Ability to erase boot image trailer

Signed-off-by: Joakim Bech <joakim.bech@linaro.org>

1 files changed, 17 insertions, 6 deletions

diff --git a/zep2newt.py b/zep2newt.py
index b2b5354..7ed1ada 100755
--- a/zep2newt.py
+++ b/zep2newt.py
@@ -97,8 +97,8 @@ def create_jlink_script(image_file, offset, erase):
         f.write("loadfile %s %s\n" % (image_file, hex(int(offset, 16))))
         f.write("q\n")
         f.close()
-        print("To flash the Image for nrf52 using Jlink run:")
-        print(" JLinkExe -CommanderScript flash_zephyr.jlink")
+        print("\nTo flash the Image for nrf52 run:")
+        print(" $ JLinkExe -CommanderScript flash_zephyr.jlink")
 
 def create_jlink_bit_script(bit_file, bitoffset="0x7bff8"):
     with open("flash_bit.jlink", "w+") as f:
@@ -110,9 +110,21 @@ def create_jlink_bit_script(bit_file, bitoffset="0x7bff8"):
         f.write("loadfile %s %s\n" % (bit_file, hex(int(bitoffset, 16))))
         f.write("q\n")
         f.close()
-        print("To flash Boot Image Trailer for nrf52 using Jlink run:")
-        print(" JLinkExe -CommanderScript flash_bit.jlink")
+        print("\nTo flash Boot Image Trailer for nrf52 run:")
+        print(" $ JLinkExe -CommanderScript flash_bit.jlink")
 
+def create_jlink_clear_bit_script(bit_file, bitoffset="0x7bff8"):
+    with open("flash_clear_bit.jlink", "w+") as f:
+        f.write("device nrf52\n")
+        f.write("power on\n")
+        f.write("sleep 10\n")
+        f.write("si 1\n")
+        f.write("speed auto\n")
+        f.write("loadfile %s %s\n" % (bit_file, hex(int(bitoffset, 16))))
+        f.write("q\n")
+        f.close()
+        print("\nTo flash Boot Image Trailer for nrf52 run:")
+        print(" $ JLinkExe -CommanderScript flash_clear_bit.jlink")
 
 def usage():
     print(os.path.basename(sys.argv[0]) + " -b <zephyr.bin> -i <zephyr.img> -o <flash_base_offset> -f")
@@ -164,13 +176,12 @@ def main(argv):
 
     digest = calculate_hash(image_file)
     print("Hash of intermediate image: %s" % digest)
-
     append_hash(image_file, digest)
 
     create_jlink_script(image_file, offset, erase)
-
     curdir = os.path.dirname(sys.argv[0])
     create_jlink_bit_script(curdir + "/boot_image_trailer.bin")
+    create_jlink_clear_bit_script(curdir + "/empty_boot_image_trailer.bin")
 
     if try_flash:
         os.system("JLinkExe -CommanderScript flash_zephyr.jlink")