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
static int stm32_stlink_assert_reset(struct target *target)
{
static int stm32_stlink_assert_reset(struct target *target)
{
struct stlink_interface_s *stlink_if = target_to_stlink(target);
struct armv7m_common *armv7m = target_to_armv7m(target);
bool use_srst_fallback = true;
struct stlink_interface_s *stlink_if = target_to_stlink(target);
struct armv7m_common *armv7m = target_to_armv7m(target);
bool use_srst_fallback = true;
enum reset_types jtag_reset_config = jtag_get_reset_config();
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) {
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) {
if (res == ERROR_COMMAND_NOTFOUND)
LOG_ERROR("Hardware srst not supported, falling back to software reset");
else if (res == ERROR_OK) {
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