diff options
Diffstat (limited to 'src/target/cortex_m.c')
| -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 dc8d3444..103ce502 100644 --- a/src/target/cortex_m.c +++ b/src/target/cortex_m.c @@ -1069,6 +1069,19 @@ static int cortex_m_assert_reset(struct target *target) "handler to reset any peripherals or configure hardware srst support."); } + /* + SAM4L needs to execute security initalization + startup sequence before AP access would be enabled. + During the intialization CDBGPWRUPACK is pulled low and we + need to wait for it to be set to 1 again. + */ + retval = dap_dp_poll_register(swjdp, DP_CTRL_STAT, + CDBGPWRUPACK, CDBGPWRUPACK, 100); + if (retval != ERROR_OK) { + LOG_ERROR("Failed waitnig for CDBGPWRUPACK"); + return ERROR_FAIL; + } + { /* I do not know why this is necessary, but it * fixes strange effects (step/resume cause NMI |