Hey summers,
Happen to drop by today to look for some really old info I can't no longer remember
The SPL part of u-boot does not have a countdown. Only u-boot proper has a countdown. So when you encounter some issue during SPL, it's harder to troubleshoot.
According to the instruction, this card has 2 MMC devices, SD and eMMC.
$this->bbcode_second_pass_code('', 'SW1-SW2
0 - 0 : Boot from SD card
1 - 0 : Boot from eMMC
0 - 1 : Boot from NAND flash
1 - 1 : Illegal
')
So that DIP switch needs to be set to 0. I noticed Rethfor's screenshot said "booting MMC1", but the boot device is MMC0. Perhaps that is the problem.
HTH,
-bodhi