diff options
| author | Ulf Samuelsson <ulf@emagii.com> | 2011-12-20 19:09:26 +0100 |
|---|---|---|
| committer | Spencer Oliver <spen@spen-soft.co.uk> | 2011-12-23 09:37:28 +0000 |
| commit | c6f44bde734a61bd90d58bf603d3d608eea5ff15 (patch) | |
| tree | b60b22ce11a003c58b1ec0ea249003a78e6e16c6 /tcl | |
| parent | 77accb2f3da7978d95c9d740ddf4d2116752788f (diff) | |
at91sam3XXX.cfg: Configure JTAG clock to 500 kHz.
This affects all configurations including target/at91sam3XXX.cfg
Change-Id: I2c1e1edf0986d30e63f109604a38bf402ded369e
Signed-off-by: Ulf Samuelsson <ulf@emagii.com>
Reviewed-on: http://openocd.zylin.com/292
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
Diffstat (limited to 'tcl')
| -rw-r--r-- | tcl/target/at91sam3XXX.cfg | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tcl/target/at91sam3XXX.cfg b/tcl/target/at91sam3XXX.cfg index a13e3990..98b508c4 100644 --- a/tcl/target/at91sam3XXX.cfg +++ b/tcl/target/at91sam3XXX.cfg @@ -29,6 +29,18 @@ if { [info exists ENDIAN] } { set _ENDIAN little } +# JTAG speed should be <= F_CPU/6. F_CPU after reset is 4 MHz, so use F_JTAG = 0.5MHz +# +# 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. + +adapter_khz 500 + +adapter_nsrst_delay 100 +jtag_ntrst_delay 100 + #jtag scan chain if { [info exists CPUTAPID] } { set _CPUTAPID $CPUTAPID |