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With bootdelay set to 0 the U-Boot countdown is disabled, so there is a question how you enter the U-Boot command monitor, should you need that for some reason. To do so, push the Ctrl-C keys down on the serial console and don't release them until you have hit the reset button on the baseboard. This will interrupt the U-Boot bootcmd sequence and let you enter the U-Boot command monitor:
| Code Block |
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U-Boot SPL 20232024.04 (SepDec 0119 20232024 - 1708:3416:4746 +0000) Trying to boot from MMC1 U-Boot 20232024.04 (SepDec 0124 20232024 - 1706:3430:4718 +0000) Model: NXP imxrt1170-evk board DRAM: 960 KiB (effective 64.9 MiB)32 MiB Core: 7279 devices, 1518 uclasses, devicetree: separate MMC: FSL_SDHC: 0 Loading Environment from MMC... OK In: serial@4007c000serial@40184000 Out: serial@4007c000serial@40184000 Err: serial@4007c000serial@40184000 Net: eth0: ethernet@40424000ethernet@402d8000 Hit any key to stop autoboot: 0 => <INTERRUPT> => <INTERRUPT> |
From the command monitor, you would be able to set bootdelay to whatever value makes sense to you.
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