diff options
| author | Spencer Oliver <spen@spen-soft.co.uk> | 2012-05-01 14:00:27 +0100 |
|---|---|---|
| committer | Spencer Oliver <spen@spen-soft.co.uk> | 2012-05-14 09:31:45 +0000 |
| commit | d469c686d9c4aaef7dc0ff8376142b8fdd6d1dbd (patch) | |
| tree | 018079269902f5217395e565764a5b087c03c177 /src/target/stm32_stlink.c | |
| parent | 6637cf9229c741f2a1e6a7d153895c33c1646e2d (diff) | |
stlink: support connecting under reset
Some targets support connecting while the target's srst is asserted.
Tested on stm32 family.
Change-Id: I1197dd721a1e1cbf95ee77dfd8e1082b165b22a9
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/607
Tested-by: jenkins
Diffstat (limited to 'src/target/stm32_stlink.c')
| -rw-r--r-- | src/target/stm32_stlink.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/target/stm32_stlink.c b/src/target/stm32_stlink.c index f9daa014..4044654c 100644 --- a/src/target/stm32_stlink.c +++ b/src/target/stm32_stlink.c @@ -406,7 +406,7 @@ static int stm32_stlink_poll(struct target *target) static int stm32_stlink_assert_reset(struct target *target) { - int res; + int res = ERROR_OK; struct stlink_interface_s *stlink_if = target_to_stlink(target); struct armv7m_common *armv7m = target_to_armv7m(target); bool use_srst_fallback = true; @@ -415,12 +415,22 @@ static int stm32_stlink_assert_reset(struct target *target) enum reset_types jtag_reset_config = jtag_get_reset_config(); + bool srst_asserted = false; + + if (jtag_reset_config & RESET_SRST_NO_GATING) { + jtag_add_reset(0, 1); + res = stlink_if->layout->api->assert_srst(stlink_if->fd, 0); + srst_asserted = true; + } + stlink_if->layout->api->write_debug_reg(stlink_if->fd, DCB_DHCSR, DBGKEY|C_DEBUGEN); stlink_if->layout->api->write_debug_reg(stlink_if->fd, DCB_DEMCR, VC_CORERESET); if (jtag_reset_config & RESET_HAS_SRST) { - jtag_add_reset(0, 1); - res = stlink_if->layout->api->assert_srst(stlink_if->fd, 0); + if (!srst_asserted) { + jtag_add_reset(0, 1); + res = stlink_if->layout->api->assert_srst(stlink_if->fd, 0); + } if (res == ERROR_COMMAND_NOTFOUND) LOG_ERROR("Hardware srst not supported, falling back to software reset"); else if (res == ERROR_OK) { |