Prepare for openblt (#3445)

* Makefile: create and deliver srec file too

srec is used by OpenBLT tools

* Simplify common_make.sh

firmware/Makefile

@@ -345,6 +345,8 @@ OD   = $(TRGT)objdump
 SZ   = $(TRGT)size
 HEX  = $(CP) -O ihex
 BIN  = $(CP) -O binary
+# OpenBLT flasher expects srec files
+SREC = $(CP) -O srec
 
 # ARM-specific options here
 AOPT =

firmware/config/boards/common_make.sh

@@ -10,20 +10,23 @@ mkdir .dep
 make -j$(nproc) -r
 [ -e build/rusefi.hex ] || { echo "FAILED to compile by $SCRIPT_NAME with $PROJECT_BOARD $DEBUG_LEVEL_OPT and $EXTRA_PARAMS"; exit 1; }
 
+if uname | grep "NT"; then
+  HEX2DFU=../misc/encedo_hex2dfu/hex2dfu.exe
+else
+  HEX2DFU=../misc/encedo_hex2dfu/hex2dfu.bin
+fi
+chmod u+x $HEX2DFU
+
 mkdir -p deliver
 
 rm -f deliver/rusefi.dfu
-echo "$SCRIPT_NAME: invoking hex2dfu"
-if uname | grep "NT"; then
- chmod u+x ../misc/encedo_hex2dfu/hex2dfu.exe
- ../misc/encedo_hex2dfu/hex2dfu.exe -i build/rusefi.hex -o deliver/rusefi.dfu
-else
- chmod u+x ../misc/encedo_hex2dfu/hex2dfu.bin
- ../misc/encedo_hex2dfu/hex2dfu.bin -i build/rusefi.hex -o deliver/rusefi.dfu
-fi
+echo "$SCRIPT_NAME: invoking hex2dfu for RusEFI"
+$HEX2DFU -i build/rusefi.hex -o deliver/rusefi.dfu
+
 # rusEFI console does not use .hex files but for Cypress that's the primary binary format
 cp build/rusefi.hex deliver/
 cp build/rusefi.bin deliver/
+cp build/rusefi.srec deliver/
 
 echo "$SCRIPT_NAME: build folder content:"
 ls -l build