Flashing SD card over USB

[MarkHaysHarris777]

Hello all,

I'm developing my own PCB around the A64 and am currently using a Pine64 to develop my flashing procedure (want to have just eMMC on the board).
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After chatting with marcushh777 on the #Pine64 IRC channel, 
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Does anyone have any suggestions for how I can proceed from here?

I told you on the irc that this discussion is beyond the scope of the irc chat room, and the Pine forum.

You persist, so I'll give you my opinion;  others are free to join in to.  The ideal setup is to have both eMMC and SD bootups;  in an ideal world also SPI flash.

boot priority:   SPI flash ---> SD card ---> eMMC

Having only a single mode of booting is restrictive and a PITA frankly.  I will give you an example of this:  the Rock64 is supposed to be able to be loaded with an RK tool that will load the eMMC ;  the problem is that it doesn't work well, and unless you know what you're doing (not noobs) it doesn't work at all, and ofc requires some setup or it does not work period. The way I'm loading my eMMC on the Rock64 board is by using another image on the SD card and then 'curl' -ing the image from the network directly to the eMMC.

I will give you another example;  the pinebook uses both eMMC and SD card !  I have my primary image on the eMMC, and I have four secondary images (two 32G, two 64G) in my man bag with the pinebook;  these images are for different purposes ;  but one of the purposes beyond dual booting is the ability to cross-backup between the SD cards and the eMMC;  this has been fantastic;  and most recently I'm experimenting with using the SDIO for gpio control;  something entirely not considered in the design phase.


The Pine forum and the irc channels  #Pine64, #Padi, #Rock64, exist to discuss Pine products, not to facilitate building competitive products. That is not to say that Pine related dev will not be discussed that might help you;  to the contrary;  however, the irc nor the forum are designed to teach kernel dev image building, nor the development of competitive products or product schemes. The dev community is here to support the development of software(s) for the Pine products specifically.