# TI/Luminary Stellaris LM3S chip family
+# Some devices have errata in returning their device class.
+# DEVICECLASS is provided as a manual override
+# Manual setting of a device class of 0xff is not allowed
+
+global _DEVICECLASS
+
+if { [info exists DEVICECLASS] } {
+ set _DEVICECLASS $DEVICECLASS
+} else {
+ set _DEVICECLASS 0xff
+}
+
+# Luminary chips support both JTAG and SWD transports.
+# Adapt based on what transport is active.
+source [find target/swj-dp.tcl]
+
+# For now we ignore the SPI and UART options, which
+# are usable only for ISP style initial flash programming.
+
if { [info exists CHIPNAME] } {
- set _CHIPNAME $CHIPNAME
+ set _CHIPNAME $CHIPNAME
} else {
- set _CHIPNAME lm3s
+ 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)
+# CPU TAP ID 0x4ba00477 for Cortex-M3 r2p0 (on Tempest, Firestorm)
+# CPU TAP ID 0x4ba00477 for Cortex-M4 r0p1 (on Blizzard)
# ... we'll ignore the JTAG version field, rather than list every
# chip revision that turns up.
-if { [info exists CPUTAPID ] } {
+if { [info exists CPUTAPID] } {
set _CPUTAPID $CPUTAPID
} else {
set _CPUTAPID 0x0ba00477
}
-jtag newtap $_CHIPNAME cpu -irlen 4 -irmask 0xf \
- -expected-id $_CPUTAPID -ignore-version
+# SWD DAP, and JTAG TAP, take same params for now;
+# ... even though SWD ignores all except TAPID, and
+# JTAG shouldn't need anything more then irlen. (and TAPID).
+swj_newdap $_CHIPNAME cpu -irlen 4 -irmask 0xf \
+ -expected-id $_CPUTAPID -ignore-version
+
+if { [info exists WORKAREASIZE] } {
+ set _WORKAREASIZE $WORKAREASIZE
+} else {
+ # default to 2K working area
+ set _WORKAREASIZE 0x800
+}
-# 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
+target create $_TARGETNAME cortex_m -chain-position $_CHIPNAME.cpu
# 8K working area at base of ram, not backed up
#
-# NOTE: you may need or want to reconfigure the work area;
+# NOTE: you may need or want to reconfigure the work area;
# some parts have just 6K, and you may want to use other
# addresses (at end of mem not beginning) or back it up.
-$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size 0x2000
+$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE
# JTAG speed ... slow enough to work with a 12 MHz RC oscillator;
# LM3S parts don't support RTCK
#
-# NOTE: this may be increased by a reset-init handler, after it
+# NOTE: this may be increased by a reset-init handler, after it
# configures and enables the PLL. Or you might need to decrease
# this, if you're using a slower clock.
adapter_khz 500
-$_TARGETNAME configure -event reset-start {adapter_khz 500}
+
+source [find mem_helper.tcl]
+
+proc reset_peripherals {family} {
+
+ source [find chip/ti/lm3s/lm3s.tcl]
+
+ echo "Resetting Core Peripherals"
+
+ # Disable the PLL and the system clock divider (nop if disabled)
+ mmw $SYSCTL_RCC 0 $SYSCTL_RCC_USESYSDIV
+ mmw $SYSCTL_RCC2 $SYSCTL_RCC2_BYPASS2 0
+
+ # RCC and RCC2 to their reset values
+ mww $SYSCTL_RCC [expr (0x078e3ad0 | ([mrw $SYSCTL_RCC] & $SYSCTL_RCC_MOSCDIS))]
+ mww $SYSCTL_RCC2 0x07806810
+ mww $SYSCTL_RCC 0x078e3ad1
+
+ # Reset the deep sleep clock configuration register
+ mww $SYSCTL_DSLPCLKCFG 0x07800000
+
+ # Reset the clock gating registers
+ mww $SYSCTL_RCGC0 0x00000040
+ mww $SYSCTL_RCGC1 0
+ mww $SYSCTL_RCGC2 0
+ mww $SYSCTL_SCGC0 0x00000040
+ mww $SYSCTL_SCGC1 0
+ mww $SYSCTL_SCGC2 0
+ mww $SYSCTL_DCGC0 0x00000040
+ mww $SYSCTL_DCGC1 0
+ mww $SYSCTL_DCGC2 0
+
+ # Reset the remaining SysCtl registers
+ mww $SYSCTL_PBORCTL 0
+ mww $SYSCTL_IMC 0
+ mww $SYSCTL_GPIOHBCTL 0
+ mww $SYSCTL_MOSCCTL 0
+ mww $SYSCTL_PIOSCCAL 0
+ mww $SYSCTL_I2SMCLKCFG 0
+
+ # Reset the peripherals
+ mww $SYSCTL_SRCR0 0xffffffff
+ mww $SYSCTL_SRCR1 0xffffffff
+ mww $SYSCTL_SRCR2 0xffffffff
+ mww $SYSCTL_SRCR0 0
+ mww $SYSCTL_SRCR1 0
+ mww $SYSCTL_SRCR2 0
+
+ # Clear any pending SysCtl interrupts
+ mww $SYSCTL_MISC 0xffffffff
+
+ # Wait for any pending flash operations to complete
+ while {[expr [mrw $FLASH_FMC] & 0xffff] != 0} { sleep 1 }
+ while {[expr [mrw $FLASH_FMC2] & 0xffff] != 0} { sleep 1 }
+
+ # Reset the flash controller registers
+ mww $FLASH_FMA 0
+ mww $FLASH_FCIM 0
+ mww $FLASH_FCMISC 0xffffffff
+ mww $FLASH_FWBVAL 0
+}
+
+$_TARGETNAME configure -event reset-start {
+ adapter_khz 500
+
+ #
+ # When nRST is asserted on most Stellaris devices, it clears some of
+ # the debug state. The ARMv7M and Cortex-M3 TRMs say that's wrong;
+ # and OpenOCD depends on those TRMs. So we won't use SRST on those
+ # chips. (Only power-on reset should affect debug state, beyond a
+ # few specified bits; not the chip's nRST input, wired to SRST.)
+ #
+ # REVISIT current errata specs don't seem to cover this issue.
+ # Do we have more details than this email?
+ # https://lists.berlios.de/pipermail
+ # /openocd-development/2008-August/003065.html
+ #
+
+ global _DEVICECLASS
+
+ if {$_DEVICECLASS != 0xff} {
+ set device_class $_DEVICECLASS
+ } else {
+ set device_class [expr (([mrw 0x400fe000] >> 16) & 0xff)]
+ }
+
+ if {$device_class == 0 || $device_class == 1 ||
+ $device_class == 3 || $device_class == 5 || $device_class == 0xa} {
+ if {![using_hla]} {
+ # Sandstorm, Fury, DustDevil, Blizzard and Snowflake are able to use NVIC SYSRESETREQ
+ cortex_m reset_config sysresetreq
+ }
+ } else {
+ if {![using_hla]} {
+ # Tempest and Firestorm default to using NVIC VECTRESET
+ # peripherals will need reseting manually, see proc reset_peripherals
+ cortex_m reset_config vectreset
+ }
+ # reset peripherals, based on code in
+ # http://www.ti.com/lit/er/spmz573a/spmz573a.pdf
+ reset_peripherals $device_class
+ }
+}
# flash configuration ... autodetects sizes, autoprobed
flash bank $_CHIPNAME.flash stellaris 0 0 0 0 $_TARGETNAME
-
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