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authorØyvind Harboe <oyvind.harboe@zylin.com>2011-03-03 09:14:30 +0100
committerØyvind Harboe <oyvind.harboe@zylin.com>2011-03-15 10:36:16 +0100
commitbb0d11cba989832c0f27c2e5b664bfdc26b98cc9 (patch)
tree6604069fb5a948d67e6afbc86b84fee6f56fdb43
parent689c244389798ef7fc041693831ae114b3063d36 (diff)
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jtag: clean up jtag_sleep, handle short sleeps correctly via usleep
short sleeps are handled via usleep, longer sleeps we round up to nearest ms. There was a bug in jtag_sleep() in that it would round *down* to nearest ms, thus making all <1ms sleeps 0. Found by inspection rather than symptom. Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
-rw-r--r--src/jtag/core.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/src/jtag/core.c b/src/jtag/core.c
index d7e1ccec..68c12570 100644
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -871,9 +871,16 @@ static int jtag_reset_callback(enum jtag_event event, void *priv)
return ERROR_OK;
}
+/* sleep at least us microseconds. When we sleep more than 1000ms we
+ * do an alive sleep, i.e. keep GDB alive. Note that we could starve
+ * GDB if we slept for <1000ms many times.
+ */
void jtag_sleep(uint32_t us)
{
- alive_sleep(us/1000);
+ if (us < 1000)
+ usleep(us);
+ else
+ alive_sleep((us+999)/1000);
}
/* Maximum number of enabled JTAG devices we expect in the scan chain,