On Thursday 03 December 2009, Øyvind Harboe wrote:
> Error: The 'init' command must be used before 'init'.
> Command handler execution failed
> Warn : jtag initialization failed; try 'jtag init' again.
Yeah, everything seems to cause JTAG init to fail lately.
One issue seems to be:
==================
Not clear *why* this is happening all of a sudden, but
JTAG initialization seems to be bypassing the code
which forced the adapter to set TRST and SRST status
to zero/inactive.
On a TRST-less board, TRST is getting left as "-1"
indicating never-initialized, so tests relying on
it being only zero or one (i.e. everything after
the initialization code that's now bypassed) fail.
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -153,7 +153,7 @@ bool is_jtag_poll_safe(void)
* It is also implicitly disabled while TRST is active and
* while SRST is gating the JTAG clock.
*/
- if (!jtag_poll || jtag_trst != 0)
+ if (!jtag_poll || jtag_trst == 1)
return false;
return jtag_srst == 0 || (jtag_reset_config & RESET_SRST_NO_GATING);
}
@@ -347,7 +347,7 @@ int jtag_call_event_callbacks(enum jtag_event event)
static void jtag_checks(void)
{
- assert(jtag_trst == 0);
+ assert(jtag_trst != 1);
}
static void jtag_prelude(tap_state_t state)
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