Debug: adjust openocd config for max speed (#278)

debug/stm32wbx.cfg

@@ -0,0 +1,103 @@
+# 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
+
+set _FLASHNAME $_CHIPNAME.flash
+flash bank $_FLASHNAME stm32l4x 0 0 0 0 $_TARGETNAME
+
+# Common knowledges tells JTAG speed should be <= F_CPU/6.
+# F_CPU after reset is MSI 4MHz, so use F_JTAG = 500 kHz to stay on
+# the safe side.
+#
+# Note that there is a pretty wide band where things are
+# more or less stable, see http://openocd.zylin.com/#/c/3366/
+adapter speed 8000
+
+adapter srst delay 100
+if {[using_jtag]} {
+ jtag_ntrst_delay 100
+}
+
+reset_config srst_nogate
+
+if {![using_hla]} {
+   # if srst is not fitted use SYSRESETREQ to
+   # perform a soft reset
+   cortex_m reset_config sysresetreq
+}
+
+$_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 8000
+}
+
+$_TARGETNAME configure -event reset-start {
+    # Reset clock is MSI (4 MHz)
+    adapter speed 8000
+}
+
+$_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
+}

firmware/targets/f4/target.mk

@@ -1,6 +1,6 @@
 TOOLCHAIN = arm
 
-OPENOCD_OPTS	= -f interface/stlink.cfg -c "transport select hla_swd" -f target/stm32wbx.cfg -c "init" -c "adapter speed 4000"
+OPENOCD_OPTS	= -f interface/stlink.cfg -c "transport select hla_swd" -f ../debug/stm32wbx.cfg -c "init"
 
 BOOT_ADDRESS	= 0x08000000
 FW_ADDRESS		= 0x08008000