[Diy_efi] GCC/ARM LPC21xx assist needed for Donegan ECM/EFI :-)

[Steve Ravet]

> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org 
> [mailto:diy_efi-bounces at diy-efi.org] On Behalf Of Steven P. Donegan
> Sent: Sunday, January 14, 2007 6:22 PM
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] GCC/ARM LPC21xx assist needed for 
> Donegan ECM/EFI :-)
> 
> The hardware in question are the Olimex boards LPC2106 and 
> LPCH2138 - both using Phillips ARM chips. The OS I intend to 
> use is FreeRTOS. Both chips (2106 and 2138) have 
> Capture/Compare registers and there are 'plenty' of available 
> timers. What I want to do is the usual start timer/enable 
> interrupt, catch interrupt #1, save timer, capture interrupt 
> #2, save timer, subtract T1 from T2 and I have half the 
> frequency period (I think). My problem is that although quite 
> saavy in C and other assembly languages this is my first ARM project.

Do those controllers have pulse width measurement hardware?  I thought
that was pretty standard stuff on microprocessors.  If so that's a much
better way than interrupt based.

Maybe somewhere in the Donegan ECM you could find a place for a 926
based microcontroller -- I worked on that one!

> 
> My toolchain is also Linux/GCC-ARM - FreeRTOS already 
> compiles/loads/tests out fine on the 2106 board.

Do you have a debugger?

--steve