diff options
| author | Andreas Fritiofson <andreas.fritiofson@gmail.com> | 2014-03-07 20:08:31 +0100 |
|---|---|---|
| committer | Andreas Fritiofson <andreas.fritiofson@gmail.com> | 2014-03-07 21:19:12 +0000 |
| commit | 17fddb4289cb632a414d9780b3c2e60e368fa083 (patch) | |
| tree | 2c37b0b8dc765482c9bec0cce714208f049f7f38 /src/target/target.h | |
| parent | d82490adfbb63716361b1867e7359b656de76ac6 (diff) | |
stlink: Use callback to increase frequency of trace data sampling
The ST-LINK/V2 has limited internal buffering, such that trace data
can be missed if the target is generating data at a rate quicker than
the OpenOCD trace sampling. The issue of lost data is compounded since
individual TPIU packets may be split across individual STLINK_TRACE_EP
reads, and misleading results can occur if mid-packet loss occurs.
This patch increases the frequency of checking for pending trace data
with the aim of minimising such losses. Note: With the limited (I/O
and memory) bandwidth of the ST-LINK/V2 there cannot, however, be a
guarantee against trace data loss.
The timer callback is only added when enabling tracing, and is removed
when tracing is disabled.
Change-Id: Ibde9794b77793d3068f88cb5c1a26f9ceadcbd8a
Signed-off-by: James G. Smith <jsmith@ecoscentric.com>
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/1661
Tested-by: jenkins
Diffstat (limited to 'src/target/target.h')
| -rw-r--r-- | src/target/target.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/target/target.h b/src/target/target.h index 21b94eea..3ce164a2 100644 --- a/src/target/target.h +++ b/src/target/target.h @@ -328,7 +328,7 @@ int target_call_event_callbacks(struct target *target, enum target_event event); */ int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int periodic, void *priv); - +int target_unregister_timer_callback(int (*callback)(void *priv), void *priv); int target_call_timer_callbacks(void); /** * Invoke this to ensure that e.g. polling timer callbacks happen before |