PreenFM > preenfm2 and preenfm3

PFM3 display black

(1/4) > >>

Juras:
Hello, today I built Preen FM 3 - kit. After power up yellow led 5v and Gnd 3.3v lights, but display is black.
Jumpers are on Dc in, Boot0 and Tft Vcc 5v.
Should be factory flashed, but no headers was soldered.
Any idea? Do I missing something?
Thanks for help.
Jiri.

Xavier:

Hi,

You should also see a blue led slowly blinking.
If not 2 possibilities :
. Do you have the Boot0 jumper set to GND/preenfm3 (and not to DFU)  ?
. The firmware is not flashed.

I carefully flash firmwares on the STM32 before shipping.
I don't need male header, i connect directly to female headers and it works fine. I always check the blue led is on after flashing.

Let m know,

Xavier

Juras:
no blue light at all, no blinking, no lighting.
Jumper on right: Boot 0 and Gnd.
So i need to flash fw and bootoader?
Jiri

Juras:
After many tries i was i DFU, flashed (DfuSeDemo) bootloader and firmware, now after power up i need to short reset twice, than blue light start to blink and screen shows up now works OK, control board too.
What do you think? Without reset it wont boot up. I am on v0.90.
thanks

Xavier:

--- Quote from: Juras on May 01, 2021, 09:16:04 PM ---After many tries i was i DFU, flashed (DfuSeDemo) bootloader and firmware, now after power up i need to short reset twice, than blue light start to blink and screen shows up now works OK, control board too.
What do you think? Without reset it wont boot up. I am on v0.90.
thanks

--- End quote ---

That's weird.
You told me you desoldered the reset button, double check every thing is clean after you desolder.

Then use latest firmware :
https://github.com/Ixox/preenfm2/releases
v0.90 is the first firmware i published and i'm sure it had lots of problem.

Navigation

[0] Message Index

[#] Next page