How to Write an Image to the eMMC Module Tutorial

[jl_678]

Mark, excellent. Thank you.

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[Lexstar]

I also have ported ayufan's script to the rock64 -- rock64_install_to_emmc,  which further simplifies things by allowing the user to select the system and version, as well automatically generating the curl file;  very nice.

Does the script automatically interrupt the uboot timer or is it just for everything after step 6?

[MarkHaysHarris777]

I also have ported ayufan's script to the rock64 -- rock64_install_to_emmc,  which further simplifies things by allowing the user to select the system and version, as well automatically generating the curl file;  very nice.

Does the script automatically interrupt the uboot timer or is it just for everything after step 6?

The script helps only after the SD is fully booted;  well, its a gnu+linux bash script, it doesn't work at boot-up.  Interrupting uboot is manual, based on the feedback received on the serial console alone.

[MarkHaysHarris777]

I have updated this thread with the information from this link:

[jl_678]

Would you see the same output from a monitor if you do not have a serial cable? I am just wondering whether you can get away with that approach.

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[fire219]

Would you see the same output from a monitor if you do not have a serial cable? I am just wondering whether you can get away with that approach.

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From the guide (with emphasis):

 The serial console is very important because the normal display does not show boot-up messages!

Technically you could try to time it blind, but unless you already know how the boot output over serial looks you are unlikely to get it right.

[jl_678]

Sorry, I read it too fast. Thank you.

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[hirot78]

Technically you could try to time it blind, but unless you already know how the boot output over serial looks you are unlikely to get it right.

Yesterday I tried to it blind.
When I removed the jumper 3 seconds after turning on the power, writing the image succeeded.
However, this method may be dangerous. Then I will try to it by using a serial adapter (CP2104) tonight.

[fire219]

Technically you could try to time it blind, but unless you already know how the boot output over serial looks you are unlikely to get it right.

Yesterday I tried to it blind.
When I removed the jumper 3 seconds after turning on the power, writing the image succeeded.
However, this method may be dangerous. Then I will try to it by using a serial adapter (CP2104) tonight.

Well done. It's definitely not impossible to do, it's just a bit difficult.

Also, welcome to the forums. 

[tarlo766]

Experienced IT guy here, but noob to SBC. I just wanted to make sure I got this right.
Do I need a serial terminal to install Android to the eMMC or just to install linux to the eMMC? (per fire219 on 08-15-2017, 02:05 PM).
If so does the CP2102 module USB to 3.3V TTL referenced in the tutorial require soldering to the rock64?
if so are their guides for it? Thanks for the support.