[koutsouk]

Originally Posted by __fred__

Yes, and I'm pretty sure now that the boot loader does no CRC checks or whatever. So I'm going to patch a few MCUs to see that I can disable the auto dimming.

I also have a CANBUS analyzer that can put signals on a CAN bus to emulate the light signals. So I can first test it on my desk. I'll try and do that this weekend.



As I cannot read the flash yet using the original bootloader I'm still dependent on MCU updates from the net. I'll post a list on the wiki of all the MCU's I already have. Please send me your own if you want it patched for the auto dimming.

Another thing that you could see is the shutdown period.
Many units have options to choose between shutdown times. It would be great if we could manage to shutdown the unit after let’s say 10 minutes. With that we could go to a store for a quick shopping or refueling and navigation be still alive without the need to configure it again.
I think that this an MCU matter also !

[renedis]

Originally Posted by __fred__

Well, let's not wipe your unit as well ;-) But if you could take a picture of your settings page if it's a Mekede unit i'd be glad.

Yes, it's a Mekede. I used to own a NewsMy NU3001 with full source code found on the internet where I also did some work on. They had a great MCU learning app. Maybe it can help you out in the future. NU3001 Github is here.

Originally Posted by Svenson

Sure?...i think 6pin-LVDS is NBT, CIC-Unit has 4pin-LVDS
Or i'm wrong?

100% sure it's a CIC unit. I've got a CIC controller wheel and CIC menu. Couldn't find any fitting unit for my car (early 2013 F30 335i) and e-mailed Mekede on AliExpress if they could provide a 4-pin unit, they said I've got a 6-pin unit?!

I took out the original screen to take a look at the connector and they were right.. I've got a 6-pin LVDS connecter with a CIC HU.
BMW made several "transition" models, that's the reason why I'm having the weird 6-pin/CIC combo.


FYI for other people:
Mekede (AliExpress) told me they don't sell the 6-core unit with 1980*720/4GB unit because of heat issues. There are also Qualcomm versions which have a lot of software issues.
Therefore I went with the traditional way by buying a 1280*480/2GB version.

[renedis]

https://forum.xda-developers.com/and...-octa-t3575155

This shows various information/updates. Also a Android 9.0 update for the PX6:
PX6 HA2_rk3399_9.0(20190528) https://www.sendspace.com/pro/dl/xvxhj8 (disclaimer: no guarantee it works)

[__fred__]

So my CAN analyzer / sender works. I can control the brightness with CAN packets. Next thing is flashing a modified firmware to make sure that it does not change brightness anymore!

[Guerillah]

Is there an updated ROM/software for the Android 8.1 PX6 head unit for F30? I got one of the first ones and it definitely has bugs that maybe have been corrected. The seller is not being helpful.

Current ROM

[__fred__]

So I did it. I patched the ROM for the test unit and it works. No more dimming when the lights turn on.

The patch itself is simple once you have found what you are looking for:



To the right the original code. It compares A value on the stack with the hex value FE (=254 in decimal). this is part of a bigger CAN frame for the dashboard Brightness. It's either 0 to 9. Or OFF, which is encoded with FE.

When the byte equals FE, a variable in memory (I have called it night_enabled) is set to 0. Otherwise the variable is set to 1.

The patch just compares the byte value with itself. Now we always jump to the part that sets night_enabled to 0. (If it isn't already 0).

So night_enabled is always zero from now on.

I've confirmed that it works. Last thing I will do is flash my own production unit to make sure that there aren't any checksums or CRCs in the original bootloader. But then I'll be able to start patching all MCUs that I can find.

[Kri]

Originally Posted by grzegorz914

Hi,

I get Today from my seller Android Image 8.1 and MCU update for (CCC, CIC, NBT), PX6 BMW F10 NBT.

https://drive.google.com/file/d/15h_...ew?usp=sharing

Hello

does your picture show your Android before or after the update ?

My E series 10.25" does have pretty the same setup
only difference is that my MCU is CIC with date vom 190118, so newer than your screenshot.

* MCUVer "023042bGS-CIC-HW7-190118[B1280_170325]
* FramworkVer: 8.1.0 OPMS5.171019.019 eng.zxw.20181228.162012
* AndroidVer: 8.1.0
* AppVer: 2019030801_1280x480_970
* Nanadflash: 19.27G/24,83G
* Ram 2G
* UUID: 010E6A88-3BFD-00B6-0000-000100001A88

are my thoughts correct that the MCU Update may work for my HU ?
and the Android Update does also probably work for them ?
maybe the only differcence are the different display connectors and different MCU files ?

What i`m curious is that the MCU update you got does have CCC CIC and NBT
CCC was definitly only a E series system with 100 kbit/s CAN bus.
NBT is only 500 kbit/s Can.
but how does the HU handle with CIC, as E series CIC have 100kbit/s but F series have 500 kbit/s can bus speed ?

is there any how-to how to install the Android OS again ?
I have some troubles with it (not able to get rid of the lock screen,no real bluetooth ect) and want to install the OS again to have everything back to work again.

sincerely Chri

[Svenson]

The MCU upgrade in this package has 3 Files, for CCC, CIC and NBT. One for one system.

[Kri]

Originally Posted by Svenson

The MCU upgrade in this package has 3 Files, for CCC, CIC and NBT. One for one system.

Yes i know, but there are two CIC versions vom BMW, thats what i meant.

Chri

[Svenson]

That's not relevant i think. Same can protocol, only different speed.

[Kri]

Originally Posted by Svenson

That's not relevant i think. Same can protocol, only different speed.

But different speed normally always goes hand in hand with protocol changes ?

unfortunateley i have not the equpment to scan F and E series CIC controller to compare the values.

sincerely Chri

[Svenson]

Ethernet, 10Mbit, 100Mbit, 1000Mbit has the same protocol and different speed. Or?

[Kri]

Originally Posted by Svenson

Ethernet, 10Mbit, 100Mbit, 1000Mbit has the same protocol and different speed. Or?

Yes ok thats true, i mixed it up with the speed itself.

so then the can speed is not defined within the MCU configuration ?

sincerely Chri

[Svenson]

Do not worry, use the file to your device. It will work.

[Kri]

Originally Posted by Svenson

Do not worry, use the file to your device. It will work.

Thx, at least it seems i have already this version installed, this was only to confirm for future use

my primary issue is the android itself, and the question how i can install this by myself ?
Or can i even go to the Android 9 update, but then how ?

sincerely Chri

[Svenson]

Android 9 on this devices is very new and very buggy, i think. I would not use.

[Kri]

Originally Posted by Svenson

Android 9 on this devices is very new and very buggy, i think. I would not use.

Ah ok, then i better stay with Android 8.

Does someone have a link to the latest Android 8 APP image ?
grzegorz914 APPVer. image is from december 2018, but mine has already an march 2019 version.

sincerely Chri

[Svenson]

Use this 20190505.
https://www.bimmerpost.com/forums/sh...php?p=24830912

[Kri]

Originally Posted by Svenson

Use this 20190505.
https://www.bimmerpost.com/forums/sh...php?p=24830912

I already used the OEM file from there for bringing back my ID menu`s , but thought the Android may not work because on the pictures is a E39 listed
But when i can try this rom.
the thing is now how can i come into recovery mode on the PX6 Display ?
It does not have an powerswitch, only reset, and also no debug/recovery solderpoints like the PX3 Boards ?

sincerely Chri

[Svenson]

For what do you need recovery mode. Is your display not normally running?

[Kri]

Originally Posted by Svenson

For what do you need recovery mode. Is your display not normally running?

To update the System ? my unit has no update function active at the Android system itself.
Edit: my main issue is that it does not load directly into the Anbdroid BMW GUI, its showing a lockscreen when it does start.

sincerely Chri

[Svenson]

Originally Posted by Kri

To update the System ? my unit has no update function active at the Android system itself.

sincerely Chri

Don't need this.
Download the update, copy the px6.zip to a clean FAT32 formatted USB stick and insert it on the usb connector from the device. Wait a moment then will pop up a window for starting the update.