I need your help.
I am using Arduino ProMini in my project.
In project board there is Atmega328P which doesn't have Arduino bootloader, and Atmega328P RXD, TXD pins are connected to FTDI Basic(sparkfun)'s TXD and RXD pins. I searched on internet how to burn bootloader for arduino. Most of them use other Arduino's built in SPI or other method. Problem is Atmega328P is already assembled to PCB board and I cannot make any soldering or change. Atmega328 and FTDI basic are connected and assembled to upload sketch (if there is bootloader of Arduino inside of Atmega328P, no problem to upload sketch).
Is there any solution or suggestions to burn bootloader using FTDI?