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execute reset init upon power restore / srst deassert 

git-svn-id: svn://svn.berlios.de/openocd/trunk@1150 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
oharboe 2008-11-10 10:16:13 +00:00
parent 0bbe570882
commit 3de3de0b37
2 changed files with 79 additions and 5 deletions
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20
src/helper/startup.tcl
View File

@ -327,3 +327,23 @@ proc cpu {args} {
}
}
proc power_restore {} {
puts "Sensed power restore."
reset init
}
add_help_text power_restore "Overridable procedure run when power restore is detected. Runs 'reset init' by default."
proc power_dropout {} {
puts "Sensed power dropout."
}
proc srst_deasserted {} {
puts "Sensed nSRST deasserted."
reset init
}
add_help_text srst_deasserted "Overridable procedure run when srst deassert is detected. Runs 'reset init' by default."
proc srst_asserted {} {
puts "Sensed nSRST asserted."
}

64
src/target/target.c
View File

@ -1458,6 +1458,11 @@ int handle_working_area_command(struct command_context_s *cmd_ctx, char *cmd, ch
static int powerDropout;
static int srstAsserted;
static int runPowerRestore;
static int runPowerDropout;
static int runSrstAsserted;
static int runSrstDeasserted;
static int sense_handler()
{
static int prevSrstAsserted = 0;
@ -1471,7 +1476,7 @@ static int sense_handler()
powerRestored = prevPowerdropout && !powerDropout;
if (powerRestored)
{
LOG_USER("Sensed power restore.");
runPowerRestore = 1;
}
long long current = timeval_ms();
@ -1479,7 +1484,7 @@ static int sense_handler()
int waitMore = lastPower + 2000 > current;
if (powerDropout && !waitMore)
{
LOG_USER("Sensed power dropout.");
runPowerDropout = 1;
lastPower = current;
}
@ -1493,13 +1498,13 @@ static int sense_handler()
waitMore = lastSrst + 2000 > current;
if (srstDeasserted && !waitMore)
{
LOG_USER("Sensed nSRST deasserted");
runSrstDeasserted = 1;
lastSrst = current;
}
if (!prevSrstAsserted && srstAsserted)
{
LOG_USER("Sensed nSRST asserted");
runSrstAsserted = 1;
}
prevSrstAsserted = srstAsserted;
@ -1521,11 +1526,59 @@ static int sense_handler()
int handle_target(void *priv)
{
int retval = ERROR_OK;
/* we do not want to recurse here... */
static int recursive = 0;
if (! recursive)
{
recursive = 1;
sense_handler();
/* danger! running these procedures can trigger srst assertions and power dropouts.
* We need to avoid an infinite loop/recursion here and we do that by
* clearing the flags after running these events.
*/
int did_something = 0;
if (runSrstAsserted)
{
Jim_Eval( interp, "srst_asserted");
did_something = 1;
}
if (runSrstDeasserted)
{
Jim_Eval( interp, "srst_deasserted");
did_something = 1;
}
if (runPowerDropout)
{
Jim_Eval( interp, "power_dropout");
did_something = 1;
}
if (runPowerRestore)
{
Jim_Eval( interp, "power_restore");
did_something = 1;
}
if (did_something)
{
/* clear detect flags */
sense_handler();
}
/* clear action flags */
runSrstAsserted=0;
runSrstDeasserted=0;
runPowerRestore=0;
runPowerDropout=0;
recursive = 0;
}
target_t *target = all_targets;
while (target)
{
sense_handler();
/* only poll target if we've got power and srst isn't asserted */
if (target_continous_poll&&!powerDropout&&!srstAsserted)
@ -1538,6 +1591,7 @@ int handle_target(void *priv)
target = target->next;
}
return retval;
}