2 # M0+ devices only have SW-DP, but swj-dp code works, just don't
3 # set any jtag related features
6 source [find target/swj-dp.tcl]
7 source [find mem_helper.tcl]
9 if { [info exists CHIPNAME] } {
10 set _CHIPNAME $CHIPNAME
17 # Work-area is a space in RAM used for flash programming
18 # By default use 2kB (max ram on smallest part)
19 if { [info exists WORKAREASIZE] } {
20 set _WORKAREASIZE $WORKAREASIZE
22 set _WORKAREASIZE 0x800
25 # JTAG speed should be <= F_CPU/6.
26 # F_CPU after reset is ~2MHz, so use F_JTAG max = 333kHz
29 adapter srst delay 100
31 if { [info exists CPUTAPID] } {
32 set _CPUTAPID $CPUTAPID
34 # Arm, m0+, non-multidrop.
35 # http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/ka16088.html
36 set _CPUTAPID 0x0bc11477
39 swj_newdap $_CHIPNAME cpu -expected-id $_CPUTAPID
40 dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
42 set _TARGETNAME $_CHIPNAME.cpu
43 target create $_TARGETNAME cortex_m -endian $_ENDIAN -dap $_CHIPNAME.dap
45 $_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
47 # flash size will be probed
48 set _FLASHNAME $_CHIPNAME.flash
49 flash bank $_FLASHNAME stm32lx 0x08000000 0 0 0 $_TARGETNAME
51 reset_config srst_nogate
54 # if srst is not fitted use SYSRESETREQ to
55 # perform a soft reset
56 cortex_m reset_config sysresetreq
59 proc stm32l0_enable_HSI16 {} {
60 # Enable HSI16 as clock source
61 echo "STM32L0: Enabling HSI16"
63 # Set HSI16ON in RCC_CR (leave MSI enabled)
64 mmw 0x40021000 0x00000101 0
66 # Set HSI16 as SYSCLK (RCC_CFGR)
67 mmw 0x4002100c 0x00000001 0
69 # Wait until System clock switches to HSI16
70 while { ([ mrw 0x4002100c ] & 0x0c) != 0x04 } { }
76 $_TARGETNAME configure -event reset-init {
80 $_TARGETNAME configure -event reset-start {
84 $_TARGETNAME configure -event examine-end {
85 # DBGMCU_CR |= DBG_STANDBY | DBG_STOP | DBG_SLEEP
86 mmw 0x40015804 0x00000007 0
88 # Stop watchdog counters during halt
89 # DBGMCU_APB1_FZ |= DBG_IWDG_STOP | DBG_WWDG_STOP
90 mmw 0x40015808 0x00001800 0
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