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Supported Injection Methods
Posted: Wed Jan 25, 2012 1:23 am
by DeuceEFI
Currently the Jaguar is configurable to run:
4 cylinder full sequential injection
6 cylinder semi-sequential injection
8 cylinder semi-sequential injection
In the future the goal is to be able to run:
6 cylinder full sequential injection
8 cylinder full sequential injection
as the hardware has been designed so the user can change jumpers around on the board and replace the 6 resistors that are the current limiting resistors between the CPU and the gate if the FETs to change from semi-sequential to full sequential once the firmware is ready.
Andy.
[Edit 09-22-2012 2213 added 8 cylinder full sequential injection]
Re: Supported Injection Methods
Posted: Wed Jan 25, 2012 1:28 am
by Fred
I take it you liked my suggestion, then :-)
Re: Supported Injection Methods
Posted: Wed Jan 25, 2012 2:07 am
by DeuceEFI
Yes, it only made sense to make it as universal as possible since it wouldn't take much more PCB real estate to make it happen.
Andy.
Re: Supported Injection Methods
Posted: Thu Jan 26, 2012 10:05 am
by DeuceEFI
I have updated the schematics and the PCB board for 8 FETs for injectors, so it will be ready for 8 cylinder sequential injection when the firmware is ready to test
Re: Supported Injection Methods
Posted: Thu Jan 26, 2012 10:07 pm
by Fred
Looks excellent! :-)
Re: Supported Injection Methods
Posted: Thu Jan 26, 2012 10:41 pm
by DeuceEFI
I've just committed the latest round of updates to github, I added another output for an Accessory similar to the Fan and Fuel Pump Relay outputs.
Re: Supported Injection Methods
Posted: Fri Jan 27, 2012 12:23 am
by Fred
If you can, keep all spare outputs on port P. Particularly the 16 bit pins. They're way more useful than the PORT A/B pins. You could move the entire B bank of headers to P, that would give a LOT of flexibility, but also blow away all of your P pins on injection with Sean's code and leave you with no PWM pins if you had 8 injector drivers setup. Hence probably just use P for all of the spare stuff. Not the Fuel Pump, though, that stays on the dedicated pin.
Re: Supported Injection Methods
Posted: Fri Jan 27, 2012 8:26 am
by DeuceEFI
Fred wrote:If you can, keep all spare outputs on port P. Particularly the 16 bit pins. They're way more useful than the PORT A/B pins. You could move the entire B bank of headers to P, that would give a LOT of flexibility, but also blow away all of your P pins on injection with Sean's code and leave you with no PWM pins if you had 8 injector drivers setup. Hence probably just use P for all of the spare stuff. Not the Fuel Pump, though, that stays on the dedicated pin.
I have moved the Fan and Accessory outputs off of port A, but left the Fuel Pump where it was.
Now to use the Fan and Accessory outputs you have to run jumper wires to the appropriate ports, of which I added all 8 Port P outputs to pin headers.
I already had all 8 Port B outputs brought out to pin headers so that we could jumper them to anything in the future...
I also modified the drawing for the XOR chip for the Ignition Timing Advance Output (and DIS Bypass) so that we can select by jumpering the inputs to different CPU output pins so it is flexible for Port T2/T3 or Port P if the user or the firmware developer wishes.
I have committed/pushed my latest changes (minus the Load/Run configuration that you are working on) and even added a couple of .png files of the proposed board from KiCAD.
Let me know your thoughts about the changes I have made... Hopefully I followed your train of thought above...
Time for bed...