Home Forums Hardware discussions Serial over USB not working. Reply To: Serial over USB not working.


entering ‘h’ or ‘?’ returns this block of text…

h/? - print this help screen
r yyyyyyyy - read register/memory at address yyyyyyyy in hex
w yyyyyyyy zzzzzzzz - write zzzzzzzz to address yyyyyyyy in hex
j yyyyyyyy - jump to address yyyyyyyy in hex
x y - change the boot mode, where y is in hex
a - UART control passed to AP CPU ROM
c - UART control passed to CM3 CPU ROM

Any ideas?…
I also still have no idea what to do about a messed up U-boot, if that is what is going on… There is no info on the wiki on u-boot, and I am pretty new to anything more complicated than a raspberry pi when it comes to SBCs, so I am pretty used to the lazy “download a .img file and apply it to an sd card.

I’m pretty confident in my ability to learn, I just need a point in the right direction, maybe a link to some articles explaining how this stuff works. Google has not been helpful at all in that respect.

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