR_OK) + return retval; + } + retval = mem_ap_write_u32(swjdp, DCB_DCRDR, 0); if (retval != ERROR_OK) return retval; |