PreenFM > preenfm2 and preenfm3
[fixed in 0.95 ?] preenfm3 sd card error
lokki:
hi xavier,
i flashed the firmware successfully.
unfortunately my LCD was a different kind of pcb, but still 2.8''. the holes for the sdcard-reader don't align. i bent some headers and soldered it, but maybe something is wrong...it is also possible the reader does not work on the PCB, it is a cheap chinese LCD. the screen itself works flawless.
now,
-when i boot up without an sdcard inserted i get a: SD CARD ERROR after which the preenfm3 boots successfully.
-when i insert a sdcard at boot up, the screen just stays black. if i then unplug the sdcard, the screen goes white
-when i insert a sdcard after boot up the screen goes black. when i remove it the screen goes white.
does that indicate anything?
if i would attach a separate sdcard reader module, i need the four connections and 3.3v and gnd?
Xavier:
Hi,
I just replied to the other thread to flash the firmware, glad you could flash it.
Can you let me know the exact TFT you have.
I didn't know some of them have different SD pins.
What are the 4 SD pins label on the TFT ?
Maybe some of them does not correspond to what the preenfm3 expect.
lokki:
sorry, yes i realised the "x" thing after a while as well, had no time to post it yet.
this is the link to the display:
https://www.aliexpress.com/item/4001135326039.html?spm=a2g0s.9042311.0.0.27424c4dP0cOvE
the sd pins seem to align, no?
is there anything more verbose in regard to the sdcard that i could try?
Xavier:
It's difficult to get any info from the SD card other than it does no work.
--- Quote from: lokki on October 18, 2020, 09:37:54 AM ----when i boot up without an sdcard inserted i get a: SD CARD ERROR after which the preenfm3 boots successfully.
--- End quote ---
OK that's expected.
--- Quote from: lokki on October 18, 2020, 09:37:54 AM ----when i insert a sdcard at boot up, the screen just stays black. if i then unplug the sdcard, the screen goes white
--- End quote ---
Seems like it stays locked while trying to initialize the SD driver (or read from the card).
Does your SD card contain the /pfm3/ folder ?
If yes can you try to reformat it (fat32) and copy the /pfm3/ folder again on it.
lokki:
it seems i am missing some fundamental stuff :-) 8)
will copy the folder to the sdcard (did not know i had to do that) the wiki does not mention it, no?
i guess i have to look at the zip file.
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