From: Øyvind Harboe <oyvind.harboe@zylin.com>
Date: Fri, 15 Jul 2011 10:05:37 +0000 (+0200)
Subject: stm32f2xxx: comments about frequency choice
X-Git-Tag: v0.5.0~19
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=e7269e32a7390e0f17817bc340d50e0cf4d0e9e0;p=openocd

stm32f2xxx: comments about frequency choice
---

diff --git a/jimtcl b/jimtcl
index 411e92fe..60dfb023 160000
--- a/jimtcl
+++ b/jimtcl
@@ -1 +1 @@
-Subproject commit 411e92fea9621630eb350e0c2bb43543e553b84f
+Subproject commit 60dfb023c4afa95047e0fa8db49830ccb46446b2
diff --git a/tcl/target/stm32f2xxx.cfg b/tcl/target/stm32f2xxx.cfg
index 9ebc00f3..8a857244 100644
--- a/tcl/target/stm32f2xxx.cfg
+++ b/tcl/target/stm32f2xxx.cfg
@@ -21,6 +21,11 @@ if { [info exists WORKAREASIZE] } {
 }
 
 # JTAG speed should be <= F_CPU/6. F_CPU after reset is 8MHz, so use F_JTAG = 1MHz
+#
+# Since we may be running of an RC oscilator, we crank down the speed a
+# bit more to be on the safe side. Perhaps superstition, but if are
+# running off a crystal, we can run closer to the limit. Note
+# that there can be a pretty wide band where things are more or less stable.
 jtag_khz 1000
 
 jtag_nsrst_delay 100