Make blankflash target automatically calculate pos to write to

Makefile.combined

@@ -10,6 +10,8 @@ TARGET_OUT	:= $(addprefix $(BUILD_BASE)/,$(TARGET).out)
 
 .PHONY: ldscript_memspecific.ld
 
+BLANKPOS="$$(printf "0x%X" $$(($(ESP_SPI_FLASH_SIZE_K)*1024-0x2000)))"
+INITDATAPOS="$$(printf "0x%X" $$(($(ESP_SPI_FLASH_SIZE_K)*1024-0x4000)))"
 
 ldscript_memspecific.ld:
 	$(vecho) "GEN $@"
@@ -30,5 +32,5 @@ flash: $(TARGET_OUT) $(FW_BASE)
 	$(Q) $(ESPTOOL) $(ESPTOOL_OPTS) write_flash $(ESPTOOL_FLASHDEF) 0x00000 $(FW_BASE)/0x00000.bin 0x40000 $(FW_BASE)/0x40000.bin
 
 blankflash:
-	$(Q) $(ESPTOOL) $(ESPTOOL_OPTS) write_flash $(ESPTOOL_FLASHDEF) 0x7E000 $(SDK_BASE)/bin/blank.bin 0x7F000 $(SDK_BASE)/bin/esp_init_data_default.bin
+	$(Q) $(ESPTOOL) $(ESPTOOL_OPTS) write_flash $(ESPTOOL_FLASHDEF) $(BLANKPOS) $(SDK_BASE)/bin/blank.bin $(INITDATAPOS) $(SDK_BASE)/bin/esp_init_data_default.bin
 

Makefile.separate

@@ -10,6 +10,9 @@ TARGET_OUT	:= $(addprefix $(BUILD_BASE)/,$(TARGET).out)
 
 .PHONY: ldscript_memspecific.ld
 
+BLANKPOS="$$(printf "0x%X" $$(($(ESP_SPI_FLASH_SIZE_K)*1024-0x2000)))"
+INITDATAPOS="$$(printf "0x%X" $$(($(ESP_SPI_FLASH_SIZE_K)*1024-0x4000)))"
+
 ldscript_memspecific.ld:
 	$(vecho) "GEN $@"
 	$(Q) echo "MEMORY { irom0_0_seg : org = 0x40240000, len = "$$(printf "0x%X" $$(($(ESP_SPI_FLASH_SIZE)-0x4000)))" }"> ldscript_memspecific.ld
@@ -27,7 +30,7 @@ flash: $(TARGET_OUT) $(FW_BASE)
 	$(Q) $(ESPTOOL) $(ESPTOOL_OPTS) write_flash  $(ESPTOOL_FLASHDEF) 0x00000 $(FW_BASE)/0x00000.bin 0x40000 $(FW_BASE)/0x40000.bin
 
 blankflash:
-	$(Q) $(ESPTOOL) $(ESPTOOL_OPTS) write_flash  $(ESPTOOL_FLASHDEF) 0x7E000 $(SDK_BASE)/bin/blank.bin 0x7C000 $(SDK_BASE)/bin/esp_init_data_default.bin
+	$(Q) $(ESPTOOL) $(ESPTOOL_OPTS) write_flash  $(ESPTOOL_FLASHDEF) $(BLANKPOS) $(SDK_BASE)/bin/blank.bin $(INITDATAPOS) $(SDK_BASE)/bin/esp_init_data_default.bin
 
 htmlflash: libesphttpd
 	$(Q) if [ $$(stat -c '%s' libesphttpd/webpages.espfs) -gt $$(( $(ESPFS_SIZE) )) ]; then echo "webpages.espfs too big!"; false; fi