Duo module 01 emmc flash

General
23

thanks, this is great, now we know this behaviour is normal.
the second, remaining question still stands: how to boot the thing without sd card?

to answer it, it would greatly help if you followed the guide here to flash emmc, and tell me if it worked? without plugging in the sd, of course

p.s. do you have a button labeled “recovery” on EVB?

2 Likes
24

So after some debugging, with the EVB

You need follow this

look topic

“eMMC version firmware burning”

Solder a USB A cable to USB-DP, USB-DM and GND, no extra is required, the device will “act” as USB modem after power up, maybe disable other USB-modems

You need this CVI USB aka driver, install and keep the program running

This is important

EDIT:

The device will “cycle” through some boot sequence, so patience is needed.

I did the test on my linux machine, without the tool, but I can see the debug output on serial

2 Likes
25

While @l4l4l4l4 says there’s no output over the serial line.

26

you rock, dude. will post an update here once I have time to get back to this.

1 Like
27

I don’t know.

With my first “quick and dirtry” test yes.

After my “debug” session, I think no.

They must be some “early” boot loader inside the Soc, like the Rockchip or Allwinner does.

1 Like
28

Glad to hear.

So I can do further work on drivers

1 Like