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I haven't opened mine up but from what I've seen posted on here there is no visible serial port. The Linux OS sees one and there's even a dormant configuration section for running a getty on it in the inittab, it also seems to be streaming debug/diagnostic output from micom .
It is likely to just be a pin pad used for internal testing.
I was thinking more of getting the startup info from the cfe bootloader and similar stuff.
A pin pad is fine, I just wanted to know if anyone tried it and if there actually was any output at all on it before I bring out the soldering iron...
If someone tried it, a pin-out would be help full as well...
Or is there maybe an accessible jtag...
It's not the kernel output I'm interested in. It's the bootloader output...
And I have a different software as well since I'm in sweden... Our model is called BXR-HD+ but it is more or less a HDR-FOX T2, main chip is the same and the pcb is almost the same (no 1080p upscaling and smart card reader instead of CI-slot).
And no, such signals isn't available on the CI-slot (CAM-slot) as far as I know.
I've found some stuff in the cfe bootloader but need someone with a hd-fox or hdr-fox to verify it for me (it doesn't work with my bxr-hd+ version).
Is there anyone that has a serial to usb cable, a null modem cable, a computer with a serial port (or a second usb to serial cable) and a hd or hdr box and is willing to do the following simple test, I'd be thankful.
I will not ask you to send any data to the box, just listen for data from it.
Connect the serial to usb cable to one of the humax usb ports and the other end of it to the null modem cable and the other end of that to the computer's serial port.
Start a serial program like tera term (google/wikipedia) and log the output as binary data. Serial port should probably be at 115200, 8, n, 1, but I'm not entirely sure about the speed.
Reboot the humax and see if you get any data, you must let it go through the loading screen so a power switch reboot or something like that. If you don't get anything, try the other usb port on the humax and/or other speeds.
If I'm correct you will get exactly one byte of data with the value 0x02 so it's not sure it will print on screen.
You don't need a computer with a serial port. Use the following setup: HUMAX_USB<->Serial<->null modem cable<->Serial<->COMPUTER_USB.
Two serial to usb cables with a null modem cable between the two male rs-232 serial connectors.
I'm using that setup here but don't get much out of my box. And yes, I've verified the serial stuff between two computers.
No, I hadn't seen that earlier. Seems like ttyS2 is the remote input then... Which makes me wonder what the three pin header places on the board are, they can't all be serial ports... Hmm...
I would happily send 0x06 if I could get my humax (swedish version of HDR called BXR-HD+) to actually send 0x02 on any port.
Or does it require some kind of input first?
Tonight, I have investigated all three possible internal uart connections (4 holes each to clearly hold pin headers) but none of them writes any serial data. And yes, I used a voltage level converter to convert the cmos-levels to proper rs232 levels.
I know at least the middle one sends some kinds of pulses so my next guess is USB which fits nicely with the pinout of +5V, 3.3V signalling on 2 pins and gnd on the fourth. But getting a reliable USB signal from four soldering pads is kind of hard...