If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
Announcement
Collapse
No announcement yet.
Announcement
Collapse
No announcement yet.
How to Unbrick Amlogic s805,s802, s812, s905 Video Tutorial
Is it the MXIII-G 4K 2/16GB? have you opened the box to see the PCB?
Ballz2k7 There is no serial port on those devices. I have prolific USB cable, but where to connect. I suppose somehow they must redirect their console to some UART, but where?
Looking at the dropbox pictures, use the one of the full board, top view. Just behind the power jack there are 4 pads marked vcc, gnd, dp, dn. Im pretty certain you will find those are the serial data lines. Connect your data+(dp) and data-(dn) and gnd wires to the pins (probably better fitting a few pin headers so you can plug/unplug.) From here using a terminal program and settings 115200 baud, 8 stop bits, no parity you should see a log of the box starting up, from here it is at times easier to see what the processor is doing, or why its halting. This is how I managed to call the flash tool direct from the cpu and flash an img direct from the sdcard.
Looking at the dropbox pictures, use the one of the full board, top view. Just behind the power jack there are 4 pads marked vcc, gnd, dp, dn. Im pretty certain you will find those are the serial data lines. Connect your data+(dp) and data-(dn) and gnd wires to the pins (probably better fitting a few pin headers so you can plug/unplug.) From here using a terminal program and settings 115200 baud, 8 stop bits, no parity you should see a log of the box starting up, from here it is at times easier to see what the processor is doing, or why its halting. This is how I managed to call the flash tool direct from the cpu and flash an img direct from the sdcard.
Found the Tx/Rx/GND on my PCB but I am not sure if I want to solder pin heads on the board. The seller agreed it is a DOA and asked me to send it back for exchange.
But tried with a prolific cable and some hand made cables , I saw data coming. If I could find a way to read the serial without soldering
By the way did you managed to save your device with a good firmware?
Looking at the dropbox pictures, use the one of the full board, top view. Just behind the power jack there are 4 pads marked vcc, gnd, dp, dn. Im pretty certain you will find those are the serial data lines. Connect your data+(dp) and data-(dn) and gnd wires to the pins (probably better fitting a few pin headers so you can plug/unplug.) From here using a terminal program and settings 115200 baud, 8 stop bits, no parity you should see a log of the box starting up, from here it is at times easier to see what the processor is doing, or why its halting. This is how I managed to call the flash tool direct from the cpu and flash an img direct from the sdcard.
I didn't understand anything yet. Ballz2k7, you are kind enough to post a step by step guide?
Thank you
I didn't understand anything yet. Ballz2k7, you are kind enough to post a step by step guide?
Thank you
We are talking about connecting the PC to the serial transmition of the PCB Rx/Tx and GND via a prolific USB to serial cable or even a serial cable if your PC has serial. That way you get the logs of the device. Usually those devices transmit all logs to serial so that you can debug the device upon getting more visual data to secondary device such as HDMI.
In order to do that you need to open the box, solder cables to the PCBs connectors and connect them to your PC via a cable.
We are talking about connecting the PC to the serial transmition of the PCB Rx/Tx and GND via a prolific USB to serial cable or even a serial cable if your PC has serial. That way you get the logs of the device. Usually those devices transmit all logs to serial so that you can debug the device upon getting more visual data to secondary device such as HDMI..
This I understand, but I don't know which cables or adapters to use, and what software to use.
My PC does not have a serial port.
In order to do that you need to open the box, solder cables to the PCBs connectors and connect them to your PC via a cable
Prolific PL2303 USB UART Cable is what I use, its actually quite old. There are newer items available. Search **** in your country for USB UART. You will find like a usb dongle and some wires that push on the header pins, items are very cheap.
As for software I used Hyperterminal, on windows 8+ its not included and you need to use a 3rd party program called "Hyperterminal", its fine to use the trial period, it works perfectly. Im pretty sure you can use putty for this but I didnt try.
Connect the Rx, Tx and GND pins from your adaptor to the corresponding pins on the board of the mbox.
Setup a new connection in hyperterminal(after installing your usb > uart adaptor), connect to the serial port (COMxx) that got installed with your adaptor. Use 115200 Baud, 8 Data Bits, No Parity, 1 Stop Bits.
Power on your mbox, go straight to the pc and click connect, you should see text appearing in your window containing the bootup log. If it hangs try pressing CTRL-C to interupt the bootup over serial. Then maybe post back the part of the log where it dies.
once your in the UART serial console, if you have a recovery.img on a memory card along with the ini file its pretty simple, just issue the command "sdc_burn aml_sdc_burn.ini" and it will start to flash the image
Prolific PL2303 USB UART Cable is what I use, its actually quite old. There are newer items available. Search **** in your country for USB UART. You will find like a usb dongle and some wires that push on the header pins, items are very cheap.
Connect the Rx, Tx and GND pins from your adaptor to the corresponding pins on the board of the mbox.
Setup a new connection in hyperterminal(after installing your usb > uart adaptor), connect to the serial port (COMxx) that got installed with your adaptor. Use 115200 Baud, 8 Data Bits, No Parity, 1 Stop Bits.
Power on your mbox, go straight to the pc and click connect, you should see text appearing in your window containing the bootup log. If it hangs try pressing CTRL-C to interupt the bootup over serial. Then maybe post back the part of the log where it dies.
Connect the Rx, Tx and GND pins from your adaptor to the corresponding pins on the board of the mbox.
Setup a new connection in hyperterminal(after installing your usb > uart adaptor), connect to the serial port (COMxx) that got installed with your adaptor. Use 115200 Baud, 8 Data Bits, No Parity, 1 Stop Bits.
Power on your mbox, go straight to the pc and click connect, you should see text appearing in your window containing the bootup log. If it hangs try pressing CTRL-C to interupt the bootup over serial. Then maybe post back the part of the log where it dies.
Hi Ballz2k7!
These are the pins to be connected by USB to TTL adapter board PCB
It will arrive?
Thank you
We process personal data about users of our site, through the use of cookies and other technologies, to deliver our services, personalize advertising, and to analyze site activity. We may share certain information about our users with our advertising and analytics partners. For additional details, refer to our Privacy Policy.
By clicking "I AGREE" below, you agree to our Privacy Policy and our personal data processing and cookie practices as described therein. You also acknowledge that this forum may be hosted outside your country and you consent to the collection, storage, and processing of your data in the country where this forum is hosted.
.gif "FacePalm")
, I saw data coming. If I could find a way to read the serial without soldering 
Comment