Add wasp-reloader as a git submodule.

Convert the .bin file in hex and then in .h file for the reloader.
Build the reloader to generate the DFU file that will allow to upgrade the bootloader on a PineTime

.gitignore

@@ -47,3 +47,5 @@ libftdi1*.bz2
 libusb*/
 hidapi*/
 .idea/*
+
+/reloader/

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "reloader"]
+	path = reloader
+	url = [email protected]:daniel-thompson/wasp-reloader.git

README.md

@@ -68,8 +68,9 @@ The goal of this firmware is to provide a mean for the user to OTA a new firmwar
 
 - Install `newt` tool
 - Clone the project and `cd` into it
+- Init and update submodules : `git submodule update --init --recursive`
 - Configure mynewt : `newt upgrade`
-- Build : `scripts/nrf52/build-boot.sh`. The firmware is generated in `bin/targets/nrf52_boot/app/@mcuboot/boot/mynewt/mynewt.elf`
+- Build : `scripts/nrf52/build-boot.sh`. The firmware is generated in `bin/targets/nrf52_boot/app/@mcuboot/boot/mynewt/mynewt.elf` and the DFU file for the reloader : `reloader/build-pinetime/reloader-mcuboot.zip`
 
 ## About the code
 

scripts/hex2c.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+
+# SPDX-License-Identifier: LGPL-3.0-or-later
+# Copyright (C) 2020 Daniel Thompson
+
+import binascii
+import intelhex
+import sys
+
+def generate_c(ihex):
+    print('/* this file is auto-generated - DO NOT EDIT */')
+    print()
+    print('#include <stdint.h>')
+    print()
+    print('struct segment {')
+    print('    uint32_t start;');
+    print('    uint32_t end;');
+    print('    uint32_t crc32;')
+    print('    const uint8_t *data;')
+    print('};')
+    print()
+
+    segments = []
+    chunk = 32 * 1024
+    for (start, end) in ihex.segments():
+        while start + chunk < end:
+            segments.append((start, start + chunk))
+            start += chunk
+        if start < end:
+            segments.append((start, end))
+
+    for i, segment in enumerate(segments):
+        print(f'static const uint8_t segment{i}[] = {{', end='')
+
+        for j in range(segment[0], segment[1]):
+            if 0 == j % 12:
+                print('\n   ', end='')
+            print(f' 0x{ihex[j]:02x},', end='')
+
+        print('\n};\n')
+    print(f'const struct segment segments[] = {{')
+    for i, segment in enumerate(segments):
+        sg = ihex.tobinarray(start=segment[0], end=segment[1]-1)
+        crc = binascii.crc32(sg)
+        print(f'    0x{segment[0]:08x}, 0x{segment[1]:08x}, 0x{crc:08x}, segment{i},')
+    print('};')
+
+ihex = intelhex.IntelHex()
+ihex.loadhex(sys.argv[1])
+generate_c(ihex)

scripts/nrf52/build-boot.sh

@@ -13,6 +13,12 @@ newt build nrf52_boot
 #  Show the size.
 newt size -v nrf52_boot
 
-#  Copy the disassembler and linker map to the logs folder. For Stub Bootloader, select "bin/targets/nrf52_boot/app/apps/boot_stub/boot_stub.elf.*"
-cp bin/targets/nrf52_boot/app/boot/mynewt/mynewt.elf.lst logs
-cp bin/targets/nrf52_boot/app/boot/mynewt/mynewt.elf.map logs
+arm-none-eabi-objcopy -I binary -O ihex bin/targets/nrf52_boot/app/@mcuboot/boot/mynewt/mynewt.elf.bin bin/targets/nrf52_boot/app/@mcuboot/boot/mynewt/mynewt.elf.hex
+scripts/hex2c.py bin/targets/nrf52_boot/app/@mcuboot/boot/mynewt/mynewt.elf.hex > reloader/src/boards/pinetime/bootloader.h
+make -C reloader BOARD=pinetime
+
+set +x
+echo "Bootloader firmware (elf) : bin/targets/nrf52_boot/app/@mcuboot/boot/mynewt/mynewt.elf"
+echo "Bootloader firmware (bin) : bin/targets/nrf52_boot/app/@mcuboot/boot/mynewt/mynewt.bin"
+echo "Bootloader firmware (hex) : bin/targets/nrf52_boot/app/@mcuboot/boot/mynewt/mynewt.hex"
+echo "Reloader (DFU) : reloader/build-pinetime/reloader-mcuboot.zip"