I think it is software related. I checked the possibility of a short circuit as
much as I could.
It is interesting that there is no any signal on GPIO25 SPI2 MISO line but
there is an un-expected signal on GPIO13; something like GPIO13 and GPIO25
lines are cross wired!
On 2021/07/25 19:49:08,
PROGRESS:
To simplify the problem I removed LVGL and its SPI 2 configurations, tried to
run MmcSDSpi with SPI Port 3. Initially it didn't work due a restriction in
Nuttx (esp32_mmcsd.c Line 70), but after I changed the expected port number
from 2 to 3, I could mount and use the MMcSD as expected
