From cd9a8c174209c869bd590e8408503dc20863c291 Mon Sep 17 00:00:00 2001
From: Jim Mussared <jim.mussared@gmail.com>
Date: Mon, 20 Apr 2020 16:22:28 +1000
Subject: [PATCH] nrf: Add openocd as a supported flasher.

Tested with the Particle Debugger on a Xenon.
---
 ports/nrf/Makefile                             | 18 ++++++++++++++++++
 .../nrf/boards/particle_xenon/mpconfigboard.mk |  4 ++++
 2 files changed, 22 insertions(+)

diff --git a/ports/nrf/Makefile b/ports/nrf/Makefile
index b6602de0b4..23d5cd20d0 100644
--- a/ports/nrf/Makefile
+++ b/ports/nrf/Makefile
@@ -419,6 +419,24 @@ sd: $(BUILD)/$(OUTPUT_FILENAME).elf
 	    -ex 'quit' \
 	    $<
 
+else ifeq ($(FLASHER), openocd)
+
+OPENOCD ?= openocd
+
+ifeq ($(MCU_VARIANT), nrf51)
+OPENOCD_TARGET ?= target/nrf52.cfg
+else ifeq ($(MCU_VARIANT), nrf52)
+OPENOCD_TARGET ?= target/nrf52.cfg
+else
+$(error Unsupported openocd target)
+endif
+
+deploy: $(BUILD)/$(OUTPUT_FILENAME).hex
+	$(Q)$(OPENOCD) -f interface/cmsis-dap.cfg -f $(OPENOCD_TARGET) -c "init" -c "program $< verify reset" -c "exit"
+
+sd: $(BUILD)/$(OUTPUT_FILENAME).hex
+	$(Q)$(OPENOCD) -f interface/cmsis-dap.cfg -f $(OPENOCD_TARGET) -c "init" -c "program $(SOFTDEV_HEX) verify reset" -c "exit"
+
 endif
 
 flash: deploy
diff --git a/ports/nrf/boards/particle_xenon/mpconfigboard.mk b/ports/nrf/boards/particle_xenon/mpconfigboard.mk
index ca555d3932..34bead59ff 100644
--- a/ports/nrf/boards/particle_xenon/mpconfigboard.mk
+++ b/ports/nrf/boards/particle_xenon/mpconfigboard.mk
@@ -5,3 +5,7 @@ SOFTDEV_VERSION = 6.1.1
 LD_FILES += boards/nrf52840_1M_256k.ld
 
 NRF_DEFINES += -DNRF52840_XXAA
+
+# The nrf52-particle.cfg is not included here, it can be found in the Particle Workbench
+# Note: This requires openocd >0.10
+OPENOCD_TARGET ?= boards/$(BOARD)/nrf52-particle.cfg