scripts:nrf: Add 'make flash' for nrf boards.

Tested on nrf52_pca10040 and nrf51_pca10028 using hello_world sample.

Change-Id: I7cdf1d21e7f8232da737a06e5afbfb1eaec05cde
Signed-off-by: Michał Kruszewski <mkru1992@gmail.com>

boards/arm/nrf51_pca10028/Makefile.board

@@ -0,0 +1,5 @@
+FLASH_SCRIPT = nrf_flash.sh
+
+NRF_FAMILY = NRF51
+
+export FLASH_SCRIPT NRF_FAMILY

boards/arm/nrf52840_pca10056/Makefile.board

@@ -0,0 +1,5 @@
+FLASH_SCRIPT = nrf_flash.sh
+
+NRF_FAMILY = NRF52
+
+export FLASH_SCRIPT NRF_FAMILY

boards/arm/nrf52_pca10040/Makefile.board

@@ -0,0 +1,5 @@
+FLASH_SCRIPT = nrf_flash.sh
+
+NRF_FAMILY = NRF52
+
+export FLASH_SCRIPT NRF_FAMILY

scripts/support/nrf_flash.sh

@@ -0,0 +1,57 @@
+#!/bin/sh
+
+HEX_NAME=${O}/${KERNEL_HEX_NAME}
+
+command -v nrfjprog >/dev/null 2>&1 || { echo >&2 "Can't flash nRF board,"\
+						  "nrfjprog is not installed."\
+						  "Aborting."; exit 1; }
+
+CONNECTED_BOARDS=`nrfjprog --ids`
+read -s -a BOARD_LIST <<< $CONNECTED_BOARDS
+
+BOARDS_NUM=`echo "$CONNECTED_BOARDS" | wc -l`
+if [ $BOARDS_NUM == 1 ]
+then
+	BOARD_SNR=$BOARD_LIST
+else
+	echo "There are multiple boards connected."
+	for i in $(seq 1 1 $BOARDS_NUM)
+	do
+		echo $i. ${BOARD_LIST[$i - 1]}
+	done
+
+	prompt="Please select one with desired serial number (1-$BOARDS_NUM):"
+	while true; do
+		read -p "$prompt" ANS
+		if [ 1 -le $ANS -a $ANS -le $BOARDS_NUM ]
+		then
+			break;
+		else
+			echo -n
+		fi
+	done
+
+	BOARD_SNR=${BOARD_LIST[$ANS - 1]}
+fi
+
+echo "Flashing file: "${HEX_NAME}
+
+nrfjprog --eraseall -f $NRF_FAMILY --snr $BOARD_SNR &&
+nrfjprog --program $HEX_NAME -f $NRF_FAMILY --snr $BOARD_SNR &&
+if [ $NRF_FAMILY == NRF52 ]
+then
+	# Set reset pin
+	nrfjprog --memwr 0x10001200 --val 0x00000015 \
+		 -f $NRF_FAMILY --snr $BOARD_SNR
+	nrfjprog --memwr 0x10001204 --val 0x00000015 \
+		 -f $NRF_FAMILY --snr $BOARD_SNR
+	nrfjprog --reset -f $NRF_FAMILY --snr $BOARD_SNR
+fi
+nrfjprog --pinreset -f $NRF_FAMILY --snr $BOARD_SNR
+
+if [ $? -eq 0 ]; then
+    echo "${BOARD} Serial Number $BOARD_SNR flashed with success."
+else
+    echo "Flashing ${BOARD} failed."
+    exit 2;
+fi