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# SPDX-License-Identifier: GPL-2.0-or-later
# script for stm32wbx family
#
# stm32wb devices support both JTAG and SWD transports.
#
source [find target/swj-dp.tcl]
source [find mem_helper.tcl]
if { [info exists CHIPNAME] } {
set _CHIPNAME $CHIPNAME
} else {
set _CHIPNAME stm32wbx
}
set _ENDIAN little
# Work-area is a space in RAM used for flash programming
# By default use 64kB
if { [info exists WORKAREASIZE] } {
set _WORKAREASIZE $WORKAREASIZE
} else {
set _WORKAREASIZE 0x10000
}
#jtag scan chain
if { [info exists CPUTAPID] } {
set _CPUTAPID $CPUTAPID
} else {
if { [using_jtag] } {
set _CPUTAPID 0x6ba00477
} else {
# SWD IDCODE (single drop, arm)
set _CPUTAPID 0x6ba02477
}
}
swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
if {[using_jtag]} {
jtag newtap $_CHIPNAME bs -irlen 5
}
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_m -endian $_ENDIAN -dap $_CHIPNAME.dap
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
flash bank $_CHIPNAME.flash stm32l4x 0x08000000 0 0 0 $_TARGETNAME
flash bank $_CHIPNAME.otp stm32l4x 0x1fff7000 0 0 0 $_TARGETNAME
# Common knowledges tells JTAG speed should be <= F_CPU/6.
# F_CPU after reset is MSI 4MHz, so use F_JTAG = 500 kHz to stay on
# the safe side.
#
# Note that there is a pretty wide band where things are
# more or less stable, see http://openocd.zylin.com/#/c/3366/
adapter speed 500
adapter srst delay 100
if {[using_jtag]} {
jtag_ntrst_delay 100
}
reset_config srst_nogate
if {![using_hla]} {
# if srst is not fitted use SYSRESETREQ to
# perform a soft reset
cortex_m reset_config sysresetreq
}
$_TARGETNAME configure -event reset-init {
# CPU comes out of reset with MSI_ON | MSI_RDY | MSI Range 4 MHz.
# Configure system to use MSI 24 MHz clock, compliant with VOS default Range1.
# 2 WS compliant with VOS=Range1 and 24 MHz.
mmw 0x58004000 0x00000102 0 ;# FLASH_ACR |= PRFTBE | 2(Latency)
mmw 0x58000000 0x00000091 0 ;# RCC_CR = MSI_ON | MSI Range 24 MHz
# Boost JTAG frequency
adapter speed 4000
}
$_TARGETNAME configure -event reset-start {
# Reset clock is MSI (4 MHz)
adapter speed 500
}
$_TARGETNAME configure -event examine-end {
# Enable debug during low power modes (uses more power)
# DBGMCU_CR |= DBG_STANDBY | DBG_STOP | DBG_SLEEP
mmw 0xE0042004 0x00000007 0
# Stop watchdog counters during halt
# DBGMCU_APB1_FZR1 |= DBG_IWDG_STOP | DBG_WWDG_STOP
mmw 0xE004203C 0x00001800 0
}
$_TARGETNAME configure -event trace-config {
# Set TRACE_IOEN; TRACE_MODE is set to async; when using sync
# change this value accordingly to configure trace pins
# assignment
mmw 0xE0042004 0x00000020 0
}
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