Bootloader question: Does it skip the first X bytes of the .HEX file?

Other Hardware 3rd Party Boards
13

I'm nor so sure you can get AVRDUDE to burn two separate hex files (as in sketch code and bootloader code) as I think it has to erase flash before it burns the flash.

I have the entire BATCH script here: http://www.hackster.io/rayburne/avr-firmware-duplicator
but, in general:

To Read and create a disk file image:
flash
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U flash:r:%temp%\backup_flash.bin:r
eeprom
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U eeprom:r:%temp%\backup_eeprom.bin:r
hfuse
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U hfuse:r:%temp%\backup_hfuse.bin:r
lfuse
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U lfuse:r:%temp%\backup_lfuse.bin:r
efuse
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U efuse:r:%temp%\backup_efuse.bin:r

To Write a disk file image into the ATmega328 microcontroller (no line breaks):
flash
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U flash:w:\Users\owner\AppData\Local\Temp\backup_flash.bin
eeprom
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U eeprom:w:\Users\owner\AppData\Local\Temp\backup_eeprom.bin
hfuse
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U hfuse:w:\Users\owner\AppData\Local\Temp\backup_hfuse.bin
lfuse
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U lfuse:w:\Users\owner\AppData\Local\Temp\backup_lfuse.bin
efuse
avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U efuse:w:\Users\owner\AppData\Local\Temp\backup_efuse.bin

intelhex.pdf (28.5 KB)

Intel HEX-record Format.pdf (114 KB)