Added hexfile target

stmhal/Makefile

@@ -196,7 +196,7 @@ OBJ += $(addprefix $(BUILD)/, $(SRC_FATFS:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_CC3K:.c=.o))
 OBJ += $(BUILD)/pins_$(BOARD).o
 
-all: $(BUILD)/firmware.dfu
+all: $(BUILD)/firmware.dfu $(BUILD)/firmware.hex
 
 .PHONY: deploy
 
@@ -210,6 +210,10 @@ $(BUILD)/firmware.dfu: $(BUILD)/firmware.elf
 	$(Q)$(OBJCOPY) -O binary -j .text -j .data $^ $(BUILD)/firmware1.bin
 	$(Q)$(PYTHON) $(DFU) -b 0x08000000:$(BUILD)/firmware0.bin -b 0x08020000:$(BUILD)/firmware1.bin $@
 
+$(BUILD)/firmware.hex: $(BUILD)/firmware.elf
+	$(ECHO) "Create $@"
+	$(Q)$(OBJCOPY) -O ihex $< $@
+
 $(BUILD)/firmware.elf: $(OBJ)
 	$(ECHO) "LINK $@"
 	$(Q)$(LD) $(LDFLAGS) -o $@ $(OBJ) $(LIBS)