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target/cortex_m: fix cortex_m reset_config help and check for syntax error 

Remove option 'srst' which is not recognized from on-line help and texi.
Check parameter and return syntax error if wrong option is entered.

Change-Id: I87daa423a9f53193a0b015080594820b933628f5
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/4795
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
log_output
Tomas Vanek 2018-12-07 17:51:49 +01:00
parent cb5c6477f5
commit 936dc7cbd9
2 changed files with 11 additions and 8 deletions
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13
doc/openocd.texi
View File

@ -3458,6 +3458,7 @@ How long (in milliseconds) OpenOCD should wait after deasserting
nTRST (active-low JTAG TAP reset) before starting new JTAG operations.
@end deffn
@anchor {reset_config}
@deffn {Command} reset_config mode_flag ...
This command displays or modifies the reset configuration
of your combination of JTAG board and target in target
@ -8994,13 +8995,13 @@ must also be explicitly enabled.
This finishes by listing the current vector catch configuration.
@end deffn
@deffn Command {cortex_m reset_config} (@option{srst}|@option{sysresetreq}|@option{vectreset})
Control reset handling. The default @option{srst} is to use srst if fitted,
otherwise fallback to @option{vectreset}.
@deffn Command {cortex_m reset_config} (@option{sysresetreq}|@option{vectreset})
Control reset handling if hardware srst is not fitted
@xref{reset_config,,reset_config}.
@itemize @minus
@item @option{srst} use hardware srst if fitted otherwise fallback to @option{vectreset}.
@item @option{sysresetreq} use NVIC SYSRESETREQ to reset system.
@item @option{vectreset} use NVIC VECTRESET to reset system.
@item @option{sysresetreq} use AIRCR SYSRESETREQ to reset system.
@item @option{vectreset} use AIRCR VECTRESET to reset system (default).
@end itemize
Using @option{vectreset} is a safe option for Cortex-M3, M4 and M7 cores.

6
src/target/cortex_m.c
View File

@ -2436,7 +2436,9 @@ COMMAND_HANDLER(handle_cortex_m_reset_config_command)
LOG_WARNING("VECTRESET is not supported on your Cortex-M core!");
else
cortex_m->soft_reset_config = CORTEX_M_RESET_VECTRESET;
}
} else
return ERROR_COMMAND_SYNTAX_ERROR;
}
switch (cortex_m->soft_reset_config) {
@ -2478,7 +2480,7 @@ static const struct command_registration cortex_m_exec_command_handlers[] = {
.handler = handle_cortex_m_reset_config_command,
.mode = COMMAND_ANY,
.help = "configure software reset handling",
.usage = "['srst'|'sysresetreq'|'vectreset']",
.usage = "['sysresetreq'|'vectreset']",
},
COMMAND_REGISTRATION_DONE
};