EXST - Allow targets to specify VMA offset.

The hex file must have the correct address in order for it to be
uploaded via flashing tools (configurator).

However, the objcopy tool only appears to support an INCREMENT address,
so the increment is determined by subtracting the load address from the
flash address.

For the current SPRacing H7 boards, the bootloader DFU descriptor string
has a start address of 0x9000000 for the external flash, the firmware
partition begins at offset 0x07CE0000, required resulting flash address
is 0x97CE0000.

Makefile

@@ -349,8 +349,10 @@ $(TARGET_BIN): $(TARGET_UNPATCHED_BIN)
 	$(OBJCOPY) $(TARGET_ELF) $(TARGET_EXST_ELF) --update-section .exst_hash=$(TARGET_EXST_HASH_SECTION_FILE)
 
 $(TARGET_HEX): $(TARGET_BIN)
-	@echo "Creating EXST HEX from patched EXST ELF $(TARGET_HEX)" "$(STDOUT)"
-	$(V1) $(OBJCOPY) -O ihex --set-start 0x8000000 $(TARGET_EXST_ELF) $@
+	$(if $(EXST_ADJUST_VMA),,$(error "EXST_ADJUST_VMA not specified"))
+
+	@echo "Creating EXST HEX from patched EXST ELF $(TARGET_HEX), VMA Adjust $(EXST_ADJUST_VMA)" "$(STDOUT)"
+	$(V1) $(OBJCOPY) -O ihex --adjust-vma $(EXST_ADJUST_VMA) $(TARGET_EXST_ELF) $@
 
 endif
 

src/main/target/SPRACINGH7EXTREME/target.mk

@@ -5,6 +5,9 @@ HSE_VALUE    = 8000000
 FEATURES       += VCP ONBOARDFLASH SDCARD_SDIO
 
 EXST = yes
+# flash address 0x97CE0000 - code_ram address (0x24010000) = 0x73CD0000 
+EXST_ADJUST_VMA = 0x73CD0000
+
 
 TARGET_SRC += \
             drivers/bus_quadspi_hal.c \

src/main/target/SPRACINGH7NANO/target.mk

@@ -3,6 +3,8 @@ H750xB_TARGETS += $(TARGET)
 HSE_VALUE    = 8000000
 
 EXST = yes
+# flash address 0x97CE0000 - code_ram address (0x24010000) = 0x73CD0000 
+EXST_ADJUST_VMA = 0x73CD0000
 
 FEATURES       += VCP ONBOARDFLASH
 

src/main/target/SPRACINGH7ZERO/target.mk

@@ -3,6 +3,8 @@ H750xB_TARGETS += $(TARGET)
 HSE_VALUE    = 8000000
 
 EXST = yes
+# flash address 0x97CE0000 - code_ram address (0x24010000) = 0x73CD0000 
+EXST_ADJUST_VMA = 0x73CD0000
 
 FEATURES       += VCP ONBOARDFLASH SDCARD_SDIO