I am attempting to use as much as I can of the chip.  I am able to

store

default values in the EEPROM area - such as fuel remaining, Fuel

Reserve,

etc.  I've decided to also used the A/D feature to drive the

air/fuel

indicator - may not have it up and running on the first go around,

but

will

have the board wired for it.   Does not look like interface to a

seperate

EEPROM chip would be difficult - but, then I have not gotten that

far yet

in

my research.

Probably bitting off more than I should - as all the guidance says

start

with a simple program, but at least as I work out the bugs I feel

like

I'm

making progress in both the learning and the program.  Now if I

can

just

get

the 255 bits from an 8 bit A/D to correlate to LED lights driven

by

the 7

Seg driver which also drives the 7 seg numeric displays and

remember

to

multiplex 7 digits (3 digits for flow rate and fuel usage each = 6

plus

the

1 for driving the LED) I'll be on my way. {:>).

Lucky I have a high tolerance for frustration {:>)

Ed

You are not using a simple 7 segment LED are you Ed?
I have not done one of those for the last thirty years :-)
Shessss! this is the 21st century. What you need is a smart
display. You send it ASCII and it does the rest.
HP makes a super bright version that all the high buck avionics

people

use. HDSP 2112 or HDSP 2XXX. Newark Electronics. Also second
sourced by Agilent Technologies.
http://www.semiconductor.agilent.com

There is plenty of help on here ask for it.

Paul Lamar

Paul/Ed,
Maybe I missed it on the thread. What PIC chip are you using?
Thanks
Dean

Dean, right now I am looking at the Microchip 18F252 with three ports, 10
bit A/D channels, PW generation, PW Capture, "Flash" memory, etc.

They have a new assembler out (still in beta stage and with a few bugs)
which is quite nice and Free!

Ed Anderson

Ed,
I was looking into the possibilities of using some single chip micros for
instrumentation also. I have been away from the hardware/software for a
while and I am really excited to see what's available for these purposes
now. I had also kicked around the idea of trying to use something like an
iPAQ as the base platform but, started bumping the wall when I tried to find
info on interfacing to it. Have you seen any info on such interfaces?
Thanks
Dean

 
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