On 1/30/20 5:21 PM, Lukas Auer wrote:
Interesting, I thought all SD cards support SPI mode.
I think it's a different issue, but I wasn't sure.
The board I am using has some serial issues which makes it difficult to flash any large images. I can get u-boot to flash after several attempts, but something like the linux kernel is far too unreliable to test regularly. I'm going to see if I can get my hands on another k210 board which hopefully doesn't have these issues.
Ah ok, that's unfortunate. Thank you for your efforts!
I have since found a computer where the serial works fine (which implies that the USB hardware on my current computer has some issues). I should be able to flash larger binaries fine now, but the current issue is getting the SPI to work. I think there may be some subtle differences between the driver and the manufacturer's sdk.
I am also having some clock problems, despite (obstensibly) performing the same incantations as the sdk. I guess this is what happens when they refuse to release a technical reference...
--Sean