Wouldn't it be a good idea if the capture module have a 'one shot'
capabillity.

Example:

After enable,
1st trigger edge: reset TMR1
2nd trigger edge: capture, flag and disable.

Surely this would make it much more usable.

The project I'm working on now is using a 16F876 clocked at 20MHz and
has to control a binary stream of data which appears on a video display
monitor, at the same time, monitor RC2 for speed pulses from 0 - 1KHz,
monitor RS232 and act on input, control a throttle servo and solenoid,
control a stepper motor and a few other housekeeping tasks.

Part of the problem is that the video data stream bogs down the
bandwidth somewhat, so it can't wait around for trigger changes on a pin
to occur and it misses some while servicing the video interrupts.

I've been trying for 5 days now to get this chip to make use of the
capture module while coping with the other software overhead. It can be
a real pain if you don't know when asyncronous pulses arrive, checking
TMR1 for overflows, subtracting new from old etc...

Anyway, that's my gripe.  I finally got all this to work today, but it
sure would have been simpler with a better designed capture module.

--
Best regards

Tony

mICros
http://www.bubblesoftonline.com
mailto:sales@bubblesoftonline.com

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