Activity

From 11/02/2021 to 12/01/2021

LU 08:26 PM PCB Development: RE: Bootup Peculiarities: I've had the condition where the board will boot after HPS_POR_N is pulled low, and a condition where the boot doesn't occur but the illumination level of the LEDs on the module changes.
If I disconnect supply power to the ethernet (L... Lucas Uecker

LU 07:41 PM PCB Development: RE: Bootup Peculiarities: No lights come up on the module that lights up NCONFIG light.
On the second test module, both lights stay on until a few seconds after HPS_POR_N is pulled low. Then the yellow light goes off. This is the condition that got as far as t... Lucas Uecker
DV 07:34 PM PCB Development: RE: Bootup Peculiarities: Hi Lucas,
It is sounding like the SOM might of gotten damaged. Does the green LED on the SOM turn on? This is the power good LED that will turn on if all the power supplies on the SOM come up correctly.
Dan Daniel Vincelette
LU 02:56 PM PCB Development: RE: Bootup Peculiarities: The Module that turned on our NCONFIG light did not boot on the dev board. I copied our NCONFIG LED from the dev board reference schematic with 3.3v -> 267 ohm resistor -> NCONFIG pin w/ TP10
HPS_POR_N is connected to a 1000pF cap and... Lucas Uecker
DV 02:48 PM PCB Development: RE: Bootup Peculiarities: Hi Lucas,
Did the SOM that was turning on the NCONFIG light on your baseboard boot fine in our Dev Kit?
What do you have connected to the HPS_NOR_N pin on your baseboard? Here's a snippet from our design guide about connecting up t... Daniel Vincelette

LU 11:13 PM PCB Development: RE: Bootup Peculiarities: This is probing the HPS_POR_N: Lucas Uecker
LU 09:13 PM PCB Development: RE: Bootup Peculiarities: Got together the dev kit:
-booted fine (both LEDs on the module came on, then one went off) with the microSD in an adapter
-tried the module that was turning on the NCONFIG light on my board. On the dev board D405 lit up and D100 s... Lucas Uecker
LU 02:58 PM PCB Development: RE: Bootup Peculiarities: Here are the parts of the board in question and this version does look like a confused mess now that I'm looking at it.
The SOIC on top is a TPS2044D to handle the power switching for a USB hub that I added. Lucas Uecker
LU 02:45 PM PCB Development: RE: Bootup Peculiarities: We've used fancypants Sandisk "Industrial" ones, but also regular Sandisk branded ones. I'll put on the design review list of testing SD cards and/or plan to move to eMMC.
It might be worth pointing out that we're using microSD cards.... Lucas Uecker

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

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

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

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Mity CPU Platforms » MitySOM-5CSX Altera Cyclone V