Add ST-Link/OpenOCD support as a programmer

Author: GrumpyOldPizza

platform.txt

@@ -121,11 +121,11 @@ tools.stm32l4_upload.bootloader.params.verbose=-v
 tools.stm32l4_upload.bootloader.params.quiet=
 tools.stm32l4_upload.bootloader.pattern="{path}/{cmd}" "{runtime.platform.path}/bootloaders/{bootloader.file}"
 
-tools.openocd.path={runtime.platform.path}/tools/windows
-tools.openocd.path.macosx={runtime.platform.path}/tools/macosx
-tools.openocd.path.linux={runtime.platform.path}/tools/linux/openocd
-tools.openocd.cmd=bin/openocd
-tools.openocd.cmd.windows=bin/openocd.exe
+tools.openocd.path={runtime.platform.path}/tools/windows/openocd/bin
+tools.openocd.path.macosx={runtime.platform.path}/tools/macosx/openocd/bin
+tools.openocd.path.linux={runtime.platform.path}/tools/linux/openocd/bin
+tools.openocd.cmd=/openocd
+tools.openocd.cmd.windows=openocd.exe
 
 tools.openocd.upload.params.verbose=-d2
 tools.openocd.upload.params.quiet=-d0

variants/STM32L476RE-Dragonfly/openocd_scripts/stm32l476re_dragonfly.cfg

@@ -1,5 +1,4 @@
-# This is an STM32L476G disco board with a single STM32L476VGT6 (1MB) chip.
-# ### To be updated ### http://www.st.com/internet/evalboard/product/.jsp
+# This is a Dragonfly L476RE board with a single STM32L476RET6 chip.
 #
 
 # This is for using the onboard STLINK/V2
@@ -13,7 +12,7 @@ set WORKAREASIZE 0x18000
 # chip name
 set CHIPNAME STM32L476
 
-source [find target/stm32l4.cfg]
+source [find target/stm32l4x.cfg]
 
 reset_config none separate