You’re most definitely not bricked. This board can always boot from UART, through the non-updatable internal bootloader. There’s a rescue image for that, which can be used to write good firmware into SPI.
Get a serial port connection if you don’t already have one. A cheap cp2104 is what I recommend.
So to avoid further mistakes, let me repeat what i did understand from your answer:
With the 3.4.5 FW i “soft-killed” my ability to boot with SPL Method. This seems to be the normal way of booting ? I did this by flashing the SPL “module” of mtd.
The 202306 minimal SD Card Image has a backup boot method with uboot bootloader (which i also upgraded in my previous step with the fw_update img file) but this should still work with the 3.4.5 img file correct ? Do need to press something on the keybord as i will most likely see nothing ?
To tell the board to use the backup boot method i have to use: SDIO Boot mode. This is achieved by the following jumper setting:
RPIO1 = 0 (L) RPIO2= 1(H)
With this a 202306 minimal image will boot up and i can DOWNGRADE spl and uboot firmware to v3.1.5. Or would it be better to continue booting this way and wait for a updated firmware that does not have this error ?
Thanks! I have one somewhere of course but i never used it and have to look for it.
I read the recovery instructions but they are quite diffuse. how would i do this in Linux ? It seems they connect the uart usb and then it will be detected automaticly form the programm “Tera Term” and this will ask for a file to flash of some kind ?