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# TI/Luminary Stellaris LM3S chip family
if { [info exists CHIPNAME] } {
set _CHIPNAME $CHIPNAME
} else {
set _CHIPNAME lm3s
}
# CPU TAP ID 0x1ba00477 for early Sandstorm parts
# CPU TAP ID 0x2ba00477 for later SandStorm parts, e.g. lm3s811 Rev C2
# CPU TAP ID 0x3ba00477 for Cortex-M3 r1p2 (on Fury, DustDevil)
# CPU TAP ID 0x4ba00477 for Cortex-M3 r2p0 (on Tempest)
# ... we'll ignore the JTAG version field, rather than list every
# chip revision that turns up.
if { [info exists CPUTAPID ] } {
set _CPUTAPID $CPUTAPID
} else {
set _CPUTAPID 0x0ba00477
}
jtag newtap $_CHIPNAME cpu -irlen 4 -irmask 0xf \
-expected-id $_CPUTAPID -ignore-version
# The "lm3s" variant uses a software reset rather than SRST.
# This stops the debug registers from being cleared; it works
# around an erratum which should be fixed in later silicon.
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_m3 -chain-position $_CHIPNAME.cpu \
-variant lm3s
# 8K working area at base of ram, not backed up
#
# NOTE: you may need or want to reconfigure the work area;
# some parts have just 6K, and you may want to use other
# addresses (at end of mem not beginning) or back it up.
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size 0x2000
# JTAG speed ... slow enough to work with a 12 MHz RC oscillator;
# LM3S parts don't support RTCK
#
# NOTE: this may be increased by a reset-init handler, after it
# configures and enables the PLL. Or you might need to decrease
# this, if you're using a slower clock.
jtag_khz 500
$_TARGETNAME configure -event reset-start {jtag_khz 500}
# flash configuration ... autodetects sizes, autoprobed
flash bank $_CHIPNAME.flash stellaris 0 0 0 0 $_TARGETNAME
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