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Raxone / amlogic-usbdl_s905x3

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question about UART Debug tool for X88proX3 #2

Closed araczkowski closed 1 year ago

araczkowski commented 1 year ago

I'm trying to check the boot logs on the device, I'm using CuteCom for this

image

I checked different connection settings but there are no data on /dev/ttyUSB0

on your video I saw that it works for you image

what program are you using? do I have to do something special to see the logs? It works fine for my other boxes but not for X88proX3

image

I'm wondering that maybe something is physically missing on my board...

Raxone commented 1 year ago

In picture i don't see where you connect uart. I use picocom but that is not important baudrate is 115200 not 19200

araczkowski commented 1 year ago

I compare my X88proX3 board with the same board picture from the Internet and it looks that on my board there is no path from RX TX to SoC - look on the pictures below

Correct paths - board picture from the Internet: image

My board - no paths from RX TX pins to SoC: image

Do you know (can you check via electronic meter) if these RX TX pins are going straight to the SoC S905x3 pins ,or maybe there are some other places on the board where I can connect to RX TX?

Raxone commented 1 year ago

2 places for uart is, from (bl1) and sdcard/to uart(bl2). If uart is ok connected to cpu it must have some voltage on tx/rx. In my case rx 0.5v and tx 3.3v when it is board powered. When board power off the test with diode mode voltage drop in my case is 1.000 for tx and rx.

On Tue, Aug 8, 2023 at 4:58 PM Andrzej Raczkowski @.***> wrote:

I compare my X88proX3 board with the same board picture from the Internet and it looks that on my board there is no path from RX TX to SoC - look on the pictures below

Correct paths - board picture from the Internet: [image: image] https://user-images.githubusercontent.com/1263968/259139563-7649e292-00d9-4490-8aae-f34deb3bb9cf.png

My board - no paths from RX TX pins to SoC: [image: image] https://user-images.githubusercontent.com/1263968/259139081-949e2237-ea96-497d-a137-60798b677957.png

Do you know (can you check via electronic meter) if these RX TX pins are going straight to the SoC S905x3 pins ,or maybe there are some other places on the board where I can connect to RX TX?

— Reply to this email directly, view it on GitHub https://github.com/Raxone/amlogic-usbdl_s905x3/issues/2#issuecomment-1669785924, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAN7JFCRXFDITWLEFRPVZLDXUJHZVANCNFSM6AAAAAA3IRJR2U . You are receiving this because you commented.Message ID: @.***>

araczkowski commented 1 year ago

thanks @Raxone for the answer it was very helpful, I tried but unfortunately I was not able to connect and debug the boot anyway I will close this, because I do not have any idea how to make this work