WhyCan Forum(哇酷开发者社区)

Hi there,

I thought with all this knowledge in this forum it would make sense to ask here.

I designed my own custom f1c200s board and the issue is that it unreliable when booting. I can read the SPI NOR in FEL without any issue.

U-Boot 2023.04-rc4 (Mar 17 2023 - 21:26:23 +0800) Allwinner Technology

CPU:   Allwinner F Series (SUNIV)
Model: Allwinner F1C
DRAM:  64 MiB
Core:  27 devices, 15 uclasses, devicetree: separate
WDT:   Not starting watchdog@1c20ca0
MMC:   mmc@1c0f000: 0
In:    serial
Out:   serial
Err:   serial
Net:   No ethernet found.
Hit any key to stop autoboot:  2

The board boots until here, most of the time freezing at „stop autoboot: 2“ not counting down further. Rarely it goes down to zero.

Do you have any idea what could be the reason?

I checked the voltages and they are fine. I also added capacitors close to the f1c200s but that doesn’t change much.

Do you have a hint where to look at? Might it be unstable power? A problem with the crystal habing wrong capacities?

I guess I can rule out a SPI NOR issue by downloading u-boot with SPL directly to DRAM.

Let me know what you think. I can upload my schematics of course.