boards/atmega256rfr2-xpro: configure debug

boards/atmega256rfr2-xpro/Makefile.include

@@ -9,6 +9,8 @@ PROGRAMMER ?= xplainedpro
 
 # This board can be reset via avrdude
 RESET ?= avrdude -c $(PROGRAMMER) -p m256rfr2
+# Use edbg interface for debugging
+DEBUGSERVER_INTERFACE ?= --edbg
 
 include $(RIOTMAKE)/tools/avrdude.inc.mk
 include $(RIOTBOARD)/common/atmega/Makefile.include

boards/atmega256rfr2-xpro/dist/debug.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+# The setsid command is needed so that Ctrl+C in GDB doesn't kill avarice
+: ${SETSID:=setsid}
+
+sleep 2
+${SETSID} -w avarice $1 &
+sleep 3 && avr-gdb -ex "target remote localhost:$3" $4
+
+# avarice exits with 1 if the connection is released, therefore we always exit with 0
+exit 0

boards/atmega256rfr2-xpro/dist/debug_srv.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+sleep 2
+avarice $1
+
+# avarice exits with 1 if the connection is released, therefore we always exit with 0
+exit 0

boards/atmega256rfr2-xpro/dist/gdb.conf

@@ -0,0 +1 @@
+set $pc=0x00