Other Parts Discussed in Thread: UNIFLASH
Hi,
I was asked to make a program where the main application resides in an OSPI flash and the custumer uses UART communication for fimware update.
From hereafter i will refer to the OSPI bootloader example provided by AM243x MCU+SDK as OSPI boot.
The two possible solutions that came up to my mind are:
A) At startup the ROM is in OSPI bootloader mode.
The main program is loaded using OSPI boot.
The program constanly listens to the UART port for a firwmare update.
B) At startup the ROM is in OSPI bootloader mode.
The OSPI boot(1) loads a custom made bootloader that listens for any update from the UART for a few seconds.
If no communication starts a second OSPI bootl(2) loads the main program.
(if a new firmware is being loaded via UART no timeout will occur and the second OSPI boot(2) will load the newly flashed firmware).
I am new to bootloaders so here's what I'm asking you experts:
- Are this valid solutions or is there a better way of solving this problem?
- Is there any available guideline on how to make such a bootloader or where can I find the documentation about it?
I already checked mcu_plus_sdk_am243x_08_03_00_18/docs/api_guide_am243x/BOOTFLOW_GUIDE.html but couldn't find a way of making solution A) or B)
