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# script for stm32f4x family
#
# stm32 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 stm32f4x
}
set _ENDIAN little
# Work-area is a space in RAM used for flash programming
# By default use 32kB (Available RAM in smallest device STM32F410)
if { [info exists WORKAREASIZE] } {
set _WORKAREASIZE $WORKAREASIZE
} else {
set _WORKAREASIZE 0x8000
}
#jtag scan chain
if { [info exists CPUTAPID] } {
set _CPUTAPID $CPUTAPID
} else {
if { [using_jtag] } {
# See STM Document RM0090
# Section 38.6.3 - corresponds to Cortex-M4 r0p1
set _CPUTAPID 0x4ba00477
} {
set _CPUTAPID 0x2ba01477
}
}
swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
if {[using_jtag]} {
jtag newtap $_CHIPNAME bs -irlen 5
}
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_m -endian $_ENDIAN -chain-position $_TARGETNAME
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
set _FLASHNAME $_CHIPNAME.flash
flash bank $_FLASHNAME stm32f2x 0 0 0 0 $_TARGETNAME
# JTAG speed should be <= F_CPU/6. F_CPU after reset is 16MHz, so use F_JTAG = 2MHz
#
# 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 2000
adapter_nsrst_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 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_FZ |= DBG_IWDG_STOP | DBG_WWDG_STOP
mmw 0xE0042008 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
}
$_TARGETNAME configure -event reset-init {
# Configure PLL to boost clock to HSI x 4 (64 MHz)
mww 0x40023804 0x08012008 ;# RCC_PLLCFGR 16 Mhz /8 (M) * 128 (N) /4(P)
mww 0x40023C00 0x00000102 ;# FLASH_ACR = PRFTBE | 2(Latency)
mmw 0x40023800 0x01000000 0 ;# RCC_CR |= PLLON
sleep 10 ;# Wait for PLL to lock
mmw 0x40023808 0x00001000 0 ;# RCC_CFGR |= RCC_CFGR_PPRE1_DIV2
mmw 0x40023808 0x00000002 0 ;# RCC_CFGR |= RCC_CFGR_SW_PLL
# Boost JTAG frequency
adapter_khz 8000
}
$_TARGETNAME configure -event reset-start {
# Reduce speed since CPU speed will slow down to 16MHz with the reset
adapter_khz 2000
}
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