[Diy_efi] PCM/ECM wish list question

[Steven P. Donegan]

Thank you for the feedback. What do the Main relay driver and the SES
lamp driver actually do? I had not thought of OBDII at all as the system
talks via RS-232 already. I suppose to make it a complete
plug-compatable unit OBDII will be required. I have no intention of
feeding any data to the car's black box (ie the air bag controller)
other than that required for the air bags to function.

On Sat, 2006-12-30 at 06:28 -0800, K DANIEL wrote:
> Hi
> The following are missing from the output side 
> Main relay driver
> Fuel pump relay driver
> IAC drivers
> SES lamp driver
>  
> Nothing is mentioned about the on board diagnostic such as the OBDII which is very important 
> Kamal Daniel
> 
>  
> ----- Original Message ----
> From: Steven P. Donegan <donegan at donegan.org>
> To: diy_efi at diy-efi.org
> Sent: Friday, December 29, 2006 8:39:16 AM
> Subject: [Diy_efi] PCM/ECM wish list question
> 
> 
> I am designing an ECM/PCM (based on an LPC2138 ARM CPU). So far I have
> the following inputs:
> 
> Manifold Absolute Pressure
> Manifold Air Temperature
> Coolant Temperature
> Oil Temperature
> Oil Pressure
> Detonation Sensor
> Throttle Position
> Mass Air Flow (GM frequency style)
> 4(ea) O2 sensors (my vehicle has 2 pre-cat and 2 post cat sensors)
> Crank Position Sensor
> Cam Position Sensor
> 
> What if anything am I missing on the input side of things?
> 
> On the output side of things I have:
> 
> 8(ea) coil-on-plug triggers
> 8(ea) injector triggers
> 
> FYI - this will be an open source project similar to Megasquirt. All
> code will be written in C under the FreeRTOS operating system. Right now
> the hardware design looks like a primarily passive 'motherboard' with
> daughter cards for the analog inputs, the outputs, and the CPU (see
> www.olimex.com and the LPCH2138 part for the CPU description). For those
> who have 1998-2000 LS1 based Camaro's this will be intended to be a 100%
> direct replacement for the stock computer.
> 
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> Subscribe: http://lists.diy-efi.org/mailman/listinfo/diy_efi
> Main WWW page:  http://www.diy-efi.org/diy_efi
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> Subscribe: http://lists.diy-efi.org/mailman/listinfo/diy_efi
> Main WWW page:  http://www.diy-efi.org/diy_efi