wip: giga: use iConfiguration to automatically reflash the loader if needed

Requires arduino/arduino-cli#3171 and arduino/serial-discovery#116 (and, transitively, bugst/go-serial#215)

TODO:
* replace the shell script with a proper version check utility
* check if other uploaders need different methods

Author: facchinm

boards.txt

@@ -46,6 +46,7 @@ giga.upload.vid=0x2341
 giga.upload.pid=0x0366
 giga.upload.interface=0
 giga.upload.use_1200bps_touch=true
+giga.upload.use_pre_upload_check=true
 giga.upload.wait_for_upload_port=true
 giga.upload.native_usb=true
 giga.upload.maximum_size=1966080

platform.txt

@@ -225,6 +225,10 @@ tools.stm32flash.erase.pattern="{path}/{cmd}" {serial.port} -e 1024 -b 2400
 # DFU_UTIL
 #
 
+tools.dfu-util.pre_cmd.linux={build.variant.path}/check_loader_version.sh
+tools.dfu-util.pre_upload_check.pattern="{pre_cmd}" {upload.port.properties.configuration}
+tools.dfu-util.pre_upload.pattern="{path}/{cmd}" --device ,{bootloader.vid}:{bootloader.pid} -D "{runtime.platform.path}/firmwares/{bootloader.file}" -a{bootloader.interface} --dfuse-address={bootloader.address}
+
 upload.dfuse=--dfuse-address={upload.address}:leave
 bootloader.dfuse=--dfuse-address={bootloader.address}:leave
 

variants/arduino_giga_r1_stm32h747xx_m7/check_loader_version.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+DIR=$(dirname "$(readlink -f "$0")")
+VERSION=$(grep "define BUILD_VERSION" ${DIR}/llext-edk/include/zephyr/include/generated/zephyr/version.h | cut -f3 -d " ")
+if [ "$VERSION" != "$1" ]; then
+    echo "Loader version mismatch: expected $1, got $VERSION, reflashing loader"
+    exit 1
+fi
+exit 0