Building firmware for XC90

[liamstears]

I am new to this so I apologize in advance

I would like to build the firmware for a volvo_od2 for use in an XC90

I assume to function I only need to update addresses of my modules at the end of canbox/cars/xc90_2007my.c?

What confuses me the most is how do I find all the addresses of my modules to be able to do this?

I really hope you can...

Edit: Also link to Virtual machine (https://drive.google.com/file/d/1XCHW03gKX6WUB6tFS7kKD0kZkctj8inW/view?usp=sharing) is down I cannot download...

[smartgauges]

hello, in general terms, yes you need to modify the addresses in the CAN handlers,
the address of the modules changed depending on the year of manufacture.
one man is currently doing support for all model years for the xc90, i think that after a while i will publish his work

[liamstears]

hello, in general terms, yes you need to modify the addresses in the CAN handlers, the address of the modules changed depending on the year of manufacture. one man is currently doing support for all model years for the xc90, i think that after a while i will publish his work

This sounds amazing, do we know how his work is progressing? Do we have any link to his work? I would very much like to incorporate this into my XC90...

[liamstears]

hello, in general terms, yes you need to modify the addresses in the CAN handlers, the address of the modules changed depending on the year of manufacture. one man is currently doing support for all model years for the xc90, i think that after a while i will publish his work

I have looked into everything, my year is same year as your code so I think I can flash directly and it will work. I have ST-Link V2 and spare OD-Volvo-02 canbus box. Is there an easy set of instructions of how I can flash? Preferably on Windows? Thanks

[smartgauges]

Hello, this is a new link to an image with programs for updating the firmware
https://drive.google.com/file/d/1N1e5lfgBMYpkn2jB6EhOwpE1DNGCGoEL/view

[liamstears]

Hello, this is a new link to an image with programs for updating the firmware https://drive.google.com/file/d/1N1e5lfgBMYpkn2jB6EhOwpE1DNGCGoEL/view

After becoming root user (sudo su) and installing openocd (apt-get install openocd) I got it to run but I'm getting an error (unable to connect to the target)

Any ideas?

Screenshot: https://ibb.co/rc1KN9m

EDIT: It looks like that error is because I have to catch it immediately when connected or it doesn't connect. So I connect 3v pin and immediately run make flash and it runs but this time with a different error:

UNEXPECTED idcode: 0x2ba01477
expected 1 of 1: 0x1ba01477

Screenshot: https://ibb.co/ySjwfps

[liamstears]

Ok I got it to flash

What I did was I searched for stm32f1x.cfg and found this file 3 times, I changed "0x1ba01477" to "0x2ba01477" in all 3 of these files

The flash looks to have completed successfully

However I still have the error that I cannot read from serial output properly, my serial output even at 38400 is just scrambled

Screenshot: https://ibb.co/hRNYLTJ

I hope you can help...

[liamstears]

Wait I got it!

I had to copy and paste "OOOOOOOOOOOOO" to get the code in quick enough, I have successfully changed it to XC90

I found though that the configuration page flashes on and off and only stays on screen for a set amount of time so configuration changes have to be made quickly.

Next I will test in the car, fingers crossed

[liamstears]

Initial test in car is it is working!

Unfortunately though it's not working perfectly

Door open messages - Work perfect
Parking sensors - Working but I only have rear sensors but display shows them as front and rear sensors, maybe a setting on head unit I am unaware of?
Reverse trajectory lines - Although these work they move in the wrong direction for my car (right hand drive UK car) I wonder if this is because of a difference between left and right hand drive cars? Is there a way to switch these to the right direction?
Can/Steering wheel buttons - Only skip track buttons work, they work and I can map them, no other canbus buttons work though :-( I have lost volume buttons, I hoped more buttons would work

I guess all of this can be fixed in the configuration before flashing the compiled firmware to my canbus box but I am new to this so it may not be easy for me to work out lol

EDIT: canbox.c

Would changing:

uint8_t fbuf[] = { 0x00, 0x00, 0x00, 0x00 };
fbuf[0] = fmax[0] + 1 - scale(radar.fr, 0, 99, 0, fmax[0]);
fbuf[1] = fmax[1] + 1 - scale(radar.frm, 0, 99, 0, fmax[1]);
fbuf[2] = fmax[2] + 1 - scale(radar.flm, 0, 99, 0, fmax[2]);
fbuf[3] = fmax[3] + 1 - scale(radar.fl, 0, 99, 0, fmax[3]);
snd_canbox_msg(0x23, fbuf, sizeof(fbuf));

uint8_t rbuf[] = { 0x00, 0x00, 0x00, 0x00 };
rbuf[0] = rmax[0] + 1 - scale(radar.rl, 0, 99, 0, rmax[0]);
rbuf[1] = rmax[1] + 1 - scale(radar.rlm, 0, 99, 0, rmax[1]);
rbuf[2] = rmax[2] + 1 - scale(radar.rrm, 0, 99, 0, rmax[2]);
rbuf[3] = rmax[3] + 1 - scale(radar.rr, 0, 99, 0, rmax[3]);
snd_canbox_msg(0x22, rbuf, `sizeof(rbuf));

to:

uint8_t fbuf[] = { 0x00, 0x00, 0x00, 0x00 };
fbuf[0] = fmax[0] + 1 - scale(radar.rl, 0, 99, 0, fmax[0]);
fbuf[1] = fmax[1] + 1 - scale(radar.rlm, 0, 99, 0, fmax[1]);
fbuf[2] = fmax[2] + 1 - scale(radar.rrm, 0, 99, 0, fmax[2]);
fbuf[3] = fmax[3] + 1 - scale(radar.rr, 0, 99, 0, fmax[3]);
snd_canbox_msg(0x23, fbuf, sizeof(fbuf));

uint8_t rbuf[] = { 0x00, 0x00, 0x00, 0x00 };
rbuf[0] = rmax[0] + 1 - scale(radar.fr, 0, 99, 0, rmax[0]);
rbuf[1] = rmax[1] + 1 - scale(radar.frm, 0, 99, 0, rmax[1]);
rbuf[2] = rmax[2] + 1 - scale(radar.flm, 0, 99, 0, rmax[2]);
rbuf[3] = rmax[3] + 1 - scale(radar.fl, 0, 99, 0, rmax[3]);
snd_canbox_msg(0x22, rbuf, sizeof(rbuf));

Fix the reverse trajectory turning the wrong way with the steering?

[liamstears]

Hello, this is a new link to an image with programs for updating the firmware https://drive.google.com/file/d/1N1e5lfgBMYpkn2jB6EhOwpE1DNGCGoEL/view

Ok so it turns out the trajectory problem can be fixed simply in the software so that's not an issue :-D

The biggest problem is canbus buttons. Volume buttons no longer work. Also would be nice if I can get phone buttons working.

Can you please help try to fix this...

[liamstears]

It is a shame for the lack of support on this because this would be a great solution for XC90 but unfortunately all functions do not work.

For anyone else looking at this for XC90 this is what I have found:

Door open messages - Work perfect
Parking sensors - Working but I only have rear sensors and the display shows them as front and rear sensors
Reverse trajectory lines - These work but initially in the wrong direction but this can be corrected in settings on the head unit
Can/Steering wheel buttons - Only skip track buttons work and I can map them, no other canbus buttons work though
Brightness/Dimming - This does not work

To fix steering wheel buttons and have brightness dim I will have to use another canbus box unfortunately

[smartgauges]

Hello, unfortunately I cannot help you with xc90 support, because I am not the owner of xc90. My friend has an xc90 and all the functionality of the adapter works correctly on his xc90.
The fact is that different model years xc90 have different addresses in CAN blocks, so you need to determine the necessary addresses for your car yourself

[liamstears]

Hello, unfortunately I cannot help you with xc90 support, because I am not the owner of xc90. My friend has an xc90 and all the functionality of the adapter works correctly on his xc90. The fact is that different model years xc90 have different addresses in CAN blocks, so you need to determine the necessary addresses for your car yourself

I understand this but what doesn't make sense is buttons on steering wheel. Skip track works but volume doesn't. These are both on the same module and same coding should be used to access them so if skip tracks is working volume should work too unless there is some error in coding for this firmware.... I don't see another explanation

Brightness/dimming, I now have this working, for some reason on bench testing the changes I made to adapt brightness trigger setting did not save and I did not realise this, when connecting to car and changing settings I set it to I think 94 and now it works perfectly 😁

So again because all other functions work buttons must be your firmware issue. Maybe it is simply a typo in your code? I don't understand your code enough to work it out. Also because there is phone buttons in theory you should be able to make these work too as these are all on same module so same can address.

I have seen somewhere a list of available buttons can messages, I will see if I can find them for you to look at, maybe with this information you may see something that I am unable to understand which may help get a fix.....

[smartgauges]

The handling of the volume buttons on the xc90 is now commented out, so they don't work.
just change #if 0 to #if 1 in line https://github.com/smartgauges/canbox/blob/main/cars/xc90_2007my.c#L128
and recompile a project
My friend uses android with stock audio via aux so he doesn't have to control android volume with buttons

[liamstears]

The handling of the volume buttons on the xc90 is now commented out, so they don't work. just change #if 0 to #if 1 in line https://github.com/smartgauges/canbox/blob/main/cars/xc90_2007my.c#L128 and recompile a project My friend uses android with stock audio via aux so he doesn't have to control android volume with buttons

Thank you, yes I thought it must be something simple :-D

I have found the information I was looking for, with it do you think you could add extra buttons for XC90?

This is the page:
https://github.com/olegel/VolvoCan/blob/master/doc/VolvoModules/swm.txt

As you can see all buttons send basically the same message just very small difference, I don't know how your coding works but I really hope with this you can add them?

There is also more info in other pages like:
https://github.com/olegel/VolvoCan/blob/master/doc/VolvoModules/ccm.txt
Here there is button to turn on/off park assist, this would be useful button but not as important

Really I hope you can look at the steering controls and add more....

[liamstears]

I have read your code many times, I understand if I wanted to add a new button I would have to add to canbox.c, canbox.h, car.c, main.c and xc90_2007my.c

What I don't understand is what exactly I would need to add to canbox.c using example a new button called "NEWBUTTON"

void canbox_NEWBUTTON(void)
{
	if ((e_cb_raise_vw_pq == conf_get_canbox()) || (e_cb_raise_vw_mqb == conf_get_canbox())) {

		uint8_t buf[] = { 0x09, 0x01 };  (Here, what do I put?)
		snd_canbox_msg(0x20, buf, sizeof(buf));

		buf[1] = 0x00;
		snd_canbox_msg(0x20, buf, sizeof(buf));
	}
}

Also in xc90_2007my.c

key_state.key_NEWBUTTON = STATE_UNDEF;

uint8_t key_prev = msg[7] & 0x01; (Here, what do I put?)

if ((key_state.key_NEWBUTTON == 1) && (key_NEWBUTTON == 0) && key_state.key_cb && key_state.key_cb->NEWBUTTON) key_state.key_cb->NEWBUTTON();

key_state.key_NEWBUTTON = key_NEWBUTTON;

The main buttons I want to add are enter and exit buttons from the link I posted previously, can you please help and point me in the right direction?