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disable continous polling while srst is asserted and power dropout is detected

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git-svn-id: svn://svn.berlios.de/openocd/trunk@1134 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
oharboe
2008-11-05 07:45:31 +00:00
parent 4ad68fb6d6
commit bbafcb3758
5 changed files with 436 additions and 370 deletions
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70
src/target/target.c
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@@ -1447,6 +1447,71 @@ int handle_working_area_command(struct command_context_s *cmd_ctx, char *cmd, ch
}
// every 300ms we check for reset & powerdropout and issue a "reset halt" if
// so.
static int powerDropout;
static int srstAsserted;
static int sense_handler()
{
static int prevSrstAsserted = 0;
static int prevPowerdropout = 0;
int retval;
if ((retval=jtag_power_dropout(&powerDropout))!=ERROR_OK)
return retval;
int powerRestored;
powerRestored = prevPowerdropout && !powerDropout;
if (powerRestored)
{
LOG_USER("Sensed power restore.");
}
long long current = timeval_ms();
static long long lastPower = 0;
int waitMore = lastPower + 2000 > current;
if (powerDropout && !waitMore)
{
LOG_USER("Sensed power dropout.");
lastPower = current;
}
if ((retval=jtag_srst_asserted(&srstAsserted))!=ERROR_OK)
return retval;
int srstDeasserted;
srstDeasserted = prevSrstAsserted && !srstAsserted;
static long long lastSrst = 0;
waitMore = lastSrst + 2000 > current;
if (srstDeasserted && !waitMore)
{
LOG_USER("Sensed nSRST deasserted");
lastSrst = current;
}
if (!prevSrstAsserted && srstAsserted)
{
LOG_USER("Sensed nSRST asserted");
}
prevSrstAsserted = srstAsserted;
prevPowerdropout = powerDropout;
if (srstDeasserted || powerRestored)
{
/* Other than logging the event we can't do anything here.
* Issuing a reset is a particularly bad idea as we might
* be inside a reset already.
*/
}
return ERROR_OK;
}
/* process target state changes */
int handle_target(void *priv)
{
@@ -1455,7 +1520,10 @@ int handle_target(void *priv)
while (target)
{
if (target_continous_poll)
sense_handler();
/* only poll target if we've got power and srst isn't asserted */
if (target_continous_poll&&!powerDropout&&!srstAsserted)
{
/* polling may fail silently until the target has been examined */
if((retval = target_poll(target)) != ERROR_OK)