FG Mk2 ICC CAN messages

[lcsingleton]

RE https://github.com/jakka351/FG-Falcon/wiki/CAN_id,-frame-database

HVAC Controls, Byte 4:

For the FG2, this is the internal temperature (from the cabin air sensor on the keypad),
This should be to 0xFF when there is not temp (the keypad is disconnected from the FDIM).
I am yet to determine the exact scalar to calculate it to celcius.
This is 10K NTC connected through pins 25 and 24 (I think 25 is the ground pin) to the FDIM from the keypad.
This is then interpreted by the FDIM daughterboard.

I can't determine the correct scalar as my FDIM has gone blank. The closes I can get is 0x85 is somewhere around the 22-30 C area.

Is there any chance you could take some snapshots at different cabin temps?

[jakka351]

Sorry haven't got any data from a mark 2

[lcsingleton]

Bummer. Did you end up getting anywhere or making much progress with the OpenICC project?
I'm hoping to replace my FDIM and ACM with an off-the-shelf Android Head unit.
The ACM plug is a pain, it's a custom molding for the BA-FG. Aerpro aren't willing to sell their wiring harness (which has the plug in it) as a standalone product.
I've done a fair bit of reverse engineering of the CAN and the connectors on the boards, and know what CAN messages need to be sent to the Cluster to keep it happy.
I've done a bit of research into how the CAN decoders work with the android head units.

[jakka351]

The big problem is keeping the ICC buttons functional, as they are managed by the FDIM. If you remove it you have no ICC button functionality

[lcsingleton]

Yeah, I think that's all overcome-able with an Arduino and a CAN shield.
Luckily the ICC buttons are just matrixed together on the board and the (seemingly) raw output from the carbon contacts is connected to the header pins. i.e. no signal processing or analog to digital conversion is done on the keypad board, it acts purely as an interconnect board to the FDIM.

The FDIM takes the button presses and cabin temp and splits them into two logical groups of can messages 0X2FC for the Media Controls and 0x307 or HVAC and Operational Controls (cabin temp, DSC, cabin temp, etc)

With the help of a multimeter and some pin-scanning I've been able to determine (reverse engineer) what I think are all (SZ Climate Control) of button combinations.

Beyond the buttons, the only other things on the board are the keypad backlights, which are connected to pins 1 (0-14V) and 2 (ground) [the FDIM does some processing around the sun load sensor and changes the brightness of the backlight based on the outside light level], the rotary encoder which is connected to pins 22, 23, and 26 and the NTC which is connected between 25 and 24 as said previously.
See the excerpt of the code I've been working on

	{ FdimButtonType::HVAC_OFF, 		InterconnectPin::ELEVEN, 	InterconnectPin::SIXTEEN, "Toggle HVAC"},
	{ FdimButtonType::RECIRC, 		InterconnectPin::TWELVE, 	InterconnectPin::SIXTEEN, "Recirc/Fresh"},
	{ FdimButtonType::AC, 			InterconnectPin::THIRTEEN, 	InterconnectPin::SIXTEEN, "Toggle Air Conditioning"},
	{ FdimButtonType::AUTO, 		InterconnectPin::FOURTEEN, 	InterconnectPin::SIXTEEN, "Enable Climate Control"},

	{ FdimButtonType::FAN_MINUS, 		InterconnectPin::ELEVEN, 	InterconnectPin::SEVENTEEN, "Reduce Fan Speed"},
	{ FdimButtonType::FAN_PLUS, 		InterconnectPin::TWELVE, 	InterconnectPin::SEVENTEEN, "Increase Fan Speed"},

	// This is conjecture - I don't have a DZ Climate Control ICC
	{ FdimButtonType::PASS_TEMP_PLUS, 	InterconnectPin::THIRTEEN, 	InterconnectPin::SEVENTEEN, "Increase Passenger Temp"},
	{ FdimButtonType::PASS_TEMP_MINUS, 	InterconnectPin::FOURTEEN, 	InterconnectPin::SEVENTEEN, "Reduce Passenger Temp"},

	{ FdimButtonType::VENTS,		InterconnectPin::ELEVEN, 	InterconnectPin::EIGHTEEN , "Cycle Vents"},
	{ FdimButtonType::FRONT_DEMIST,		InterconnectPin::TWELVE, 	InterconnectPin::EIGHTEEN, "Toggle Windscreen Demister"},
	{ FdimButtonType::DRIVER_TEMP_MINUS,	InterconnectPin::THIRTEEN, 	InterconnectPin::EIGHTEEN, "Reduce Temperature"},
	{ FdimButtonType::DRIVER_TEMP_PLUS,	InterconnectPin::FOURTEEN, 	InterconnectPin::EIGHTEEN, "Increase Temperature"},
	{ FdimButtonType::REAR_DEMIST,		InterconnectPin::FIFTEEN, 	InterconnectPin::EIGHTEEN, "Toggle Rear Demister"},

	{ FdimButtonType::DSC,			InterconnectPin::ELEVEN, 	InterconnectPin::NINETEEN, "Toggle Stability Control"},
	{ FdimButtonType::SCN_AS,		InterconnectPin::TWELVE, 	InterconnectPin::NINETEEN, "Scan Radio"},
	{ FdimButtonType::SOURCE_MEDIA,		InterconnectPin::THIRTEEN, 	InterconnectPin::NINETEEN, "Cycle Media Audio Sources"},
	{ FdimButtonType::SOURCE_FM_AM,		InterconnectPin::FOURTEEN, 	InterconnectPin::NINETEEN, "Cycle FM, AM Audio Sources"},
	{ FdimButtonType::BACK,			InterconnectPin::SIXTEEN, 	InterconnectPin::NINETEEN, "Back"},

	{ FdimButtonType::SOURCE_CD,		InterconnectPin::ELEVEN, 	InterconnectPin::TWENTY, "Select CD Audio Source"},
	{ FdimButtonType::OK,			InterconnectPin::TWELVE, 	InterconnectPin::TWENTY, "OK"},
	{ FdimButtonType::MENU,			InterconnectPin::THIRTEEN, 	InterconnectPin::TWENTY, "Menu"},
	{ FdimButtonType::SEEK_LEFT,		InterconnectPin::FOURTEEN, 	InterconnectPin::TWENTY, "Seek Lower"},
	{ FdimButtonType::SEEK_RIGHT,		InterconnectPin::FIFTEEN, 	InterconnectPin::TWENTY, "Seek Higher"},

	{ FdimButtonType::HAZARD,       	InterconnectPin::FIVE, 		InterconnectPin::TWENTY_TWO, "Toggle Hazard Lights"},
	{ FdimButtonType::AUDIO_POWER,  	InterconnectPin::SIX, 		InterconnectPin::TWENTY_TWO, "Toggle Audio Power"},
	{ FdimButtonType::EJECT,        	InterconnectPin::SEVEN, 	InterconnectPin::TWENTY_TWO, "Eject CD"},
	{ FdimButtonType::LOCK,       		InterconnectPin::EIGHT, 	InterconnectPin::TWENTY_TWO, "Lock Car Doors"},
	{ FdimButtonType::UNLOCK,       	InterconnectPin::NINE, 		InterconnectPin::TWENTY_TWO, "Unlock Car Doors"},
	{ FdimButtonType::INTERIOR_LIGHT, 	InterconnectPin::TWELVE, 	InterconnectPin::TWENTY_TWO, "Toggle Cabin Light"},

[jakka351]

cool