Mity CPU Platforms » MitySOM-5CSX Altera Cyclone V

11/25/2021

MW 12:31 PM PCB Development: RE: Bootup Peculiarities

Hi Lucas,
In your boot log, I am seeing several error messages around the SD-MMC card (ext4-fs /dev/mmcblk0p* devices) that I would not expect to see with a freshly flashed SD card.
What model SD card are you using? Some of the ch... Michael Williamson

11/24/2021

LU 08:58 PM PCB Development: RE: Bootup Peculiarities

Correction!
I held down the POR low a little longer and it booted...
U-Boot SPL 2013.01.01 (Sep 14 2021 - 18:34:24)
BOARD : Critical Link MitySOM-5CSx Module
CLOCK: EOSC1 clock 25000 KHz
CLOCK: EOSC2 clock 25000 KHz
CLOCK... Lucas Uecker

LU 07:56 PM PCB Development: RE: Bootup Peculiarities

No output from console on the module that has the NCONFIG light come on.
New module doesn't boot up, so no output from console. Lucas Uecker

DV 05:14 PM PCB Development: RE: Bootup Peculiarities

Hi Lucas,
It looks like you do have the pull ups on CMD and D0. Can you post your console log of the SOM hanging during boot?
Thanks,
Dan Daniel Vincelette

LU 02:26 PM PCB Development: RE: Bootup Peculiarities

!SDcardRs.PNG! Lucas Uecker

LU 02:25 PM PCB Development: RE: Bootup Peculiarities

Here's the relevant area on my schematic: Lucas Uecker

MW 02:16 PM PCB Development: RE: Bootup Peculiarities

Hi Lucas,
Do you have the pull up resistors on the SD Card interface?
Have you looked at this support page on "Carrier Board Gotchas":https://support.criticallink.com/redmine/projects/5csxbase/wiki/Carrier_Board_Design_Gotchas#SD-c... Michael Williamson

11/22/2021

LU 10:22 PM PCB Development: Bootup Peculiarities

Hello again.
I have built a handful of prototypes of our carrierboard and have had some boot up fine (I have it set to boot off of an SD card), but some just seemed to hang on bootup.
Today I happened to press the POR button (conne... Lucas Uecker