build-hexfiles.sh

#!/bin/sh
# SPDX-FileCopyrightText: Copyright 2022 EDF (Électricité de France S.A.)
# SPDX-License-Identifier: BSD-3-Clause
# See README for all details on copyright, authorship and license.

set -e

OURTMP=$(mktemp --directory)

# Note that we can distribute the result pretty easily -- it's a binary that is
# a software update for a Nordic device, and as such doesn't even need the
# license to be shipped with it.
wget https://nsscprodmedia.blob.core.windows.net/prod/software-and-other-downloads/softdevices/s132/s132_nrf52_7.3.0.zip -O "$OURTMP"/s132_nrf52_7.3.0.zip
unzip "$OURTMP"/s132_nrf52_7.3.0.zip s132_nrf52_7.3.0_softdevice.hex -d "$OURTMP"

mkdir -p images

for ident in $(cd configs/; echo *.yaml)
do
    RS_AS_ASSOCIATION=configs/$ident cargo +nightly build --release --target-dir=target
    objcopy -O ihex target/thumbv7em-none-eabihf/release/coap-ace-poc-firmware "$OURTMP"/firmware.hex
    # Observations regarding what needs to be in here:
    # * If a record 05 (Start Linear Address) is present, it refuses to process the
    #   file. (It leaves the file visible and does not eject the block device).
    # * If no record 03 (Start Segment Address) is present, it does flash the
    #   program, but it runs into some softdevice related panic during execution
    #   (observable by starting openocd after the eject, and a gdb with the own
    #   binary to interpret the current instruction). Reaching this would be easy
    #   to automate using the `-disable Execution_Start_Address` option, but it's
    #   bad user experience to need to restart the device.
    # * Trying to attach recover details from the error using `probe-run --chip
    #   nRF52832_xxAA target/thumbv7em-none-eabihf/release/coap-ace-poc-firmware
    #   --no-flash` leads to a reset, after which things just work (but error
    #   information is lost).
    # * If the record 03 is present with the value of the produced hex file, the
    #   same error occurs.
    # * In both error situation, both a `montor reset halt` / `c` or re-powering
    #   the board resolves the issue.
    # * The hex files provided by Nordic have no start address. (eg.
    #   proximity_demo/ble_app_proximity_s132_pca10040.hex,
    #   heart_rate_demo/heart_rate_demo.hex).
    srec_cat -disable Execution_Start_Address ./uicr_reset_pin21.hex -Intel "$OURTMP"/firmware.hex -Intel "$OURTMP"/s132_nrf52_7.3.0_softdevice.hex -Intel -o images/coap-ace-poc-firmware-${ident%.yaml}.hex -Intel -Output_Block_Size 16
done

rm -rf "${OURTMP}"